diff options
| author | Camil Staps | 2016-08-22 22:28:32 +0200 |
|---|---|---|
| committer | Camil Staps | 2016-08-22 22:28:32 +0200 |
| commit | 79bb1a9932af7bfcdab67e2a1da9d9edcba87f71 (patch) | |
| tree | c9f96cd9498d1e24bc646923c5d79d13f310fbeb /firmware/src/system_config/pic32mx695f512h/system_exceptions.c | |
| parent | Initial commit (diff) | |
old wipold
Diffstat (limited to 'firmware/src/system_config/pic32mx695f512h/system_exceptions.c')
| -rw-r--r-- | firmware/src/system_config/pic32mx695f512h/system_exceptions.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/firmware/src/system_config/pic32mx695f512h/system_exceptions.c b/firmware/src/system_config/pic32mx695f512h/system_exceptions.c new file mode 100644 index 0000000..73a2380 --- /dev/null +++ b/firmware/src/system_config/pic32mx695f512h/system_exceptions.c @@ -0,0 +1,143 @@ +/*******************************************************************************
+ MPLAB Harmony Exceptions Source File
+
+ File Name:
+ system_exceptions.c
+
+ Summary:
+ This file contains a function which overrides the deafult _weak_ exception
+ handler provided by the XC32 compiler.
+
+ Description:
+ This file redefines the default _weak_ exception handler with a more debug
+ friendly one. If an unexpected exception occurs the code will stop in a
+ while(1) loop. The debugger can be halted and two variables _excep_code and
+ _except_addr can be examined to determine the cause and address where the
+ exception occured.
+ *******************************************************************************/
+
+// DOM-IGNORE-BEGIN
+/*******************************************************************************
+Copyright (c) 2013-2015 released Microchip Technology Inc. All rights reserved.
+
+Microchip licenses to you the right to use, modify, copy and distribute
+Software only when embedded on a Microchip microcontroller or digital signal
+controller that is integrated into your product or third party product
+(pursuant to the sublicense terms in the accompanying license agreement).
+
+You should refer to the license agreement accompanying this Software for
+additional information regarding your rights and obligations.
+
+SOFTWARE AND DOCUMENTATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND,
+EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
+MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE.
+IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER
+CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR
+OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
+INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE OR
+CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT OF
+SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
+(INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
+ *******************************************************************************/
+// DOM-IGNORE-END
+
+
+#include <xc.h> /* Defines special funciton registers, CP0 regs */
+#include "system_config.h"
+#include "system_definitions.h"
+#include "system/debug/sys_debug.h"
+
+
+// *****************************************************************************
+// *****************************************************************************
+// Section: Global Data Definitions
+// *****************************************************************************
+// *****************************************************************************
+
+/*******************************************************************************
+ Exception Reason Data
+
+ <editor-fold defaultstate="expanded" desc="Exception Reason Data">
+
+ Remarks:
+ These global static items are used instead of local variables in the
+ _general_exception_handler function because the stack may not be available
+ if an exception has occured.
+*/
+
+/* Code identifying the cause of the exception (CP0 Cause register). */
+static unsigned int _excep_code;
+
+/* Address of instruction that caused the exception. */
+static unsigned int _excep_addr;
+
+/* Pointer to the string describing the cause of the exception. */
+static char *_cause_str;
+
+/* Array identifying the cause (indexed by _exception_code). */
+static char *cause[] =
+{
+ "Interrupt",
+ "Undefined",
+ "Undefined",
+ "Undefined",
+ "Load/fetch address error",
+ "Store address error",
+ "Instruction bus error",
+ "Data bus error",
+ "Syscall",
+ "Breakpoint",
+ "Reserved instruction",
+ "Coprocessor unusable",
+ "Arithmetic overflow",
+ "Trap",
+ "Reserved",
+ "Reserved",
+ "Reserved",
+ "Reserved",
+ "Reserved"
+};
+
+// </editor-fold>
+
+
+// *****************************************************************************
+// *****************************************************************************
+// Section: Exception Handling
+// *****************************************************************************
+// *****************************************************************************
+
+/*******************************************************************************
+ Function:
+ void _general_exception_handler ( void )
+
+ Summary:
+ Overrides the XC32 _weak_ _generic_exception_handler.
+
+ Description:
+ This function overrides the XC32 default _weak_ _generic_exception_handler.
+
+ Remarks:
+ Refer to the XC32 User's Guide for additional information.
+ */
+
+void _general_exception_handler ( void )
+{
+ /* Mask off Mask of the ExcCode Field from the Cause Register
+ Refer to the MIPs Software User's manual */
+ _excep_code = (_CP0_GET_CAUSE() & 0x0000007C) >> 2;
+ _excep_addr = _CP0_GET_EPC();
+ _cause_str = cause[_excep_code];
+
+ SYS_DEBUG_PRINT(SYS_ERROR_ERROR, "\nGeneral Exception %s (cause=%d, addr=%x).\n",
+ _cause_str, _excep_code, _excep_addr);
+
+ while (1)
+ {
+ SYS_DEBUG_BreakPoint();
+ }
+}
+
+/*******************************************************************************
+ End of File
+*/
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