Subversion Repositories Code-Repo

#ifndef SPI_H

#define	SPI_H

#define MAXSPIBUF 64

#define SPI2_WRITE_ONLY

// Option to use interrupt. If interrupt are used, SPI write does not block but

//  there is a longer delay between reading/writing data

//#define SPI2_USE_INTERRUPT

// SPI speed selection

#define SPI2_FOSC_TMR2      0b0011

#define SPI2_FOSC_64        0b0010

#define SPI2_FOSC_16        0b0001

#define SPI2_FOSC_8         0b1010

#define SPI2_FOSC_4         0b0000

typedef struct {

#ifndef SPI2_WRITE_ONLY

    char buffer_in[MAXSPIBUF];

    char buffer_in_read_ind;

    char buffer_in_write_ind;

    char buffer_in_len;

#endif

    char buffer_out[MAXSPIBUF];

    char buffer_out_ind;

    char buffer_out_len;

} SPI_DATA;

void SPI2_Init(SPI_DATA *data, char speed);

void SPI2_Write(char *msg, unsigned int length);

void SPI2_Write_Repeat(char c, unsigned int length);

#ifndef SPI2_WRITE_ONLY

void SPI2_Recv_Interrupt_Handler(void);

void SPI2_Read(char length);

char SPI2_Buffer_Len(void);

char SPI2_Read_Buffer(char *buffer);

#endif

void SPI2_DMA_Init(void);

void SPI2_DMA_Start(unsigned int length, void *TXADDR, void *RXADDR);

#endif	/* SPI_H */