#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