spi_bitbang.h

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00001 
00047 #ifndef DRV_SPI_BITBANG_H
00048 #define DRV_SPI_BITBANG_H
00049 
00050 #include "cfg/cfg_spi_bitbang.h"
00051 
00052 #include <cfg/compiler.h>
00053 
00059 #define SPI_LSB_FIRST 1
00060 #define SPI_MSB_FIRST 2
00061 
00062 #if CONFIG_SPI_DATAORDER == SPI_LSB_FIRST
00063     #define  SPI_DATAORDER_START    1
00064     #define  SPI_DATAORDER_SHIFT(i) ((i) <<= 1)
00065 #elif CONFIG_SPI_DATAORDER == SPI_MSB_FIRST
00066     #define  SPI_DATAORDER_START    0x80
00067     #define  SPI_DATAORDER_SHIFT(i) ((i) >>= 1)
00068 #endif
00069 
00070 void spi_write(const void *buf, size_t len);
00071 void spi_read(void *buf, size_t len);
00072 uint8_t spi_sendRecv(uint8_t c);
00073 void spi_init(void);
00074 void spi_assertSS(void);
00075 void spi_deassertSS(void);
00076 
00077 #endif /* DRV_SPI_BITBANG_H */