spi.h File Reference

#include <inttypes.h>

Go to the source code of this file.

Macros
#define	SHIFT_SCLR   21
#define	SHIFT_RCK   22
#define	SHIFT_G   26

Functions
uint8_t	spi_readwrite (uint8_t data)
	Writes the data on the SPI bus and returns the reply. More...
void	spi_init (void)
	Initializes the SPI bus. More...
void	shift_init (void)
	Initializes the shift register. More...
void	shift_data (uint8_t data)
	Sends a byte to the shift register. More...

Macro Definition Documentation

#define SHIFT_G   26

#define SHIFT_RCK   22

#define SHIFT_SCLR   21

Function Documentation

void shift_data

(

uint8_t

data

)

Sends a byte to the shift register.

Parameters

data

Data byte

void shift_init

(

void

)

Initializes the shift register.

void spi_init

(

void

)

Initializes the SPI bus.

uint8_t spi_readwrite

(

uint8_t

data

)

Writes the data on the SPI bus and returns the reply.

Parameters

data	byte to write to the bus

Returns

byte read from the bus