spi.c File Reference

#include <avr/io.h>
#include <util/delay.h>
#include "spi.h"
#include "utils.h"

Go to the source code of this file.

Functions
int	spi_init ()
	Initialize SPI in master mode.
int	spi_ready ()
	Check if the SPI subsystem is initialized.
int	spi_set_slave_select (enum spi_slave *slave, unsigned char state)
	Set the slave-select line for the given device.
int	spi_send_n (enum spi_slave *slave, unsigned char *data, int length)
	Send a sequence of bytes to a slave without reading response.
int	spi_send (enum spi_slave *slave, unsigned char data)
	Send a single byte to a slave.
int	spi_recieve (enum spi_slave *slave, unsigned char *out)
	Receive one byte from a slave.
int	spi_recieve_n (enum spi_slave *slave, unsigned char *out, int length)
	Receive several bytes from a slave.
int	spi_duplex (enum spi_slave *slave, unsigned char *data, unsigned char *out, int length)
	Full-duplex SPI transfer.
int	spi_push (enum spi_slave *slave, unsigned char data, unsigned char *out)
	Push one byte to a slave and optionally read the response.

Variables
static unsigned char	_ready = 0

Variable Documentation

_ready

unsigned char _ready = 0

static

Definition at line 7 of file spi.c.

Referenced by spi_init(), and spi_ready().