WIPHEADmaster

25 files changed, 7815 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..960e009
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,45 @@
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+
+# Microchip files
+*.as
+*.cmf
+*.cof
+*.d
+*.hxl
+*.lst
+*.p1
+*.pre
+*.rlf
+*.sdb
+*.sym
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..cca9a1e
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,315 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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+  6. Each time you redistribute the Program (or any work based on the
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+infringement or for any other reason (not limited to patent issues),
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+This section is intended to make thoroughly clear what is believed to
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+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
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+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    C library for interfacing a T6963C display with a PIC microcontroller
+    Copyright (C) 2015 Camil Staps <info@camilstaps.nl>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
+
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8ab291b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,19 @@
+CC:=xc8
+CFLAGS:=-I. --chip=16F1778 -Q -Wall
+
+SRC:=logger.c spi.c sd.c ff.c diskio.c uart.c util.c dac.c
+DEP:=spi.h sd.h ff.h diskio.h integer.h uart.h logger.h util.h dac.h
+PRS:=$(subst .c,.p1,$(SRC))
+OBJ:=logger.hex
+
+all: $(OBJ)
+
+$(OBJ): $(PRS)
+	$(CC) $(CFLAGS) $^
+
+$(PRS): %.p1: %.c $(DEP)
+	$(CC) $(CFLAGS) -o$@ --pass1 $<
+
+clean:
+	$(RM) all.cof $(addprefix startup.,as lst obj rlf)\
+		$(foreach s,$(SRC),$(addprefix $(subst .c,.,$(s)), as cmf cof d hex hxl lst obj p1 pre rlf sdb sym))
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..554fb44
--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+# CW Logger
+CW logger using a PIC microcontroller
+
+**This is a work in progress.**
+
+This is a CW logger which receives audio and text input (on an analogue pin and
+over UART) and save it to files on an SD card using the FAT32 file system.
+
+Copyright &copy; [Camil Staps](mailto:info@camilstaps.nl). This project is
+licensed under the GPL v2.0 license. For more details, see the `LICENSE` file.
diff --git a/dac.c b/dac.c
new file mode 100644
index 0000000..12fb41c
--- /dev/null
+++ b/dac.c
@@ -0,0 +1,13 @@
+#include <xc.h>
+#include "dac.h"
+
+void dac_init(void) {
+	DAC1REFH = 0x00;
+	DAC1REFL = 0x00;
+	DAC1CON0 = 0xa0; /* enable, output on RA2, VDD - VSS */
+}
+
+inline void dac_set(uint8_t value) {
+	DAC1REFL = value;
+	DACLDbits.DAC1LD = 1;
+}
diff --git a/dac.h b/dac.h
new file mode 100644
index 0000000..f1494f4
--- /dev/null
+++ b/dac.h
@@ -0,0 +1,9 @@
+#ifndef _H_DAC
+#define _H_DAC
+
+#include <stdint.h>
+
+void dac_init(void);
+inline void dac_set(uint8_t value);
+
+#endif
diff --git a/diskio.c b/diskio.c
new file mode 100644
index 0000000..ba12e4a
--- /dev/null
+++ b/diskio.c
@@ -0,0 +1,109 @@
+/*-----------------------------------------------------------------------*/

+/* Low level disk I/O module skeleton for Petit FatFs (C)ChaN, 2014      */

+/*-----------------------------------------------------------------------*/

+

+#include "diskio.h"

+#include "sd.h"

+#include "spi.h"

+#include "util.h"

+

+static void spi_rx_multi(BYTE *buff, UINT cnt) {

+	do {

+		*buff++ = spi_rx();

+	} while (--cnt);

+}

+

+static int rcv_datablock(BYTE *buff, UINT btr) {

+	uint8_t token;

+	uint16_t count = 10000;

+

+	do token = spi_rx(); while (token == 0xff && --count);

+

+	if (token != 0xfe)

+		return 0;

+

+	spi_rx_multi(buff, btr);

+	spi_rx();

+	spi_rx();

+

+	return 1;

+}

+

+/*-----------------------------------------------------------------------*/

+/* Initialize Disk Drive                                                 */

+/*-----------------------------------------------------------------------*/

+

+static DSTATUS status = STA_NODISK;

+

+DSTATUS disk_status(BYTE pdrv) {

+	if (pdrv)

+		return STA_NOINIT;

+	return status;

+}

+

+DSTATUS disk_initialize (BYTE pdrv)

+{

+	uint8_t n, cmd;

+	uint32_t tmr;

+

+	if (!status)

+		return 0;

+

+#ifdef DEBUG

+	printf("Init SD\r\n");

+#endif

+

+	if (sd_init())

+		return STA_NOINIT;

+

+#ifdef DEBUG

+	printf("Done disk_initialize\r\n");

+#endif

+

+	status = 0;

+

+	return 0;

+}

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Read Partial Sector                                                   */

+/*-----------------------------------------------------------------------*/

+

+DRESULT disk_read (

+	BYTE pdrv,      /* Physical drive number (0) */

+	BYTE* buff,		/* Pointer to the destination object */

+	DWORD sector,	/* Sector number (LBA) */

+	UINT count		/* Byte count (bit15:destination) */

+)

+{

+	DRESULT res = RES_ERROR;

+	BYTE rc;

+	UINT bc;

+

+	if (pdrv || !count)

+		return RES_PARERR;

+	if (status && STA_NOINIT)

+		return RES_NOTRDY;

+

+	sector *= 512;

+

+	if (count == 1) {

+		if ((sd_send_command(SD_READ_SINGLE_BLOCK, sector) == 0)

+				&& rcv_datablock(buff, 512))

+			count = 0;

+	} else if (sd_send_command(SD_READ_MULTIPLE_BLOCK, sector) == 0) {

+		do {

+			if (!rcv_datablock(buff, 512))

+				break;

+			buff += 512;

+		} while (--count);

+		sd_send_command(SD_STOP_TRANSMISSION, 0);

+	}

+

+	SD_DESELECT();

+	spi_rx();

+

+	return count ? RES_ERROR : RES_OK;

+}

diff --git a/diskio.h b/diskio.h
new file mode 100644
index 0000000..5312107
--- /dev/null
+++ b/diskio.h
@@ -0,0 +1,45 @@
+/*-----------------------------------------------------------------------

+/  PFF - Low level disk interface modlue include file    (C)ChaN, 2014

+/-----------------------------------------------------------------------*/

+

+#ifndef _DISKIO_DEFINED

+#define _DISKIO_DEFINED

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+

+#include "integer.h"

+#include "logger.h"

+

+

+/* Status of Disk Functions */

+typedef BYTE	DSTATUS;

+

+

+/* Results of Disk Functions */

+typedef enum {

+	RES_OK = 0,		/* 0: Function succeeded */

+	RES_ERROR,		/* 1: Disk error */

+	RES_NOTRDY,		/* 2: Not ready */

+	RES_PARERR		/* 3: Invalid parameter */

+} DRESULT;

+

+

+/*---------------------------------------*/

+/* Prototypes for disk control functions */

+

+DSTATUS disk_status(BYTE pdrv);

+DSTATUS disk_initialize (BYTE pdrv);

+DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count);

+DRESULT disk_write (BYTE* buff, DWORD sc);

+

+#define STA_NOINIT		0x01	/* Drive not initialized */

+#define STA_NODISK		0x02	/* No medium in the drive */

+#define STA_PROTECT		0x04	/* Write protected */

+

+#ifdef __cplusplus

+}

+#endif

+

+#endif	/* _DISKIO_DEFINED */

diff --git a/ff.c b/ff.c
new file mode 100644
index 0000000..ffc5240
--- /dev/null
+++ b/ff.c
@@ -0,0 +1,6041 @@
+/*----------------------------------------------------------------------------/

+/  FatFs - Generic FAT file system module  R0.12b                             /

+/-----------------------------------------------------------------------------/

+/

+/ Copyright (C) 2016, ChaN, all right reserved.

+/

+/ FatFs module is an open source software. Redistribution and use of FatFs in

+/ source and binary forms, with or without modification, are permitted provided

+/ that the following condition is met:

+

+/ 1. Redistributions of source code must retain the above copyright notice,

+/    this condition and the following disclaimer.

+/

+/ This software is provided by the copyright holder and contributors "AS IS"

+/ and any warranties related to this software are DISCLAIMED.

+/ The copyright owner or contributors be NOT LIABLE for any damages caused

+/ by use of this software.

+/----------------------------------------------------------------------------*/

+

+

+#include "ff.h"			/* Declarations of FatFs API */

+#include "diskio.h"		/* Declarations of device I/O functions */

+

+

+/*--------------------------------------------------------------------------

+

+   Module Private Definitions

+

+---------------------------------------------------------------------------*/

+

+#if _FATFS != 68020	/* Revision ID */

+#error Wrong include file (ff.h).

+#endif

+

+

+#define	ABORT(fs, res)		{ fp->err = (BYTE)(res); LEAVE_FF(fs, res); }

+

+

+/* Reentrancy related */

+#if _FS_REENTRANT

+#if _USE_LFN == 1

+#error Static LFN work area cannot be used at thread-safe configuration

+#endif

+#define	ENTER_FF(fs)		{ if (!lock_fs(fs)) return FR_TIMEOUT; }

+#define	LEAVE_FF(fs, res)	{ unlock_fs(fs, res); return res; }

+#else

+#define	ENTER_FF(fs)

+#define LEAVE_FF(fs, res)	return res

+#endif

+

+

+

+/* Definitions of sector size */

+#if (_MAX_SS < _MIN_SS) || (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) || (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096)

+#error Wrong sector size configuration

+#endif

+#if _MAX_SS == _MIN_SS

+#define	SS(fs)	((UINT)_MAX_SS)	/* Fixed sector size */

+#else

+#define	SS(fs)	((fs)->ssize)	/* Variable sector size */

+#endif

+

+

+/* Timestamp */

+#if _FS_NORTC == 1

+#if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31

+#error Invalid _FS_NORTC settings

+#endif

+#define GET_FATTIME()	((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16)

+#else

+#define GET_FATTIME()	get_fattime()

+#endif

+

+

+/* File lock controls */

+#if _FS_LOCK != 0

+#if _FS_READONLY

+#error _FS_LOCK must be 0 at read-only configuration

+#endif

+typedef struct {

+	FATFS *fs;		/* Object ID 1, volume (NULL:blank entry) */

+	DWORD clu;		/* Object ID 2, directory (0:root) */

+	DWORD ofs;		/* Object ID 3, directory offset */

+	WORD ctr;		/* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */

+} FILESEM;

+#endif

+

+

+

+/* DBCS code ranges and SBCS upper conversion tables */

+

+#if _CODE_PAGE == 932	/* Japanese Shift-JIS */

+#define _DF1S	0x81	/* DBC 1st byte range 1 start */

+#define _DF1E	0x9F	/* DBC 1st byte range 1 end */

+#define _DF2S	0xE0	/* DBC 1st byte range 2 start */

+#define _DF2E	0xFC	/* DBC 1st byte range 2 end */

+#define _DS1S	0x40	/* DBC 2nd byte range 1 start */

+#define _DS1E	0x7E	/* DBC 2nd byte range 1 end */

+#define _DS2S	0x80	/* DBC 2nd byte range 2 start */

+#define _DS2E	0xFC	/* DBC 2nd byte range 2 end */

+

+#elif _CODE_PAGE == 936	/* Simplified Chinese GBK */

+#define _DF1S	0x81

+#define _DF1E	0xFE

+#define _DS1S	0x40

+#define _DS1E	0x7E

+#define _DS2S	0x80

+#define _DS2E	0xFE

+

+#elif _CODE_PAGE == 949	/* Korean */

+#define _DF1S	0x81

+#define _DF1E	0xFE

+#define _DS1S	0x41

+#define _DS1E	0x5A

+#define _DS2S	0x61

+#define _DS2E	0x7A

+#define _DS3S	0x81

+#define _DS3E	0xFE

+

+#elif _CODE_PAGE == 950	/* Traditional Chinese Big5 */

+#define _DF1S	0x81

+#define _DF1E	0xFE

+#define _DS1S	0x40

+#define _DS1E	0x7E

+#define _DS2S	0xA1

+#define _DS2E	0xFE

+

+#elif _CODE_PAGE == 437	/* U.S. */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \

+				0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 720	/* Arabic */

+#define _DF1S	0

+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 737	/* Greek */

+#define _DF1S	0

+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \

+				0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 771	/* KBL */

+#define _DF1S	0

+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \

+				0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}

+

+#elif _CODE_PAGE == 775	/* Baltic */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \

+				0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \

+				0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 850	/* Latin 1 */

+#define _DF1S	0

+#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \

+				0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \

+				0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \

+				0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 852	/* Latin 2 */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \

+				0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \

+				0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}

+

+#elif _CODE_PAGE == 855	/* Cyrillic */

+#define _DF1S	0

+#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \

+				0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \

+				0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \

+				0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \

+				0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 857	/* Turkish */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \

+				0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \

+				0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 860	/* Portuguese */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \

+				0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 861	/* Icelandic */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \

+				0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \

+				0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 862	/* Hebrew */

+#define _DF1S	0

+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 863	/* Canadian-French */

+#define _DF1S	0

+#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \

+				0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \

+				0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 864	/* Arabic */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \

+				0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 865	/* Nordic */

+#define _DF1S	0

+#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \

+				0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+				0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 866	/* Russian */

+#define _DF1S	0

+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+				0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+				0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+

+#elif _CODE_PAGE == 869	/* Greek 2 */

+#define _DF1S	0

+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+				0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \

+				0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+				0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+				0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \

+				0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \

+				0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}

+

+#elif _CODE_PAGE == 1	/* ASCII (for only non-LFN cfg) */

+#if _USE_LFN != 0

+#error Cannot enable LFN without valid code page.

+#endif

+#define _DF1S	0

+

+#else

+#error Unknown code page

+

+#endif

+

+

+/* Character code support macros */

+#define IsUpper(c)	(((c)>='A')&&((c)<='Z'))

+#define IsLower(c)	(((c)>='a')&&((c)<='z'))

+#define IsDigit(c)	(((c)>='0')&&((c)<='9'))

+

+#if _DF1S != 0	/* Code page is DBCS */

+

+#ifdef _DF2S	/* Two 1st byte areas */

+#define IsDBCS1(c)	(((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))

+#else			/* One 1st byte area */

+#define IsDBCS1(c)	((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)

+#endif

+

+#ifdef _DS3S	/* Three 2nd byte areas */

+#define IsDBCS2(c)	(((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))

+#else			/* Two 2nd byte areas */

+#define IsDBCS2(c)	(((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))

+#endif

+

+#else			/* Code page is SBCS */

+

+#define IsDBCS1(c)	0

+#define IsDBCS2(c)	0

+

+#endif /* _DF1S */

+

+

+/* File attribute bits (internal use) */

+#define	AM_VOL		0x08	/* Volume label */

+#define AM_LFN		0x0F	/* LFN entry */

+#define AM_MASK		0x3F	/* Mask of defined bits */

+

+

+/* File access control and file status flags (internal use) */

+#define FA_SEEKEND	0x20	/* Seek to end of the file on file open */

+#define FA_MODIFIED	0x40	/* File has been modified */

+#define FA_DIRTY	0x80	/* FIL.buf[] needs to be written-back */

+

+

+/* Name status flags */

+#define NSFLAG		11		/* Index of name status byte in fn[] */

+#define NS_LOSS		0x01	/* Out of 8.3 format */

+#define NS_LFN		0x02	/* Force to create LFN entry */

+#define NS_LAST		0x04	/* Last segment */

+#define NS_BODY		0x08	/* Lower case flag (body) */

+#define NS_EXT		0x10	/* Lower case flag (ext) */

+#define NS_DOT		0x20	/* Dot entry */

+#define NS_NOLFN	0x40	/* Do not find LFN */

+#define NS_NONAME	0x80	/* Not followed */

+

+

+/* Limits and boundaries (differ from specs but correct for real DOS/Windows) */

+#define MAX_FAT12	0xFF5			/* Maximum number of FAT12 clusters */

+#define	MAX_FAT16	0xFFF5			/* Maximum number of FAT16 clusters */

+#define	MAX_FAT32	0xFFFFFF5		/* Maximum number of FAT32 clusters */

+#define	MAX_EXFAT	0x7FFFFFFD		/* Maximum number of exFAT clusters (limited by implementation) */

+#define MAX_DIR		0x200000		/* Maximum size of FAT directory */

+#define MAX_DIR_EX	0x10000000		/* Maximum size of exFAT directory */

+

+

+/* FatFs refers the members in the FAT structures as byte array instead of

+/ structure members because the structure is not binary compatible between

+/ different platforms */

+

+#define BS_JmpBoot			0		/* x86 jump instruction (3-byte) */

+#define BS_OEMName			3		/* OEM name (8-byte) */

+#define BPB_BytsPerSec		11		/* Sector size [byte] (WORD) */

+#define BPB_SecPerClus		13		/* Cluster size [sector] (BYTE) */

+#define BPB_RsvdSecCnt		14		/* Size of reserved area [sector] (WORD) */

+#define BPB_NumFATs			16		/* Number of FATs (BYTE) */

+#define BPB_RootEntCnt		17		/* Size of root directory area for FAT12/16 [entry] (WORD) */

+#define BPB_TotSec16		19		/* Volume size (16-bit) [sector] (WORD) */

+#define BPB_Media			21		/* Media descriptor byte (BYTE) */

+#define BPB_FATSz16			22		/* FAT size (16-bit) [sector] (WORD) */

+#define BPB_SecPerTrk		24		/* Track size for int13h [sector] (WORD) */

+#define BPB_NumHeads		26		/* Number of heads for int13h (WORD) */

+#define BPB_HiddSec			28		/* Volume offset from top of the drive (DWORD) */

+#define BPB_TotSec32		32		/* Volume size (32-bit) [sector] (DWORD) */

+#define BS_DrvNum			36		/* Physical drive number for int13h (BYTE) */

+#define BS_NTres			37		/* Error flag (BYTE) */

+#define BS_BootSig			38		/* Extended boot signature (BYTE) */

+#define BS_VolID			39		/* Volume serial number (DWORD) */

+#define BS_VolLab			43		/* Volume label string (8-byte) */

+#define BS_FilSysType		54		/* File system type string (8-byte) */

+#define BS_BootCode			62		/* Boot code (448-byte) */

+#define BS_55AA				510		/* Signature word (WORD) */

+

+#define BPB_FATSz32			36		/* FAT32: FAT size [sector] (DWORD) */

+#define BPB_ExtFlags32		40		/* FAT32: Extended flags (WORD) */

+#define BPB_FSVer32			42		/* FAT32: File system version (WORD) */

+#define BPB_RootClus32		44		/* FAT32: Root directory cluster (DWORD) */

+#define BPB_FSInfo32		48		/* FAT32: Offset of FSINFO sector (WORD) */

+#define BPB_BkBootSec32		50		/* FAT32: Offset of backup boot sector (WORD) */

+#define BS_DrvNum32			64		/* FAT32: Physical drive number for int13h (BYTE) */

+#define BS_NTres32			65		/* FAT32: Error flag (BYTE) */

+#define BS_BootSig32		66		/* FAT32: Extended boot signature (BYTE) */

+#define BS_VolID32			67		/* FAT32: Volume serial number (DWORD) */

+#define BS_VolLab32			71		/* FAT32: Volume label string (8-byte) */

+#define BS_FilSysType32		82		/* FAT32: File system type string (8-byte) */

+#define BS_BootCode32		90		/* FAT32: Boot code (420-byte) */

+

+#define BPB_ZeroedEx		11		/* exFAT: MBZ field (53-byte) */

+#define BPB_VolOfsEx		64		/* exFAT: Volume offset from top of the drive [sector] (QWORD) */

+#define BPB_TotSecEx		72		/* exFAT: Volume size [sector] (QWORD) */

+#define BPB_FatOfsEx		80		/* exFAT: FAT offset from top of the volume [sector] (DWORD) */

+#define BPB_FatSzEx			84		/* exFAT: FAT size [sector] (DWORD) */

+#define BPB_DataOfsEx		88		/* exFAT: Data offset from top of the volume [sector] (DWORD) */

+#define BPB_NumClusEx		92		/* exFAT: Number of clusters (DWORD) */

+#define BPB_RootClusEx		96		/* exFAT: Root directory cluster (DWORD) */

+#define BPB_VolIDEx			100		/* exFAT: Volume serial number (DWORD) */

+#define BPB_FSVerEx			104		/* exFAT: File system version (WORD) */

+#define BPB_VolFlagEx		106		/* exFAT: Volume flags (BYTE) */

+#define BPB_ActFatEx		107		/* exFAT: Active FAT flags (BYTE) */

+#define BPB_BytsPerSecEx	108		/* exFAT: Log2 of sector size in byte (BYTE) */

+#define BPB_SecPerClusEx	109		/* exFAT: Log2 of cluster size in sector (BYTE) */

+#define BPB_NumFATsEx		110		/* exFAT: Number of FATs (BYTE) */

+#define BPB_DrvNumEx		111		/* exFAT: Physical drive number for int13h (BYTE) */

+#define BPB_PercInUseEx		112		/* exFAT: Percent in use (BYTE) */

+#define	BPB_RsvdEx			113		/* exFAT: Reserved (7-byte) */

+#define BS_BootCodeEx		120		/* exFAT: Boot code (390-byte) */

+

+#define	FSI_LeadSig			0		/* FAT32 FSI: Leading signature (DWORD) */

+#define	FSI_StrucSig		484		/* FAT32 FSI: Structure signature (DWORD) */

+#define	FSI_Free_Count		488		/* FAT32 FSI: Number of free clusters (DWORD) */

+#define	FSI_Nxt_Free		492		/* FAT32 FSI: Last allocated cluster (DWORD) */

+

+#define MBR_Table			446		/* MBR: Offset of partition table in the MBR */

+#define	SZ_PTE				16		/* MBR: Size of a partition table entry */

+#define PTE_Boot			0		/* MBR PTE: Boot indicator */

+#define PTE_StHead			1		/* MBR PTE: Start head */

+#define PTE_StSec			2		/* MBR PTE: Start sector */

+#define PTE_StCyl			3		/* MBR PTE: Start cylinder */

+#define PTE_System			4		/* MBR PTE: System ID */

+#define PTE_EdHead			5		/* MBR PTE: End head */

+#define PTE_EdSec			6		/* MBR PTE: End sector */

+#define PTE_EdCyl			7		/* MBR PTE: End cylinder */

+#define PTE_StLba			8		/* MBR PTE: Start in LBA */

+#define PTE_SizLba			12		/* MBR PTE: Size in LBA */

+

+#define	DIR_Name			0		/* Short file name (11-byte) */

+#define	DIR_Attr			11		/* Attribute (BYTE) */

+#define	DIR_NTres			12		/* Lower case flag (BYTE) */

+#define DIR_CrtTime10		13		/* Created time sub-second (BYTE) */

+#define	DIR_CrtTime			14		/* Created time (DWORD) */

+#define DIR_LstAccDate		18		/* Last accessed date (WORD) */

+#define	DIR_FstClusHI		20		/* Higher 16-bit of first cluster (WORD) */

+#define	DIR_ModTime			22		/* Modified time (DWORD) */

+#define	DIR_FstClusLO		26		/* Lower 16-bit of first cluster (WORD) */

+#define	DIR_FileSize		28		/* File size (DWORD) */

+#define	LDIR_Ord			0		/* LFN entry order and LLE flag (BYTE) */

+#define	LDIR_Attr			11		/* LFN attribute (BYTE) */

+#define	LDIR_Type			12		/* LFN type (BYTE) */

+#define	LDIR_Chksum			13		/* Checksum of the SFN entry (BYTE) */

+#define	LDIR_FstClusLO		26		/* Must be zero (WORD) */

+#define	XDIR_Type			0		/* Type of exFAT directory entry (BYTE) */

+#define	XDIR_NumLabel		1		/* Number of volume label characters (BYTE) */

+#define	XDIR_Label			2		/* Volume label (11-WORD) */

+#define	XDIR_CaseSum		4		/* Sum of case conversion table (DWORD) */

+#define	XDIR_NumSec			1		/* Number of secondary entries (BYTE) */

+#define	XDIR_SetSum			2		/* Sum of the set of directory entries (WORD) */

+#define	XDIR_Attr			4		/* File attribute (WORD) */

+#define	XDIR_CrtTime		8		/* Created time (DWORD) */

+#define	XDIR_ModTime		12		/* Modified time (DWORD) */

+#define	XDIR_AccTime		16		/* Last accessed time (DWORD) */

+#define	XDIR_CrtTime10		20		/* Created time subsecond (BYTE) */

+#define	XDIR_ModTime10		21		/* Modified time subsecond (BYTE) */

+#define	XDIR_CrtTZ			22		/* Created timezone (BYTE) */

+#define	XDIR_ModTZ			23		/* Modified timezone (BYTE) */

+#define	XDIR_AccTZ			24		/* Last accessed timezone (BYTE) */

+#define	XDIR_GenFlags		33		/* Gneral secondary flags (WORD) */

+#define	XDIR_NumName		35		/* Number of file name characters (BYTE) */

+#define	XDIR_NameHash		36		/* Hash of file name (WORD) */

+#define XDIR_ValidFileSize	40		/* Valid file size (QWORD) */

+#define	XDIR_FstClus		52		/* First cluster of the file data (DWORD) */

+#define	XDIR_FileSize		56		/* File/Directory size (QWORD) */

+

+#define	SZDIRE				32		/* Size of a directory entry */

+#define	LLEF				0x40	/* Last long entry flag in LDIR_Ord */

+#define	DDEM				0xE5	/* Deleted directory entry mark set to DIR_Name[0] */

+#define	RDDEM				0x05	/* Replacement of the character collides with DDEM */

+

+

+

+

+

+/*--------------------------------------------------------------------------

+

+   Module Private Work Area

+

+---------------------------------------------------------------------------*/

+

+/* Remark: Variables here without initial value shall be guaranteed zero/null

+/  at start-up. If not, either the linker or start-up routine being used is

+/  not compliance with C standard. */

+

+#if _VOLUMES < 1 || _VOLUMES > 9

+#error Wrong _VOLUMES setting

+#endif

+static FATFS *FatFs[_VOLUMES];	/* Pointer to the file system objects (logical drives) */

+static WORD Fsid;				/* File system mount ID */

+

+#if _FS_RPATH != 0 && _VOLUMES >= 2

+static BYTE CurrVol;			/* Current drive */

+#endif

+

+#if _FS_LOCK != 0

+static FILESEM Files[_FS_LOCK];	/* Open object lock semaphores */

+#endif

+

+#if _USE_LFN == 0			/* Non-LFN configuration */

+#define	DEF_NAMBUF

+#define INIT_NAMBUF(fs)

+#define	FREE_NAMBUF()

+#else

+#if _MAX_LFN < 12 || _MAX_LFN > 255

+#error Wrong _MAX_LFN setting

+#endif

+

+#if _USE_LFN == 1		/* LFN enabled with static working buffer */

+#if _FS_EXFAT

+static BYTE	DirBuf[SZDIRE*19];	/* Directory entry block scratchpad buffer (19 entries in size) */

+#endif

+static WCHAR LfnBuf[_MAX_LFN+1];	/* LFN enabled with static working buffer */

+#define	DEF_NAMBUF

+#define INIT_NAMBUF(fs)

+#define	FREE_NAMBUF()

+

+#elif _USE_LFN == 2 	/* LFN enabled with dynamic working buffer on the stack */

+#if _FS_EXFAT

+#define	DEF_NAMBUF		WCHAR lbuf[_MAX_LFN+1]; BYTE dbuf[SZDIRE*19];

+#define INIT_NAMBUF(fs)	{ (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }

+#define	FREE_NAMBUF()

+#else

+#define	DEF_NAMBUF		WCHAR lbuf[_MAX_LFN+1];

+#define INIT_NAMBUF(fs)	{ (fs)->lfnbuf = lbuf; }

+#define	FREE_NAMBUF()

+#endif

+

+#elif _USE_LFN == 3 	/* LFN enabled with dynamic working buffer on the heap */

+#if _FS_EXFAT

+#define	DEF_NAMBUF		WCHAR *lfn;

+#define INIT_NAMBUF(fs)	{ lfn = ff_memalloc((_MAX_LFN+1)*2 + SZDIRE*19); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+_MAX_LFN+1); }

+#define	FREE_NAMBUF()	ff_memfree(lfn)

+#else

+#define	DEF_NAMBUF		WCHAR *lfn;

+#define INIT_NAMBUF(fs)	{ lfn = ff_memalloc((_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }

+#define	FREE_NAMBUF()	ff_memfree(lfn)

+#endif

+

+#else

+#error Wrong _USE_LFN setting

+#endif

+#endif

+

+#ifdef _EXCVT

+static const BYTE ExCvt[] = _EXCVT;	/* Upper conversion table for SBCS extended characters */

+#endif

+

+

+

+

+

+

+/*--------------------------------------------------------------------------

+

+   Module Private Functions

+

+---------------------------------------------------------------------------*/

+

+

+/*-----------------------------------------------------------------------*/

+/* Load/Store multi-byte word in the FAT structure                       */

+/*-----------------------------------------------------------------------*/

+

+static

+WORD ld_word (const BYTE* ptr)	/*	 Load a 2-byte little-endian word */

+{

+	WORD rv;

+

+	rv = ptr[1];

+	rv = rv << 8 | ptr[0];

+	return rv;

+}

+

+static

+DWORD ld_dword (const BYTE* ptr)	/* Load a 4-byte little-endian word */

+{

+	DWORD rv;

+

+	rv = ptr[3];

+	rv = rv << 8 | ptr[2];

+	rv = rv << 8 | ptr[1];

+	rv = rv << 8 | ptr[0];

+	return rv;

+}

+

+#if _FS_EXFAT

+static

+QWORD ld_qword (const BYTE* ptr)	/* Load an 8-byte little-endian word */

+{

+	QWORD rv;

+

+	rv = ptr[7];

+	rv = rv << 8 | ptr[6];

+	rv = rv << 8 | ptr[5];

+	rv = rv << 8 | ptr[4];

+	rv = rv << 8 | ptr[3];

+	rv = rv << 8 | ptr[2];

+	rv = rv << 8 | ptr[1];

+	rv = rv << 8 | ptr[0];

+	return rv;

+}

+#endif

+

+#if !_FS_READONLY

+static

+void st_word (BYTE* ptr, WORD val)	/* Store a 2-byte word in little-endian */

+{

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val;

+}

+

+static

+void st_dword (BYTE* ptr, DWORD val)	/* Store a 4-byte word in little-endian */

+{

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val;

+}

+

+#if _FS_EXFAT

+static

+void st_qword (BYTE* ptr, QWORD val)	/* Store an 8-byte word in little-endian */

+{

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val;

+}

+#endif

+#endif	/* !_FS_READONLY */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* String functions                                                      */

+/*-----------------------------------------------------------------------*/

+

+/* Copy memory to memory */

+static

+void mem_cpy (void* dst, const void* src, UINT cnt) {

+	BYTE *d = (BYTE*)dst;

+	const BYTE *s = (const BYTE*)src;

+

+	if (cnt) {

+		do *d++ = *s++; while (--cnt);

+	}

+}

+

+/* Fill memory block */

+static

+void mem_set (void* dst, int val, UINT cnt) {

+	BYTE *d = (BYTE*)dst;

+

+	do *d++ = (BYTE)val; while (--cnt);

+}

+

+/* Compare memory block */

+static

+int mem_cmp (const void* dst, const void* src, UINT cnt) {	/* ZR:same, NZ:different */

+	const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;

+	int r = 0;

+

+	do {

+		r = *d++ - *s++;

+	} while (--cnt && r == 0);

+

+	return r;

+}

+

+/* Check if chr is contained in the string */

+static

+int chk_chr (const char* str, int chr) {	/* NZ:contained, ZR:not contained */

+	while (*str && *str != chr) str++;

+	return *str;

+}

+

+

+

+

+#if _FS_REENTRANT

+/*-----------------------------------------------------------------------*/

+/* Request/Release grant to access the volume                            */

+/*-----------------------------------------------------------------------*/

+static

+int lock_fs (

+	FATFS* fs		/* File system object */

+)

+{

+	return ff_req_grant(fs->sobj);

+}

+

+

+static

+void unlock_fs (

+	FATFS* fs,		/* File system object */

+	FRESULT res		/* Result code to be returned */

+)

+{

+	if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {

+		ff_rel_grant(fs->sobj);

+	}

+}

+

+#endif

+

+

+

+#if _FS_LOCK != 0

+/*-----------------------------------------------------------------------*/

+/* File lock control functions                                           */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT chk_lock (	/* Check if the file can be accessed */

+	DIR* dp,		/* Directory object pointing the file to be checked */

+	int acc			/* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */

+)

+{

+	UINT i, be;

+

+	/* Search file semaphore table */

+	for (i = be = 0; i < _FS_LOCK; i++) {

+		if (Files[i].fs) {	/* Existing entry */

+			if (Files[i].fs == dp->obj.fs &&	 	/* Check if the object matched with an open object */

+				Files[i].clu == dp->obj.sclust &&

+				Files[i].ofs == dp->dptr) break;

+		} else {			/* Blank entry */

+			be = 1;

+		}

+	}

+	if (i == _FS_LOCK) {	/* The object is not opened */

+		return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES;	/* Is there a blank entry for new object? */

+	}

+

+	/* The object has been opened. Reject any open against writing file and all write mode open */

+	return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;

+}

+

+

+static

+int enq_lock (void)	/* Check if an entry is available for a new object */

+{

+	UINT i;

+

+	for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;

+	return (i == _FS_LOCK) ? 0 : 1;

+}

+

+

+static

+UINT inc_lock (	/* Increment object open counter and returns its index (0:Internal error) */

+	DIR* dp,	/* Directory object pointing the file to register or increment */

+	int acc		/* Desired access (0:Read, 1:Write, 2:Delete/Rename) */

+)

+{

+	UINT i;

+

+

+	for (i = 0; i < _FS_LOCK; i++) {	/* Find the object */

+		if (Files[i].fs == dp->obj.fs &&

+			Files[i].clu == dp->obj.sclust &&

+			Files[i].ofs == dp->dptr) break;

+	}

+

+	if (i == _FS_LOCK) {				/* Not opened. Register it as new. */

+		for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;

+		if (i == _FS_LOCK) return 0;	/* No free entry to register (int err) */

+		Files[i].fs = dp->obj.fs;

+		Files[i].clu = dp->obj.sclust;

+		Files[i].ofs = dp->dptr;

+		Files[i].ctr = 0;

+	}

+

+	if (acc && Files[i].ctr) return 0;	/* Access violation (int err) */

+

+	Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1;	/* Set semaphore value */

+

+	return i + 1;

+}

+

+

+static

+FRESULT dec_lock (	/* Decrement object open counter */

+	UINT i			/* Semaphore index (1..) */

+)

+{

+	WORD n;

+	FRESULT res;

+

+

+	if (--i < _FS_LOCK) {	/* Shift index number origin from 0 */

+		n = Files[i].ctr;

+		if (n == 0x100) n = 0;		/* If write mode open, delete the entry */

+		if (n > 0) n--;				/* Decrement read mode open count */

+		Files[i].ctr = n;

+		if (n == 0) Files[i].fs = 0;	/* Delete the entry if open count gets zero */

+		res = FR_OK;

+	} else {

+		res = FR_INT_ERR;			/* Invalid index nunber */

+	}

+	return res;

+}

+

+

+static

+void clear_lock (	/* Clear lock entries of the volume */

+	FATFS *fs

+)

+{

+	UINT i;

+

+	for (i = 0; i < _FS_LOCK; i++) {

+		if (Files[i].fs == fs) Files[i].fs = 0;

+	}

+}

+

+#endif	/* _FS_LOCK != 0 */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Move/Flush disk access window in the file system object               */

+/*-----------------------------------------------------------------------*/

+#if !_FS_READONLY

+static

+FRESULT sync_window (	/* Returns FR_OK or FR_DISK_ERROR */

+	FATFS* fs			/* File system object */

+)

+{

+	DWORD wsect;

+	UINT nf;

+	FRESULT res = FR_OK;

+

+

+	if (fs->wflag) {	/* Write back the sector if it is dirty */

+		wsect = fs->winsect;	/* Current sector number */

+		if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {

+			res = FR_DISK_ERR;

+		} else {

+			fs->wflag = 0;

+			if (wsect - fs->fatbase < fs->fsize) {		/* Is it in the FAT area? */

+				for (nf = fs->n_fats; nf >= 2; nf--) {	/* Reflect the change to all FAT copies */

+					wsect += fs->fsize;

+					disk_write(fs->drv, fs->win, wsect, 1);

+				}

+			}

+		}

+	}

+	return res;

+}

+#endif

+

+

+static

+FRESULT move_window (	/* Returns FR_OK or FR_DISK_ERROR */

+	FATFS* fs,			/* File system object */

+	DWORD sector		/* Sector number to make appearance in the fs->win[] */

+)

+{

+	FRESULT res = FR_OK;

+

+

+	if (sector != fs->winsect) {	/* Window offset changed? */

+#if !_FS_READONLY

+		res = sync_window(fs);		/* Write-back changes */

+#endif

+		if (res == FR_OK) {			/* Fill sector window with new data */

+			if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {

+				sector = 0xFFFFFFFF;	/* Invalidate window if data is not reliable */

+				res = FR_DISK_ERR;

+			}

+			fs->winsect = sector;

+		}

+	}

+	return res;

+}

+

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Synchronize file system and strage device                             */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT sync_fs (	/* FR_OK:succeeded, !=0:error */

+	FATFS* fs		/* File system object */

+)

+{

+	FRESULT res;

+

+

+	res = sync_window(fs);

+	if (res == FR_OK) {

+		/* Update FSInfo sector if needed */

+		if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {

+			/* Create FSInfo structure */

+			mem_set(fs->win, 0, SS(fs));

+			st_word(fs->win + BS_55AA, 0xAA55);

+			st_dword(fs->win + FSI_LeadSig, 0x41615252);

+			st_dword(fs->win + FSI_StrucSig, 0x61417272);

+			st_dword(fs->win + FSI_Free_Count, fs->free_clst);

+			st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);

+			/* Write it into the FSInfo sector */

+			fs->winsect = fs->volbase + 1;

+			disk_write(fs->drv, fs->win, fs->winsect, 1);

+			fs->fsi_flag = 0;

+		}

+		/* Make sure that no pending write process in the physical drive */

+		if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;

+	}

+

+	return res;

+}

+

+#endif

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Get sector# from cluster#                                             */

+/*-----------------------------------------------------------------------*/

+

+static

+DWORD clust2sect (	/* !=0:Sector number, 0:Failed (invalid cluster#) */

+	FATFS* fs,		/* File system object */

+	DWORD clst		/* Cluster# to be converted */

+)

+{

+	clst -= 2;

+	if (clst >= fs->n_fatent - 2) return 0;		/* Invalid cluster# */

+	return clst * fs->csize + fs->database;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* FAT access - Read value of a FAT entry                                */

+/*-----------------------------------------------------------------------*/

+

+static

+DWORD get_fat (	/* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */

+	_FDID* obj,	/* Corresponding object */

+	DWORD clst	/* Cluster number to get the value */

+)

+{

+	UINT wc, bc;

+	DWORD val;

+	FATFS *fs = obj->fs;

+

+

+	if (clst < 2 || clst >= fs->n_fatent) {	/* Check if in valid range */

+		val = 1;	/* Internal error */

+

+	} else {

+		val = 0xFFFFFFFF;	/* Default value falls on disk error */

+

+		switch (fs->fs_type) {

+		case FS_FAT12 :

+			bc = (UINT)clst; bc += bc / 2;

+			if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;

+			wc = fs->win[bc++ % SS(fs)];

+			if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;

+			wc |= fs->win[bc % SS(fs)] << 8;

+			val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF);

+			break;

+

+		case FS_FAT16 :

+			if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;

+			val = ld_word(fs->win + clst * 2 % SS(fs));

+			break;

+

+		case FS_FAT32 :

+			if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;

+			val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF;

+			break;

+#if _FS_EXFAT

+		case FS_EXFAT :

+			if (obj->objsize) {

+				DWORD cofs = clst - obj->sclust;	/* Offset from start cluster */

+				DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize;	/* Number of clusters - 1 */

+

+				if (obj->stat == 2) {	/* Is there no valid chain on the FAT? */

+					if (cofs <= clen) {

+						val = (cofs == clen) ? 0x7FFFFFFF : clst + 1;	/* Generate the value */

+						break;

+					}

+				}

+				if (obj->stat == 3 && cofs < obj->n_cont) {	/* Is it in the contiguous part? */

+					val = clst + 1; 	/* Generate the value */

+					break;

+				}

+				if (obj->stat != 2) {	/* Get value from FAT if FAT chain is valid */

+					if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;

+					val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;

+					break;

+				}

+			}

+			/* go next */

+#endif

+		default:

+			val = 1;	/* Internal error */

+		}

+	}

+

+	return val;

+}

+

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* FAT access - Change value of a FAT entry                              */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT put_fat (	/* FR_OK(0):succeeded, !=0:error */

+	FATFS* fs,		/* Corresponding file system object */

+	DWORD clst,		/* FAT index number (cluster number) to be changed */

+	DWORD val		/* New value to be set to the entry */

+)

+{

+	UINT bc;

+	BYTE *p;

+	FRESULT res = FR_INT_ERR;

+

+

+	if (clst >= 2 && clst < fs->n_fatent) {	/* Check if in valid range */

+		switch (fs->fs_type) {

+		case FS_FAT12 :	/* Bitfield items */

+			bc = (UINT)clst; bc += bc / 2;

+			res = move_window(fs, fs->fatbase + (bc / SS(fs)));

+			if (res != FR_OK) break;

+			p = fs->win + bc++ % SS(fs);

+			*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;

+			fs->wflag = 1;

+			res = move_window(fs, fs->fatbase + (bc / SS(fs)));

+			if (res != FR_OK) break;

+			p = fs->win + bc % SS(fs);

+			*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));

+			fs->wflag = 1;

+			break;

+

+		case FS_FAT16 :	/* WORD aligned items */

+			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));

+			if (res != FR_OK) break;

+			st_word(fs->win + clst * 2 % SS(fs), (WORD)val);

+			fs->wflag = 1;

+			break;

+

+		case FS_FAT32 :	/* DWORD aligned items */

+#if _FS_EXFAT

+		case FS_EXFAT :

+#endif

+			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));

+			if (res != FR_OK) break;

+			if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {

+				val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);

+			}

+			st_dword(fs->win + clst * 4 % SS(fs), val);

+			fs->wflag = 1;

+			break;

+		}

+	}

+	return res;

+}

+

+#endif /* !_FS_READONLY */

+

+

+

+

+#if _FS_EXFAT && !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* exFAT: Accessing FAT and Allocation Bitmap                            */

+/*-----------------------------------------------------------------------*/

+

+/*---------------------------------------------*/

+/* exFAT: Find a contiguous free cluster block */

+/*---------------------------------------------*/

+

+static

+DWORD find_bitmap (	/* 0:No free cluster, 2..:Free cluster found, 0xFFFFFFFF:Disk error */

+	FATFS* fs,	/* File system object */

+	DWORD clst,	/* Cluster number to scan from */

+	DWORD ncl	/* Number of contiguous clusters to find (1..) */

+)

+{

+	BYTE bm, bv;

+	UINT i;

+	DWORD val, scl, ctr;

+

+

+	clst -= 2;	/* The first bit in the bitmap corresponds to cluster #2 */

+	if (clst >= fs->n_fatent - 2) clst = 0;

+	scl = val = clst; ctr = 0;

+	for (;;) {

+		if (move_window(fs, fs->database + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF;	/* (assuming bitmap is located top of the cluster heap) */

+		i = val / 8 % SS(fs); bm = 1 << (val % 8);

+		do {

+			do {

+				bv = fs->win[i] & bm; bm <<= 1;		/* Get bit value */

+				if (++val >= fs->n_fatent - 2) {	/* Next cluster (with wrap-around) */

+					val = 0; bm = 0; i = 4096;

+				}

+				if (!bv) {	/* Is it a free cluster? */

+					if (++ctr == ncl) return scl + 2;	/* Check run length */

+				} else {

+					scl = val; ctr = 0;		/* Encountered a live cluster, restart to scan */

+				}

+				if (val == clst) return 0;	/* All cluster scanned? */

+			} while (bm);

+			bm = 1;

+		} while (++i < SS(fs));

+	}

+}

+

+

+/*------------------------------------*/

+/* exFAT: Set/Clear a block of bitmap */

+/*------------------------------------*/

+

+static

+FRESULT change_bitmap (

+	FATFS* fs,	/* File system object */

+	DWORD clst,	/* Cluster number to change from */

+	DWORD ncl,	/* Number of clusters to be changed */

+	int bv		/* bit value to be set (0 or 1) */

+)

+{

+	BYTE bm;

+	UINT i;

+	DWORD sect;

+

+

+	clst -= 2;	/* The first bit corresponds to cluster #2 */

+	sect = fs->database + clst / 8 / SS(fs);	/* Sector address (assuming bitmap is located top of the cluster heap) */

+	i = clst / 8 % SS(fs);						/* Byte offset in the sector */

+	bm = 1 << (clst % 8);						/* Bit mask in the byte */

+	for (;;) {

+		if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;

+		do {

+			do {

+				if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR;	/* Is the bit expected value? */

+				fs->win[i] ^= bm;	/* Flip the bit */

+				fs->wflag = 1;

+				if (--ncl == 0) return FR_OK;	/* All bits processed? */

+			} while (bm <<= 1);		/* Next bit */

+			bm = 1;

+		} while (++i < SS(fs));		/* Next byte */

+		i = 0;

+	}

+}

+

+

+/*---------------------------------------------*/

+/* Complement contiguous part of the FAT chain */

+/*---------------------------------------------*/

+

+static

+FRESULT fill_fat_chain (

+	_FDID* obj	/* Pointer to the corresponding object */

+)

+{

+	FRESULT res;

+	DWORD cl, n;

+

+	if (obj->stat == 3) {	/* Has the object been changed 'fragmented'? */

+		for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) {	/* Create cluster chain on the FAT */

+			res = put_fat(obj->fs, cl, cl + 1);

+			if (res != FR_OK) return res;

+		}

+		obj->stat = 0;	/* Change status 'FAT chain is valid' */

+	}

+	return FR_OK;

+}

+

+#endif	/* _FS_EXFAT && !_FS_READONLY */

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* FAT handling - Remove a cluster chain                                 */

+/*-----------------------------------------------------------------------*/

+static

+FRESULT remove_chain (	/* FR_OK(0):succeeded, !=0:error */

+	_FDID* obj,			/* Corresponding object */

+	DWORD clst,			/* Cluster to remove a chain from */

+	DWORD pclst			/* Previous cluster of clst (0:an entire chain) */

+)

+{

+	FRESULT res = FR_OK;

+	DWORD nxt;

+	FATFS *fs = obj->fs;

+#if _FS_EXFAT || _USE_TRIM

+	DWORD scl = clst, ecl = clst;

+#endif

+#if _USE_TRIM

+	DWORD rt[2];

+#endif

+

+	if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR;	/* Check if in valid range */

+

+	/* Mark the previous cluster 'EOC' on the FAT if it exists */

+	if (pclst && (!_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {

+		res = put_fat(fs, pclst, 0xFFFFFFFF);

+		if (res != FR_OK) return res;

+	}

+

+	/* Remove the chain */

+	do {

+		nxt = get_fat(obj, clst);			/* Get cluster status */

+		if (nxt == 0) break;				/* Empty cluster? */

+		if (nxt == 1) return FR_INT_ERR;	/* Internal error? */

+		if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error? */

+		if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {

+			res = put_fat(fs, clst, 0);		/* Mark the cluster 'free' on the FAT */

+			if (res != FR_OK) return res;

+		}

+		if (fs->free_clst < fs->n_fatent - 2) {	/* Update FSINFO */

+			fs->free_clst++;

+			fs->fsi_flag |= 1;

+		}

+#if _FS_EXFAT || _USE_TRIM

+		if (ecl + 1 == nxt) {	/* Is next cluster contiguous? */

+			ecl = nxt;

+		} else {				/* End of contiguous cluster block */ 

+#if _FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				res = change_bitmap(fs, scl, ecl - scl + 1, 0);	/* Mark the cluster block 'free' on the bitmap */

+				if (res != FR_OK) return res;

+			}

+#endif

+#if _USE_TRIM

+			rt[0] = clust2sect(fs, scl);					/* Start sector */

+			rt[1] = clust2sect(fs, ecl) + fs->csize - 1;	/* End sector */

+			disk_ioctl(fs->drv, CTRL_TRIM, rt);				/* Inform device the block can be erased */

+#endif

+			scl = ecl = nxt;

+		}

+#endif

+		clst = nxt;					/* Next cluster */

+	} while (clst < fs->n_fatent);	/* Repeat while not the last link */

+

+#if _FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {

+		if (pclst == 0) {	/* Does object have no chain? */

+			obj->stat = 0;		/* Change the object status 'initial' */

+		} else {

+			if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) {	/* Did the chain got contiguous? */

+				obj->stat = 2;	/* Change the object status 'contiguous' */

+			}

+		}

+	}

+#endif

+	return FR_OK;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* FAT handling - Stretch a chain or Create a new chain                  */

+/*-----------------------------------------------------------------------*/

+static

+DWORD create_chain (	/* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */

+	_FDID* obj,			/* Corresponding object */

+	DWORD clst			/* Cluster# to stretch, 0:Create a new chain */

+)

+{

+	DWORD cs, ncl, scl;

+	FRESULT res;

+	FATFS *fs = obj->fs;

+

+

+	if (clst == 0) {	/* Create a new chain */

+		scl = fs->last_clst;				/* Get suggested cluster to start from */

+		if (scl == 0 || scl >= fs->n_fatent) scl = 1;

+	}

+	else {				/* Stretch current chain */

+		cs = get_fat(obj, clst);			/* Check the cluster status */

+		if (cs < 2) return 1;				/* Invalid value */

+		if (cs == 0xFFFFFFFF) return cs;	/* A disk error occurred */

+		if (cs < fs->n_fatent) return cs;	/* It is already followed by next cluster */

+		scl = clst;

+	}

+

+#if _FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		ncl = find_bitmap(fs, scl, 1);				/* Find a free cluster */

+		if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl;	/* No free cluster or hard error? */

+		res = change_bitmap(fs, ncl, 1, 1);			/* Mark the cluster 'in use' */

+		if (res == FR_INT_ERR) return 1;

+		if (res == FR_DISK_ERR) return 0xFFFFFFFF;

+		if (clst == 0) {							/* Is it a new chain? */

+			obj->stat = 2;							/* Set status 'contiguous chain' */

+		} else {									/* This is a stretched chain */

+			if (obj->stat == 2 && ncl != scl + 1) {	/* Is the chain got fragmented? */

+				obj->n_cont = scl - obj->sclust;	/* Set size of the contiguous part */

+				obj->stat = 3;						/* Change status 'just fragmented' */

+			}

+		}

+	} else

+#endif

+	{	/* On the FAT12/16/32 volume */

+		ncl = scl;	/* Start cluster */

+		for (;;) {

+			ncl++;							/* Next cluster */

+			if (ncl >= fs->n_fatent) {		/* Check wrap-around */

+				ncl = 2;

+				if (ncl > scl) return 0;	/* No free cluster */

+			}

+			cs = get_fat(obj, ncl);			/* Get the cluster status */

+			if (cs == 0) break;				/* Found a free cluster */

+			if (cs == 1 || cs == 0xFFFFFFFF) return cs;	/* An error occurred */

+			if (ncl == scl) return 0;		/* No free cluster */

+		}

+	}

+

+	if (_FS_EXFAT && fs->fs_type == FS_EXFAT && obj->stat == 2) {	/* Is it a contiguous chain? */

+		res = FR_OK;						/* FAT does not need to be written */

+	} else {

+		res = put_fat(fs, ncl, 0xFFFFFFFF);	/* Mark the new cluster 'EOC' */

+		if (res == FR_OK && clst) {

+			res = put_fat(fs, clst, ncl);	/* Link it from the previous one if needed */

+		}

+	}

+

+	if (res == FR_OK) {			/* Update FSINFO if function succeeded. */

+		fs->last_clst = ncl;

+		if (fs->free_clst < fs->n_fatent - 2) fs->free_clst--;

+		fs->fsi_flag |= 1;

+	} else {

+		ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;	/* Failed. Create error status */

+	}

+

+	return ncl;		/* Return new cluster number or error status */

+}

+

+#endif /* !_FS_READONLY */

+

+

+

+

+#if _USE_FASTSEEK

+/*-----------------------------------------------------------------------*/

+/* FAT handling - Convert offset into cluster with link map table        */

+/*-----------------------------------------------------------------------*/

+

+static

+DWORD clmt_clust (	/* <2:Error, >=2:Cluster number */

+	FIL* fp,		/* Pointer to the file object */

+	FSIZE_t ofs		/* File offset to be converted to cluster# */

+)

+{

+	DWORD cl, ncl, *tbl;

+	FATFS *fs = fp->obj.fs;

+

+

+	tbl = fp->cltbl + 1;	/* Top of CLMT */

+	cl = (DWORD)(ofs / SS(fs) / fs->csize);	/* Cluster order from top of the file */

+	for (;;) {

+		ncl = *tbl++;			/* Number of cluters in the fragment */

+		if (ncl == 0) return 0;	/* End of table? (error) */

+		if (cl < ncl) break;	/* In this fragment? */

+		cl -= ncl; tbl++;		/* Next fragment */

+	}

+	return cl + *tbl;	/* Return the cluster number */

+}

+

+#endif	/* _USE_FASTSEEK */

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Set directory index                              */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT dir_sdi (	/* FR_OK(0):succeeded, !=0:error */

+	DIR* dp,		/* Pointer to directory object */

+	DWORD ofs		/* Offset of directory table */

+)

+{

+	DWORD csz, clst;

+	FATFS *fs = dp->obj.fs;

+

+

+	if (ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) {	/* Check range of offset and alignment */

+		return FR_INT_ERR;

+	}

+	dp->dptr = ofs;				/* Set current offset */

+	clst = dp->obj.sclust;		/* Table start cluster (0:root) */

+	if (clst == 0 && fs->fs_type >= FS_FAT32) {	/* Replace cluster# 0 with root cluster# */

+		clst = fs->dirbase;

+		if (_FS_EXFAT) dp->obj.stat = 0;	/* exFAT: Root dir has an FAT chain */

+	}

+

+	if (clst == 0) {	/* Static table (root-directory in FAT12/16) */

+		if (ofs / SZDIRE >= fs->n_rootdir)	return FR_INT_ERR;	/* Is index out of range? */

+		dp->sect = fs->dirbase;

+

+	} else {			/* Dynamic table (sub-directory or root-directory in FAT32+) */

+		csz = (DWORD)fs->csize * SS(fs);	/* Bytes per cluster */

+		while (ofs >= csz) {				/* Follow cluster chain */

+			clst = get_fat(&dp->obj, clst);				/* Get next cluster */

+			if (clst == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error */

+			if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR;	/* Reached to end of table or internal error */

+			ofs -= csz;

+		}

+		dp->sect = clust2sect(fs, clst);

+	}

+	dp->clust = clst;					/* Current cluster# */

+	if (!dp->sect) return FR_INT_ERR;

+	dp->sect += ofs / SS(fs);			/* Sector# of the directory entry */

+	dp->dir = fs->win + (ofs % SS(fs));	/* Pointer to the entry in the win[] */

+

+	return FR_OK;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Move directory table index next                  */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT dir_next (	/* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */

+	DIR* dp,		/* Pointer to the directory object */

+	int stretch		/* 0: Do not stretch table, 1: Stretch table if needed */

+)

+{

+	DWORD ofs, clst;

+	FATFS *fs = dp->obj.fs;

+#if !_FS_READONLY

+	UINT n;

+#endif

+

+	ofs = dp->dptr + SZDIRE;	/* Next entry */

+	if (!dp->sect || ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) return FR_NO_FILE;	/* Report EOT when offset has reached max value */

+

+	if (ofs % SS(fs) == 0) {	/* Sector changed? */

+		dp->sect++;				/* Next sector */

+

+		if (!dp->clust) {		/* Static table */

+			if (ofs / SZDIRE >= fs->n_rootdir) {	/* Report EOT if it reached end of static table */

+				dp->sect = 0; return FR_NO_FILE;

+			}

+		}

+		else {					/* Dynamic table */

+			if ((ofs / SS(fs) & (fs->csize - 1)) == 0) {		/* Cluster changed? */

+				clst = get_fat(&dp->obj, dp->clust);			/* Get next cluster */

+				if (clst <= 1) return FR_INT_ERR;				/* Internal error */

+				if (clst == 0xFFFFFFFF) return FR_DISK_ERR;		/* Disk error */

+				if (clst >= fs->n_fatent) {						/* Reached end of dynamic table */

+#if !_FS_READONLY

+					if (!stretch) {								/* If no stretch, report EOT */

+						dp->sect = 0; return FR_NO_FILE;

+					}

+					clst = create_chain(&dp->obj, dp->clust);	/* Allocate a cluster */

+					if (clst == 0) return FR_DENIED;			/* No free cluster */

+					if (clst == 1) return FR_INT_ERR;			/* Internal error */

+					if (clst == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error */

+					/* Clean-up the stretched table */

+					if (_FS_EXFAT) dp->obj.stat |= 4;			/* The directory needs to be updated */

+					if (sync_window(fs) != FR_OK) return FR_DISK_ERR;	/* Flush disk access window */

+					mem_set(fs->win, 0, SS(fs));				/* Clear window buffer */

+					for (n = 0, fs->winsect = clust2sect(fs, clst); n < fs->csize; n++, fs->winsect++) {	/* Fill the new cluster with 0 */

+						fs->wflag = 1;

+						if (sync_window(fs) != FR_OK) return FR_DISK_ERR;

+					}

+					fs->winsect -= n;							/* Restore window offset */

+#else

+					if (!stretch) dp->sect = 0;					/* If no stretch, report EOT (this is to suppress warning) */

+					dp->sect = 0; return FR_NO_FILE;			/* Report EOT */

+#endif

+				}

+				dp->clust = clst;		/* Initialize data for new cluster */

+				dp->sect = clust2sect(fs, clst);

+			}

+		}

+	}

+	dp->dptr = ofs;						/* Current entry */

+	dp->dir = fs->win + ofs % SS(fs);	/* Pointer to the entry in the win[] */

+

+	return FR_OK;

+}

+

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Reserve a block of directory entries             */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT dir_alloc (	/* FR_OK(0):succeeded, !=0:error */

+	DIR* dp,		/* Pointer to the directory object */

+	UINT nent		/* Number of contiguous entries to allocate */

+)

+{

+	FRESULT res;

+	UINT n;

+	FATFS *fs = dp->obj.fs;

+

+

+	res = dir_sdi(dp, 0);

+	if (res == FR_OK) {

+		n = 0;

+		do {

+			res = move_window(fs, dp->sect);

+			if (res != FR_OK) break;

+#if _FS_EXFAT

+			if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {

+#else

+			if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {

+#endif

+				if (++n == nent) break;	/* A block of contiguous free entries is found */

+			} else {

+				n = 0;					/* Not a blank entry. Restart to search */

+			}

+			res = dir_next(dp, 1);

+		} while (res == FR_OK);	/* Next entry with table stretch enabled */

+	}

+

+	if (res == FR_NO_FILE) res = FR_DENIED;	/* No directory entry to allocate */

+	return res;

+}

+

+#endif	/* !_FS_READONLY */

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* FAT: Directory handling - Load/Store start cluster number             */

+/*-----------------------------------------------------------------------*/

+

+static

+DWORD ld_clust (	/* Returns the top cluster value of the SFN entry */

+	FATFS* fs,		/* Pointer to the fs object */

+	const BYTE* dir	/* Pointer to the key entry */

+)

+{

+	DWORD cl;

+

+	cl = ld_word(dir + DIR_FstClusLO);

+	if (fs->fs_type == FS_FAT32) {

+		cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;

+	}

+

+	return cl;

+}

+

+

+#if !_FS_READONLY

+static

+void st_clust (

+	FATFS* fs,	/* Pointer to the fs object */

+	BYTE* dir,	/* Pointer to the key entry */

+	DWORD cl	/* Value to be set */

+)

+{

+	st_word(dir + DIR_FstClusLO, (WORD)cl);

+	if (fs->fs_type == FS_FAT32) {

+		st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));

+	}

+}

+#endif

+

+

+

+#if _USE_LFN != 0

+/*------------------------------------------------------------------------*/

+/* FAT-LFN: LFN handling                                                  */

+/*------------------------------------------------------------------------*/

+static

+const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30};	/* Offset of LFN characters in the directory entry */

+

+

+/*--------------------------------------------------------*/

+/* FAT-LFN: Compare a part of file name with an LFN entry */

+/*--------------------------------------------------------*/

+static

+int cmp_lfn (				/* 1:matched, 0:not matched */

+	const WCHAR* lfnbuf,	/* Pointer to the LFN working buffer to be compared */

+	BYTE* dir				/* Pointer to the directory entry containing the part of LFN */

+)

+{

+	UINT i, s;

+	WCHAR wc, uc;

+

+

+	if (ld_word(dir + LDIR_FstClusLO) != 0) return 0;	/* Check LDIR_FstClusLO */

+

+	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;	/* Offset in the LFN buffer */

+

+	for (wc = 1, s = 0; s < 13; s++) {		/* Process all characters in the entry */

+		uc = ld_word(dir + LfnOfs[s]);		/* Pick an LFN character */

+		if (wc) {

+			if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) {	/* Compare it */

+				return 0;					/* Not matched */

+			}

+			wc = uc;

+		} else {

+			if (uc != 0xFFFF) return 0;		/* Check filler */

+		}

+	}

+

+	if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0;	/* Last segment matched but different length */

+

+	return 1;		/* The part of LFN matched */

+}

+

+

+#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT

+/*-----------------------------------------------------*/

+/* FAT-LFN: Pick a part of file name from an LFN entry */

+/*-----------------------------------------------------*/

+static

+int pick_lfn (			/* 1:succeeded, 0:buffer overflow or invalid LFN entry */

+	WCHAR* lfnbuf,		/* Pointer to the LFN working buffer */

+	BYTE* dir			/* Pointer to the LFN entry */

+)

+{

+	UINT i, s;

+	WCHAR wc, uc;

+

+

+	if (ld_word(dir + LDIR_FstClusLO) != 0) return 0;	/* Check LDIR_FstClusLO */

+

+	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;	/* Offset in the LFN buffer */

+

+	for (wc = 1, s = 0; s < 13; s++) {		/* Process all characters in the entry */

+		uc = ld_word(dir + LfnOfs[s]);		/* Pick an LFN character */

+		if (wc) {

+			if (i >= _MAX_LFN) return 0;	/* Buffer overflow? */

+			lfnbuf[i++] = wc = uc;			/* Store it */

+		} else {

+			if (uc != 0xFFFF) return 0;		/* Check filler */

+		}

+	}

+

+	if (dir[LDIR_Ord] & LLEF) {				/* Put terminator if it is the last LFN part */

+		if (i >= _MAX_LFN) return 0;		/* Buffer overflow? */

+		lfnbuf[i] = 0;

+	}

+

+	return 1;		/* The part of LFN is valid */

+}

+#endif

+

+

+#if !_FS_READONLY

+/*-----------------------------------------*/

+/* FAT-LFN: Create an entry of LFN entries */

+/*-----------------------------------------*/

+static

+void put_lfn (

+	const WCHAR* lfn,	/* Pointer to the LFN */

+	BYTE* dir,			/* Pointer to the LFN entry to be created */

+	BYTE ord,			/* LFN order (1-20) */

+	BYTE sum			/* Checksum of the corresponding SFN */

+)

+{

+	UINT i, s;

+	WCHAR wc;

+

+

+	dir[LDIR_Chksum] = sum;			/* Set checksum */

+	dir[LDIR_Attr] = AM_LFN;		/* Set attribute. LFN entry */

+	dir[LDIR_Type] = 0;

+	st_word(dir + LDIR_FstClusLO, 0);

+

+	i = (ord - 1) * 13;				/* Get offset in the LFN working buffer */

+	s = wc = 0;

+	do {

+		if (wc != 0xFFFF) wc = lfn[i++];	/* Get an effective character */

+		st_word(dir + LfnOfs[s], wc);		/* Put it */

+		if (wc == 0) wc = 0xFFFF;		/* Padding characters for left locations */

+	} while (++s < 13);

+	if (wc == 0xFFFF || !lfn[i]) ord |= LLEF;	/* Last LFN part is the start of LFN sequence */

+	dir[LDIR_Ord] = ord;			/* Set the LFN order */

+}

+

+#endif	/* !_FS_READONLY */

+#endif	/* _USE_LFN != 0 */

+

+

+

+#if _USE_LFN != 0 && !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* FAT-LFN: Create a Numbered SFN                                        */

+/*-----------------------------------------------------------------------*/

+

+static

+void gen_numname (

+	BYTE* dst,			/* Pointer to the buffer to store numbered SFN */

+	const BYTE* src,	/* Pointer to SFN */

+	const WCHAR* lfn,	/* Pointer to LFN */

+	UINT seq			/* Sequence number */

+)

+{

+	BYTE ns[8], c;

+	UINT i, j;

+	WCHAR wc;

+	DWORD sr;

+

+

+	mem_cpy(dst, src, 11);

+

+	if (seq > 5) {	/* In case of many collisions, generate a hash number instead of sequential number */

+		sr = seq;

+		while (*lfn) {	/* Create a CRC */

+			wc = *lfn++;

+			for (i = 0; i < 16; i++) {

+				sr = (sr << 1) + (wc & 1);

+				wc >>= 1;

+				if (sr & 0x10000) sr ^= 0x11021;

+			}

+		}

+		seq = (UINT)sr;

+	}

+

+	/* itoa (hexdecimal) */

+	i = 7;

+	do {

+		c = (BYTE)((seq % 16) + '0');

+		if (c > '9') c += 7;

+		ns[i--] = c;

+		seq /= 16;

+	} while (seq);

+	ns[i] = '~';

+

+	/* Append the number */

+	for (j = 0; j < i && dst[j] != ' '; j++) {

+		if (IsDBCS1(dst[j])) {

+			if (j == i - 1) break;

+			j++;

+		}

+	}

+	do {

+		dst[j++] = (i < 8) ? ns[i++] : ' ';

+	} while (j < 8);

+}

+#endif	/* _USE_LFN != 0 && !_FS_READONLY */

+

+

+

+#if _USE_LFN != 0

+/*-----------------------------------------------------------------------*/

+/* FAT-LFN: Calculate checksum of an SFN entry                           */

+/*-----------------------------------------------------------------------*/

+

+static

+BYTE sum_sfn (

+	const BYTE* dir		/* Pointer to the SFN entry */

+)

+{

+	BYTE sum = 0;

+	UINT n = 11;

+

+	do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);

+	return sum;

+}

+

+#endif	/* _USE_LFN != 0 */

+

+

+

+#if _FS_EXFAT

+/*-----------------------------------------------------------------------*/

+/* exFAT: Checksum                                                       */

+/*-----------------------------------------------------------------------*/

+

+static

+WORD xdir_sum (			/* Get checksum of the directoly block */

+	const BYTE* dir		/* Directory entry block to be calculated */

+)

+{

+	UINT i, szblk;

+	WORD sum;

+

+

+	szblk = (dir[XDIR_NumSec] + 1) * SZDIRE;

+	for (i = sum = 0; i < szblk; i++) {

+		if (i == XDIR_SetSum) {	/* Skip sum field */

+			i++;

+		} else {

+			sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];

+		}

+	}

+	return sum;

+}

+

+

+

+static

+WORD xname_sum (		/* Get check sum (to be used as hash) of the name */

+	const WCHAR* name	/* File name to be calculated */

+)

+{

+	WCHAR chr;

+	WORD sum = 0;

+

+

+	while ((chr = *name++) != 0) {

+		chr = ff_wtoupper(chr);		/* File name needs to be ignored case */

+		sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);

+		sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);

+	}

+	return sum;

+}

+

+

+#if !_FS_READONLY && _USE_MKFS

+static

+DWORD xsum32 (

+	BYTE  dat,	/* Data to be sumed */

+	DWORD sum	/* Previous value */

+)

+{

+	sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;

+	return sum;

+}

+#endif

+

+

+#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2

+/*------------------------------------------------------*/

+/* exFAT: Get object information from a directory block */

+/*------------------------------------------------------*/

+

+static

+void get_xdir_info (

+	BYTE* dirb,			/* Pointer to the direcotry entry block 85+C0+C1s */

+	FILINFO* fno		/* Buffer to store the extracted file information */

+)

+{

+	UINT di, si;

+	WCHAR w;

+#if !_LFN_UNICODE

+	UINT nc;

+#endif

+

+	/* Get file name */

+#if _LFN_UNICODE

+	if (dirb[XDIR_NumName] <= _MAX_LFN) {

+		for (si = SZDIRE * 2, di = 0; di < dirb[XDIR_NumName]; si += 2, di++) {

+			if ((si % SZDIRE) == 0) si += 2;	/* Skip entry type field */

+			w = ld_word(dirb + si);				/* Get a character */

+			fno->fname[di] = w;					/* Store it */

+		}

+	} else {

+		di = 0;	/* Buffer overflow and inaccessible object */

+	}

+#else

+	for (si = SZDIRE * 2, di = nc = 0; nc < dirb[XDIR_NumName]; si += 2, nc++) {

+		if ((si % SZDIRE) == 0) si += 2;	/* Skip entry type field */

+		w = ld_word(dirb + si);				/* Get a character */

+		w = ff_convert(w, 0);				/* Unicode -> OEM */

+		if (w == 0) { di = 0; break; }		/* Could not be converted and inaccessible object */

+		if (_DF1S && w >= 0x100) {			/* Put 1st byte if it is a DBC (always false at SBCS cfg) */

+			fno->fname[di++] = (char)(w >> 8);

+		}

+		if (di >= _MAX_LFN) { di = 0; break; }	/* Buffer overflow and inaccessible object */

+		fno->fname[di++] = (char)w;

+	}

+#endif

+	if (di == 0) fno->fname[di++] = '?';	/* Inaccessible object? */

+	fno->fname[di] = 0;						/* Terminate file name */

+

+	fno->altname[0] = 0;							/* No SFN */

+	fno->fattrib = dirb[XDIR_Attr];					/* Attribute */

+	fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize);	/* Size */

+	fno->ftime = ld_word(dirb + XDIR_ModTime + 0);	/* Time */

+	fno->fdate = ld_word(dirb + XDIR_ModTime + 2);	/* Date */

+}

+

+#endif	/* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */

+

+

+/*-----------------------------------*/

+/* exFAT: Get a directry entry block */

+/*-----------------------------------*/

+

+static

+FRESULT load_xdir (	/* FR_INT_ERR: invalid entry block */

+	DIR* dp			/* Pointer to the reading direcotry object pointing the 85 entry */

+)

+{

+	FRESULT res;

+	UINT i, nent;

+	BYTE* dirb = dp->obj.fs->dirbuf;	/* Pointer to the on-memory direcotry entry block 85+C0+C1s */

+

+

+	/* Load 85 entry */

+	res = move_window(dp->obj.fs, dp->sect);

+	if (res != FR_OK) return res;

+	if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR;

+	mem_cpy(dirb, dp->dir, SZDIRE);

+	nent = dirb[XDIR_NumSec] + 1;

+

+	/* Load C0 entry */

+	res = dir_next(dp, 0);

+	if (res != FR_OK) return res;

+	res = move_window(dp->obj.fs, dp->sect);

+	if (res != FR_OK) return res;

+	if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR;

+	mem_cpy(dirb + SZDIRE, dp->dir, SZDIRE);

+

+	/* Load C1 entries */

+	if (nent < 3 || nent > 19) return FR_NO_FILE;

+	i = SZDIRE * 2; nent *= SZDIRE;

+	do {

+		res = dir_next(dp, 0);

+		if (res != FR_OK) return res;

+		res = move_window(dp->obj.fs, dp->sect);

+		if (res != FR_OK) return res;

+		if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR;

+		mem_cpy(dirb + i, dp->dir, SZDIRE);

+		i += SZDIRE;

+	} while (i < nent);

+

+	/* Sanity check */

+	if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;

+

+	return FR_OK;

+}

+

+

+#if !_FS_READONLY || _FS_RPATH != 0 

+/*------------------------------------------------*/

+/* exFAT: Load the object's directory entry block */

+/*------------------------------------------------*/

+static

+FRESULT load_obj_dir (	

+	DIR* dp,			/* Blank directory object to be used to access containing direcotry */

+	const _FDID* obj	/* Object with containing directory information */

+)

+{

+	FRESULT res;

+

+

+	/* Open object containing directory */

+	dp->obj.fs = obj->fs;

+	dp->obj.sclust = obj->c_scl;

+	dp->obj.stat = (BYTE)obj->c_size;

+	dp->obj.objsize = obj->c_size & 0xFFFFFF00;

+	dp->blk_ofs = obj->c_ofs;

+

+	res = dir_sdi(dp, dp->blk_ofs);	/* Goto the block location */

+	if (res == FR_OK) {

+		res = load_xdir(dp);		/* Load the object's entry block */

+	}

+	return res;

+}

+#endif

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------*/

+/* exFAT: Store the directory block to the media */

+/*-----------------------------------------------*/

+static

+FRESULT store_xdir (

+	DIR* dp				/* Pointer to the direcotry object */

+)

+{

+	FRESULT res;

+	UINT nent;

+	BYTE* dirb = dp->obj.fs->dirbuf;	/* Pointer to the direcotry entry block 85+C0+C1s */

+

+	/* Create set sum */

+	st_word(dirb + XDIR_SetSum, xdir_sum(dirb));

+	nent = dirb[XDIR_NumSec] + 1;

+

+	/* Store the set of directory to the volume */

+	res = dir_sdi(dp, dp->blk_ofs);

+	while (res == FR_OK) {

+		res = move_window(dp->obj.fs, dp->sect);

+		if (res != FR_OK) break;

+		mem_cpy(dp->dir, dirb, SZDIRE);

+		dp->obj.fs->wflag = 1;

+		if (--nent == 0) break;

+		dirb += SZDIRE;

+		res = dir_next(dp, 0);

+	}

+	return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;

+}

+

+

+

+/*-------------------------------------------*/

+/* exFAT: Create a new directory enrty block */

+/*-------------------------------------------*/

+

+static

+void create_xdir (

+	BYTE* dirb,			/* Pointer to the direcotry entry block buffer */

+	const WCHAR* lfn	/* Pointer to the nul terminated file name */

+)

+{

+	UINT i;

+	BYTE nb, nc;

+	WCHAR chr;

+

+

+	mem_set(dirb, 0, 2 * SZDIRE);			/* Initialize 85+C0 entry */

+	dirb[XDIR_Type] = 0x85;

+	dirb[XDIR_Type + SZDIRE] = 0xC0;

+	st_word(dirb + XDIR_NameHash, xname_sum(lfn));	/* Set name hash */

+

+	i = SZDIRE * 2;	/* C1 offset */

+	nc = 0; nb = 1; chr = 1;

+	do {

+		dirb[i++] = 0xC1; dirb[i++] = 0;	/* Entry type C1 */

+		do {	/* Fill name field */

+			if (chr && (chr = lfn[nc]) != 0) nc++;	/* Get a character if exist */

+			st_word(dirb + i, chr); i += 2;	/* Store it */

+		} while (i % SZDIRE);

+		nb++;

+	} while (lfn[nc]);	/* Fill next entry if any char follows */

+

+	dirb[XDIR_NumName] = nc;	/* Set name length */

+	dirb[XDIR_NumSec] = nb;		/* Set number of C0+C1s */

+}

+

+#endif	/* !_FS_READONLY */

+#endif	/* _FS_EXFAT */

+

+

+

+#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT

+/*-----------------------------------------------------------------------*/

+/* Read an object from the directory                                     */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT dir_read (

+	DIR* dp,		/* Pointer to the directory object */

+	int vol			/* Filtered by 0:file/directory or 1:volume label */

+)

+{

+	FRESULT res = FR_NO_FILE;

+	FATFS *fs = dp->obj.fs;

+	BYTE a, c;

+#if _USE_LFN != 0

+	BYTE ord = 0xFF, sum = 0xFF;

+#endif

+

+	while (dp->sect) {

+		res = move_window(fs, dp->sect);

+		if (res != FR_OK) break;

+		c = dp->dir[DIR_Name];	/* Test for the entry type */

+		if (c == 0) { res = FR_NO_FILE; break; }	/* Reached to end of the directory */

+#if _FS_EXFAT

+		if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+			if (_USE_LABEL && vol) {

+				if (c == 0x83) break;	/* Volume label entry? */

+			} else {

+				if (c == 0x85) {		/* Start of the file entry block? */

+					dp->blk_ofs = dp->dptr;	/* Get location of the block */

+					res = load_xdir(dp);	/* Load the entry block */

+					if (res == FR_OK) {

+						dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK;	/* Get attribute */

+					}

+					break;

+				}

+			}

+		} else

+#endif

+		{	/* On the FAT12/16/32 volume */

+			dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;	/* Get attribute */

+#if _USE_LFN != 0	/* LFN configuration */

+			if (c == DDEM || c == '.' || (int)((a & ~AM_ARC) == AM_VOL) != vol) {	/* An entry without valid data */

+				ord = 0xFF;

+			} else {

+				if (a == AM_LFN) {			/* An LFN entry is found */

+					if (c & LLEF) {			/* Is it start of an LFN sequence? */

+						sum = dp->dir[LDIR_Chksum];

+						c &= (BYTE)~LLEF; ord = c;

+						dp->blk_ofs = dp->dptr;

+					}

+					/* Check LFN validity and capture it */

+					ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;

+				} else {					/* An SFN entry is found */

+					if (ord || sum != sum_sfn(dp->dir)) {	/* Is there a valid LFN? */

+						dp->blk_ofs = 0xFFFFFFFF;			/* It has no LFN. */

+					}

+					break;

+				}

+			}

+#else		/* Non LFN configuration */

+			if (c != DDEM && c != '.' && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) {	/* Is it a valid entry? */

+				break;

+			}

+#endif

+		}

+		res = dir_next(dp, 0);		/* Next entry */

+		if (res != FR_OK) break;

+	}

+

+	if (res != FR_OK) dp->sect = 0;		/* Terminate the read operation on error or EOT */

+	return res;

+}

+

+#endif	/* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Find an object in the directory                  */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT dir_find (	/* FR_OK(0):succeeded, !=0:error */

+	DIR* dp			/* Pointer to the directory object with the file name */

+)

+{

+	FRESULT res;

+	FATFS *fs = dp->obj.fs;

+	BYTE c;

+#if _USE_LFN != 0

+	BYTE a, ord, sum;

+#endif

+

+	res = dir_sdi(dp, 0);			/* Rewind directory object */

+	if (res != FR_OK) return res;

+#if _FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		BYTE nc;

+		UINT di, ni;

+		WORD hash = xname_sum(fs->lfnbuf);		/* Hash value of the name to find */

+

+		while ((res = dir_read(dp, 0)) == FR_OK) {	/* Read an item */

+			if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue;	/* Skip the comparison if hash value mismatched */

+			for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) {	/* Compare the name */

+				if ((di % SZDIRE) == 0) di += 2;

+				if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;

+			}

+			if (nc == 0 && !fs->lfnbuf[ni]) break;	/* Name matched? */

+		}

+		return res;

+	}

+#endif

+	/* On the FAT12/16/32 volume */

+#if _USE_LFN != 0

+	ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF;	/* Reset LFN sequence */

+#endif

+	do {

+		res = move_window(fs, dp->sect);

+		if (res != FR_OK) break;

+		c = dp->dir[DIR_Name];

+		if (c == 0) { res = FR_NO_FILE; break; }	/* Reached to end of table */

+#if _USE_LFN != 0	/* LFN configuration */

+		dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;

+		if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) {	/* An entry without valid data */

+			ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF;	/* Reset LFN sequence */

+		} else {

+			if (a == AM_LFN) {			/* An LFN entry is found */

+				if (!(dp->fn[NSFLAG] & NS_NOLFN)) {

+					if (c & LLEF) {		/* Is it start of LFN sequence? */

+						sum = dp->dir[LDIR_Chksum];

+						c &= (BYTE)~LLEF; ord = c;	/* LFN start order */

+						dp->blk_ofs = dp->dptr;	/* Start offset of LFN */

+					}

+					/* Check validity of the LFN entry and compare it with given name */

+					ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;

+				}

+			} else {					/* An SFN entry is found */

+				if (!ord && sum == sum_sfn(dp->dir)) break;	/* LFN matched? */

+				if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break;	/* SFN matched? */

+				ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF;	/* Reset LFN sequence */

+			}

+		}

+#else		/* Non LFN configuration */

+		dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;

+		if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break;	/* Is it a valid entry? */

+#endif

+		res = dir_next(dp, 0);	/* Next entry */

+	} while (res == FR_OK);

+

+	return res;

+}

+

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Register an object to the directory                                   */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT dir_register (	/* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */

+	DIR* dp				/* Target directory with object name to be created */

+)

+{

+	FRESULT res;

+	FATFS *fs = dp->obj.fs;

+#if _USE_LFN != 0	/* LFN configuration */

+	UINT n, nlen, nent;

+	BYTE sn[12], sum;

+

+

+	if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME;	/* Check name validity */

+	for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ;	/* Get lfn length */

+

+#if _FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		DIR dj;

+

+		nent = (nlen + 14) / 15 + 2;	/* Number of entries to allocate (85+C0+C1s) */

+		res = dir_alloc(dp, nent);		/* Allocate entries */

+		if (res != FR_OK) return res;

+		dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1);			/* Set block position */

+

+		if (dp->obj.sclust != 0 && (dp->obj.stat & 4)) {	/* Has the sub-directory been stretched? */

+			dp->obj.stat &= 3;

+			dp->obj.objsize += (DWORD)fs->csize * SS(fs);	/* Increase object size by cluster size */

+			res = fill_fat_chain(&dp->obj);	/* Complement FAT chain if needed */

+			if (res != FR_OK) return res;

+			res = load_obj_dir(&dj, &dp->obj);

+			if (res != FR_OK) return res;	/* Load the object status */

+			st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize);		/* Update the allocation status */

+			st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);

+			fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1;

+			res = store_xdir(&dj);			/* Store the object status */

+			if (res != FR_OK) return res;

+		}

+

+		create_xdir(fs->dirbuf, fs->lfnbuf);	/* Create on-memory directory block to be written later */

+		return FR_OK;

+	}

+#endif

+	/* On the FAT12/16/32 volume */

+	mem_cpy(sn, dp->fn, 12);

+	if (sn[NSFLAG] & NS_LOSS) {			/* When LFN is out of 8.3 format, generate a numbered name */

+		dp->fn[NSFLAG] = NS_NOLFN;		/* Find only SFN */

+		for (n = 1; n < 100; n++) {

+			gen_numname(dp->fn, sn, fs->lfnbuf, n);	/* Generate a numbered name */

+			res = dir_find(dp);				/* Check if the name collides with existing SFN */

+			if (res != FR_OK) break;

+		}

+		if (n == 100) return FR_DENIED;		/* Abort if too many collisions */

+		if (res != FR_NO_FILE) return res;	/* Abort if the result is other than 'not collided' */

+		dp->fn[NSFLAG] = sn[NSFLAG];

+	}

+

+	/* Create an SFN with/without LFNs. */

+	nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1;	/* Number of entries to allocate */

+	res = dir_alloc(dp, nent);		/* Allocate entries */

+	if (res == FR_OK && --nent) {	/* Set LFN entry if needed */

+		res = dir_sdi(dp, dp->dptr - nent * SZDIRE);

+		if (res == FR_OK) {

+			sum = sum_sfn(dp->fn);	/* Checksum value of the SFN tied to the LFN */

+			do {					/* Store LFN entries in bottom first */

+				res = move_window(fs, dp->sect);

+				if (res != FR_OK) break;

+				put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum);

+				fs->wflag = 1;

+				res = dir_next(dp, 0);	/* Next entry */

+			} while (res == FR_OK && --nent);

+		}

+	}

+

+#else	/* Non LFN configuration */

+	res = dir_alloc(dp, 1);		/* Allocate an entry for SFN */

+

+#endif

+

+	/* Set SFN entry */

+	if (res == FR_OK) {

+		res = move_window(fs, dp->sect);

+		if (res == FR_OK) {

+			mem_set(dp->dir, 0, SZDIRE);	/* Clean the entry */

+			mem_cpy(dp->dir + DIR_Name, dp->fn, 11);	/* Put SFN */

+#if _USE_LFN != 0

+			dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT);	/* Put NT flag */

+#endif

+			fs->wflag = 1;

+		}

+	}

+

+	return res;

+}

+

+#endif /* !_FS_READONLY */

+

+

+

+#if !_FS_READONLY && _FS_MINIMIZE == 0

+/*-----------------------------------------------------------------------*/

+/* Remove an object from the directory                                   */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT dir_remove (	/* FR_OK:Succeeded, FR_DISK_ERR:A disk error */

+	DIR* dp				/* Directory object pointing the entry to be removed */

+)

+{

+	FRESULT res;

+	FATFS *fs = dp->obj.fs;

+#if _USE_LFN != 0	/* LFN configuration */

+	DWORD last = dp->dptr;

+

+	res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs);	/* Goto top of the entry block if LFN is exist */

+	if (res == FR_OK) {

+		do {

+			res = move_window(fs, dp->sect);

+			if (res != FR_OK) break;

+			/* Mark an entry 'deleted' */

+			if (_FS_EXFAT && fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+				dp->dir[XDIR_Type] &= 0x7F;

+			} else {									/* On the FAT12/16/32 volume */

+				dp->dir[DIR_Name] = DDEM;

+			}

+			fs->wflag = 1;

+			if (dp->dptr >= last) break;	/* If reached last entry then all entries of the object has been deleted. */

+			res = dir_next(dp, 0);	/* Next entry */

+		} while (res == FR_OK);

+		if (res == FR_NO_FILE) res = FR_INT_ERR;

+	}

+#else			/* Non LFN configuration */

+

+	res = move_window(fs, dp->sect);

+	if (res == FR_OK) {

+		dp->dir[DIR_Name] = DDEM;

+		fs->wflag = 1;

+	}

+#endif

+

+	return res;

+}

+

+#endif /* !_FS_READONLY && _FS_MINIMIZE == 0 */

+

+

+

+#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2

+/*-----------------------------------------------------------------------*/

+/* Get file information from directory entry                             */

+/*-----------------------------------------------------------------------*/

+

+static

+void get_fileinfo (		/* No return code */

+	DIR* dp,			/* Pointer to the directory object */

+	FILINFO* fno	 	/* Pointer to the file information to be filled */

+)

+{

+	UINT i, j;

+	TCHAR c;

+	DWORD tm;

+#if _USE_LFN != 0

+	WCHAR w, lfv;

+	FATFS *fs = dp->obj.fs;

+#endif

+

+

+	fno->fname[0] = 0;		/* Invaidate file info */

+	if (!dp->sect) return;	/* Exit if read pointer has reached end of directory */

+

+#if _USE_LFN != 0	/* LFN configuration */

+#if _FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		get_xdir_info(fs->dirbuf, fno);

+		return;

+	} else

+#endif

+	{	/* On the FAT12/16/32 volume */

+		if (dp->blk_ofs != 0xFFFFFFFF) {	/* Get LFN if available */

+			i = j = 0;

+			while ((w = fs->lfnbuf[j++]) != 0) {	/* Get an LFN character */

+#if !_LFN_UNICODE

+				w = ff_convert(w, 0);		/* Unicode -> OEM */

+				if (w == 0) { i = 0; break; }	/* No LFN if it could not be converted */

+				if (_DF1S && w >= 0x100) {	/* Put 1st byte if it is a DBC (always false at SBCS cfg) */

+					fno->fname[i++] = (char)(w >> 8);

+				}

+#endif

+				if (i >= _MAX_LFN) { i = 0; break; }	/* No LFN if buffer overflow */

+				fno->fname[i++] = (TCHAR)w;

+			}

+			fno->fname[i] = 0;	/* Terminate the LFN */

+		}

+	}

+

+	i = j = 0;

+	lfv = fno->fname[i];	/* LFN is exist if non-zero */

+	while (i < 11) {		/* Copy name body and extension */

+		c = (TCHAR)dp->dir[i++];

+		if (c == ' ') continue;				/* Skip padding spaces */

+		if (c == RDDEM) c = (TCHAR)DDEM;	/* Restore replaced DDEM character */

+		if (i == 9) {						/* Insert a . if extension is exist */

+			if (!lfv) fno->fname[j] = '.';

+			fno->altname[j++] = '.';

+		}

+#if _LFN_UNICODE

+		if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dp->dir[i])) {

+			c = c << 8 | dp->dir[i++];

+		}

+		c = ff_convert(c, 1);	/* OEM -> Unicode */

+		if (!c) c = '?';

+#endif

+		fno->altname[j] = c;

+		if (!lfv) {

+			if (IsUpper(c) && (dp->dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) {

+				c += 0x20;			/* To lower */

+			}

+			fno->fname[j] = c;

+		}

+		j++;

+	}

+	if (!lfv) {

+		fno->fname[j] = 0;

+		if (!dp->dir[DIR_NTres]) j = 0;	/* Altname is no longer needed if neither LFN nor case info is exist. */

+	}

+	fno->altname[j] = 0;	/* Terminate the SFN */

+

+#else	/* Non-LFN configuration */

+	i = j = 0;

+	while (i < 11) {		/* Copy name body and extension */

+		c = (TCHAR)dp->dir[i++];

+		if (c == ' ') continue;				/* Skip padding spaces */

+		if (c == RDDEM) c = (TCHAR)DDEM;	/* Restore replaced DDEM character */

+		if (i == 9) fno->fname[j++] = '.';	/* Insert a . if extension is exist */

+		fno->fname[j++] = c;

+	}

+	fno->fname[j] = 0;

+#endif

+

+	fno->fattrib = dp->dir[DIR_Attr];				/* Attribute */

+	fno->fsize = ld_dword(dp->dir + DIR_FileSize);	/* Size */

+	tm = ld_dword(dp->dir + DIR_ModTime);			/* Timestamp */

+	fno->ftime = (WORD)tm; fno->fdate = (WORD)(tm >> 16);

+}

+

+#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */

+

+

+

+#if _USE_FIND && _FS_MINIMIZE <= 1

+/*-----------------------------------------------------------------------*/

+/* Pattern matching                                                      */

+/*-----------------------------------------------------------------------*/

+

+static

+WCHAR get_achar (		/* Get a character and advances ptr 1 or 2 */

+	const TCHAR** ptr	/* Pointer to pointer to the SBCS/DBCS/Unicode string */

+)

+{

+#if !_LFN_UNICODE

+	WCHAR chr;

+

+	chr = (BYTE)*(*ptr)++;					/* Get a byte */

+	if (IsLower(chr)) chr -= 0x20;			/* To upper ASCII char */

+#ifdef _EXCVT

+	if (chr >= 0x80) chr = ExCvt[chr - 0x80];	/* To upper SBCS extended char */

+#else

+	if (IsDBCS1(chr) && IsDBCS2(**ptr)) {		/* Get DBC 2nd byte if needed */

+		chr = chr << 8 | (BYTE)*(*ptr)++;

+	}

+#endif

+	return chr;

+#else

+	return ff_wtoupper(*(*ptr)++);			/* Get a word and to upper */

+#endif

+}

+

+

+static

+int pattern_matching (	/* 0:not matched, 1:matched */

+	const TCHAR* pat,	/* Matching pattern */

+	const TCHAR* nam,	/* String to be tested */

+	int skip,			/* Number of pre-skip chars (number of ?s) */

+	int inf				/* Infinite search (* specified) */

+)

+{

+	const TCHAR *pp, *np;

+	WCHAR pc, nc;

+	int nm, nx;

+

+

+	while (skip--) {				/* Pre-skip name chars */

+		if (!get_achar(&nam)) return 0;	/* Branch mismatched if less name chars */

+	}

+	if (!*pat && inf) return 1;		/* (short circuit) */

+

+	do {

+		pp = pat; np = nam;			/* Top of pattern and name to match */

+		for (;;) {

+			if (*pp == '?' || *pp == '*') {	/* Wildcard? */

+				nm = nx = 0;

+				do {				/* Analyze the wildcard chars */

+					if (*pp++ == '?') nm++; else nx = 1;

+				} while (*pp == '?' || *pp == '*');

+				if (pattern_matching(pp, np, nm, nx)) return 1;	/* Test new branch (recurs upto number of wildcard blocks in the pattern) */

+				nc = *np; break;	/* Branch mismatched */

+			}

+			pc = get_achar(&pp);	/* Get a pattern char */

+			nc = get_achar(&np);	/* Get a name char */

+			if (pc != nc) break;	/* Branch mismatched? */

+			if (pc == 0) return 1;	/* Branch matched? (matched at end of both strings) */

+		}

+		get_achar(&nam);			/* nam++ */

+	} while (inf && nc);			/* Retry until end of name if infinite search is specified */

+

+	return 0;

+}

+

+#endif /* _USE_FIND && _FS_MINIMIZE <= 1 */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Pick a top segment and create the object name in directory form       */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT create_name (	/* FR_OK: successful, FR_INVALID_NAME: could not create */

+	DIR* dp,			/* Pointer to the directory object */

+	const TCHAR** path	/* Pointer to pointer to the segment in the path string */

+)

+{

+#if _USE_LFN != 0	/* LFN configuration */

+	BYTE b, cf;

+	WCHAR w, *lfn;

+	UINT i, ni, si, di;

+	const TCHAR *p;

+

+	/* Create LFN in Unicode */

+	p = *path; lfn = dp->obj.fs->lfnbuf; si = di = 0;

+	for (;;) {

+		w = p[si++];					/* Get a character */

+		if (w < ' ') break;				/* Break if end of the path name */

+		if (w == '/' || w == '\\') {	/* Break if a separator is found */

+			while (p[si] == '/' || p[si] == '\\') si++;	/* Skip duplicated separator if exist */

+			break;

+		}

+		if (di >= _MAX_LFN) return FR_INVALID_NAME;	/* Reject too long name */

+#if !_LFN_UNICODE

+		w &= 0xFF;

+		if (IsDBCS1(w)) {				/* Check if it is a DBC 1st byte (always false on SBCS cfg) */

+			b = (BYTE)p[si++];			/* Get 2nd byte */

+			w = (w << 8) + b;			/* Create a DBC */

+			if (!IsDBCS2(b)) return FR_INVALID_NAME;	/* Reject invalid sequence */

+		}

+		w = ff_convert(w, 1);			/* Convert ANSI/OEM to Unicode */

+		if (!w) return FR_INVALID_NAME;	/* Reject invalid code */

+#endif

+		if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) return FR_INVALID_NAME;	/* Reject illegal characters for LFN */

+		lfn[di++] = w;					/* Store the Unicode character */

+	}

+	*path = &p[si];						/* Return pointer to the next segment */

+	cf = (w < ' ') ? NS_LAST : 0;		/* Set last segment flag if end of the path */

+#if _FS_RPATH != 0

+	if ((di == 1 && lfn[di - 1] == '.') ||

+		(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {	/* Is this segment a dot name? */

+		lfn[di] = 0;

+		for (i = 0; i < 11; i++)		/* Create dot name for SFN entry */

+			dp->fn[i] = (i < di) ? '.' : ' ';

+		dp->fn[i] = cf | NS_DOT;		/* This is a dot entry */

+		return FR_OK;

+	}

+#endif

+	while (di) {						/* Snip off trailing spaces and dots if exist */

+		w = lfn[di - 1];

+		if (w != ' ' && w != '.') break;

+		di--;

+	}

+	lfn[di] = 0;						/* LFN is created */

+	if (di == 0) return FR_INVALID_NAME;	/* Reject nul name */

+

+	/* Create SFN in directory form */

+	mem_set(dp->fn, ' ', 11);

+	for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ;	/* Strip leading spaces and dots */

+	if (si) cf |= NS_LOSS | NS_LFN;

+	while (di && lfn[di - 1] != '.') di--;	/* Find extension (di<=si: no extension) */

+

+	i = b = 0; ni = 8;

+	for (;;) {

+		w = lfn[si++];					/* Get an LFN character */

+		if (!w) break;					/* Break on end of the LFN */

+		if (w == ' ' || (w == '.' && si != di)) {	/* Remove spaces and dots */

+			cf |= NS_LOSS | NS_LFN; continue;

+		}

+

+		if (i >= ni || si == di) {		/* Extension or end of SFN */

+			if (ni == 11) {				/* Long extension */

+				cf |= NS_LOSS | NS_LFN; break;

+			}

+			if (si != di) cf |= NS_LOSS | NS_LFN;	/* Out of 8.3 format */

+			if (si > di) break;			/* No extension */

+			si = di; i = 8; ni = 11;	/* Enter extension section */

+			b <<= 2; continue;

+		}

+

+		if (w >= 0x80) {				/* Non ASCII character */

+#ifdef _EXCVT

+			w = ff_convert(w, 0);		/* Unicode -> OEM code */

+			if (w) w = ExCvt[w - 0x80];	/* Convert extended character to upper (SBCS) */

+#else

+			w = ff_convert(ff_wtoupper(w), 0);	/* Upper converted Unicode -> OEM code */

+#endif

+			cf |= NS_LFN;				/* Force create LFN entry */

+		}

+

+		if (_DF1S && w >= 0x100) {		/* Is this DBC? (always false at SBCS cfg) */

+			if (i >= ni - 1) {

+				cf |= NS_LOSS | NS_LFN; i = ni; continue;

+			}

+			dp->fn[i++] = (BYTE)(w >> 8);

+		} else {						/* SBC */

+			if (!w || chk_chr("+,;=[]", w)) {	/* Replace illegal characters for SFN */

+				w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */

+			} else {

+				if (IsUpper(w)) {		/* ASCII large capital */

+					b |= 2;

+				} else {

+					if (IsLower(w)) {	/* ASCII small capital */

+						b |= 1; w -= 0x20;

+					}

+				}

+			}

+		}

+		dp->fn[i++] = (BYTE)w;

+	}

+

+	if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM;	/* If the first character collides with DDEM, replace it with RDDEM */

+

+	if (ni == 8) b <<= 2;

+	if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN;	/* Create LFN entry when there are composite capitals */

+	if (!(cf & NS_LFN)) {						/* When LFN is in 8.3 format without extended character, NT flags are created */

+		if ((b & 0x03) == 0x01) cf |= NS_EXT;	/* NT flag (Extension has only small capital) */

+		if ((b & 0x0C) == 0x04) cf |= NS_BODY;	/* NT flag (Filename has only small capital) */

+	}

+

+	dp->fn[NSFLAG] = cf;	/* SFN is created */

+

+	return FR_OK;

+

+

+#else	/* _USE_LFN != 0 : Non-LFN configuration */

+	BYTE c, d, *sfn;

+	UINT ni, si, i;

+	const char *p;

+

+	/* Create file name in directory form */

+	p = *path; sfn = dp->fn;

+	mem_set(sfn, ' ', 11);

+	si = i = 0; ni = 8;

+#if _FS_RPATH != 0

+	if (p[si] == '.') { /* Is this a dot entry? */

+		for (;;) {

+			c = (BYTE)p[si++];

+			if (c != '.' || si >= 3) break;

+			sfn[i++] = c;

+		}

+		if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;

+		*path = p + si;								/* Return pointer to the next segment */

+		sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT;	/* Set last segment flag if end of the path */

+		return FR_OK;

+	}

+#endif

+	for (;;) {

+		c = (BYTE)p[si++];

+		if (c <= ' ') break; 			/* Break if end of the path name */

+		if (c == '/' || c == '\\') {	/* Break if a separator is found */

+			while (p[si] == '/' || p[si] == '\\') si++;	/* Skip duplicated separator if exist */

+			break;

+		}

+		if (c == '.' || i >= ni) {		/* End of body or over size? */

+			if (ni == 11 || c != '.') return FR_INVALID_NAME;	/* Over size or invalid dot */

+			i = 8; ni = 11;				/* Goto extension */

+			continue;

+		}

+		if (c >= 0x80) {				/* Extended character? */

+#ifdef _EXCVT

+			c = ExCvt[c - 0x80];		/* To upper extended characters (SBCS cfg) */

+#else

+#if !_DF1S

+			return FR_INVALID_NAME;		/* Reject extended characters (ASCII only cfg) */

+#endif

+#endif

+		}

+		if (IsDBCS1(c)) {				/* Check if it is a DBC 1st byte (always false at SBCS cfg.) */

+			d = (BYTE)p[si++];			/* Get 2nd byte */

+			if (!IsDBCS2(d) || i >= ni - 1) return FR_INVALID_NAME;	/* Reject invalid DBC */

+			sfn[i++] = c;

+			sfn[i++] = d;

+		} else {						/* SBC */

+			if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME;	/* Reject illegal chrs for SFN */

+			if (IsLower(c)) c -= 0x20;	/* To upper */

+			sfn[i++] = c;

+		}

+	}

+	*path = p + si;						/* Return pointer to the next segment */

+	if (i == 0) return FR_INVALID_NAME;	/* Reject nul string */

+

+	if (sfn[0] == DDEM) sfn[0] = RDDEM;	/* If the first character collides with DDEM, replace it with RDDEM */

+	sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0;		/* Set last segment flag if end of the path */

+

+	return FR_OK;

+#endif /* _USE_LFN != 0 */

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Follow a file path                                                    */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT follow_path (	/* FR_OK(0): successful, !=0: error code */

+	DIR* dp,			/* Directory object to return last directory and found object */

+	const TCHAR* path	/* Full-path string to find a file or directory */

+)

+{

+	FRESULT res;

+	BYTE ns;

+	_FDID *obj = &dp->obj;

+	FATFS *fs = obj->fs;

+

+

+#if _FS_RPATH != 0

+	if (*path != '/' && *path != '\\') {	/* Without heading separator */

+		obj->sclust = fs->cdir;				/* Start from the current directory */

+	} else

+#endif

+	{										/* With heading separator */

+		while (*path == '/' || *path == '\\') path++;	/* Strip heading separator */

+		obj->sclust = 0;					/* Start from the root directory */

+	}

+#if _FS_EXFAT && _FS_RPATH != 0

+	if (fs->fs_type == FS_EXFAT && obj->sclust) {	/* Retrieve the sub-directory status if needed */

+		DIR dj;

+

+		obj->c_scl = fs->cdc_scl;

+		obj->c_size = fs->cdc_size;

+		obj->c_ofs = fs->cdc_ofs;

+		res = load_obj_dir(&dj, obj);

+		if (res != FR_OK) return res;

+		obj->objsize = ld_dword(fs->dirbuf + XDIR_FileSize);

+		obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;

+	}

+#endif

+

+	if ((UINT)*path < ' ') {				/* Null path name is the origin directory itself */

+		dp->fn[NSFLAG] = NS_NONAME;

+		res = dir_sdi(dp, 0);

+

+	} else {								/* Follow path */

+		for (;;) {

+			res = create_name(dp, &path);	/* Get a segment name of the path */

+			if (res != FR_OK) break;

+			res = dir_find(dp);				/* Find an object with the segment name */

+			ns = dp->fn[NSFLAG];

+			if (res != FR_OK) {				/* Failed to find the object */

+				if (res == FR_NO_FILE) {	/* Object is not found */

+					if (_FS_RPATH && (ns & NS_DOT)) {	/* If dot entry is not exist, stay there */

+						if (!(ns & NS_LAST)) continue;	/* Continue to follow if not last segment */

+						dp->fn[NSFLAG] = NS_NONAME;

+						res = FR_OK;

+					} else {							/* Could not find the object */

+						if (!(ns & NS_LAST)) res = FR_NO_PATH;	/* Adjust error code if not last segment */

+					}

+				}

+				break;

+			}

+			if (ns & NS_LAST) break;			/* Last segment matched. Function completed. */

+			/* Get into the sub-directory */

+			if (!(obj->attr & AM_DIR)) {		/* It is not a sub-directory and cannot follow */

+				res = FR_NO_PATH; break;

+			}

+#if _FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				obj->c_scl = obj->sclust;		/* Save containing directory information for next dir */

+				obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat;

+				obj->c_ofs = dp->blk_ofs;

+				obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus);	/* Open next directory */

+				obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;

+				obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize);

+			} else

+#endif

+			{

+				obj->sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs));	/* Open next directory */

+			}

+		}

+	}

+

+	return res;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Get logical drive number from path name                               */

+/*-----------------------------------------------------------------------*/

+

+static

+int get_ldnumber (		/* Returns logical drive number (-1:invalid drive) */

+	const TCHAR** path	/* Pointer to pointer to the path name */

+)

+{

+	const TCHAR *tp, *tt;

+	UINT i;

+	int vol = -1;

+#if _STR_VOLUME_ID		/* Find string drive id */

+	static const char* const str[] = {_VOLUME_STRS};

+	const char *sp;

+	char c;

+	TCHAR tc;

+#endif

+

+

+	if (*path) {	/* If the pointer is not a null */

+		for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ;	/* Find ':' in the path */

+		if (*tt == ':') {	/* If a ':' is exist in the path name */

+			tp = *path;

+			i = *tp++ - '0'; 

+			if (i < 10 && tp == tt) {	/* Is there a numeric drive id? */

+				if (i < _VOLUMES) {	/* If a drive id is found, get the value and strip it */

+					vol = (int)i;

+					*path = ++tt;

+				}

+			}

+#if _STR_VOLUME_ID

+			 else {	/* No numeric drive number, find string drive id */

+				i = 0; tt++;

+				do {

+					sp = str[i]; tp = *path;

+					do {	/* Compare a string drive id with path name */

+						c = *sp++; tc = *tp++;

+						if (IsLower(tc)) tc -= 0x20;

+					} while (c && (TCHAR)c == tc);

+				} while ((c || tp != tt) && ++i < _VOLUMES);	/* Repeat for each id until pattern match */

+				if (i < _VOLUMES) {	/* If a drive id is found, get the value and strip it */

+					vol = (int)i;

+					*path = tt;

+				}

+			}

+#endif

+			return vol;

+		}

+#if _FS_RPATH != 0 && _VOLUMES >= 2

+		vol = CurrVol;	/* Current drive */

+#else

+		vol = 0;		/* Drive 0 */

+#endif

+	}

+	return vol;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Load a sector and check if it is an FAT boot sector                   */

+/*-----------------------------------------------------------------------*/

+

+static

+BYTE check_fs (	/* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */

+	FATFS* fs,	/* File system object */

+	DWORD sect	/* Sector# (lba) to check if it is an FAT-VBR or not */

+)

+{

+	fs->wflag = 0; fs->winsect = 0xFFFFFFFF;		/* Invaidate window */

+	if (move_window(fs, sect) != FR_OK) return 4;	/* Load boot record */

+

+	if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3;	/* Check boot record signature (always placed at offset 510 even if the sector size is >512) */

+

+	if (fs->win[BS_JmpBoot] == 0xE9 || (fs->win[BS_JmpBoot] == 0xEB && fs->win[BS_JmpBoot + 2] == 0x90)) {

+		if ((ld_dword(fs->win + BS_FilSysType) & 0xFFFFFF) == 0x544146) return 0;	/* Check "FAT" string */

+		if (ld_dword(fs->win + BS_FilSysType32) == 0x33544146) return 0;			/* Check "FAT3" string */

+	}

+#if _FS_EXFAT

+	if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT   ", 11)) return 1;

+#endif

+	return 2;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Find logical drive and check if the volume is mounted                 */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT find_volume (	/* FR_OK(0): successful, !=0: any error occurred */

+	const TCHAR** path,	/* Pointer to pointer to the path name (drive number) */

+	FATFS** rfs,		/* Pointer to pointer to the found file system object */

+	BYTE mode			/* !=0: Check write protection for write access */

+)

+{

+	BYTE fmt, *pt;

+	int vol;

+	DSTATUS stat;

+	DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];

+	WORD nrsv;

+	FATFS *fs;

+	UINT i;

+

+

+	/* Get logical drive number */

+	*rfs = 0;

+	vol = get_ldnumber(path);

+	if (vol < 0) return FR_INVALID_DRIVE;

+

+	/* Check if the file system object is valid or not */

+	fs = FatFs[vol];					/* Get pointer to the file system object */

+	if (!fs) return FR_NOT_ENABLED;		/* Is the file system object available? */

+

+	ENTER_FF(fs);						/* Lock the volume */

+	*rfs = fs;							/* Return pointer to the file system object */

+

+	mode &= (BYTE)~FA_READ;				/* Desired access mode, write access or not */

+	if (fs->fs_type) {					/* If the volume has been mounted */

+		stat = disk_status(fs->drv);

+		if (!(stat & STA_NOINIT)) {		/* and the physical drive is kept initialized */

+			if (!_FS_READONLY && mode && (stat & STA_PROTECT)) {	/* Check write protection if needed */

+				return FR_WRITE_PROTECTED;

+			}

+			return FR_OK;				/* The file system object is valid */

+		}

+	}

+

+	/* The file system object is not valid. */

+	/* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */

+

+	fs->fs_type = 0;					/* Clear the file system object */

+	fs->drv = LD2PD(vol);				/* Bind the logical drive and a physical drive */

+	stat = disk_initialize(fs->drv);	/* Initialize the physical drive */

+	if (stat & STA_NOINIT) { 			/* Check if the initialization succeeded */

+		return FR_NOT_READY;			/* Failed to initialize due to no medium or hard error */

+	}

+	if (!_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */

+		return FR_WRITE_PROTECTED;

+	}

+#if _MAX_SS != _MIN_SS						/* Get sector size (multiple sector size cfg only) */

+	if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;

+	if (SS(fs) > _MAX_SS || SS(fs) < _MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;

+#endif

+	/* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */

+	bsect = 0;

+	fmt = check_fs(fs, bsect);			/* Load sector 0 and check if it is an FAT-VBR as SFD */

+	if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) {	/* Not an FAT-VBR or forced partition number */

+		for (i = 0; i < 4; i++) {			/* Get partition offset */

+			pt = fs->win + (MBR_Table + i * SZ_PTE);

+			br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0;

+		}

+		i = LD2PT(vol);						/* Partition number: 0:auto, 1-4:forced */

+		if (i) i--;

+		do {								/* Find an FAT volume */

+			bsect = br[i];

+			fmt = bsect ? check_fs(fs, bsect) : 3;	/* Check the partition */

+		} while (!LD2PT(vol) && fmt >= 2 && ++i < 4);

+	}

+	if (fmt == 4) return FR_DISK_ERR;		/* An error occured in the disk I/O layer */

+	if (fmt >= 2) return FR_NO_FILESYSTEM;	/* No FAT volume is found */

+

+	/* An FAT volume is found. Following code initializes the file system object */

+

+#if _FS_EXFAT

+	if (fmt == 1) {

+		QWORD maxlba;

+

+		for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ;	/* Check zero filler */

+		if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;

+

+		if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM;	/* Check exFAT revision (Must be 1.0) */

+

+		if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs))	/* (BPB_BytsPerSecEx must be equal to the physical sector size) */

+			return FR_NO_FILESYSTEM;

+

+		maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect;	/* Last LBA + 1 of the volume */

+		if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM;	/* (It cannot be handled in 32-bit LBA) */

+

+		fs->fsize = ld_dword(fs->win + BPB_FatSzEx);	/* Number of sectors per FAT */

+

+		fs->n_fats = fs->win[BPB_NumFATsEx];			/* Number of FATs */

+		if (fs->n_fats != 1) return FR_NO_FILESYSTEM;	/* (Supports only 1 FAT) */

+

+		fs->csize = 1 << fs->win[BPB_SecPerClusEx];		/* Cluster size */

+		if (fs->csize == 0)	return FR_NO_FILESYSTEM;	/* (Must be 1..32768) */

+

+		nclst = ld_dword(fs->win + BPB_NumClusEx);		/* Number of clusters */

+		if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM;	/* (Too many clusters) */

+		fs->n_fatent = nclst + 2;

+

+		/* Boundaries and Limits */

+		fs->volbase = bsect;

+		fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);

+		fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);

+		if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM;	/* (Volume size must not be smaller than the size requiered) */

+		fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);

+

+		/* Check if bitmap location is in assumption (at the first cluster) */

+		if (move_window(fs, clust2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR;

+		for (i = 0; i < SS(fs); i += SZDIRE) {

+			if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break;	/* 81 entry with cluster #2? */

+		}

+		if (i == SS(fs)) return FR_NO_FILESYSTEM;

+#if !_FS_READONLY

+		fs->last_clst = fs->free_clst = 0xFFFFFFFF;		/* Initialize cluster allocation information */

+#endif

+		fmt = FS_EXFAT;			/* FAT sub-type */

+	} else

+#endif	/* _FS_EXFAT */

+	{

+		if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM;	/* (BPB_BytsPerSec must be equal to the physical sector size) */

+

+		fasize = ld_word(fs->win + BPB_FATSz16);			/* Number of sectors per FAT */

+		if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);

+		fs->fsize = fasize;

+

+		fs->n_fats = fs->win[BPB_NumFATs];					/* Number of FATs */

+		if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM;	/* (Must be 1 or 2) */

+		fasize *= fs->n_fats;								/* Number of sectors for FAT area */

+

+		fs->csize = fs->win[BPB_SecPerClus];				/* Cluster size */

+		if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM;	/* (Must be power of 2) */

+

+		fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt);	/* Number of root directory entries */

+		if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM;	/* (Must be sector aligned) */

+

+		tsect = ld_word(fs->win + BPB_TotSec16);			/* Number of sectors on the volume */

+		if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);

+

+		nrsv = ld_word(fs->win + BPB_RsvdSecCnt);			/* Number of reserved sectors */

+		if (nrsv == 0) return FR_NO_FILESYSTEM;				/* (Must not be 0) */

+

+		/* Determine the FAT sub type */

+		sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE);	/* RSV + FAT + DIR */

+		if (tsect < sysect) return FR_NO_FILESYSTEM;		/* (Invalid volume size) */

+		nclst = (tsect - sysect) / fs->csize;				/* Number of clusters */

+		if (nclst == 0) return FR_NO_FILESYSTEM;			/* (Invalid volume size) */

+		fmt = FS_FAT32;

+		if (nclst <= MAX_FAT16) fmt = FS_FAT16;

+		if (nclst <= MAX_FAT12) fmt = FS_FAT12;

+

+		/* Boundaries and Limits */

+		fs->n_fatent = nclst + 2;							/* Number of FAT entries */

+		fs->volbase = bsect;								/* Volume start sector */

+		fs->fatbase = bsect + nrsv; 						/* FAT start sector */

+		fs->database = bsect + sysect;						/* Data start sector */

+		if (fmt == FS_FAT32) {

+			if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM;	/* (Must be FAT32 revision 0.0) */

+			if (fs->n_rootdir) return FR_NO_FILESYSTEM;		/* (BPB_RootEntCnt must be 0) */

+			fs->dirbase = ld_dword(fs->win + BPB_RootClus32);	/* Root directory start cluster */

+			szbfat = fs->n_fatent * 4;						/* (Needed FAT size) */

+		} else {

+			if (fs->n_rootdir == 0)	return FR_NO_FILESYSTEM;/* (BPB_RootEntCnt must not be 0) */

+			fs->dirbase = fs->fatbase + fasize;				/* Root directory start sector */

+			szbfat = (fmt == FS_FAT16) ?					/* (Needed FAT size) */

+				fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);

+		}

+		if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM;	/* (BPB_FATSz must not be less than the size needed) */

+

+#if !_FS_READONLY

+		/* Get FSINFO if available */

+		fs->last_clst = fs->free_clst = 0xFFFFFFFF;		/* Initialize cluster allocation information */

+		fs->fsi_flag = 0x80;

+#if (_FS_NOFSINFO & 3) != 3

+		if (fmt == FS_FAT32				/* Enable FSINFO only if FAT32 and BPB_FSInfo32 == 1 */

+			&& ld_word(fs->win + BPB_FSInfo32) == 1

+			&& move_window(fs, bsect + 1) == FR_OK)

+		{

+			fs->fsi_flag = 0;

+			if (ld_word(fs->win + BS_55AA) == 0xAA55	/* Load FSINFO data if available */

+				&& ld_dword(fs->win + FSI_LeadSig) == 0x41615252

+				&& ld_dword(fs->win + FSI_StrucSig) == 0x61417272)

+			{

+#if (_FS_NOFSINFO & 1) == 0

+				fs->free_clst = ld_dword(fs->win + FSI_Free_Count);

+#endif

+#if (_FS_NOFSINFO & 2) == 0

+				fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);

+#endif

+			}

+		}

+#endif	/* (_FS_NOFSINFO & 3) != 3 */

+#endif	/* !_FS_READONLY */

+	}

+

+	fs->fs_type = fmt;	/* FAT sub-type */

+	fs->id = ++Fsid;	/* File system mount ID */

+#if _USE_LFN == 1

+	fs->lfnbuf = LfnBuf;	/* Static LFN working buffer */

+#if _FS_EXFAT

+	fs->dirbuf = DirBuf;	/* Static directory block working buuffer */

+#endif

+#endif

+#if _FS_RPATH != 0

+	fs->cdir = 0;		/* Initialize current directory */

+#endif

+#if _FS_LOCK != 0		/* Clear file lock semaphores */

+	clear_lock(fs);

+#endif

+	return FR_OK;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Check if the file/directory object is valid or not                    */

+/*-----------------------------------------------------------------------*/

+

+static

+FRESULT validate (	/* Returns FR_OK or FR_INVALID_OBJECT */

+	_FDID* obj,		/* Pointer to the _OBJ, the 1st member in the FIL/DIR object, to check validity */

+	FATFS** fs		/* Pointer to pointer to the owner file system object to return */

+)

+{

+	FRESULT res;

+

+

+	if (!obj || !obj->fs || !obj->fs->fs_type || obj->fs->id != obj->id || (disk_status(obj->fs->drv) & STA_NOINIT)) {

+		*fs = 0;				/* The object is invalid */

+		res = FR_INVALID_OBJECT;

+	} else {

+		*fs = obj->fs;			/* Owner file sytem object */

+		ENTER_FF(obj->fs);		/* Lock file system */

+		res = FR_OK;

+	}

+	return res;

+}

+

+

+

+

+/*---------------------------------------------------------------------------

+

+   Public Functions (FatFs API)

+

+----------------------------------------------------------------------------*/

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Mount/Unmount a Logical Drive                                         */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_mount (

+	FATFS* fs,			/* Pointer to the file system object (NULL:unmount)*/

+	const TCHAR* path,	/* Logical drive number to be mounted/unmounted */

+	BYTE opt			/* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */

+)

+{

+	FATFS *cfs;

+	int vol;

+	FRESULT res;

+	const TCHAR *rp = path;

+

+

+	/* Get logical drive number */

+	vol = get_ldnumber(&rp);

+	if (vol < 0) return FR_INVALID_DRIVE;

+	cfs = FatFs[vol];					/* Pointer to fs object */

+

+	if (cfs) {

+#if _FS_LOCK != 0

+		clear_lock(cfs);

+#endif

+#if _FS_REENTRANT						/* Discard sync object of the current volume */

+		if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;

+#endif

+		cfs->fs_type = 0;				/* Clear old fs object */

+	}

+

+	if (fs) {

+		fs->fs_type = 0;				/* Clear new fs object */

+#if _FS_REENTRANT						/* Create sync object for the new volume */

+		if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;

+#endif

+	}

+	FatFs[vol] = fs;					/* Register new fs object */

+

+	if (!fs || opt != 1) return FR_OK;	/* Do not mount now, it will be mounted later */

+

+	res = find_volume(&path, &fs, 0);	/* Force mounted the volume */

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Open or Create a File                                                 */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_open (

+	FIL* fp,			/* Pointer to the blank file object */

+	const TCHAR* path,	/* Pointer to the file name */

+	BYTE mode			/* Access mode and file open mode flags */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+#if !_FS_READONLY

+	DWORD dw, cl, bcs, clst, sc;

+	FSIZE_t ofs;

+#endif

+	DEF_NAMBUF

+

+

+	if (!fp) return FR_INVALID_OBJECT;

+

+	/* Get logical drive */

+	mode &= _FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND | FA_SEEKEND;

+	res = find_volume(&path, &fs, mode);

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+#if !_FS_READONLY	/* R/W configuration */

+		if (res == FR_OK) {

+			if (dj.fn[NSFLAG] & NS_NONAME) {	/* Origin directory itself? */

+				res = FR_INVALID_NAME;

+			}

+#if _FS_LOCK != 0

+			else {

+				res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);

+			}

+#endif

+		}

+		/* Create or Open a file */

+		if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {

+			if (res != FR_OK) {					/* No file, create new */

+				if (res == FR_NO_FILE)			/* There is no file to open, create a new entry */

+#if _FS_LOCK != 0

+					res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;

+#else

+					res = dir_register(&dj);

+#endif

+				mode |= FA_CREATE_ALWAYS;		/* File is created */

+			}

+			else {								/* Any object is already existing */

+				if (dj.obj.attr & (AM_RDO | AM_DIR)) {	/* Cannot overwrite it (R/O or DIR) */

+					res = FR_DENIED;

+				} else {

+					if (mode & FA_CREATE_NEW) res = FR_EXIST;	/* Cannot create as new file */

+				}

+			}

+			if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) {	/* Truncate it if overwrite mode */

+				dw = GET_FATTIME();

+#if _FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {

+					/* Get current allocation info */

+					fp->obj.fs = fs;

+					fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus);

+					fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);

+					fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;

+					/* Initialize directory entry block */

+					st_dword(fs->dirbuf + XDIR_CrtTime, dw);	/* Set created time */

+					fs->dirbuf[XDIR_CrtTime10] = 0;

+					st_dword(fs->dirbuf + XDIR_ModTime, dw);	/* Set modified time */

+					fs->dirbuf[XDIR_ModTime10] = 0;

+					fs->dirbuf[XDIR_Attr] = AM_ARC;				/* Reset attribute */

+					st_dword(fs->dirbuf + XDIR_FstClus, 0);		/* Reset file allocation info */

+					st_qword(fs->dirbuf + XDIR_FileSize, 0);

+					st_qword(fs->dirbuf + XDIR_ValidFileSize, 0);

+					fs->dirbuf[XDIR_GenFlags] = 1;

+					res = store_xdir(&dj);

+					if (res == FR_OK && fp->obj.sclust) {		/* Remove the cluster chain if exist */

+						res = remove_chain(&fp->obj, fp->obj.sclust, 0);

+						fs->last_clst = fp->obj.sclust - 1;		/* Reuse the cluster hole */

+					}

+				} else

+#endif

+				{

+					/* Clean directory info */

+					st_dword(dj.dir + DIR_CrtTime, dw);	/* Set created time */

+					st_dword(dj.dir + DIR_ModTime, dw);	/* Set modified time */

+					dj.dir[DIR_Attr] = AM_ARC;			/* Reset attribute */

+					cl = ld_clust(fs, dj.dir);			/* Get cluster chain */

+					st_clust(fs, dj.dir, 0);			/* Reset file allocation info */

+					st_dword(dj.dir + DIR_FileSize, 0);

+					fs->wflag = 1;

+

+					if (cl) {							/* Remove the cluster chain if exist */

+						dw = fs->winsect;

+						res = remove_chain(&dj.obj, cl, 0);

+						if (res == FR_OK) {

+							res = move_window(fs, dw);

+							fs->last_clst = cl - 1;		/* Reuse the cluster hole */

+						}

+					}

+				}

+			}

+		}

+		else {	/* Open an existing file */

+			if (res == FR_OK) {					/* Following succeeded */

+				if (dj.obj.attr & AM_DIR) {		/* It is a directory */

+					res = FR_NO_FILE;

+				} else {

+					if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* R/O violation */

+						res = FR_DENIED;

+					}

+				}

+			}

+		}

+		if (res == FR_OK) {

+			if (mode & FA_CREATE_ALWAYS)		/* Set file change flag if created or overwritten */

+				mode |= FA_MODIFIED;

+			fp->dir_sect = fs->winsect;			/* Pointer to the directory entry */

+			fp->dir_ptr = dj.dir;

+#if _FS_LOCK != 0

+			fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);

+			if (!fp->obj.lockid) res = FR_INT_ERR;

+#endif

+		}

+#else		/* R/O configuration */

+		if (res == FR_OK) {

+			if (dj.fn[NSFLAG] & NS_NONAME) {	/* Origin directory itself? */

+				res = FR_INVALID_NAME;

+			} else {

+				if (dj.obj.attr & AM_DIR) {		/* It is a directory */

+					res = FR_NO_FILE;

+				}

+			}

+		}

+#endif

+

+		if (res == FR_OK) {

+#if _FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus);		/* Get allocation info */

+				fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);

+				fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;

+				fp->obj.c_scl = dj.obj.sclust;

+				fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;

+				fp->obj.c_ofs = dj.blk_ofs;

+			} else

+#endif

+			{

+				fp->obj.sclust = ld_clust(fs, dj.dir);				/* Get allocation info */

+				fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);

+			}

+#if _USE_FASTSEEK

+			fp->cltbl = 0;			/* Disable fast seek mode */

+#endif

+			fp->obj.fs = fs;	 	/* Validate the file object */

+			fp->obj.id = fs->id;

+			fp->flag = mode;		/* Set file access mode */

+			fp->err = 0;			/* Clear error flag */

+			fp->sect = 0;			/* Invalidate current data sector */

+			fp->fptr = 0;			/* Set file pointer top of the file */

+#if !_FS_READONLY

+#if !_FS_TINY

+			mem_set(fp->buf, 0, _MAX_SS);	/* Clear sector buffer */

+#endif

+			if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) {	/* Seek to end of file if FA_OPEN_APPEND is specified */

+				fp->fptr = fp->obj.objsize;			/* Offset to seek */

+				bcs = (DWORD)fs->csize * SS(fs);	/* Cluster size in byte */

+				clst = fp->obj.sclust;				/* Follow the cluster chain */

+				for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {

+					clst = get_fat(&fp->obj, clst);

+					if (clst <= 1) res = FR_INT_ERR;

+					if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;

+				}

+				fp->clust = clst;

+				if (res == FR_OK && ofs % SS(fs)) {	/* Fill sector buffer if not on the sector boundary */

+					if ((sc = clust2sect(fs, clst)) == 0) {

+						res = FR_INT_ERR;

+					} else {

+						fp->sect = sc + (DWORD)(ofs / SS(fs));

+#if !_FS_TINY

+						if (disk_read(fs->drv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;

+#endif

+					}

+				}

+			}

+#endif

+		}

+

+		FREE_NAMBUF();

+	}

+

+	if (res != FR_OK) fp->obj.fs = 0;	/* Invalidate file object on error */

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Read File                                                             */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_read (

+	FIL* fp, 	/* Pointer to the file object */

+	void* buff,	/* Pointer to data buffer */

+	UINT btr,	/* Number of bytes to read */

+	UINT* br	/* Pointer to number of bytes read */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst, sect;

+	FSIZE_t remain;

+	UINT rcnt, cc, csect;

+	BYTE *rbuff = (BYTE*)buff;

+

+

+	*br = 0;	/* Clear read byte counter */

+	res = validate(&fp->obj, &fs);				/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);	/* Check validity */

+	if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */

+	remain = fp->obj.objsize - fp->fptr;

+	if (btr > remain) btr = (UINT)remain;		/* Truncate btr by remaining bytes */

+

+	for ( ;  btr;								/* Repeat until all data read */

+		rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {

+		if (fp->fptr % SS(fs) == 0) {			/* On the sector boundary? */

+			csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1));	/* Sector offset in the cluster */

+			if (csect == 0) {					/* On the cluster boundary? */

+				if (fp->fptr == 0) {			/* On the top of the file? */

+					clst = fp->obj.sclust;		/* Follow cluster chain from the origin */

+				} else {						/* Middle or end of the file */

+#if _USE_FASTSEEK

+					if (fp->cltbl) {

+						clst = clmt_clust(fp, fp->fptr);	/* Get cluster# from the CLMT */

+					} else

+#endif

+					{

+						clst = get_fat(&fp->obj, fp->clust);	/* Follow cluster chain on the FAT */

+					}

+				}

+				if (clst < 2) ABORT(fs, FR_INT_ERR);

+				if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+				fp->clust = clst;				/* Update current cluster */

+			}

+			sect = clust2sect(fs, fp->clust);	/* Get current sector */

+			if (!sect) ABORT(fs, FR_INT_ERR);

+			sect += csect;

+			cc = btr / SS(fs);					/* When remaining bytes >= sector size, */

+			if (cc) {							/* Read maximum contiguous sectors directly */

+				if (csect + cc > fs->csize) {	/* Clip at cluster boundary */

+					cc = fs->csize - csect;

+				}

+				if (disk_read(fs->drv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);

+#if !_FS_READONLY && _FS_MINIMIZE <= 2			/* Replace one of the read sectors with cached data if it contains a dirty sector */

+#if _FS_TINY

+				if (fs->wflag && fs->winsect - sect < cc) {

+					mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));

+				}

+#else

+				if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {

+					mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));

+				}

+#endif

+#endif

+				rcnt = SS(fs) * cc;				/* Number of bytes transferred */

+				continue;

+			}

+#if !_FS_TINY

+			if (fp->sect != sect) {			/* Load data sector if not in cache */

+#if !_FS_READONLY

+				if (fp->flag & FA_DIRTY) {		/* Write-back dirty sector cache */

+					if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+					fp->flag &= (BYTE)~FA_DIRTY;

+				}

+#endif

+				if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK)	ABORT(fs, FR_DISK_ERR);	/* Fill sector cache */

+			}

+#endif

+			fp->sect = sect;

+		}

+		rcnt = SS(fs) - (UINT)fp->fptr % SS(fs);	/* Number of bytes left in the sector */

+		if (rcnt > btr) rcnt = btr;					/* Clip it by btr if needed */

+#if _FS_TINY

+		if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Move sector window */

+		mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt);	/* Extract partial sector */

+#else

+		mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt);	/* Extract partial sector */

+#endif

+	}

+

+	LEAVE_FF(fs, FR_OK);

+}

+

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Write File                                                            */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_write (

+	FIL* fp,			/* Pointer to the file object */

+	const void* buff,	/* Pointer to the data to be written */

+	UINT btw,			/* Number of bytes to write */

+	UINT* bw			/* Pointer to number of bytes written */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst, sect;

+	UINT wcnt, cc, csect;

+	const BYTE *wbuff = (const BYTE*)buff;

+

+

+	*bw = 0;	/* Clear write byte counter */

+	res = validate(&fp->obj, &fs);			/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);	/* Check validity */

+	if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);	/* Check access mode */

+

+	/* Check fptr wrap-around (file size cannot reach 4GiB on FATxx) */

+	if ((!_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {

+		btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);

+	}

+

+	for ( ;  btw;							/* Repeat until all data written */

+		wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize, *bw += wcnt, btw -= wcnt) {

+		if (fp->fptr % SS(fs) == 0) {		/* On the sector boundary? */

+			csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1);	/* Sector offset in the cluster */

+			if (csect == 0) {				/* On the cluster boundary? */

+				if (fp->fptr == 0) {		/* On the top of the file? */

+					clst = fp->obj.sclust;	/* Follow from the origin */

+					if (clst == 0) {		/* If no cluster is allocated, */

+						clst = create_chain(&fp->obj, 0);	/* create a new cluster chain */

+					}

+				} else {					/* On the middle or end of the file */

+#if _USE_FASTSEEK

+					if (fp->cltbl) {

+						clst = clmt_clust(fp, fp->fptr);	/* Get cluster# from the CLMT */

+					} else

+#endif

+					{

+						clst = create_chain(&fp->obj, fp->clust);	/* Follow or stretch cluster chain on the FAT */

+					}

+				}

+				if (clst == 0) break;		/* Could not allocate a new cluster (disk full) */

+				if (clst == 1) ABORT(fs, FR_INT_ERR);

+				if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+				fp->clust = clst;			/* Update current cluster */

+				if (fp->obj.sclust == 0) fp->obj.sclust = clst;	/* Set start cluster if the first write */

+			}

+#if _FS_TINY

+			if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Write-back sector cache */

+#else

+			if (fp->flag & FA_DIRTY) {		/* Write-back sector cache */

+				if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			sect = clust2sect(fs, fp->clust);	/* Get current sector */

+			if (!sect) ABORT(fs, FR_INT_ERR);

+			sect += csect;

+			cc = btw / SS(fs);				/* When remaining bytes >= sector size, */

+			if (cc) {						/* Write maximum contiguous sectors directly */

+				if (csect + cc > fs->csize) {	/* Clip at cluster boundary */

+					cc = fs->csize - csect;

+				}

+				if (disk_write(fs->drv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);

+#if _FS_MINIMIZE <= 2

+#if _FS_TINY

+				if (fs->winsect - sect < cc) {	/* Refill sector cache if it gets invalidated by the direct write */

+					mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));

+					fs->wflag = 0;

+				}

+#else

+				if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */

+					mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));

+					fp->flag &= (BYTE)~FA_DIRTY;

+				}

+#endif

+#endif

+				wcnt = SS(fs) * cc;		/* Number of bytes transferred */

+				continue;

+			}

+#if _FS_TINY

+			if (fp->fptr >= fp->obj.objsize) {	/* Avoid silly cache filling on the growing edge */

+				if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);

+				fs->winsect = sect;

+			}

+#else

+			if (fp->sect != sect && 		/* Fill sector cache with file data */

+				fp->fptr < fp->obj.objsize &&

+				disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) {

+					ABORT(fs, FR_DISK_ERR);

+			}

+#endif

+			fp->sect = sect;

+		}

+		wcnt = SS(fs) - (UINT)fp->fptr % SS(fs);	/* Number of bytes left in the sector */

+		if (wcnt > btw) wcnt = btw;					/* Clip it by btw if needed */

+#if _FS_TINY

+		if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Move sector window */

+		mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt);	/* Fit data to the sector */

+		fs->wflag = 1;

+#else

+		mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt);	/* Fit data to the sector */

+		fp->flag |= FA_DIRTY;

+#endif

+	}

+

+	fp->flag |= FA_MODIFIED;				/* Set file change flag */

+

+	LEAVE_FF(fs, FR_OK);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Synchronize the File                                                  */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_sync (

+	FIL* fp		/* Pointer to the file object */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD tm;

+	BYTE *dir;

+	DEF_NAMBUF

+

+

+	res = validate(&fp->obj, &fs);	/* Check validity of the file object */

+	if (res == FR_OK) {

+		if (fp->flag & FA_MODIFIED) {	/* Is there any change to the file? */

+#if !_FS_TINY

+			if (fp->flag & FA_DIRTY) {	/* Write-back cached data if needed */

+				if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			/* Update the directory entry */

+			tm = GET_FATTIME();				/* Modified time */

+#if _FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				res = fill_fat_chain(&fp->obj);	/* Create FAT chain if needed */

+				if (res == FR_OK) {

+					DIR dj;

+

+					INIT_NAMBUF(fs);

+					res = load_obj_dir(&dj, &fp->obj);	/* Load directory entry block */

+					if (res == FR_OK) {

+						fs->dirbuf[XDIR_Attr] |= AM_ARC;				/* Set archive bit */

+						fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1;	/* Update file allocation info */

+						st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust);

+						st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize);

+						st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize);

+						st_dword(fs->dirbuf + XDIR_ModTime, tm);		/* Update modified time */

+						fs->dirbuf[XDIR_ModTime10] = 0;

+						st_dword(fs->dirbuf + XDIR_AccTime, 0);

+						res = store_xdir(&dj);	/* Restore it to the directory */

+						if (res == FR_OK) {

+							res = sync_fs(fs);

+							fp->flag &= (BYTE)~FA_MODIFIED;

+						}

+					}

+					FREE_NAMBUF();

+				}

+			} else

+#endif

+			{

+				res = move_window(fs, fp->dir_sect);

+				if (res == FR_OK) {

+					dir = fp->dir_ptr;

+					dir[DIR_Attr] |= AM_ARC;						/* Set archive bit */

+					st_clust(fp->obj.fs, dir, fp->obj.sclust);		/* Update file allocation info  */

+					st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize);	/* Update file size */

+					st_dword(dir + DIR_ModTime, tm);				/* Update modified time */

+					st_word(dir + DIR_LstAccDate, 0);

+					fs->wflag = 1;

+					res = sync_fs(fs);					/* Restore it to the directory */

+					fp->flag &= (BYTE)~FA_MODIFIED;

+				}

+			}

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* !_FS_READONLY */

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Close File                                                            */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_close (

+	FIL* fp		/* Pointer to the file object to be closed */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+

+#if !_FS_READONLY

+	res = f_sync(fp);					/* Flush cached data */

+	if (res == FR_OK)

+#endif

+	{

+		res = validate(&fp->obj, &fs);	/* Lock volume */

+		if (res == FR_OK) {

+#if _FS_LOCK != 0

+			res = dec_lock(fp->obj.lockid);	/* Decrement file open counter */

+			if (res == FR_OK)

+#endif

+			{

+				fp->obj.fs = 0;			/* Invalidate file object */

+			}

+#if _FS_REENTRANT

+			unlock_fs(fs, FR_OK);		/* Unlock volume */

+#endif

+		}

+	}

+	return res;

+}

+

+

+

+

+#if _FS_RPATH >= 1

+/*-----------------------------------------------------------------------*/

+/* Change Current Directory or Current Drive, Get Current Directory      */

+/*-----------------------------------------------------------------------*/

+

+#if _VOLUMES >= 2

+FRESULT f_chdrive (

+	const TCHAR* path		/* Drive number */

+)

+{

+	int vol;

+

+

+	/* Get logical drive number */

+	vol = get_ldnumber(&path);

+	if (vol < 0) return FR_INVALID_DRIVE;

+

+	CurrVol = (BYTE)vol;	/* Set it as current volume */

+

+	return FR_OK;

+}

+#endif

+

+

+FRESULT f_chdir (

+	const TCHAR* path	/* Pointer to the directory path */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	DEF_NAMBUF

+

+	/* Get logical drive */

+	res = find_volume(&path, &fs, 0);

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);		/* Follow the path */

+		if (res == FR_OK) {					/* Follow completed */

+			if (dj.fn[NSFLAG] & NS_NONAME) {

+				fs->cdir = dj.obj.sclust;	/* It is the start directory itself */

+#if _FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {

+					fs->cdc_scl = dj.obj.c_scl;

+					fs->cdc_size = dj.obj.c_size;

+					fs->cdc_ofs = dj.obj.c_ofs;

+				}

+#endif

+			} else {

+				if (dj.obj.attr & AM_DIR) {	/* It is a sub-directory */

+#if _FS_EXFAT

+					if (fs->fs_type == FS_EXFAT) {

+						fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus);		/* Sub-directory cluster */

+						fs->cdc_scl = dj.obj.sclust;						/* Save containing directory information */

+						fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;

+						fs->cdc_ofs = dj.blk_ofs;

+					} else

+#endif

+					{

+						fs->cdir = ld_clust(fs, dj.dir);					/* Sub-directory cluster */

+					}

+				} else {

+					res = FR_NO_PATH;		/* Reached but a file */

+				}

+			}

+		}

+		FREE_NAMBUF();

+		if (res == FR_NO_FILE) res = FR_NO_PATH;

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+#if _FS_RPATH >= 2

+FRESULT f_getcwd (

+	TCHAR* buff,	/* Pointer to the directory path */

+	UINT len		/* Size of path */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	UINT i, n;

+	DWORD ccl;

+	TCHAR *tp;

+	FILINFO fno;

+	DEF_NAMBUF

+

+

+	*buff = 0;

+	/* Get logical drive */

+	res = find_volume((const TCHAR**)&buff, &fs, 0);	/* Get current volume */

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		i = len;			/* Bottom of buffer (directory stack base) */

+		if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {	/* (Cannot do getcwd on exFAT and returns root path) */

+			dj.obj.sclust = fs->cdir;				/* Start to follow upper directory from current directory */

+			while ((ccl = dj.obj.sclust) != 0) {	/* Repeat while current directory is a sub-directory */

+				res = dir_sdi(&dj, 1 * SZDIRE);	/* Get parent directory */

+				if (res != FR_OK) break;

+				res = move_window(fs, dj.sect);

+				if (res != FR_OK) break;

+				dj.obj.sclust = ld_clust(fs, dj.dir);	/* Goto parent directory */

+				res = dir_sdi(&dj, 0);

+				if (res != FR_OK) break;

+				do {							/* Find the entry links to the child directory */

+					res = dir_read(&dj, 0);

+					if (res != FR_OK) break;

+					if (ccl == ld_clust(fs, dj.dir)) break;	/* Found the entry */

+					res = dir_next(&dj, 0);

+				} while (res == FR_OK);

+				if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */

+				if (res != FR_OK) break;

+				get_fileinfo(&dj, &fno);		/* Get the directory name and push it to the buffer */

+				for (n = 0; fno.fname[n]; n++) ;

+				if (i < n + 3) {

+					res = FR_NOT_ENOUGH_CORE; break;

+				}

+				while (n) buff[--i] = fno.fname[--n];

+				buff[--i] = '/';

+			}

+		}

+		tp = buff;

+		if (res == FR_OK) {

+#if _VOLUMES >= 2

+			*tp++ = '0' + CurrVol;			/* Put drive number */

+			*tp++ = ':';

+#endif

+			if (i == len) {					/* Root-directory */

+				*tp++ = '/';

+			} else {						/* Sub-directroy */

+				do		/* Add stacked path str */

+					*tp++ = buff[i++];

+				while (i < len);

+			}

+		}

+		*tp = 0;

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* _FS_RPATH >= 2 */

+#endif /* _FS_RPATH >= 1 */

+

+

+

+#if _FS_MINIMIZE <= 2

+/*-----------------------------------------------------------------------*/

+/* Seek File R/W Pointer                                                 */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_lseek (

+	FIL* fp,		/* Pointer to the file object */

+	FSIZE_t ofs		/* File pointer from top of file */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst, bcs, nsect;

+	FSIZE_t ifptr;

+#if _USE_FASTSEEK

+	DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;

+#endif

+

+	res = validate(&fp->obj, &fs);		/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);	/* Check validity */

+#if _USE_FASTSEEK

+	if (fp->cltbl) {	/* Fast seek */

+		if (ofs == CREATE_LINKMAP) {	/* Create CLMT */

+			tbl = fp->cltbl;

+			tlen = *tbl++; ulen = 2;	/* Given table size and required table size */

+			cl = fp->obj.sclust;		/* Origin of the chain */

+			if (cl) {

+				do {

+					/* Get a fragment */

+					tcl = cl; ncl = 0; ulen += 2;	/* Top, length and used items */

+					do {

+						pcl = cl; ncl++;

+						cl = get_fat(&fp->obj, cl);

+						if (cl <= 1) ABORT(fs, FR_INT_ERR);

+						if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+					} while (cl == pcl + 1);

+					if (ulen <= tlen) {		/* Store the length and top of the fragment */

+						*tbl++ = ncl; *tbl++ = tcl;

+					}

+				} while (cl < fs->n_fatent);	/* Repeat until end of chain */

+			}

+			*fp->cltbl = ulen;	/* Number of items used */

+			if (ulen <= tlen) {

+				*tbl = 0;		/* Terminate table */

+			} else {

+				res = FR_NOT_ENOUGH_CORE;	/* Given table size is smaller than required */

+			}

+		} else {						/* Fast seek */

+			if (ofs > fp->obj.objsize) ofs = fp->obj.objsize;	/* Clip offset at the file size */

+			fp->fptr = ofs;				/* Set file pointer */

+			if (ofs) {

+				fp->clust = clmt_clust(fp, ofs - 1);

+				dsc = clust2sect(fs, fp->clust);

+				if (!dsc) ABORT(fs, FR_INT_ERR);

+				dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);

+				if (fp->fptr % SS(fs) && dsc != fp->sect) {	/* Refill sector cache if needed */

+#if !_FS_TINY

+#if !_FS_READONLY

+					if (fp->flag & FA_DIRTY) {		/* Write-back dirty sector cache */

+						if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+						fp->flag &= (BYTE)~FA_DIRTY;

+					}

+#endif

+					if (disk_read(fs->drv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);	/* Load current sector */

+#endif

+					fp->sect = dsc;

+				}

+			}

+		}

+	} else

+#endif

+

+	/* Normal Seek */

+	{

+#if _FS_EXFAT

+		if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF;	/* Clip at 4GiB-1 if at FATxx */

+#endif

+		if (ofs > fp->obj.objsize && (_FS_READONLY || !(fp->flag & FA_WRITE))) {	/* In read-only mode, clip offset with the file size */

+			ofs = fp->obj.objsize;

+		}

+		ifptr = fp->fptr;

+		fp->fptr = nsect = 0;

+		if (ofs) {

+			bcs = (DWORD)fs->csize * SS(fs);	/* Cluster size (byte) */

+			if (ifptr > 0 &&

+				(ofs - 1) / bcs >= (ifptr - 1) / bcs) {	/* When seek to same or following cluster, */

+				fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1);	/* start from the current cluster */

+				ofs -= fp->fptr;

+				clst = fp->clust;

+			} else {									/* When seek to back cluster, */

+				clst = fp->obj.sclust;					/* start from the first cluster */

+#if !_FS_READONLY

+				if (clst == 0) {						/* If no cluster chain, create a new chain */

+					clst = create_chain(&fp->obj, 0);

+					if (clst == 1) ABORT(fs, FR_INT_ERR);

+					if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+					fp->obj.sclust = clst;

+				}

+#endif

+				fp->clust = clst;

+			}

+			if (clst != 0) {

+				while (ofs > bcs) {						/* Cluster following loop */

+					ofs -= bcs; fp->fptr += bcs;

+#if !_FS_READONLY

+					if (fp->flag & FA_WRITE) {			/* Check if in write mode or not */

+						if (_FS_EXFAT && fp->fptr > fp->obj.objsize) {	/* No FAT chain object needs correct objsize to generate FAT value */

+							fp->obj.objsize = fp->fptr;

+							fp->flag |= FA_MODIFIED;

+						}

+						clst = create_chain(&fp->obj, clst);	/* Follow chain with forceed stretch */

+						if (clst == 0) {				/* Clip file size in case of disk full */

+							ofs = 0; break;

+						}

+					} else

+#endif

+					{

+						clst = get_fat(&fp->obj, clst);	/* Follow cluster chain if not in write mode */

+					}

+					if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+					if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);

+					fp->clust = clst;

+				}

+				fp->fptr += ofs;

+				if (ofs % SS(fs)) {

+					nsect = clust2sect(fs, clst);	/* Current sector */

+					if (!nsect) ABORT(fs, FR_INT_ERR);

+					nsect += (DWORD)(ofs / SS(fs));

+				}

+			}

+		}

+		if (!_FS_READONLY && fp->fptr > fp->obj.objsize) {		/* Set file change flag if the file size is extended */

+			fp->obj.objsize = fp->fptr;

+			fp->flag |= FA_MODIFIED;

+		}

+		if (fp->fptr % SS(fs) && nsect != fp->sect) {	/* Fill sector cache if needed */

+#if !_FS_TINY

+#if !_FS_READONLY

+			if (fp->flag & FA_DIRTY) {			/* Write-back dirty sector cache */

+				if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			if (disk_read(fs->drv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);	/* Fill sector cache */

+#endif

+			fp->sect = nsect;

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+#if _FS_MINIMIZE <= 1

+/*-----------------------------------------------------------------------*/

+/* Create a Directory Object                                             */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_opendir (

+	DIR* dp,			/* Pointer to directory object to create */

+	const TCHAR* path	/* Pointer to the directory path */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	_FDID *obj;

+	DEF_NAMBUF

+

+

+	if (!dp) return FR_INVALID_OBJECT;

+

+	/* Get logical drive */

+	obj = &dp->obj;

+	res = find_volume(&path, &fs, 0);

+	if (res == FR_OK) {

+		obj->fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(dp, path);			/* Follow the path to the directory */

+		if (res == FR_OK) {						/* Follow completed */

+			if (!(dp->fn[NSFLAG] & NS_NONAME)) {	/* It is not the origin directory itself */

+				if (obj->attr & AM_DIR) {		/* This object is a sub-directory */

+#if _FS_EXFAT

+					if (fs->fs_type == FS_EXFAT) {

+						obj->c_scl = obj->sclust;	/* Save containing directory inforamation */

+						obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat;

+						obj->c_ofs = dp->blk_ofs;

+						obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus);	/* Get object location and status */

+						obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize);

+						obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;

+					} else

+#endif

+					{

+						obj->sclust = ld_clust(fs, dp->dir);	/* Get object location */

+					}

+				} else {						/* This object is a file */

+					res = FR_NO_PATH;

+				}

+			}

+			if (res == FR_OK) {

+				obj->id = fs->id;

+				res = dir_sdi(dp, 0);			/* Rewind directory */

+#if _FS_LOCK != 0

+				if (res == FR_OK) {

+					if (obj->sclust) {

+						obj->lockid = inc_lock(dp, 0);	/* Lock the sub directory */

+						if (!obj->lockid) res = FR_TOO_MANY_OPEN_FILES;

+					} else {

+						obj->lockid = 0;	/* Root directory need not to be locked */

+					}

+				}

+#endif

+			}

+		}

+		FREE_NAMBUF();

+		if (res == FR_NO_FILE) res = FR_NO_PATH;

+	}

+	if (res != FR_OK) obj->fs = 0;		/* Invalidate the directory object if function faild */

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Close Directory                                                       */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_closedir (

+	DIR *dp		/* Pointer to the directory object to be closed */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+

+

+	res = validate(&dp->obj, &fs);			/* Check validity of the file object */

+	if (res == FR_OK) {

+#if _FS_LOCK != 0

+		if (dp->obj.lockid) {				/* Decrement sub-directory open counter */

+			res = dec_lock(dp->obj.lockid);

+		}

+		if (res == FR_OK)

+#endif

+		{

+			dp->obj.fs = 0;			/* Invalidate directory object */

+		}

+#if _FS_REENTRANT

+		unlock_fs(fs, FR_OK);		/* Unlock volume */

+#endif

+	}

+	return res;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Read Directory Entries in Sequence                                    */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_readdir (

+	DIR* dp,			/* Pointer to the open directory object */

+	FILINFO* fno		/* Pointer to file information to return */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	res = validate(&dp->obj, &fs);	/* Check validity of the directory object */

+	if (res == FR_OK) {

+		if (!fno) {

+			res = dir_sdi(dp, 0);			/* Rewind the directory object */

+		} else {

+			INIT_NAMBUF(fs);

+			res = dir_read(dp, 0);			/* Read an item */

+			if (res == FR_NO_FILE) res = FR_OK;	/* Ignore end of directory */

+			if (res == FR_OK) {				/* A valid entry is found */

+				get_fileinfo(dp, fno);		/* Get the object information */

+				res = dir_next(dp, 0);		/* Increment index for next */

+				if (res == FR_NO_FILE) res = FR_OK;	/* Ignore end of directory now */

+			}

+			FREE_NAMBUF();

+		}

+	}

+	LEAVE_FF(fs, res);

+}

+

+

+

+#if _USE_FIND

+/*-----------------------------------------------------------------------*/

+/* Find Next File                                                        */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_findnext (

+	DIR* dp,		/* Pointer to the open directory object */

+	FILINFO* fno	/* Pointer to the file information structure */

+)

+{

+	FRESULT res;

+

+

+	for (;;) {

+		res = f_readdir(dp, fno);		/* Get a directory item */

+		if (res != FR_OK || !fno || !fno->fname[0]) break;	/* Terminate if any error or end of directory */

+		if (pattern_matching(dp->pat, fno->fname, 0, 0)) break;		/* Test for the file name */

+#if _USE_LFN != 0 && _USE_FIND == 2

+		if (pattern_matching(dp->pat, fno->altname, 0, 0)) break;	/* Test for alternative name if exist */

+#endif

+	}

+	return res;

+}

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Find First File                                                       */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_findfirst (

+	DIR* dp,				/* Pointer to the blank directory object */

+	FILINFO* fno,			/* Pointer to the file information structure */

+	const TCHAR* path,		/* Pointer to the directory to open */

+	const TCHAR* pattern	/* Pointer to the matching pattern */

+)

+{

+	FRESULT res;

+

+

+	dp->pat = pattern;		/* Save pointer to pattern string */

+	res = f_opendir(dp, path);		/* Open the target directory */

+	if (res == FR_OK) {

+		res = f_findnext(dp, fno);	/* Find the first item */

+	}

+	return res;

+}

+

+#endif	/* _USE_FIND */

+

+

+

+#if _FS_MINIMIZE == 0

+/*-----------------------------------------------------------------------*/

+/* Get File Status                                                       */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_stat (

+	const TCHAR* path,	/* Pointer to the file path */

+	FILINFO* fno		/* Pointer to file information to return */

+)

+{

+	FRESULT res;

+	DIR dj;

+	DEF_NAMBUF

+

+

+	/* Get logical drive */

+	res = find_volume(&path, &dj.obj.fs, 0);

+	if (res == FR_OK) {

+		INIT_NAMBUF(dj.obj.fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+		if (res == FR_OK) {				/* Follow completed */

+			if (dj.fn[NSFLAG] & NS_NONAME) {	/* It is origin directory */

+				res = FR_INVALID_NAME;

+			} else {							/* Found an object */

+				if (fno) get_fileinfo(&dj, fno);

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(dj.obj.fs, res);

+}

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Get Number of Free Clusters                                           */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_getfree (

+	const TCHAR* path,	/* Path name of the logical drive number */

+	DWORD* nclst,		/* Pointer to a variable to return number of free clusters */

+	FATFS** fatfs		/* Pointer to return pointer to corresponding file system object */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD nfree, clst, sect, stat;

+	UINT i;

+	BYTE *p;

+	_FDID obj;

+

+

+	/* Get logical drive */

+	res = find_volume(&path, &fs, 0);

+	if (res == FR_OK) {

+		*fatfs = fs;				/* Return ptr to the fs object */

+		/* If free_clst is valid, return it without full cluster scan */

+		if (fs->free_clst <= fs->n_fatent - 2) {

+			*nclst = fs->free_clst;

+		} else {

+			/* Get number of free clusters */

+			nfree = 0;

+			if (fs->fs_type == FS_FAT12) {	/* FAT12: Sector unalighed FAT entries */

+				clst = 2; obj.fs = fs;

+				do {

+					stat = get_fat(&obj, clst);

+					if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }

+					if (stat == 1) { res = FR_INT_ERR; break; }

+					if (stat == 0) nfree++;

+				} while (++clst < fs->n_fatent);

+			} else {

+#if _FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {	/* exFAT: Scan bitmap table */

+					BYTE bm;

+					UINT b;

+

+					clst = fs->n_fatent - 2;

+					sect = fs->database;

+					i = 0;

+					do {

+						if (i == 0 && (res = move_window(fs, sect++)) != FR_OK) break;

+						for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {

+							if (!(bm & 1)) nfree++;

+							bm >>= 1;

+						}

+						i = (i + 1) % SS(fs);

+					} while (clst);

+				} else

+#endif

+				{	/* FAT16/32: Sector alighed FAT entries */

+					clst = fs->n_fatent; sect = fs->fatbase;

+					i = 0; p = 0;

+					do {

+						if (i == 0) {

+							res = move_window(fs, sect++);

+							if (res != FR_OK) break;

+							p = fs->win;

+							i = SS(fs);

+						}

+						if (fs->fs_type == FS_FAT16) {

+							if (ld_word(p) == 0) nfree++;

+							p += 2; i -= 2;

+						} else {

+							if ((ld_dword(p) & 0x0FFFFFFF) == 0) nfree++;

+							p += 4; i -= 4;

+						}

+					} while (--clst);

+				}

+			}

+			*nclst = nfree;			/* Return the free clusters */

+			fs->free_clst = nfree;	/* Now free_clst is valid */

+			fs->fsi_flag |= 1;		/* FSInfo is to be updated */

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Truncate File                                                         */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_truncate (

+	FIL* fp		/* Pointer to the file object */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD ncl;

+

+

+	res = validate(&fp->obj, &fs);	/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);

+	if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);	/* Check access mode */

+

+	if (fp->obj.objsize > fp->fptr) {

+		if (fp->fptr == 0) {	/* When set file size to zero, remove entire cluster chain */

+			res = remove_chain(&fp->obj, fp->obj.sclust, 0);

+			fp->obj.sclust = 0;

+		} else {				/* When truncate a part of the file, remove remaining clusters */

+			ncl = get_fat(&fp->obj, fp->clust);

+			res = FR_OK;

+			if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;

+			if (ncl == 1) res = FR_INT_ERR;

+			if (res == FR_OK && ncl < fs->n_fatent) {

+				res = remove_chain(&fp->obj, ncl, fp->clust);

+			}

+		}

+		fp->obj.objsize = fp->fptr;	/* Set file size to current R/W point */

+		fp->flag |= FA_MODIFIED;

+#if !_FS_TINY

+		if (res == FR_OK && (fp->flag & FA_DIRTY)) {

+			if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) {

+				res = FR_DISK_ERR;

+			} else {

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+		}

+#endif

+		if (res != FR_OK) ABORT(fs, res);

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Delete a File/Directory                                               */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_unlink (

+	const TCHAR* path		/* Pointer to the file or directory path */

+)

+{

+	FRESULT res;

+	DIR dj, sdj;

+	DWORD dclst = 0;

+	FATFS *fs;

+#if _FS_EXFAT

+	_FDID obj;

+#endif

+	DEF_NAMBUF

+

+

+	/* Get logical drive */

+	res = find_volume(&path, &fs, FA_WRITE);

+	dj.obj.fs = fs;

+	if (res == FR_OK) {

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);		/* Follow the file path */

+		if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {

+			res = FR_INVALID_NAME;			/* Cannot remove dot entry */

+		}

+#if _FS_LOCK != 0

+		if (res == FR_OK) res = chk_lock(&dj, 2);	/* Check if it is an open object */

+#endif

+		if (res == FR_OK) {					/* The object is accessible */

+			if (dj.fn[NSFLAG] & NS_NONAME) {

+				res = FR_INVALID_NAME;		/* Cannot remove the origin directory */

+			} else {

+				if (dj.obj.attr & AM_RDO) {

+					res = FR_DENIED;		/* Cannot remove R/O object */

+				}

+			}

+			if (res == FR_OK) {

+#if _FS_EXFAT

+				obj.fs = fs;

+				if (fs->fs_type == FS_EXFAT) {

+					obj.sclust = dclst = ld_dword(fs->dirbuf + XDIR_FstClus);

+					obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);

+					obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;

+				} else

+#endif

+				{

+					dclst = ld_clust(fs, dj.dir);

+				}

+				if (dj.obj.attr & AM_DIR) {			/* Is it a sub-directory ? */

+#if _FS_RPATH != 0

+					if (dclst == fs->cdir) {		 		/* Is it the current directory? */

+						res = FR_DENIED;

+					} else

+#endif

+					{

+						sdj.obj.fs = fs;						/* Open the sub-directory */

+						sdj.obj.sclust = dclst;

+#if _FS_EXFAT

+						if (fs->fs_type == FS_EXFAT) {

+							sdj.obj.objsize = obj.objsize;

+							sdj.obj.stat = obj.stat;

+						}

+#endif

+						res = dir_sdi(&sdj, 0);

+						if (res == FR_OK) {

+							res = dir_read(&sdj, 0);			/* Read an item */

+							if (res == FR_OK) res = FR_DENIED;	/* Not empty? */

+							if (res == FR_NO_FILE) res = FR_OK;	/* Empty? */

+						}

+					}

+				}

+			}

+			if (res == FR_OK) {

+				res = dir_remove(&dj);			/* Remove the directory entry */

+				if (res == FR_OK && dclst) {	/* Remove the cluster chain if exist */

+#if _FS_EXFAT

+					res = remove_chain(&obj, dclst, 0);

+#else

+					res = remove_chain(&dj.obj, dclst, 0);

+#endif

+				}

+				if (res == FR_OK) res = sync_fs(fs);

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Create a Directory                                                    */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_mkdir (

+	const TCHAR* path		/* Pointer to the directory path */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	BYTE *dir;

+	UINT n;

+	DWORD dsc, dcl, pcl, tm;

+	DEF_NAMBUF

+

+

+	/* Get logical drive */

+	res = find_volume(&path, &fs, FA_WRITE);

+	dj.obj.fs = fs;

+	if (res == FR_OK) {

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);			/* Follow the file path */

+		if (res == FR_OK) res = FR_EXIST;		/* Any object with same name is already existing */

+		if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) {

+			res = FR_INVALID_NAME;

+		}

+		if (res == FR_NO_FILE) {				/* Can create a new directory */

+			dcl = create_chain(&dj.obj, 0);		/* Allocate a cluster for the new directory table */

+			dj.obj.objsize = (DWORD)fs->csize * SS(fs);

+			res = FR_OK;

+			if (dcl == 0) res = FR_DENIED;		/* No space to allocate a new cluster */

+			if (dcl == 1) res = FR_INT_ERR;

+			if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;

+			if (res == FR_OK) res = sync_window(fs);	/* Flush FAT */

+			tm = GET_FATTIME();

+			if (res == FR_OK) {					/* Initialize the new directory table */

+				dsc = clust2sect(fs, dcl);

+				dir = fs->win;

+				mem_set(dir, 0, SS(fs));

+				if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {

+					mem_set(dir + DIR_Name, ' ', 11);	/* Create "." entry */

+					dir[DIR_Name] = '.';

+					dir[DIR_Attr] = AM_DIR;

+					st_dword(dir + DIR_ModTime, tm);

+					st_clust(fs, dir, dcl);

+					mem_cpy(dir + SZDIRE, dir, SZDIRE); 	/* Create ".." entry */

+					dir[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;

+					if (fs->fs_type == FS_FAT32 && pcl == fs->dirbase) pcl = 0;

+					st_clust(fs, dir + SZDIRE, pcl);

+				}

+				for (n = fs->csize; n; n--) {	/* Write dot entries and clear following sectors */

+					fs->winsect = dsc++;

+					fs->wflag = 1;

+					res = sync_window(fs);

+					if (res != FR_OK) break;

+					mem_set(dir, 0, SS(fs));

+				}

+			}

+			if (res == FR_OK) res = dir_register(&dj);	/* Register the object to the directoy */

+			if (res == FR_OK) {

+#if _FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {	/* Initialize directory entry block */

+					st_dword(fs->dirbuf + XDIR_ModTime, tm);	/* Created time */

+					st_dword(fs->dirbuf + XDIR_FstClus, dcl);	/* Table start cluster */

+					st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize);	/* File size needs to be valid */

+					st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize);

+					fs->dirbuf[XDIR_GenFlags] = 3;				/* Initialize the object flag (contiguous) */

+					fs->dirbuf[XDIR_Attr] = AM_DIR;				/* Attribute */

+					res = store_xdir(&dj);

+				} else

+#endif

+				{

+					dir = dj.dir;

+					st_dword(dir + DIR_ModTime, tm);	/* Created time */

+					st_clust(fs, dir, dcl);				/* Table start cluster */

+					dir[DIR_Attr] = AM_DIR;				/* Attribute */

+					fs->wflag = 1;

+				}

+				if (res == FR_OK) res = sync_fs(fs);

+			} else {

+				remove_chain(&dj.obj, dcl, 0);		/* Could not register, remove cluster chain */

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Rename a File/Directory                                               */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_rename (

+	const TCHAR* path_old,	/* Pointer to the object name to be renamed */

+	const TCHAR* path_new	/* Pointer to the new name */

+)

+{

+	FRESULT res;

+	DIR djo, djn;

+	FATFS *fs;

+	BYTE buf[_FS_EXFAT ? SZDIRE * 2 : 24], *dir;

+	DWORD dw;

+	DEF_NAMBUF

+

+

+	get_ldnumber(&path_new);						/* Ignore drive number of new name */

+	res = find_volume(&path_old, &fs, FA_WRITE);	/* Get logical drive of the old object */

+	if (res == FR_OK) {

+		djo.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&djo, path_old);		/* Check old object */

+		if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;	/* Check validity of name */

+#if _FS_LOCK != 0

+		if (res == FR_OK) res = chk_lock(&djo, 2);

+#endif

+		if (res == FR_OK) {						/* Object to be renamed is found */

+#if _FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {	/* At exFAT */

+				BYTE nf, nn;

+				WORD nh;

+

+				mem_cpy(buf, fs->dirbuf, SZDIRE * 2);	/* Save 85+C0 entry of old object */

+				mem_cpy(&djn, &djo, sizeof djo);

+				res = follow_path(&djn, path_new);		/* Make sure if new object name is not in use */

+				if (res == FR_OK) {						/* Is new name already in use by any other object? */

+					res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;

+				}

+				if (res == FR_NO_FILE) { 				/* It is a valid path and no name collision */

+					res = dir_register(&djn);			/* Register the new entry */

+					if (res == FR_OK) {

+						nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];

+						nh = ld_word(fs->dirbuf + XDIR_NameHash);

+						mem_cpy(fs->dirbuf, buf, SZDIRE * 2);

+						fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;

+						st_word(fs->dirbuf + XDIR_NameHash, nh);

+/* Start of critical section where any interruption can cause a cross-link */

+						res = store_xdir(&djn);

+					}

+				}

+			} else

+#endif

+			{	/* At FAT12/FAT16/FAT32 */

+				mem_cpy(buf, djo.dir + DIR_Attr, 21);	/* Save information about the object except name */

+				mem_cpy(&djn, &djo, sizeof (DIR));		/* Duplicate the directory object */

+				res = follow_path(&djn, path_new);		/* Make sure if new object name is not in use */

+				if (res == FR_OK) {						/* Is new name already in use by any other object? */

+					res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;

+				}

+				if (res == FR_NO_FILE) { 				/* It is a valid path and no name collision */

+					res = dir_register(&djn);			/* Register the new entry */

+					if (res == FR_OK) {

+						dir = djn.dir;					/* Copy information about object except name */

+						mem_cpy(dir + 13, buf + 2, 19);

+						dir[DIR_Attr] = buf[0] | AM_ARC;

+						fs->wflag = 1;

+						if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) {	/* Update .. entry in the sub-directory if needed */

+							dw = clust2sect(fs, ld_clust(fs, dir));

+							if (!dw) {

+								res = FR_INT_ERR;

+							} else {

+/* Start of critical section where any interruption can cause a cross-link */

+								res = move_window(fs, dw);

+								dir = fs->win + SZDIRE * 1;	/* Ptr to .. entry */

+								if (res == FR_OK && dir[1] == '.') {

+									st_clust(fs, dir, djn.obj.sclust);

+									fs->wflag = 1;

+								}

+							}

+						}

+					}

+				}

+			}

+			if (res == FR_OK) {

+				res = dir_remove(&djo);		/* Remove old entry */

+				if (res == FR_OK) {

+					res = sync_fs(fs);

+				}

+			}

+/* End of critical section */

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* !_FS_READONLY */

+#endif /* _FS_MINIMIZE == 0 */

+#endif /* _FS_MINIMIZE <= 1 */

+#endif /* _FS_MINIMIZE <= 2 */

+

+

+

+#if _USE_CHMOD && !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Change Attribute                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_chmod (

+	const TCHAR* path,	/* Pointer to the file path */

+	BYTE attr,			/* Attribute bits */

+	BYTE mask			/* Attribute mask to change */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	res = find_volume(&path, &fs, FA_WRITE);	/* Get logical drive */

+	dj.obj.fs = fs;

+	if (res == FR_OK) {

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+		if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;	/* Check object validity */

+		if (res == FR_OK) {

+			mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;	/* Valid attribute mask */

+#if _FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask);	/* Apply attribute change */

+				res = store_xdir(&dj);

+			} else

+#endif

+			{

+				dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask);	/* Apply attribute change */

+				fs->wflag = 1;

+			}

+			if (res == FR_OK) res = sync_fs(fs);

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Change Timestamp                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_utime (

+	const TCHAR* path,	/* Pointer to the file/directory name */

+	const FILINFO* fno	/* Pointer to the time stamp to be set */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	res = find_volume(&path, &fs, FA_WRITE);	/* Get logical drive */

+	dj.obj.fs = fs;

+	if (res == FR_OK) {

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+		if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;	/* Check object validity */

+		if (res == FR_OK) {

+#if _FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);

+				res = store_xdir(&dj);

+			} else

+#endif

+			{

+				st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);

+				fs->wflag = 1;

+			}

+			if (res == FR_OK) res = sync_fs(fs);

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif	/* _USE_CHMOD && !_FS_READONLY */

+

+

+

+#if _USE_LABEL

+/*-----------------------------------------------------------------------*/

+/* Get Volume Label                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_getlabel (

+	const TCHAR* path,	/* Path name of the logical drive number */

+	TCHAR* label,		/* Pointer to a buffer to return the volume label */

+	DWORD* vsn			/* Pointer to a variable to return the volume serial number */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	UINT si, di;

+#if _LFN_UNICODE || _FS_EXFAT

+	WCHAR w;

+#endif

+

+	/* Get logical drive */

+	res = find_volume(&path, &fs, 0);

+

+	/* Get volume label */

+	if (res == FR_OK && label) {

+		dj.obj.fs = fs; dj.obj.sclust = 0;	/* Open root directory */

+		res = dir_sdi(&dj, 0);

+		if (res == FR_OK) {

+		 	res = dir_read(&dj, 1);			/* Find a volume label entry */

+		 	if (res == FR_OK) {

+#if _FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {

+					for (si = di = 0; si < dj.dir[XDIR_NumLabel]; si++) {	/* Extract volume label from 83 entry */

+						w = ld_word(dj.dir + XDIR_Label + si * 2);

+#if _LFN_UNICODE

+						label[di++] = w;

+#else

+						w = ff_convert(w, 0);	/* Unicode -> OEM */

+						if (w == 0) w = '?';	/* Replace wrong character */

+						if (_DF1S && w >= 0x100) label[di++] = (char)(w >> 8);

+						label[di++] = (char)w;

+#endif

+					}

+					label[di] = 0;

+				} else

+#endif

+				{

+					si = di = 0;		/* Extract volume label from AM_VOL entry with code comversion */

+					do {

+#if _LFN_UNICODE

+						w = (si < 11) ? dj.dir[si++] : ' ';

+						if (IsDBCS1(w) && si < 11 && IsDBCS2(dj.dir[si])) {

+							w = w << 8 | dj.dir[si++];

+						}

+						label[di++] = ff_convert(w, 1);	/* OEM -> Unicode */

+#else

+						label[di++] = dj.dir[si++];

+#endif

+					} while (di < 11);

+					do {				/* Truncate trailing spaces */

+						label[di] = 0;

+						if (di == 0) break;

+					} while (label[--di] == ' ');

+				}

+			}

+		}

+		if (res == FR_NO_FILE) {	/* No label entry and return nul string */

+			label[0] = 0;

+			res = FR_OK;

+		}

+	}

+

+	/* Get volume serial number */

+	if (res == FR_OK && vsn) {

+		res = move_window(fs, fs->volbase);

+		if (res == FR_OK) {

+			switch (fs->fs_type) {

+			case FS_EXFAT: di = BPB_VolIDEx; break;

+			case FS_FAT32: di = BS_VolID32; break;

+			default:       di = BS_VolID;

+			}

+			*vsn = ld_dword(fs->win + di);

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+#if !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Set Volume Label                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_setlabel (

+	const TCHAR* label	/* Pointer to the volume label to set */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	BYTE dirvn[22];

+	UINT i, j, slen;

+	WCHAR w;

+	static const char badchr[] = "\"*+,.:;<=>\?[]|\x7F";

+

+

+	/* Get logical drive */

+	res = find_volume(&label, &fs, FA_WRITE);

+	if (res != FR_OK) LEAVE_FF(fs, res);

+	dj.obj.fs = fs;

+

+	/* Get length of given volume label */

+	for (slen = 0; (UINT)label[slen] >= ' '; slen++) ;	/* Get name length */

+

+#if _FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		for (i = j = 0; i < slen; ) {	/* Create volume label in directory form */

+			w = label[i++];

+#if !_LFN_UNICODE

+			if (IsDBCS1(w)) {

+				w = (i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;

+			}

+			w = ff_convert(w, 1);

+#endif

+			if (w == 0 || chk_chr(badchr, w) || j == 22) {	/* Check validity check validity of the volume label */

+				LEAVE_FF(fs, FR_INVALID_NAME);

+			}

+			st_word(dirvn + j, w); j += 2;

+		}

+		slen = j;

+	} else

+#endif

+	{	/* On the FAT12/16/32 volume */

+		for ( ; slen && label[slen - 1] == ' '; slen--) ;	/* Remove trailing spaces */

+		if (slen) {		/* Is there a volume label to be set? */

+			dirvn[0] = 0; i = j = 0;	/* Create volume label in directory form */

+			do {

+#if _LFN_UNICODE

+				w = ff_convert(ff_wtoupper(label[i++]), 0);

+#else

+				w = (BYTE)label[i++];

+				if (IsDBCS1(w)) {

+					w = (j < 10 && i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;

+				}

+#if _USE_LFN != 0

+				w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);

+#else

+				if (IsLower(w)) w -= 0x20;			/* To upper ASCII characters */

+#ifdef _EXCVT

+				if (w >= 0x80) w = ExCvt[w - 0x80];	/* To upper extended characters (SBCS cfg) */

+#else

+				if (!_DF1S && w >= 0x80) w = 0;		/* Reject extended characters (ASCII cfg) */

+#endif

+#endif

+#endif

+				if (w == 0 || chk_chr(badchr, w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) {	/* Reject invalid characters for volume label */

+					LEAVE_FF(fs, FR_INVALID_NAME);

+				}

+				if (w >= 0x100) dirvn[j++] = (BYTE)(w >> 8);

+				dirvn[j++] = (BYTE)w;

+			} while (i < slen);

+			while (j < 11) dirvn[j++] = ' ';	/* Fill remaining name field */

+			if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME);	/* Reject illegal name (heading DDEM) */

+		}

+	}

+

+	/* Set volume label */

+	dj.obj.sclust = 0;		/* Open root directory */

+	res = dir_sdi(&dj, 0);

+	if (res == FR_OK) {

+		res = dir_read(&dj, 1);	/* Get volume label entry */

+		if (res == FR_OK) {

+			if (_FS_EXFAT && fs->fs_type == FS_EXFAT) {

+				dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2);	/* Change the volume label */

+				mem_cpy(dj.dir + XDIR_Label, dirvn, slen);

+			} else {

+				if (slen) {

+					mem_cpy(dj.dir, dirvn, 11);	/* Change the volume label */

+				} else {

+					dj.dir[DIR_Name] = DDEM;	/* Remove the volume label */

+				}

+			}

+			fs->wflag = 1;

+			res = sync_fs(fs);

+		} else {			/* No volume label entry is found or error */

+			if (res == FR_NO_FILE) {

+				res = FR_OK;

+				if (slen) {	/* Create a volume label entry */

+					res = dir_alloc(&dj, 1);	/* Allocate an entry */

+					if (res == FR_OK) {

+						mem_set(dj.dir, 0, SZDIRE);	/* Clear the entry */

+						if (_FS_EXFAT && fs->fs_type == FS_EXFAT) {

+							dj.dir[XDIR_Type] = 0x83;		/* Create 83 entry */

+							dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2);

+							mem_cpy(dj.dir + XDIR_Label, dirvn, slen);

+						} else {

+							dj.dir[DIR_Attr] = AM_VOL;		/* Create volume label entry */

+							mem_cpy(dj.dir, dirvn, 11);

+						}

+						fs->wflag = 1;

+						res = sync_fs(fs);

+					}

+				}

+			}

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* !_FS_READONLY */

+#endif /* _USE_LABEL */

+

+

+

+#if _USE_EXPAND && !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Allocate a Contiguous Blocks to the File                              */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_expand (

+	FIL* fp,		/* Pointer to the file object */

+	FSIZE_t fsz,	/* File size to be expanded to */

+	BYTE opt		/* Operation mode 0:Find and prepare or 1:Find and allocate */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD n, clst, stcl, scl, ncl, tcl, lclst;

+

+

+	res = validate(&fp->obj, &fs);		/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);

+	if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);

+#if _FS_EXFAT

+	if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED);	/* Check if in size limit */

+#endif

+	n = (DWORD)fs->csize * SS(fs);	/* Cluster size */

+	tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0);	/* Number of clusters required */

+	stcl = fs->last_clst; lclst = 0;

+	if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;

+

+#if _FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {

+		scl = find_bitmap(fs, stcl, tcl);			/* Find a contiguous cluster block */

+		if (scl == 0) res = FR_DENIED;				/* No contiguous cluster block was found */

+		if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;

+		if (res == FR_OK) {

+			if (opt) {

+				res = change_bitmap(fs, scl, tcl, 1);	/* Mark the cluster block 'in use' */

+				lclst = scl + tcl - 1;

+			} else {

+				lclst = scl - 1;

+			}

+		}

+	} else

+#endif

+	{

+		scl = clst = stcl; ncl = 0;

+		for (;;) {	/* Find a contiguous cluster block */

+			n = get_fat(&fp->obj, clst);

+			if (++clst >= fs->n_fatent) clst = 2;

+			if (n == 1) { res = FR_INT_ERR; break; }

+			if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }

+			if (n == 0) {	/* Is it a free cluster? */

+				if (++ncl == tcl) break;	/* Break if a contiguous cluster block is found */

+			} else {

+				scl = clst; ncl = 0;		/* Not a free cluster */

+			}

+			if (clst == stcl) { res = FR_DENIED; break; }	/* No contiguous cluster? */

+		}

+		if (res == FR_OK) {

+			if (opt) {

+				for (clst = scl, n = tcl; n; clst++, n--) {	/* Create a cluster chain on the FAT */

+					res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);

+					if (res != FR_OK) break;

+					lclst = clst;

+				}

+			} else {

+				lclst = scl - 1;

+			}

+		}

+	}

+

+	if (res == FR_OK) {

+		fs->last_clst = lclst;		/* Set suggested start cluster to start next */

+		if (opt) {

+			fp->obj.sclust = scl;		/* Update object allocation information */

+			fp->obj.objsize = fsz;

+			if (_FS_EXFAT) fp->obj.stat = 2;	/* Set status 'contiguous chain' */

+			fp->flag |= FA_MODIFIED;

+			if (fs->free_clst  < fs->n_fatent - 2) {	/* Update FSINFO */

+				fs->free_clst -= tcl;

+				fs->fsi_flag |= 1;

+			}

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* _USE_EXPAND && !_FS_READONLY */

+

+

+

+#if _USE_FORWARD

+/*-----------------------------------------------------------------------*/

+/* Forward data to the stream directly                                   */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_forward (

+	FIL* fp, 						/* Pointer to the file object */

+	UINT (*func)(const BYTE*,UINT),	/* Pointer to the streaming function */

+	UINT btf,						/* Number of bytes to forward */

+	UINT* bf						/* Pointer to number of bytes forwarded */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst, sect;

+	FSIZE_t remain;

+	UINT rcnt, csect;

+	BYTE *dbuf;

+

+

+	*bf = 0;	/* Clear transfer byte counter */

+	res = validate(&fp->obj, &fs);		/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);

+	if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED);	/* Check access mode */

+

+	remain = fp->obj.objsize - fp->fptr;

+	if (btf > remain) btf = (UINT)remain;			/* Truncate btf by remaining bytes */

+

+	for ( ;  btf && (*func)(0, 0);					/* Repeat until all data transferred or stream goes busy */

+		fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {

+		csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1));	/* Sector offset in the cluster */

+		if (fp->fptr % SS(fs) == 0) {				/* On the sector boundary? */

+			if (csect == 0) {						/* On the cluster boundary? */

+				clst = (fp->fptr == 0) ?			/* On the top of the file? */

+					fp->obj.sclust : get_fat(&fp->obj, fp->clust);

+				if (clst <= 1) ABORT(fs, FR_INT_ERR);

+				if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+				fp->clust = clst;					/* Update current cluster */

+			}

+		}

+		sect = clust2sect(fs, fp->clust);			/* Get current data sector */

+		if (!sect) ABORT(fs, FR_INT_ERR);

+		sect += csect;

+#if _FS_TINY

+		if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Move sector window to the file data */

+		dbuf = fs->win;

+#else

+		if (fp->sect != sect) {		/* Fill sector cache with file data */

+#if !_FS_READONLY

+			if (fp->flag & FA_DIRTY) {		/* Write-back dirty sector cache */

+				if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+		}

+		dbuf = fp->buf;

+#endif

+		fp->sect = sect;

+		rcnt = SS(fs) - (UINT)fp->fptr % SS(fs);	/* Number of bytes left in the sector */

+		if (rcnt > btf) rcnt = btf;					/* Clip it by btr if needed */

+		rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt);	/* Forward the file data */

+		if (!rcnt) ABORT(fs, FR_INT_ERR);

+	}

+

+	LEAVE_FF(fs, FR_OK);

+}

+#endif /* _USE_FORWARD */

+

+

+

+#if _USE_MKFS && !_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Create FAT file system on the logical drive                           */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_mkfs (

+	const TCHAR* path,	/* Logical drive number */

+	BYTE opt,			/* Format option */

+	DWORD au,			/* Size of allocation unit [byte] */

+	void* work,			/* Pointer to working buffer */

+	UINT len			/* Size of working buffer */

+)

+{

+	const UINT n_fats = 1;		/* Number of FATs for FAT12/16/32 volume (1 or 2) */

+	const UINT n_rootdir = 512;	/* Number of root directory entries for FAT12/16 volume */

+	static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0};	/* Cluster size boundary for FAT12/16 volume (4Ks unit) */

+	static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0};	/* Cluster size boundary for FAT32 volume (128Ks unit) */

+	BYTE fmt, sys, *buf, *pte, pdrv, part;

+	WORD ss;

+	DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n;

+	DWORD b_vol, b_fat, b_data;				/* Base LBA for volume, fat, data */

+	DWORD sz_vol, sz_rsv, sz_fat, sz_dir;	/* Size for volume, fat, dir, data */

+	UINT i;

+	int vol;

+	DSTATUS stat;

+#if _USE_TRIM || _FS_EXFAT

+	DWORD tbl[3];

+#endif

+

+

+	/* Check mounted drive and clear work area */

+	vol = get_ldnumber(&path);					/* Get target logical drive */

+	if (vol < 0) return FR_INVALID_DRIVE;

+	if (FatFs[vol]) FatFs[vol]->fs_type = 0;	/* Clear mounted volume */

+	pdrv = LD2PD(vol);	/* Physical drive */

+	part = LD2PT(vol);	/* Partition (0:create as new, 1-4:get from partition table) */

+

+	/* Check physical drive status */

+	stat = disk_initialize(pdrv);

+	if (stat & STA_NOINIT) return FR_NOT_READY;

+	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;

+	if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK || !sz_blk || sz_blk > 32768 || (sz_blk & (sz_blk - 1))) sz_blk = 1;	/* Erase block to align data area */

+#if _MAX_SS != _MIN_SS		/* Get sector size of the medium */

+	if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;

+	if (ss > _MAX_SS || ss < _MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;

+#else

+	ss = _MAX_SS;

+#endif

+	if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER;	/* Check if au is valid */

+	au /= ss;	/* Cluster size in unit of sector */

+

+	/* Get working buffer */

+	buf = (BYTE*)work;		/* Working buffer */

+	sz_buf = len / ss;		/* Size of working buffer (sector) */

+	szb_buf = sz_buf * ss;	/* Size of working buffer (byte) */

+	if (!szb_buf) return FR_MKFS_ABORTED;

+

+	/* Determine where the volume to be located (b_vol, sz_vol) */

+	if (_MULTI_PARTITION && part != 0) {

+		/* Get partition information from partition table in the MBR */

+		if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;	/* Load MBR */

+		if (ld_word(buf + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;	/* Check if MBR is valid */

+		pte = buf + (MBR_Table + (part - 1) * SZ_PTE);

+		if (!pte[PTE_System]) return FR_MKFS_ABORTED;	/* No partition? */

+		b_vol = ld_dword(pte + PTE_StLba);		/* Get volume start sector */

+		sz_vol = ld_dword(pte + PTE_SizLba);	/* Get volume size */

+	} else {

+		/* Create a single-partition in this function */

+		if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) return FR_DISK_ERR;

+		b_vol = (opt & FM_SFD) ? 0 : 63;		/* Volume start sector */

+		if (sz_vol < b_vol) return FR_MKFS_ABORTED;

+		sz_vol -= b_vol;						/* Volume size */

+	}

+	if (sz_vol < 128) return FR_MKFS_ABORTED;	/* Check if volume size is >=128s */

+

+	/* Pre-determine the FAT type */

+	do {

+		if (_FS_EXFAT && (opt & FM_EXFAT)) {	/* exFAT possible? */

+			if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) {	/* exFAT only, vol >= 64Ms or au > 128s ? */

+				fmt = FS_EXFAT; break;

+			}

+		}

+		if (au > 128) return FR_INVALID_PARAMETER;	/* Too large au for FAT/FAT32 */

+		if (opt & FM_FAT32) {	/* FAT32 possible? */

+			if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) {	/* FAT32 only or no-FAT? */

+				fmt = FS_FAT32; break;

+			}

+		}

+		if (!(opt & FM_FAT)) return FR_INVALID_PARAMETER;	/* no-FAT? */

+		fmt = FS_FAT16;

+	} while (0);

+

+#if _FS_EXFAT

+	if (fmt == FS_EXFAT) {	/* Create an exFAT volume */

+		DWORD szb_bit, szb_case, sum, nb, cl;

+		WCHAR ch, si;

+		UINT j, st;

+		BYTE b;

+

+		if (sz_vol < 0x1000) return FR_MKFS_ABORTED;	/* Too small volume? */

+#if _USE_TRIM

+		tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1;	/* Inform the device the volume area can be erased */

+		disk_ioctl(pdrv, CTRL_TRIM, tbl);

+#endif

+		/* Determine FAT location, data location and number of clusters */

+		if (!au) {	/* au auto-selection */

+			au = 8;

+			if (sz_vol >= 0x80000) au = 64;		/* >= 512Ks */

+			if (sz_vol >= 0x4000000) au = 256;	/* >= 64Ms */

+		}

+		b_fat = b_vol + 32;										/* FAT start at offset 32 */

+		sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss;			/* Number of FAT sectors */

+		b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1);	/* Align data area to the erase block boundary */

+		if (b_data >= sz_vol / 2) return FR_MKFS_ABORTED;		/* Too small volume? */

+		n_clst = (sz_vol - (b_data - b_vol)) / au;				/* Number of clusters */

+		if (n_clst <16) return FR_MKFS_ABORTED;					/* Too few clusters? */

+		if (n_clst > MAX_EXFAT) return FR_MKFS_ABORTED;			/* Too many clusters? */

+

+		szb_bit = (n_clst + 7) / 8;						/* Size of allocation bitmap */

+		tbl[0] = (szb_bit + au * ss - 1) / (au * ss);	/* Number of allocation bitmap clusters */

+

+		/* Create a compressed up-case table */

+		sect = b_data + au * tbl[0];	/* Table start sector */

+		sum = 0;						/* Table checksum to be stored in the 82 entry */

+		st = si = i = j = szb_case = 0;

+		do {

+			switch (st) {

+			case 0:

+				ch = ff_wtoupper(si);	/* Get an up-case char */

+				if (ch != si) {

+					si++; break;		/* Store the up-case char if exist */

+				}

+				for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ;	/* Get run length of no-case block */

+				if (j >= 128) {

+					ch = 0xFFFF; st = 2; break;	/* Compress the no-case block if run is >= 128 */

+				}

+				st = 1;			/* Do not compress short run */

+				/* continue */

+			case 1:

+				ch = si++;		/* Fill the short run */

+				if (--j == 0) st = 0;

+				break;

+			default:

+				ch = (WCHAR)j; si += j;	/* Number of chars to skip */

+				st = 0;

+			}

+			sum = xsum32(buf[i + 0] = (BYTE)ch, sum);		/* Put it into the write buffer */

+			sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);

+			i += 2; szb_case += 2;

+			if (!si || i == szb_buf) {		/* Write buffered data when buffer full or end of process */

+				n = (i + ss - 1) / ss;

+				if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;

+				sect += n; i = 0;

+			}

+		} while (si);

+		tbl[1] = (szb_case + au * ss - 1) / (au * ss);	/* Number of up-case table clusters */

+		tbl[2] = 1;										/* Number of root dir clusters */

+

+		/* Initialize the allocation bitmap */

+		sect = b_data; nsect = (szb_bit + ss - 1) / ss;	/* Start of bitmap and number of sectors */

+		nb = tbl[0] + tbl[1] + tbl[2];					/* Number of clusters in-use by system */

+		do {

+			mem_set(buf, 0, szb_buf);

+			for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ;

+			for (b = 1; nb && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ;

+			n = (nsect > sz_buf) ? sz_buf : nsect;		/* Write the buffered data */

+			if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;

+			sect += n; nsect -= n;

+		} while (nsect);

+

+		/* Initialize the FAT */

+		sect = b_fat; nsect = sz_fat;	/* Start of FAT and number of FAT sectors */

+		j = nb = cl = 0;

+		do {

+			mem_set(buf, 0, szb_buf); i = 0;	/* Clear work area and reset write index */

+			if (cl == 0) {	/* Set entry 0 and 1 */

+				st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++;

+				st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++;

+			}

+			do {			/* Create chains of bitmap, up-case and root dir */

+				while (nb && i < szb_buf) {			/* Create a chain */

+					st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF);

+					i += 4; cl++; nb--;

+				}

+				if (!nb && j < 3) nb = tbl[j++];	/* Next chain */

+			} while (nb && i < szb_buf);

+			n = (nsect > sz_buf) ? sz_buf : nsect;	/* Write the buffered data */

+			if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;

+			sect += n; nsect -= n;

+		} while (nsect);

+

+		/* Initialize the root directory */

+		mem_set(buf, 0, szb_buf);

+		buf[SZDIRE * 0 + 0] = 0x83;		/* 83 entry (volume label) */

+		buf[SZDIRE * 1 + 0] = 0x81;		/* 81 entry (allocation bitmap) */

+		st_dword(buf + SZDIRE * 1 + 20, 2);

+		st_dword(buf + SZDIRE * 1 + 24, szb_bit);

+		buf[SZDIRE * 2 + 0] = 0x82;		/* 82 entry (up-case table) */

+		st_dword(buf + SZDIRE * 2 + 4, sum);

+		st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]);

+		st_dword(buf + SZDIRE * 2 + 24, szb_case);

+		sect = b_data + au * (tbl[0] + tbl[1]);	nsect = au;	/* Start of the root directory and number of sectors */

+		do {	/* Fill root directory sectors */

+			n = (nsect > sz_buf) ? sz_buf : nsect;

+			if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;

+			mem_set(buf, 0, ss);

+			sect += n; nsect -= n;

+		} while (nsect);

+

+		/* Create two set of the exFAT VBR blocks */

+		sect = b_vol;

+		for (n = 0; n < 2; n++) {

+			/* Main record (+0) */

+			mem_set(buf, 0, ss);

+			mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT   ", 11);	/* Boot jump code (x86), OEM name */

+			st_dword(buf + BPB_VolOfsEx, b_vol);					/* Volume offset in the physical drive [sector] */

+			st_dword(buf + BPB_TotSecEx, sz_vol);					/* Volume size [sector] */

+			st_dword(buf + BPB_FatOfsEx, b_fat - b_vol);			/* FAT offset [sector] */

+			st_dword(buf + BPB_FatSzEx, sz_fat);					/* FAT size [sector] */

+			st_dword(buf + BPB_DataOfsEx, b_data - b_vol);			/* Data offset [sector] */

+			st_dword(buf + BPB_NumClusEx, n_clst);					/* Number of clusters */

+			st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]);	/* Root dir cluster # */

+			st_dword(buf + BPB_VolIDEx, GET_FATTIME());				/* VSN */

+			st_word(buf + BPB_FSVerEx, 0x100);						/* File system version (1.00) */

+			for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ;	/* Log2 of sector size [byte] */

+			for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ;	/* Log2 of cluster size [sector] */

+			buf[BPB_NumFATsEx] = 1;					/* Number of FATs */

+			buf[BPB_DrvNumEx] = 0x80;				/* Drive number (for int13) */

+			st_word(buf + BS_BootCodeEx, 0xFEEB);	/* Boot code (x86) */

+			st_word(buf + BS_55AA, 0xAA55);			/* Signature (placed here regardless of sector size) */

+			for (i = sum = 0; i < ss; i++) {		/* VBR checksum */

+				if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);

+			}

+			if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;

+			/* Extended bootstrap record (+1..+8) */

+			mem_set(buf, 0, ss);

+			st_word(buf + ss - 2, 0xAA55);	/* Signature (placed at end of sector) */

+			for (j = 1; j < 9; j++) {

+				for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ;	/* VBR checksum */

+				if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;

+			}

+			/* OEM/Reserved record (+9..+10) */

+			mem_set(buf, 0, ss);

+			for ( ; j < 11; j++) {

+				for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ;	/* VBR checksum */

+				if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;

+			}

+			/* Sum record (+11) */

+			for (i = 0; i < ss; i += 4) st_dword(buf + i, sum);		/* Fill with checksum value */

+			if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;

+		}

+

+	} else

+#endif	/* _FS_EXFAT */

+	{	/* Create an FAT12/16/32 volume */

+		do {

+			pau = au;

+			/* Pre-determine number of clusters and FAT sub-type */

+			if (fmt == FS_FAT32) {	/* FAT32 volume */

+				if (!pau) {	/* au auto-selection */

+					n = sz_vol / 0x20000;	/* Volume size in unit of 128KS */

+					for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ;	/* Get from table */

+				}

+				n_clst = sz_vol / pau;	/* Number of clusters */

+				sz_fat = (n_clst * 4 + 8 + ss - 1) / ss;	/* FAT size [sector] */

+				sz_rsv = 32;	/* Number of reserved sectors */

+				sz_dir = 0;		/* No static directory */

+				if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) return FR_MKFS_ABORTED;

+			} else {				/* FAT12/16 volume */

+				if (!pau) {	/* au auto-selection */

+					n = sz_vol / 0x1000;	/* Volume size in unit of 4KS */

+					for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ;	/* Get from table */

+				}

+				n_clst = sz_vol / pau;

+				if (n_clst > MAX_FAT12) {

+					n = n_clst * 2 + 4;		/* FAT size [byte] */

+				} else {

+					fmt = FS_FAT12;

+					n = (n_clst * 3 + 1) / 2 + 3;	/* FAT size [byte] */

+				}

+				sz_fat = (n + ss - 1) / ss;		/* FAT size [sector] */

+				sz_rsv = 1;						/* Number of reserved sectors */

+				sz_dir = (DWORD)n_rootdir * SZDIRE / ss;	/* Rootdir size [sector] */

+			}

+			b_fat = b_vol + sz_rsv;						/* FAT base */

+			b_data = b_fat + sz_fat * n_fats + sz_dir;	/* Data base */

+

+			/* Align data base to erase block boundary (for flash memory media) */

+			n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data;	/* Next nearest erase block from current data base */

+			if (fmt == FS_FAT32) {		/* FAT32: Move FAT base */

+				sz_rsv += n; b_fat += n;

+			} else {					/* FAT12/16: Expand FAT size */

+				sz_fat += n / n_fats;

+			}

+

+			/* Determine number of clusters and final check of validity of the FAT sub-type */

+			if (sz_vol < b_data + pau * 16 - b_vol) return FR_MKFS_ABORTED;	/* Too small volume */

+			n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau;

+			if (fmt == FS_FAT32) {

+				if (n_clst <= MAX_FAT16) {	/* Too few clusters for FAT32 */

+					if (!au && (au = pau / 2) != 0) continue;	/* Adjust cluster size and retry */

+					return FR_MKFS_ABORTED;

+				}

+			}

+			if (fmt == FS_FAT16) {

+				if (n_clst > MAX_FAT16) {	/* Too many clusters for FAT16 */

+					if (!au && (pau * 2) <= 64) {

+						au = pau * 2; continue;		/* Adjust cluster size and retry */

+					}

+					if ((opt & FM_FAT32)) {

+						fmt = FS_FAT32; continue;	/* Switch type to FAT32 and retry */

+					}

+					if (!au && (au = pau * 2) <= 128) continue;	/* Adjust cluster size and retry */

+					return FR_MKFS_ABORTED;

+				}

+				if  (n_clst <= MAX_FAT12) {	/* Too few clusters for FAT16 */

+					if (!au && (au = pau * 2) <= 128) continue;	/* Adjust cluster size and retry */

+					return FR_MKFS_ABORTED;

+				}

+			}

+			if (fmt == FS_FAT12 && n_clst > MAX_FAT12) return FR_MKFS_ABORTED;	/* Too many clusters for FAT12 */

+

+			/* Ok, it is the valid cluster configuration */

+			break;

+		} while (1);

+

+#if _USE_TRIM

+		tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1;	/* Inform the device the volume area can be erased */

+		disk_ioctl(pdrv, CTRL_TRIM, tbl);

+#endif

+		/* Create FAT VBR */

+		mem_set(buf, 0, ss);

+		mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */

+		st_word(buf + BPB_BytsPerSec, ss);				/* Sector size [byte] */

+		buf[BPB_SecPerClus] = (BYTE)pau;				/* Cluster size [sector] */

+		st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv);	/* Size of reserved area */

+		buf[BPB_NumFATs] = (BYTE)n_fats;				/* Number of FATs */

+		st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir));	/* Number of root directory entries */

+		if (sz_vol < 0x10000) {

+			st_word(buf + BPB_TotSec16, (WORD)sz_vol);	/* Volume size in 16-bit LBA */

+		} else {

+			st_dword(buf + BPB_TotSec32, sz_vol);		/* Volume size in 32-bit LBA */

+		}

+		buf[BPB_Media] = 0xF8;							/* Media descriptor byte */

+		st_word(buf + BPB_SecPerTrk, 63);				/* Number of sectors per track (for int13) */

+		st_word(buf + BPB_NumHeads, 255);				/* Number of heads (for int13) */

+		st_dword(buf + BPB_HiddSec, b_vol);				/* Volume offset in the physical drive [sector] */

+		if (fmt == FS_FAT32) {

+			st_dword(buf + BS_VolID32, GET_FATTIME());	/* VSN */

+			st_dword(buf + BPB_FATSz32, sz_fat);		/* FAT size [sector] */

+			st_dword(buf + BPB_RootClus32, 2);			/* Root directory cluster # (2) */

+			st_word(buf + BPB_FSInfo32, 1);				/* Offset of FSINFO sector (VBR + 1) */

+			st_word(buf + BPB_BkBootSec32, 6);			/* Offset of backup VBR (VBR + 6) */

+			buf[BS_DrvNum32] = 0x80;					/* Drive number (for int13) */

+			buf[BS_BootSig32] = 0x29;					/* Extended boot signature */

+			mem_cpy(buf + BS_VolLab32, "NO NAME    " "FAT32   ", 19);	/* Volume label, FAT signature */

+		} else {

+			st_dword(buf + BS_VolID, GET_FATTIME());	/* VSN */

+			st_word(buf + BPB_FATSz16, (WORD)sz_fat);	/* FAT size [sector] */

+			buf[BS_DrvNum] = 0x80;						/* Drive number (for int13) */

+			buf[BS_BootSig] = 0x29;						/* Extended boot signature */

+			mem_cpy(buf + BS_VolLab, "NO NAME    " "FAT     ", 19);	/* Volume label, FAT signature */

+		}

+		st_word(buf + BS_55AA, 0xAA55);					/* Signature (offset is fixed here regardless of sector size) */

+		if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) return FR_DISK_ERR;	/* Write it to the VBR sector */

+

+		/* Create FSINFO record if needed */

+		if (fmt == FS_FAT32) {

+			disk_write(pdrv, buf, b_vol + 6, 1);		/* Write backup VBR (VBR + 6) */

+			mem_set(buf, 0, ss);

+			st_dword(buf + FSI_LeadSig, 0x41615252);

+			st_dword(buf + FSI_StrucSig, 0x61417272);

+			st_dword(buf + FSI_Free_Count, n_clst - 1);	/* Number of free clusters */

+			st_dword(buf + FSI_Nxt_Free, 2);			/* Last allocated cluster# */

+			st_word(buf + BS_55AA, 0xAA55);

+			disk_write(pdrv, buf, b_vol + 7, 1);		/* Write backup FSINFO (VBR + 7) */

+			disk_write(pdrv, buf, b_vol + 1, 1);		/* Write original FSINFO (VBR + 1) */

+		}

+

+		/* Initialize FAT area */

+		mem_set(buf, 0, (UINT)szb_buf);

+		sect = b_fat;		/* FAT start sector */

+		for (i = 0; i < n_fats; i++) {			/* Initialize FATs each */

+			if (fmt == FS_FAT32) {

+				st_dword(buf + 0, 0xFFFFFFF8);	/* Entry 0 */

+				st_dword(buf + 4, 0xFFFFFFFF);	/* Entry 1 */

+				st_dword(buf + 8, 0x0FFFFFFF);	/* Entry 2 (root directory) */

+			} else {

+				st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8);	/* Entry 0 and 1 */

+			}

+			nsect = sz_fat;		/* Number of FAT sectors */

+			do {	/* Fill FAT sectors */

+				n = (nsect > sz_buf) ? sz_buf : nsect;

+				if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;

+				mem_set(buf, 0, ss);

+				sect += n; nsect -= n;

+			} while (nsect);

+		}

+

+		/* Initialize root directory (fill with zero) */

+		nsect = (fmt == FS_FAT32) ? pau : sz_dir;	/* Number of root directory sectors */

+		do {

+			n = (nsect > sz_buf) ? sz_buf : nsect;

+			if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;

+			sect += n; nsect -= n;

+		} while (nsect);

+	}

+

+	/* Determine system ID in the partition table */

+	if (_FS_EXFAT && fmt == FS_EXFAT) {

+		sys = 0x07;			/* HPFS/NTFS/exFAT */

+	} else {

+		if (fmt == FS_FAT32) {

+			sys = 0x0C;		/* FAT32X */

+		} else {

+			if (sz_vol >= 0x10000) {

+				sys = 0x06;	/* FAT12/16 (>=64KS) */

+			} else {

+				sys = (fmt == FS_FAT16) ? 0x04 : 0x01;	/* FAT16 (<64KS) : FAT12 (<64KS) */

+			}

+		}

+	}

+

+	if (_MULTI_PARTITION && part != 0) {

+		/* Update system ID in the partition table */

+		if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;	/* Read the MBR */

+		buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys;		/* Set system type */

+		if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;	/* Write it back to the MBR */

+	} else {

+		if (!(opt & FM_SFD)) {

+			/* Create partition table in FDISK format */

+			mem_set(buf, 0, ss);

+			st_word(buf + BS_55AA, 0xAA55);		/* MBR signature */

+			pte = buf + MBR_Table;				/* Create partition table for single partition in the drive */

+			pte[PTE_Boot] = 0;					/* Boot indicator */

+			pte[PTE_StHead] = 1;				/* Start head */

+			pte[PTE_StSec] = 1;					/* Start sector */

+			pte[PTE_StCyl] = 0;					/* Start cylinder */

+			pte[PTE_System] = sys;				/* System type */

+			n = (b_vol + sz_vol) / (63 * 255);	/* (End CHS is incorrect) */

+			pte[PTE_EdHead] = 254;				/* End head */

+			pte[PTE_EdSec] = (BYTE)(n >> 2 | 63);	/* End sector */

+			pte[PTE_EdCyl] = (BYTE)n;			/* End cylinder */

+			st_dword(pte + PTE_StLba, b_vol);	/* Start offset in LBA */

+			st_dword(pte + PTE_SizLba, sz_vol);	/* Size in sectors */

+			if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;	/* Write it to the MBR */

+		}

+	}

+

+	if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) return FR_DISK_ERR;

+

+	return FR_OK;

+}

+

+

+

+#if _MULTI_PARTITION

+/*-----------------------------------------------------------------------*/

+/* Create partition table on the physical drive                          */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_fdisk (

+	BYTE pdrv,			/* Physical drive number */

+	const DWORD* szt,	/* Pointer to the size table for each partitions */

+	void* work			/* Pointer to the working buffer */

+)

+{

+	UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;

+	BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;

+	DSTATUS stat;

+	DWORD sz_disk, sz_part, s_part;

+

+

+	stat = disk_initialize(pdrv);

+	if (stat & STA_NOINIT) return FR_NOT_READY;

+	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;

+	if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;

+

+	/* Determine the CHS without any care of the drive geometry */

+	for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;

+	if (n == 256) n--;

+	e_hd = n - 1;

+	sz_cyl = 63 * n;

+	tot_cyl = sz_disk / sz_cyl;

+

+	/* Create partition table */

+	mem_set(buf, 0, _MAX_SS);

+	p = buf + MBR_Table; b_cyl = 0;

+	for (i = 0; i < 4; i++, p += SZ_PTE) {

+		p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;

+		if (!p_cyl) continue;

+		s_part = (DWORD)sz_cyl * b_cyl;

+		sz_part = (DWORD)sz_cyl * p_cyl;

+		if (i == 0) {	/* Exclude first track of cylinder 0 */

+			s_hd = 1;

+			s_part += 63; sz_part -= 63;

+		} else {

+			s_hd = 0;

+		}

+		e_cyl = b_cyl + p_cyl - 1;

+		if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;

+

+		/* Set partition table */

+		p[1] = s_hd;						/* Start head */

+		p[2] = (BYTE)((b_cyl >> 2) + 1);	/* Start sector */

+		p[3] = (BYTE)b_cyl;					/* Start cylinder */

+		p[4] = 0x06;						/* System type (temporary setting) */

+		p[5] = e_hd;						/* End head */

+		p[6] = (BYTE)((e_cyl >> 2) + 63);	/* End sector */

+		p[7] = (BYTE)e_cyl;					/* End cylinder */

+		st_dword(p + 8, s_part);			/* Start sector in LBA */

+		st_dword(p + 12, sz_part);			/* Partition size */

+

+		/* Next partition */

+		b_cyl += p_cyl;

+	}

+	st_word(p, 0xAA55);

+

+	/* Write it to the MBR */

+	return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;

+}

+

+#endif /* _MULTI_PARTITION */

+#endif /* _USE_MKFS && !_FS_READONLY */

+

+

+

+

+#if _USE_STRFUNC

+/*-----------------------------------------------------------------------*/

+/* Get a string from the file                                            */

+/*-----------------------------------------------------------------------*/

+

+TCHAR* f_gets (

+	TCHAR* buff,	/* Pointer to the string buffer to read */

+	int len,		/* Size of string buffer (characters) */

+	FIL* fp			/* Pointer to the file object */

+)

+{

+	int n = 0;

+	TCHAR c, *p = buff;

+	BYTE s[2];

+	UINT rc;

+

+

+	while (n < len - 1) {	/* Read characters until buffer gets filled */

+#if _LFN_UNICODE

+#if _STRF_ENCODE == 3		/* Read a character in UTF-8 */

+		f_read(fp, s, 1, &rc);

+		if (rc != 1) break;

+		c = s[0];

+		if (c >= 0x80) {

+			if (c < 0xC0) continue;	/* Skip stray trailer */

+			if (c < 0xE0) {			/* Two-byte sequence */

+				f_read(fp, s, 1, &rc);

+				if (rc != 1) break;

+				c = (c & 0x1F) << 6 | (s[0] & 0x3F);

+				if (c < 0x80) c = '?';

+			} else {

+				if (c < 0xF0) {		/* Three-byte sequence */

+					f_read(fp, s, 2, &rc);

+					if (rc != 2) break;

+					c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F);

+					if (c < 0x800) c = '?';

+				} else {			/* Reject four-byte sequence */

+					c = '?';

+				}

+			}

+		}

+#elif _STRF_ENCODE == 2		/* Read a character in UTF-16BE */

+		f_read(fp, s, 2, &rc);

+		if (rc != 2) break;

+		c = s[1] + (s[0] << 8);

+#elif _STRF_ENCODE == 1		/* Read a character in UTF-16LE */

+		f_read(fp, s, 2, &rc);

+		if (rc != 2) break;

+		c = s[0] + (s[1] << 8);

+#else						/* Read a character in ANSI/OEM */

+		f_read(fp, s, 1, &rc);

+		if (rc != 1) break;

+		c = s[0];

+		if (IsDBCS1(c)) {

+			f_read(fp, s, 1, &rc);

+			if (rc != 1) break;

+			c = (c << 8) + s[0];

+		}

+		c = ff_convert(c, 1);	/* OEM -> Unicode */

+		if (!c) c = '?';

+#endif

+#else						/* Read a character without conversion */

+		f_read(fp, s, 1, &rc);

+		if (rc != 1) break;

+		c = s[0];

+#endif

+		if (_USE_STRFUNC == 2 && c == '\r') continue;	/* Strip '\r' */

+		*p++ = c;

+		n++;

+		if (c == '\n') break;		/* Break on EOL */

+	}

+	*p = 0;

+	return n ? buff : 0;			/* When no data read (eof or error), return with error. */

+}

+

+

+

+

+#if !_FS_READONLY

+#include <stdarg.h>

+/*-----------------------------------------------------------------------*/

+/* Put a character to the file                                           */

+/*-----------------------------------------------------------------------*/

+

+typedef struct {

+	FIL *fp;		/* Ptr to the writing file */

+	int idx, nchr;	/* Write index of buf[] (-1:error), number of chars written */

+	BYTE buf[64];	/* Write buffer */

+} putbuff;

+

+

+static

+void putc_bfd (		/* Buffered write with code conversion */

+	putbuff* pb,

+	TCHAR c

+)

+{

+	UINT bw;

+	int i;

+

+

+	if (_USE_STRFUNC == 2 && c == '\n') {	 /* LF -> CRLF conversion */

+		putc_bfd(pb, '\r');

+	}

+

+	i = pb->idx;		/* Write index of pb->buf[] */

+	if (i < 0) return;

+

+#if _LFN_UNICODE

+#if _STRF_ENCODE == 3			/* Write a character in UTF-8 */

+	if (c < 0x80) {				/* 7-bit */

+		pb->buf[i++] = (BYTE)c;

+	} else {

+		if (c < 0x800) {		/* 11-bit */

+			pb->buf[i++] = (BYTE)(0xC0 | c >> 6);

+		} else {				/* 16-bit */

+			pb->buf[i++] = (BYTE)(0xE0 | c >> 12);

+			pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));

+		}

+		pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));

+	}

+#elif _STRF_ENCODE == 2			/* Write a character in UTF-16BE */

+	pb->buf[i++] = (BYTE)(c >> 8);

+	pb->buf[i++] = (BYTE)c;

+#elif _STRF_ENCODE == 1			/* Write a character in UTF-16LE */

+	pb->buf[i++] = (BYTE)c;

+	pb->buf[i++] = (BYTE)(c >> 8);

+#else							/* Write a character in ANSI/OEM */

+	c = ff_convert(c, 0);	/* Unicode -> OEM */

+	if (!c) c = '?';

+	if (c >= 0x100)

+		pb->buf[i++] = (BYTE)(c >> 8);

+	pb->buf[i++] = (BYTE)c;

+#endif

+#else							/* Write a character without conversion */

+	pb->buf[i++] = (BYTE)c;

+#endif

+

+	if (i >= (int)(sizeof pb->buf) - 3) {	/* Write buffered characters to the file */

+		f_write(pb->fp, pb->buf, (UINT)i, &bw);

+		i = (bw == (UINT)i) ? 0 : -1;

+	}

+	pb->idx = i;

+	pb->nchr++;

+}

+

+

+static

+int putc_flush (		/* Flush left characters in the buffer */

+	putbuff* pb

+)

+{

+	UINT nw;

+

+	if (   pb->idx >= 0	/* Flush buffered characters to the file */

+		&& f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK

+		&& (UINT)pb->idx == nw) return pb->nchr;

+	return EOF;

+}

+

+

+static

+void putc_init (		/* Initialize write buffer */

+	putbuff* pb,

+	FIL* fp

+)

+{

+	pb->fp = fp;

+	pb->nchr = pb->idx = 0;

+}

+

+

+

+int f_putc (

+	TCHAR c,	/* A character to be output */

+	FIL* fp		/* Pointer to the file object */

+)

+{

+	putbuff pb;

+

+

+	putc_init(&pb, fp);

+	putc_bfd(&pb, c);	/* Put the character */

+	return putc_flush(&pb);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Put a string to the file                                              */

+/*-----------------------------------------------------------------------*/

+

+int f_puts (

+	const TCHAR* str,	/* Pointer to the string to be output */

+	FIL* fp				/* Pointer to the file object */

+)

+{

+	putbuff pb;

+

+

+	putc_init(&pb, fp);

+	while (*str) putc_bfd(&pb, *str++);		/* Put the string */

+	return putc_flush(&pb);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Put a formatted string to the file                                    */

+/*-----------------------------------------------------------------------*/

+

+int f_printf (

+	FIL* fp,			/* Pointer to the file object */

+	const TCHAR* fmt,	/* Pointer to the format string */

+	...					/* Optional arguments... */

+)

+{

+	va_list arp;

+	putbuff pb;

+	BYTE f, r;

+	UINT i, j, w;

+	DWORD v;

+	TCHAR c, d, str[32], *p;

+

+

+	putc_init(&pb, fp);

+

+	va_start(arp, fmt);

+

+	for (;;) {

+		c = *fmt++;

+		if (c == 0) break;			/* End of string */

+		if (c != '%') {				/* Non escape character */

+			putc_bfd(&pb, c);

+			continue;

+		}

+		w = f = 0;

+		c = *fmt++;

+		if (c == '0') {				/* Flag: '0' padding */

+			f = 1; c = *fmt++;

+		} else {

+			if (c == '-') {			/* Flag: left justified */

+				f = 2; c = *fmt++;

+			}

+		}

+		while (IsDigit(c)) {		/* Precision */

+			w = w * 10 + c - '0';

+			c = *fmt++;

+		}

+		if (c == 'l' || c == 'L') {	/* Prefix: Size is long int */

+			f |= 4; c = *fmt++;

+		}

+		if (!c) break;

+		d = c;

+		if (IsLower(d)) d -= 0x20;

+		switch (d) {				/* Type is... */

+		case 'S' :					/* String */

+			p = va_arg(arp, TCHAR*);

+			for (j = 0; p[j]; j++) ;

+			if (!(f & 2)) {

+				while (j++ < w) putc_bfd(&pb, ' ');

+			}

+			while (*p) putc_bfd(&pb, *p++);

+			while (j++ < w) putc_bfd(&pb, ' ');

+			continue;

+		case 'C' :					/* Character */

+			putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;

+		case 'B' :					/* Binary */

+			r = 2; break;

+		case 'O' :					/* Octal */

+			r = 8; break;

+		case 'D' :					/* Signed decimal */

+		case 'U' :					/* Unsigned decimal */

+			r = 10; break;

+		case 'X' :					/* Hexdecimal */

+			r = 16; break;

+		default:					/* Unknown type (pass-through) */

+			putc_bfd(&pb, c); continue;

+		}

+

+		/* Get an argument and put it in numeral */

+		v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));

+		if (d == 'D' && (v & 0x80000000)) {

+			v = 0 - v;

+			f |= 8;

+		}

+		i = 0;

+		do {

+			d = (TCHAR)(v % r); v /= r;

+			if (d > 9) d += (c == 'x') ? 0x27 : 0x07;

+			str[i++] = d + '0';

+		} while (v && i < sizeof str / sizeof str[0]);

+		if (f & 8) str[i++] = '-';

+		j = i; d = (f & 1) ? '0' : ' ';

+		while (!(f & 2) && j++ < w) putc_bfd(&pb, d);

+		do putc_bfd(&pb, str[--i]); while (i);

+		while (j++ < w) putc_bfd(&pb, d);

+	}

+

+	va_end(arp);

+

+	return putc_flush(&pb);

+}

+

+#endif /* !_FS_READONLY */

+#endif /* _USE_STRFUNC */

diff --git a/ff.h b/ff.h
new file mode 100644
index 0000000..981a886
--- /dev/null
+++ b/ff.h
@@ -0,0 +1,366 @@
+/*----------------------------------------------------------------------------/

+/  FatFs - Generic FAT file system module  R0.12b                             /

+/-----------------------------------------------------------------------------/

+/

+/ Copyright (C) 2016, ChaN, all right reserved.

+/

+/ FatFs module is an open source software. Redistribution and use of FatFs in

+/ source and binary forms, with or without modification, are permitted provided

+/ that the following condition is met:

+

+/ 1. Redistributions of source code must retain the above copyright notice,

+/    this condition and the following disclaimer.

+/

+/ This software is provided by the copyright holder and contributors "AS IS"

+/ and any warranties related to this software are DISCLAIMED.

+/ The copyright owner or contributors be NOT LIABLE for any damages caused

+/ by use of this software.

+/----------------------------------------------------------------------------*/

+

+

+#ifndef _FATFS

+#define _FATFS	68020	/* Revision ID */

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+

+#include "integer.h"	/* Basic integer types */

+#include "ffconf.h"		/* FatFs configuration options */

+

+#if _FATFS != _FFCONF

+#error Wrong configuration file (ffconf.h).

+#endif

+

+

+

+/* Definitions of volume management */

+

+#if _MULTI_PARTITION		/* Multiple partition configuration */

+typedef struct {

+	BYTE pd;	/* Physical drive number */

+	BYTE pt;	/* Partition: 0:Auto detect, 1-4:Forced partition) */

+} PARTITION;

+extern PARTITION VolToPart[];	/* Volume - Partition resolution table */

+#define LD2PD(vol) (VolToPart[vol].pd)	/* Get physical drive number */

+#define LD2PT(vol) (VolToPart[vol].pt)	/* Get partition index */

+

+#else							/* Single partition configuration */

+#define LD2PD(vol) (BYTE)(vol)	/* Each logical drive is bound to the same physical drive number */

+#define LD2PT(vol) 0			/* Find first valid partition or in SFD */

+

+#endif

+

+

+

+/* Type of path name strings on FatFs API */

+

+#if _LFN_UNICODE			/* Unicode (UTF-16) string */

+#if _USE_LFN == 0

+#error _LFN_UNICODE must be 0 at non-LFN cfg.

+#endif

+#ifndef _INC_TCHAR

+typedef WCHAR TCHAR;

+#define _T(x) L ## x

+#define _TEXT(x) L ## x

+#endif

+#else						/* ANSI/OEM string */

+#ifndef _INC_TCHAR

+typedef char TCHAR;

+#define _T(x) x

+#define _TEXT(x) x

+#endif

+#endif

+

+

+

+/* Type of file size variables */

+

+#if _FS_EXFAT

+#if _USE_LFN == 0

+#error LFN must be enabled when enable exFAT

+#endif

+typedef QWORD FSIZE_t;

+#else

+typedef DWORD FSIZE_t;

+#endif

+

+

+

+/* File system object structure (FATFS) */

+

+typedef struct {

+	BYTE	fs_type;		/* File system type (0:N/A) */

+	BYTE	drv;			/* Physical drive number */

+	BYTE	n_fats;			/* Number of FATs (1 or 2) */

+	BYTE	wflag;			/* win[] flag (b0:dirty) */

+	BYTE	fsi_flag;		/* FSINFO flags (b7:disabled, b0:dirty) */

+	WORD	id;				/* File system mount ID */

+	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */

+	WORD	csize;			/* Cluster size [sectors] */

+#if _MAX_SS != _MIN_SS

+	WORD	ssize;			/* Sector size (512, 1024, 2048 or 4096) */

+#endif

+#if _USE_LFN != 0

+	WCHAR*	lfnbuf;			/* LFN working buffer */

+#endif

+#if _FS_EXFAT

+	BYTE*	dirbuf;			/* Directory entry block scratchpad buffer */

+#endif

+#if _FS_REENTRANT

+	_SYNC_t	sobj;			/* Identifier of sync object */

+#endif

+#if !_FS_READONLY

+	DWORD	last_clst;		/* Last allocated cluster */

+	DWORD	free_clst;		/* Number of free clusters */

+#endif

+#if _FS_RPATH != 0

+	DWORD	cdir;			/* Current directory start cluster (0:root) */

+#if _FS_EXFAT

+	DWORD	cdc_scl;		/* Containing directory start cluster (invalid when cdir is 0) */

+	DWORD	cdc_size;		/* b31-b8:Size of containing directory, b7-b0: Chain status */

+	DWORD	cdc_ofs;		/* Offset in the containing directory (invalid when cdir is 0) */

+#endif

+#endif

+	DWORD	n_fatent;		/* Number of FAT entries (number of clusters + 2) */

+	DWORD	fsize;			/* Size of an FAT [sectors] */

+	DWORD	volbase;		/* Volume base sector */

+	DWORD	fatbase;		/* FAT base sector */

+	DWORD	dirbase;		/* Root directory base sector/cluster */

+	DWORD	database;		/* Data base sector */

+	DWORD	winsect;		/* Current sector appearing in the win[] */

+	BYTE	win[_MAX_SS];	/* Disk access window for Directory, FAT (and file data at tiny cfg) */

+} FATFS;

+

+

+

+/* Object ID and allocation information (_FDID) */

+

+typedef struct {

+	FATFS*	fs;			/* Pointer to the owner file system object */

+	WORD	id;			/* Owner file system mount ID */

+	BYTE	attr;		/* Object attribute */

+	BYTE	stat;		/* Object chain status (b1-0: =0:not contiguous, =2:contiguous (no data on FAT), =3:got flagmented, b2:sub-directory stretched) */

+	DWORD	sclust;		/* Object start cluster (0:no cluster or root directory) */

+	FSIZE_t	objsize;	/* Object size (valid when sclust != 0) */

+#if _FS_EXFAT

+	DWORD	n_cont;		/* Size of coutiguous part, clusters - 1 (valid when stat == 3) */

+	DWORD	c_scl;		/* Containing directory start cluster (valid when sclust != 0) */

+	DWORD	c_size;		/* b31-b8:Size of containing directory, b7-b0: Chain status (valid when c_scl != 0) */

+	DWORD	c_ofs;		/* Offset in the containing directory (valid when sclust != 0) */

+#endif

+#if _FS_LOCK != 0

+	UINT	lockid;		/* File lock ID origin from 1 (index of file semaphore table Files[]) */

+#endif

+} _FDID;

+

+

+

+/* File object structure (FIL) */

+

+typedef struct {

+	_FDID	obj;			/* Object identifier (must be the 1st member to detect invalid object pointer) */

+	BYTE	flag;			/* File status flags */

+	BYTE	err;			/* Abort flag (error code) */

+	FSIZE_t	fptr;			/* File read/write pointer (Zeroed on file open) */

+	DWORD	clust;			/* Current cluster of fpter (invalid when fprt is 0) */

+	DWORD	sect;			/* Sector number appearing in buf[] (0:invalid) */

+#if !_FS_READONLY

+	DWORD	dir_sect;		/* Sector number containing the directory entry */

+	BYTE*	dir_ptr;		/* Pointer to the directory entry in the win[] */

+#endif

+#if _USE_FASTSEEK

+	DWORD*	cltbl;			/* Pointer to the cluster link map table (nulled on open, set by application) */

+#endif

+#if !_FS_TINY

+	BYTE	buf[_MAX_SS];	/* File private data read/write window */

+#endif

+} FIL;

+

+

+

+/* Directory object structure (DIR) */

+

+typedef struct {

+	_FDID	obj;			/* Object identifier */

+	DWORD	dptr;			/* Current read/write offset */

+	DWORD	clust;			/* Current cluster */

+	DWORD	sect;			/* Current sector */

+	BYTE*	dir;			/* Pointer to the directory item in the win[] */

+	BYTE	fn[12];			/* SFN (in/out) {body[8],ext[3],status[1]} */

+#if _USE_LFN != 0

+	DWORD	blk_ofs;		/* Offset of current entry block being processed (0xFFFFFFFF:Invalid) */

+#endif

+#if _USE_FIND

+	const TCHAR* pat;		/* Pointer to the name matching pattern */

+#endif

+} DIR;

+

+

+

+/* File information structure (FILINFO) */

+

+typedef struct {

+	FSIZE_t	fsize;			/* File size */

+	WORD	fdate;			/* Modified date */

+	WORD	ftime;			/* Modified time */

+	BYTE	fattrib;		/* File attribute */

+#if _USE_LFN != 0

+	TCHAR	altname[13];			/* Altenative file name */

+	TCHAR	fname[_MAX_LFN + 1];	/* Primary file name */

+#else

+	TCHAR	fname[13];		/* File name */

+#endif

+} FILINFO;

+

+

+

+/* File function return code (FRESULT) */

+

+typedef enum {

+	FR_OK = 0,				/* (0) Succeeded */

+	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */

+	FR_INT_ERR,				/* (2) Assertion failed */

+	FR_NOT_READY,			/* (3) The physical drive cannot work */

+	FR_NO_FILE,				/* (4) Could not find the file */

+	FR_NO_PATH,				/* (5) Could not find the path */

+	FR_INVALID_NAME,		/* (6) The path name format is invalid */

+	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */

+	FR_EXIST,				/* (8) Access denied due to prohibited access */

+	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */

+	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */

+	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */

+	FR_NOT_ENABLED,			/* (12) The volume has no work area */

+	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */

+	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any problem */

+	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */

+	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policy */

+	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */

+	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > _FS_LOCK */

+	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */

+} FRESULT;

+

+

+

+/*--------------------------------------------------------------*/

+/* FatFs module application interface                           */

+

+FRESULT f_open (FIL* fp, const TCHAR* path, BYTE mode);				/* Open or create a file */

+FRESULT f_close (FIL* fp);											/* Close an open file object */

+FRESULT f_read (FIL* fp, void* buff, UINT btr, UINT* br);			/* Read data from the file */

+FRESULT f_write (FIL* fp, const void* buff, UINT btw, UINT* bw);	/* Write data to the file */

+FRESULT f_lseek (FIL* fp, FSIZE_t ofs);								/* Move file pointer of the file object */

+FRESULT f_truncate (FIL* fp);										/* Truncate the file */

+FRESULT f_sync (FIL* fp);											/* Flush cached data of the writing file */

+FRESULT f_opendir (DIR* dp, const TCHAR* path);						/* Open a directory */

+FRESULT f_closedir (DIR* dp);										/* Close an open directory */

+FRESULT f_readdir (DIR* dp, FILINFO* fno);							/* Read a directory item */

+FRESULT f_findfirst (DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern);	/* Find first file */

+FRESULT f_findnext (DIR* dp, FILINFO* fno);							/* Find next file */

+FRESULT f_mkdir (const TCHAR* path);								/* Create a sub directory */

+FRESULT f_unlink (const TCHAR* path);								/* Delete an existing file or directory */

+FRESULT f_rename (const TCHAR* path_old, const TCHAR* path_new);	/* Rename/Move a file or directory */

+FRESULT f_stat (const TCHAR* path, FILINFO* fno);					/* Get file status */

+FRESULT f_chmod (const TCHAR* path, BYTE attr, BYTE mask);			/* Change attribute of a file/dir */

+FRESULT f_utime (const TCHAR* path, const FILINFO* fno);			/* Change timestamp of a file/dir */

+FRESULT f_chdir (const TCHAR* path);								/* Change current directory */

+FRESULT f_chdrive (const TCHAR* path);								/* Change current drive */

+FRESULT f_getcwd (TCHAR* buff, UINT len);							/* Get current directory */

+FRESULT f_getfree (const TCHAR* path, DWORD* nclst, FATFS** fatfs);	/* Get number of free clusters on the drive */

+FRESULT f_getlabel (const TCHAR* path, TCHAR* label, DWORD* vsn);	/* Get volume label */

+FRESULT f_setlabel (const TCHAR* label);							/* Set volume label */

+FRESULT f_forward (FIL* fp, UINT(*func)(const BYTE*,UINT), UINT btf, UINT* bf);	/* Forward data to the stream */

+FRESULT f_expand (FIL* fp, FSIZE_t szf, BYTE opt);					/* Allocate a contiguous block to the file */

+FRESULT f_mount (FATFS* fs, const TCHAR* path, BYTE opt);			/* Mount/Unmount a logical drive */

+FRESULT f_mkfs (const TCHAR* path, BYTE opt, DWORD au, void* work, UINT len);	/* Create a FAT volume */

+FRESULT f_fdisk (BYTE pdrv, const DWORD* szt, void* work);			/* Divide a physical drive into some partitions */

+int f_putc (TCHAR c, FIL* fp);										/* Put a character to the file */

+int f_puts (const TCHAR* str, FIL* cp);								/* Put a string to the file */

+int f_printf (FIL* fp, const TCHAR* str, ...);						/* Put a formatted string to the file */

+TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);						/* Get a string from the file */

+

+#define f_eof(fp) ((int)((fp)->fptr == (fp)->obj.objsize))

+#define f_error(fp) ((fp)->err)

+#define f_tell(fp) ((fp)->fptr)

+#define f_size(fp) ((fp)->obj.objsize)

+#define f_rewind(fp) f_lseek((fp), 0)

+#define f_rewinddir(dp) f_readdir((dp), 0)

+

+#ifndef EOF

+#define EOF (-1)

+#endif

+

+

+

+

+/*--------------------------------------------------------------*/

+/* Additional user defined functions                            */

+

+/* RTC function */

+#if !_FS_READONLY && !_FS_NORTC

+DWORD get_fattime (void);

+#endif

+

+/* Unicode support functions */

+#if _USE_LFN != 0						/* Unicode - OEM code conversion */

+WCHAR ff_convert (WCHAR chr, UINT dir);	/* OEM-Unicode bidirectional conversion */

+WCHAR ff_wtoupper (WCHAR chr);			/* Unicode upper-case conversion */

+#if _USE_LFN == 3						/* Memory functions */

+void* ff_memalloc (UINT msize);			/* Allocate memory block */

+void ff_memfree (void* mblock);			/* Free memory block */

+#endif

+#endif

+

+/* Sync functions */

+#if _FS_REENTRANT

+int ff_cre_syncobj (BYTE vol, _SYNC_t* sobj);	/* Create a sync object */

+int ff_req_grant (_SYNC_t sobj);				/* Lock sync object */

+void ff_rel_grant (_SYNC_t sobj);				/* Unlock sync object */

+int ff_del_syncobj (_SYNC_t sobj);				/* Delete a sync object */

+#endif

+

+

+

+

+/*--------------------------------------------------------------*/

+/* Flags and offset address                                     */

+

+

+/* File access mode and open method flags (3rd argument of f_open) */

+#define	FA_READ				0x01

+#define	FA_WRITE			0x02

+#define	FA_OPEN_EXISTING	0x00

+#define	FA_CREATE_NEW		0x04

+#define	FA_CREATE_ALWAYS	0x08

+#define	FA_OPEN_ALWAYS		0x10

+#define	FA_OPEN_APPEND		0x30

+

+/* Fast seek controls (2nd argument of f_lseek) */

+#define CREATE_LINKMAP	((FSIZE_t)0 - 1)

+

+/* Format options (2nd argument of f_mkfs) */

+#define FM_FAT		0x01

+#define FM_FAT32	0x02

+#define FM_EXFAT	0x04

+#define FM_ANY		0x07

+#define FM_SFD		0x08

+

+/* Filesystem type (FATFS.fs_type) */

+#define FS_FAT12	1

+#define FS_FAT16	2

+#define FS_FAT32	3

+#define FS_EXFAT	4

+

+/* File attribute bits for directory entry (FILINFO.fattrib) */

+#define	AM_RDO	0x01	/* Read only */

+#define	AM_HID	0x02	/* Hidden */

+#define	AM_SYS	0x04	/* System */

+#define AM_DIR	0x10	/* Directory */

+#define AM_ARC	0x20	/* Archive */

+

+

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* _FATFS */

diff --git a/ffconf.h b/ffconf.h
new file mode 100644
index 0000000..a622438
--- /dev/null
+++ b/ffconf.h
@@ -0,0 +1,267 @@
+/*---------------------------------------------------------------------------/

+/  FatFs - FAT file system module configuration file

+/---------------------------------------------------------------------------*/

+

+#define _FFCONF 68020	/* Revision ID */

+

+/*---------------------------------------------------------------------------/

+/ Function Configurations

+/---------------------------------------------------------------------------*/

+

+#define _FS_READONLY	1

+/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)

+/  Read-only configuration removes writing API functions, f_write(), f_sync(),

+/  f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()

+/  and optional writing functions as well. */

+

+

+#define _FS_MINIMIZE	0

+/* This option defines minimization level to remove some basic API functions.

+/

+/   0: All basic functions are enabled.

+/   1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()

+/      are removed.

+/   2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.

+/   3: f_lseek() function is removed in addition to 2. */

+

+

+#define	_USE_STRFUNC	0

+/* This option switches string functions, f_gets(), f_putc(), f_puts() and

+/  f_printf().

+/

+/  0: Disable string functions.

+/  1: Enable without LF-CRLF conversion.

+/  2: Enable with LF-CRLF conversion. */

+

+

+#define _USE_FIND		0

+/* This option switches filtered directory read functions, f_findfirst() and

+/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */

+

+

+#define	_USE_MKFS		0

+/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */

+

+

+#define	_USE_FASTSEEK	0

+/* This option switches fast seek function. (0:Disable or 1:Enable) */

+

+

+#define	_USE_EXPAND		0

+/* This option switches f_expand function. (0:Disable or 1:Enable) */

+

+

+#define _USE_CHMOD		0

+/* This option switches attribute manipulation functions, f_chmod() and f_utime().

+/  (0:Disable or 1:Enable) Also _FS_READONLY needs to be 0 to enable this option. */

+

+

+#define _USE_LABEL		0

+/* This option switches volume label functions, f_getlabel() and f_setlabel().

+/  (0:Disable or 1:Enable) */

+

+

+#define	_USE_FORWARD	0

+/* This option switches f_forward() function. (0:Disable or 1:Enable) */

+

+

+/*---------------------------------------------------------------------------/

+/ Locale and Namespace Configurations

+/---------------------------------------------------------------------------*/

+

+#define _CODE_PAGE	932

+/* This option specifies the OEM code page to be used on the target system.

+/  Incorrect setting of the code page can cause a file open failure.

+/

+/   1   - ASCII (No extended character. Non-LFN cfg. only)

+/   437 - U.S.

+/   720 - Arabic

+/   737 - Greek

+/   771 - KBL

+/   775 - Baltic

+/   850 - Latin 1

+/   852 - Latin 2

+/   855 - Cyrillic

+/   857 - Turkish

+/   860 - Portuguese

+/   861 - Icelandic

+/   862 - Hebrew

+/   863 - Canadian French

+/   864 - Arabic

+/   865 - Nordic

+/   866 - Russian

+/   869 - Greek 2

+/   932 - Japanese (DBCS)

+/   936 - Simplified Chinese (DBCS)

+/   949 - Korean (DBCS)

+/   950 - Traditional Chinese (DBCS)

+*/

+

+

+#define	_USE_LFN	0

+#define	_MAX_LFN	255

+/* The _USE_LFN switches the support of long file name (LFN).

+/

+/   0: Disable support of LFN. _MAX_LFN has no effect.

+/   1: Enable LFN with static working buffer on the BSS. Always NOT thread-safe.

+/   2: Enable LFN with dynamic working buffer on the STACK.

+/   3: Enable LFN with dynamic working buffer on the HEAP.

+/

+/  To enable the LFN, Unicode handling functions (option/unicode.c) must be added

+/  to the project. The working buffer occupies (_MAX_LFN + 1) * 2 bytes and

+/  additional 608 bytes at exFAT enabled. _MAX_LFN can be in range from 12 to 255.

+/  It should be set 255 to support full featured LFN operations.

+/  When use stack for the working buffer, take care on stack overflow. When use heap

+/  memory for the working buffer, memory management functions, ff_memalloc() and

+/  ff_memfree(), must be added to the project. */

+

+

+#define	_LFN_UNICODE	0

+/* This option switches character encoding on the API. (0:ANSI/OEM or 1:UTF-16)

+/  To use Unicode string for the path name, enable LFN and set _LFN_UNICODE = 1.

+/  This option also affects behavior of string I/O functions. */

+

+

+#define _STRF_ENCODE	3

+/* When _LFN_UNICODE == 1, this option selects the character encoding ON THE FILE to

+/  be read/written via string I/O functions, f_gets(), f_putc(), f_puts and f_printf().

+/

+/  0: ANSI/OEM

+/  1: UTF-16LE

+/  2: UTF-16BE

+/  3: UTF-8

+/

+/  This option has no effect when _LFN_UNICODE == 0. */

+

+

+#define _FS_RPATH	0

+/* This option configures support of relative path.

+/

+/   0: Disable relative path and remove related functions.

+/   1: Enable relative path. f_chdir() and f_chdrive() are available.

+/   2: f_getcwd() function is available in addition to 1.

+*/

+

+

+/*---------------------------------------------------------------------------/

+/ Drive/Volume Configurations

+/---------------------------------------------------------------------------*/

+

+#define _VOLUMES	1

+/* Number of volumes (logical drives) to be used. */

+

+

+#define _STR_VOLUME_ID	0

+#define _VOLUME_STRS	"RAM","NAND","CF","SD","SD2","USB","USB2","USB3"

+/* _STR_VOLUME_ID switches string support of volume ID.

+/  When _STR_VOLUME_ID is set to 1, also pre-defined strings can be used as drive

+/  number in the path name. _VOLUME_STRS defines the drive ID strings for each

+/  logical drives. Number of items must be equal to _VOLUMES. Valid characters for

+/  the drive ID strings are: A-Z and 0-9. */

+

+

+#define	_MULTI_PARTITION	0

+/* This option switches support of multi-partition on a physical drive.

+/  By default (0), each logical drive number is bound to the same physical drive

+/  number and only an FAT volume found on the physical drive will be mounted.

+/  When multi-partition is enabled (1), each logical drive number can be bound to

+/  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()

+/  funciton will be available. */

+

+

+#define	_MIN_SS		512

+#define	_MAX_SS		512

+/* These options configure the range of sector size to be supported. (512, 1024,

+/  2048 or 4096) Always set both 512 for most systems, all type of memory cards and

+/  harddisk. But a larger value may be required for on-board flash memory and some

+/  type of optical media. When _MAX_SS is larger than _MIN_SS, FatFs is configured

+/  to variable sector size and GET_SECTOR_SIZE command must be implemented to the

+/  disk_ioctl() function. */

+

+

+#define	_USE_TRIM	0

+/* This option switches support of ATA-TRIM. (0:Disable or 1:Enable)

+/  To enable Trim function, also CTRL_TRIM command should be implemented to the

+/  disk_ioctl() function. */

+

+

+#define _FS_NOFSINFO	0

+/* If you need to know correct free space on the FAT32 volume, set bit 0 of this

+/  option, and f_getfree() function at first time after volume mount will force

+/  a full FAT scan. Bit 1 controls the use of last allocated cluster number.

+/

+/  bit0=0: Use free cluster count in the FSINFO if available.

+/  bit0=1: Do not trust free cluster count in the FSINFO.

+/  bit1=0: Use last allocated cluster number in the FSINFO if available.

+/  bit1=1: Do not trust last allocated cluster number in the FSINFO.

+*/

+

+

+

+/*---------------------------------------------------------------------------/

+/ System Configurations

+/---------------------------------------------------------------------------*/

+

+#define	_FS_TINY	0

+/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)

+/  At the tiny configuration, size of file object (FIL) is reduced _MAX_SS bytes.

+/  Instead of private sector buffer eliminated from the file object, common sector

+/  buffer in the file system object (FATFS) is used for the file data transfer. */

+

+

+#define _FS_EXFAT	0

+/* This option switches support of exFAT file system. (0:Disable or 1:Enable)

+/  When enable exFAT, also LFN needs to be enabled. (_USE_LFN >= 1)

+/  Note that enabling exFAT discards C89 compatibility. */

+

+

+#define _FS_NORTC	0

+#define _NORTC_MON	1

+#define _NORTC_MDAY	1

+#define _NORTC_YEAR	2016

+/* The option _FS_NORTC switches timestamp functiton. If the system does not have

+/  any RTC function or valid timestamp is not needed, set _FS_NORTC = 1 to disable

+/  the timestamp function. All objects modified by FatFs will have a fixed timestamp

+/  defined by _NORTC_MON, _NORTC_MDAY and _NORTC_YEAR in local time.

+/  To enable timestamp function (_FS_NORTC = 0), get_fattime() function need to be

+/  added to the project to get current time form real-time clock. _NORTC_MON,

+/  _NORTC_MDAY and _NORTC_YEAR have no effect. 

+/  These options have no effect at read-only configuration (_FS_READONLY = 1). */

+

+

+#define	_FS_LOCK	0

+/* The option _FS_LOCK switches file lock function to control duplicated file open

+/  and illegal operation to open objects. This option must be 0 when _FS_READONLY

+/  is 1.

+/

+/  0:  Disable file lock function. To avoid volume corruption, application program

+/      should avoid illegal open, remove and rename to the open objects.

+/  >0: Enable file lock function. The value defines how many files/sub-directories

+/      can be opened simultaneously under file lock control. Note that the file

+/      lock control is independent of re-entrancy. */

+

+

+#define _FS_REENTRANT	0

+#define _FS_TIMEOUT		1000

+#define	_SYNC_t			HANDLE

+/* The option _FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs

+/  module itself. Note that regardless of this option, file access to different

+/  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()

+/  and f_fdisk() function, are always not re-entrant. Only file/directory access

+/  to the same volume is under control of this function.

+/

+/   0: Disable re-entrancy. _FS_TIMEOUT and _SYNC_t have no effect.

+/   1: Enable re-entrancy. Also user provided synchronization handlers,

+/      ff_req_grant(), ff_rel_grant(), ff_del_syncobj() and ff_cre_syncobj()

+/      function, must be added to the project. Samples are available in

+/      option/syscall.c.

+/

+/  The _FS_TIMEOUT defines timeout period in unit of time tick.

+/  The _SYNC_t defines O/S dependent sync object type. e.g. HANDLE, ID, OS_EVENT*,

+/  SemaphoreHandle_t and etc.. A header file for O/S definitions needs to be

+/  included somewhere in the scope of ff.h. */

+

+/* #include <windows.h>	// O/S definitions  */

+

+

+/*--- End of configuration options ---*/

diff --git a/integer.h b/integer.h
new file mode 100644
index 0000000..074a46b
--- /dev/null
+++ b/integer.h
@@ -0,0 +1,33 @@
+/*-------------------------------------------*/

+/* Integer type definitions for FatFs module */

+/*-------------------------------------------*/

+

+#ifndef _FF_INTEGER

+#define _FF_INTEGER

+

+#ifdef _WIN32	/* FatFs development platform */

+

+#include <windows.h>

+#include <tchar.h>

+

+#else			/* Embedded platform */

+

+/* This type MUST be 8 bit */

+typedef unsigned char	BYTE;

+

+/* These types MUST be 16 bit */

+typedef short			SHORT;

+typedef unsigned short	WORD;

+typedef unsigned short	WCHAR;

+

+/* These types MUST be 16 bit or 32 bit */

+typedef int				INT;

+typedef unsigned int	UINT;

+

+/* These types MUST be 32 bit */

+typedef long			LONG;

+typedef unsigned long	DWORD;

+

+#endif

+

+#endif

diff --git a/logger.c b/logger.c
new file mode 100644
index 0000000..a574ea0
--- /dev/null
+++ b/logger.c
@@ -0,0 +1,116 @@
+#include "logger.h"
+
+void putch(unsigned char byteTx) {
+	uart_putch(byteTx);
+}
+
+void init(void)
+{
+	OSCCON = 0xf0;
+
+	ANSELA = 0x00;
+	ANSELB = 0x00;
+	ANSELC = 0x00;
+
+	LATA = 0x00;
+	TRISA = 0x00;
+
+	LATCbits.LATC6 = 1;
+	TRISCbits.TRISC6 = 0;
+	TRISCbits.TRISC7 = 1;
+
+	uart_init();
+	RC6PPS = 0x24;
+	RC7PPS = 0x25;
+
+	dac_init();
+}
+
+void put_rc (const char * s, FRESULT rc) {
+	const char *p;
+	FRESULT i;
+	static const char str[] = "OK\0DISK_ERR\0NOT_READY\0NO_FILE\0NOT_OPENED\0NOT_ENABLED\0NO_FILE_SYSTEM\0";
+
+	for (p = str, i = 0; i != rc && *p; i++) while(*p++);
+	printf("%s:\t%u\tFR_%s\r\n", s, rc, p);
+}
+
+static char buff[256];
+static FATFS fatfs;
+static DIR dir;
+static FIL file;
+static FILINFO fno;
+
+void main(void)
+{
+	uint8_t fcount;
+
+	uint16_t k;
+	init();
+	for (k = 0; k < 1000; k++);
+
+	printf("\r\nStarting up...\r\n");
+	
+	DSTATUS stat = disk_initialize(0);
+	printf("Initialised:\t%d\r\n", stat);
+
+	put_rc("Mounted", f_mount(&fatfs, "", 0));
+
+	put_rc("Opened dir", f_opendir(&dir, "/"));
+
+	fcount = 0;
+	for (;;) {
+		uint8_t res = f_readdir(&dir, &fno);
+		if (!fno.fname[0])
+			break;
+		if (fno.fattrib & AM_DIR)
+			printf("d\t%s\r\n", fno.fname);
+		else
+			printf("%7lu\t%s\r\n", fno.fsize, fno.fname);
+		fcount++;
+	}
+	printf("%u item(s)\r\n", fcount);
+
+	printf("\r\nOpening audio.wav...\r\n");
+
+	put_rc("Opened", f_open(&file, "audio.wav", FA_READ));
+	printf("Reading %u sectors...\r\n", fno.fsize);
+
+	FSIZE_t bytecount = fno.fsize;
+	while (bytecount) {
+		uint16_t cnt;
+		if (bytecount >= sizeof buff)
+			cnt = sizeof buff;
+		else
+			cnt = bytecount;
+		bytecount -= cnt;
+
+		uint8_t res = f_read(&file, buff, cnt, &k);
+		if (res != FR_OK) {
+			put_rc("Failed to read", res);
+			break;
+		}
+		if (k != cnt) {
+			printf("Bytecounts differ\r\n");
+			break;
+		}
+		putch('.');
+
+		for (k = 0; k < cnt; k++) {
+			dac_set(buff[k]);
+			delay_10us();
+		}
+	}
+	printf("\r\nAll done.\r\n");
+
+	k = 0;
+	while (1) {
+		//dac_set(0xff & (k++));
+		if (k & 0x0100)
+			k = 0;
+	}
+
+	while (1) {
+		LATAbits.LATA1 = ~LATAbits.LATA1;
+	}
+}
diff --git a/logger.h b/logger.h
new file mode 100644
index 0000000..6626ce4
--- /dev/null
+++ b/logger.h
@@ -0,0 +1,32 @@
+#ifndef _H_LOGGER
+#define _H_LOGGER
+
+#include <xc.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "util.h"
+
+#include "uart.h"
+
+#include "sd.h"
+#include "ff.h"
+#include "diskio.h"
+
+#include "dac.h"
+
+#define FCY 8000000
+
+#pragma config FOSC=INTOSC
+#pragma config WDTE=OFF
+#pragma config PWRTE=ON
+#pragma config MCLRE=ON
+#pragma config BOREN=OFF
+#pragma config CLKOUTEN=OFF
+#pragma config IESO=OFF
+#pragma config FCMEN=OFF
+#pragma config ZCD=OFF
+#pragma config PLLEN=ON
+#pragma config STVREN=ON
+
+#endif
diff --git a/sd.c b/sd.c
new file mode 100644
index 0000000..78eb137
--- /dev/null
+++ b/sd.c
@@ -0,0 +1,130 @@
+#include "sd.h"
+#include "spi.h"
+#include "util.h"
+
+static uint8_t sd_is_block_device = 0;
+
+uint8_t sd_send_command_util(uint8_t cmd, uint32_t data) {
+	uint8_t i;
+	uint8_t x = 0x01;
+	
+	if (cmd == SD_GO_IDLE_STATE)
+		x = 0x95; /* CRC */
+	else if (cmd == SD_SEND_IF_COND)
+		x = 0x87; /* CRC */
+
+	cmd |= 0x40;
+
+	SD_DESELECT();
+	spi_tx(0xff);
+	SD_SELECT();
+	spi_tx(0xff);
+
+	spi_tx(cmd);
+	spi_tx((uint8_t) (data >> 24));
+	spi_tx((uint8_t) (data >> 16));
+	spi_tx((uint8_t) (data >> 8));
+	spi_tx((uint8_t) (data));
+	spi_tx(x);
+
+	i = 10;
+	do {
+		x = spi_rx();
+	} while ((x & 0x80) && --i);
+
+	return x;
+}
+
+uint8_t sd_send_command(uint8_t cmd, uint32_t data) {
+	if (cmd & 0x80) {
+		uint8_t res = sd_send_command_util(SD_APP_CMD, 0);
+		if (res > 1)
+			return res;
+		cmd &= 0x7f;
+	}
+	return sd_send_command_util(cmd, data);
+}
+
+void sd_wait(void) {
+	uint8_t resp;
+	uint8_t i = 255;
+	do {
+		resp = sd_send_command(SD_SEND_OP_COND, 0);
+	} while (resp != 0 && --i);
+}
+
+char sd_init(void) {
+	uint8_t i;
+	uint16_t tmr;
+	
+	spi_init();
+
+	SD_CHIP_SELECT_TRIS = 0;
+
+	SD_SELECT();
+	for (i = 10; i; i--)
+		delay_100us();
+	SD_DESELECT();
+
+	for (i = 0; i < 20; i++)
+		spi_tx(0xff);
+
+	SD_SELECT();
+	tmr = 1000;
+	do {
+		for (i = 10; i; i--)
+			delay_100us();
+		i = sd_send_command(SD_GO_IDLE_STATE, 0);
+	} while (--tmr && i != 1);
+
+	if (sd_send_command(SD_SEND_IF_COND, 0x1aa) == 1) {
+		/* SD v2 */
+		uint8_t ocr[4];
+		ocr[0] = spi_rx();
+		ocr[1] = spi_rx();
+		ocr[2] = spi_rx();
+		ocr[3] = spi_rx();
+
+#ifdef DEBUG
+		printf("SD v2 %x:%x:%x:%x\r\n", ocr[0], ocr[1], ocr[2], ocr[3]);
+#endif
+
+		if (ocr[2] == 0x01 && ocr[3] == 0xaa) {
+			tmr = 10000;
+			do {
+				delay_100us();
+				i = sd_send_command(SD_OP_COND_SDC, 1UL << 30);
+			} while (--tmr && i);
+
+#ifdef DEBUG
+			printf("Done %u %u\r\n", tmr, i);
+#endif
+
+			i = sd_send_command(SD_READ_OCR, 0);
+
+			if (tmr && i == 0) {
+				ocr[0] = spi_rx();
+				ocr[1] = spi_rx();
+				ocr[2] = spi_rx();
+				ocr[3] = spi_rx();
+
+#ifdef DEBUG
+				printf("OCR: %x:%x:%x:%x\r\n", ocr[0], ocr[1], ocr[2], ocr[3]);
+#endif
+
+				if (ocr[0] & 0x40)
+					sd_is_block_device = 1;
+			}
+		}
+	} else {
+		/* SD v1 */
+#ifdef DEBUG
+		printf("SD v1\r\n");
+#endif
+	}
+
+	SD_DESELECT();
+	spi_rx();
+
+	return 0;
+}
diff --git a/sd.h b/sd.h
new file mode 100644
index 0000000..0a00add
--- /dev/null
+++ b/sd.h
@@ -0,0 +1,56 @@
+#include <stdint.h>
+
+#include "sd_config.h"
+
+#define SD_GO_IDLE_STATE 0
+#define SD_SEND_OP_COND 1
+#define SD_OP_COND_SDC 0xe9
+#define SD_SEND_IF_COND 8
+#define SD_SEND_CSD 9      
+#define SD_SEND_CID 10
+#define SD_STOP_TRANSMISSION 12
+#define SD_SEND_STATUS 13
+
+#define SD_SET_BLOCKLEN 16
+#define SD_READ_SINGLE_BLOCK 17
+#define SD_READ_MULTIPLE_BLOCK 18
+
+#define SD_WRITE_BLOCK 24
+#define SD_WRITE_MULTIPLE_BLOCK 25
+#define SD_PROGRAM_CSD 27
+
+#define SD_SET_WRITE_PROT 28
+#define SD_CLR_WRITE_PROT 29
+#define SD_SEND_WRITE_PROT 30
+
+#define SD_ERASE_WR_BLK_START 32
+#define SD_ERASE_WR_BLK_END 33
+#define SD_ERASE 38
+
+#define SD_APP_CMD 55 
+#define SD_GEN_CMD 56
+
+#define SD_READ_OCR 58
+#define SD_CRC_ON_OFF 59 
+
+#define SD_SD_STATUS 13
+#define SD_SEND_NUM_WR_BLOCKS 22
+#define SD_SET_WR_BLK_ERASE_COUNT 23
+#define SD_SD_APP_OP_COND 41
+#define SD_SET_CLR_CARD_DETECT 42
+#define SD_SEND_SCR 51
+
+#define SD_IN_IDLE_STATE 0x01
+#define SD_ERASE_RESET 0x02
+#define SD_ILLEGAL_COMMAND 0x04
+#define SD_CRC_ERROR 0x08
+#define SD_ERASE_ERROR 0x10
+#define SD_ADDRESS_ERROR 0x20
+#define SD_PARAM_ERROR 0x40
+
+#define SD_SELECT() (SD_CHIP_SELECT = 0)
+#define SD_DESELECT() (SD_CHIP_SELECT = 1)
+
+uint8_t sd_send_command(uint8_t cmd, uint32_t data);
+void sd_wait(void);
+char sd_init(void);
diff --git a/sd_config.h b/sd_config.h
new file mode 100644
index 0000000..6fcb9ca
--- /dev/null
+++ b/sd_config.h
@@ -0,0 +1,4 @@
+#include <xc.h>
+
+#define SD_CHIP_SELECT LATAbits.LATA0
+#define SD_CHIP_SELECT_TRIS TRISAbits.TRISA0
diff --git a/spi.c b/spi.c
new file mode 100644
index 0000000..f20f732
--- /dev/null
+++ b/spi.c
@@ -0,0 +1,61 @@
+#include <xc.h>
+#include "spi.h"
+
+void spi_init(void) {
+	SSPSTAT = 0x40;
+	SSPCON1 = 0x2a;
+	SSPADD = 39; // 200 kHz @ 32MHz
+
+	SPI_SDI = 0;
+	SPI_SCK = 0;
+	SPI_SDO = 0;
+
+	SPI_SDI_TRIS = 1;
+	SPI_SCK_TRIS = 0;
+	SPI_SDO_TRIS = 0;
+
+	SSPCLKPPS = SPI_SCK_PPS_IN;
+	SSPDATPPS = SPI_SDI_PPS;
+
+	SPI_SCK_PPS_OUT = 0x21;
+	SPI_SDO_PPS = 0x23;
+}
+
+uint8_t spi_exchange(uint8_t data) {
+	SSPCON1bits.WCOL = 0;
+	SSPBUF = data;
+	while (!SSPSTATbits.BF);
+	return SSPBUF;
+}
+
+uint8_t spi_exchange_buffer(uint8_t *in, uint8_t buflen, uint8_t *out) {
+	uint8_t written = 0;
+
+	if (buflen != 0) {
+		if (in != NULL) {
+			while (written < buflen) {
+				if (out == NULL)
+					spi_exchange(in[written]);
+				else
+					out[written] = spi_exchange(in[written]);
+				written++;
+			}
+		} else if (out != NULL)
+			while (written < buflen)
+				out[written++] = spi_exchange(DUMMY_DATA);
+	}
+
+	return written;
+}
+
+inline bool spi_is_buffer_full(void) {
+	return SSPSTATbits.BF;
+}
+
+inline bool spi_has_write_collision_occured(void) {
+	return SSPCON1bits.WCOL;
+}
+
+inline void spi_clear_write_collision_status(void) {
+	SSPCON1bits.WCOL = 0;
+}
diff --git a/spi.h b/spi.h
new file mode 100644
index 0000000..0402cfe
--- /dev/null
+++ b/spi.h
@@ -0,0 +1,42 @@
+#ifndef _H_SPI
+#define _H_SPI
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "spi_config.h"
+
+#define DUMMY_DATA 0xff
+
+#ifdef SPI_MSSP1
+	#define SSPSTAT SSP1STAT
+	#define SSPSTATbits SSP1STATbits
+	#define SSPCON1 SSP1CON1
+	#define SSPCON1bits SSP1CON1bits
+	#define SSPADD SSP1ADD
+	#define SSPBUF SSP1BUF
+#else
+#ifdef SPI_MSSP2
+	#define SSPSTAT SSP2STAT
+	#define SSPSTATbits SSP2STATbits
+	#define SSPCON1 SSP2CON1
+	#define SSPCON1bits SSP2CON1bits
+	#define SSPADD SSP2ADD
+	#define SSPBUF SSP2BUF
+#else
+	#error define either SPI_MSSP1 or SPI_MSSP2
+#endif
+#endif
+
+#define spi_tx(x) (spi_exchange(x))
+#define spi_rx() (spi_exchange(DUMMY_DATA))
+
+void spi_init(void);
+uint8_t spi_exchange(uint8_t data);
+uint8_t spi_exchange_buffer(uint8_t *in, uint8_t buflen, uint8_t *out);
+inline bool spi_is_buffer_full(void);
+inline bool spi_has_write_collision_occured(void);
+inline void spi_clear_write_collision_status(void);
+
+#endif
diff --git a/spi_config.h b/spi_config.h
new file mode 100644
index 0000000..4927a0e
--- /dev/null
+++ b/spi_config.h
@@ -0,0 +1,16 @@
+#include "logger.h"
+
+#define SPI_MSSP1
+
+#define SPI_SDI PORTBbits.RB2
+#define SPI_SDI_TRIS TRISBbits.TRISB2
+#define SPI_SDI_PPS 0x0a
+
+#define SPI_SCK LATBbits.LATB1
+#define SPI_SCK_TRIS TRISBbits.TRISB1
+#define SPI_SCK_PPS_IN 0x09
+#define SPI_SCK_PPS_OUT RB1PPS
+
+#define SPI_SDO_PPS RB0PPS
+#define SPI_SDO LATBbits.LATB0
+#define SPI_SDO_TRIS TRISBbits.TRISB0
diff --git a/uart.c b/uart.c
new file mode 100644
index 0000000..49aea48
--- /dev/null
+++ b/uart.c
@@ -0,0 +1,21 @@
+#include <xc.h>
+
+#include "uart.h"
+
+void uart_init(void) {
+	BAUDCON = 0x08;
+	SPBRGH = 0;
+#ifdef P18F27K40
+	SPBRGL = 138;
+#endif
+#ifdef P16F1778
+	SPBRGL = 68;
+#endif
+	TXSTA = 0x24;
+	RCSTA = 0x90;
+}
+
+void uart_putch(unsigned char data) {
+	while (!TXIF) continue;
+	TXREG = data;
+}
diff --git a/uart.h b/uart.h
new file mode 100644
index 0000000..d50ceb8
--- /dev/null
+++ b/uart.h
@@ -0,0 +1,39 @@
+#ifndef _H_UART
+#define _H_UART
+
+#include "uart_config.h"
+
+#ifdef UART_EUSART1
+	#define TXSTA TX1STA
+	#define RCSTA RC1STA
+	#define BAUDCON BAUD1CON
+	#define SPBRGH SP1BRGH
+	#define SPBRGL SP1BRGL
+	#define TXREG TX1REG
+# ifdef P16F1778
+	#define TXIF PIR1bits.TXIF
+# else
+	#define TXIF PIR3bits.TX1IF
+# endif
+#else
+#ifdef UART_EUSART2
+	#define TXSTA TX2STA
+	#define RCSTA RCRXTA
+	#define BAUDCON BAUD2CON
+	#define SPBRGH SP2BRGH
+	#define SPBRGL SP2BRGL
+	#define TXREG TX2REG
+# ifdef P16F1778
+	#define TXIF PIR1bits.TXIF
+# else
+	#define TXIF PIR3bits.TX2IF
+# endif
+#else
+	#error Define either UART_EUSART1 or UART_EUSART2
+#endif
+#endif
+
+void uart_init(void);
+void uart_putch(unsigned char data);
+
+#endif
diff --git a/uart_config.h b/uart_config.h
new file mode 100644
index 0000000..fbf76a1
--- /dev/null
+++ b/uart_config.h
@@ -0,0 +1,3 @@
+#include "logger.h"
+
+#define UART_EUSART1
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..4c994fc
--- /dev/null
+++ b/util.c
@@ -0,0 +1,16 @@
+#include "logger.h"
+
+void delay_100us(void) {
+	UINT n = FCY / 100000;
+	while (n--) {
+		LATA; LATA; LATA; LATA; LATA; LATA;
+		LATA; LATA; LATA; LATA; LATA; LATA;
+	}
+}
+
+void delay_10us(void) {
+	UINT n = FCY / 100000;
+	while (n--) {
+		LATA;
+	}
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..f04c424
--- /dev/null
+++ b/util.h
@@ -0,0 +1,7 @@
+#ifndef _H_UTIL
+#define _H_UTIL
+
+void delay_100us(void);
+void delay_10us(void);
+
+#endif