sam7s-spi.h

00001 #ifndef __CORE_SPI_H__KBMMOKI6CG__
00002 #define __CORE_SPI_H__KBMMOKI6CG__
00003 #include <stdint.h>
00004 
00005 void
00006 spi_init();
00007 
00008 #define SPI_POLARITY_INACTIVE_HIGH 1
00009 #define SPI_POLARITY_INACTIVE_LOW 1
00010 
00011 #define SPI_PHASE_CHANGE_CAPTURE 0
00012 #define SPI_PHASE_CAPTURE_CHANGE 1
00013 
00014 struct spi_block {
00015   const uint8_t *send;  /* NULL for receive only */
00016   uint8_t *receive;     /* NULL for send only */
00017   uint16_t len;         /* transfer length, non-zero */
00018 };
00019 
00020 void
00021 spi_transfer(unsigned int chip, const struct spi_block *block, unsigned int blocks);
00022 
00023 void
00024 spi_init_chip_select(unsigned int chip, unsigned int speed,
00025                      unsigned int dlybct,
00026                      unsigned int dlybs, unsigned int phase,
00027                      unsigned int polarity);
00028 
00029 #endif /* __CORE_SPI_H__KBMMOKI6CG__ */