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spi.h

#ifndef _DEV_SPI_H_
#define _DEV_SPI_H_

#include <sys/device.h>
/*
 * Unique device number
 */
#define SPI             10

#define BUFOR_SIZE      300     

/*
 * Uniqu SPI device number
 */
#define SPI_FLASH_1 1

/*
 * Uniqu SPI device number
 */
#define SPI_FLASH_2 2

/*
 * Uniqu SPI device number
 */
#define SPI_RTC 3

/*
 * SPI control line
 */
#define     SPI_SCK            PORT1                      

/*
 * SPI control line
 */
#define     SPI_MOSI           PORT2

/*
 * SPI control line
 */
#define     SPI_MISO           PORT3

/*
 * SPI control line
 */
#define     SPI_PORT           PORTB

/*
 * SPI control line
 */
#define     SPI_PORT_DIR       DDRB

typedef struct _SPIICB SPIICB;
typedef struct _SPIDCB SPIDCB;

struct _SPIICB {
    u_char*     read_buf;          

    u_char      write_buf[BUFOR_SIZE];

    u_int       size;   

    u_int       index;

    u_char      writeFlag;

    volatile    u_char ready;      
    volatile    u_char finishRead;
};

struct _SPIDCB {
    HANDLE rdy;

    HANDLE readRdy;

    volatile u_char deviceId;
    
    HANDLE deviceRdy;
};


extern NUTDEVICE devSpi0;

extern int SpiInit(NUTDEVICE *dev);


extern int SpiInput(NUTDEVICE *dev, u_char* buf, u_int size);

extern int SpiOutput(NUTDEVICE *dev, u_char* buf, u_int size);

extern void LockSpi(NUTDEVICE* dev, u_char deviceId);


extern void UnlockSpi(NUTDEVICE* dev, u_char deviceId);

#endif

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