xyFC/include/spi.h

/*
 * Bit-Banged SPI routines
 */

#ifndef _SPI_H
#define _SPI_H

#include <stdint.h>
#include <avr/io.h>

#define SCK_on PORTB |= PB4
#define SCK_off PORTB &= ~(PB4)

#define MO_on PORTB |= PB3
#define MO_off PORTB &= ~(PB3)

#define CS_on PORTB |= PB1
#define CS_off PORTB &= ~(PB1)

#define MI_1 (PINB & PB2) == PB2
#define MI_0 (PINB & PB2) != PB2

#define GDO_1 (PINB & PB0) == PB0
#define GDO_0 (PINB & PB0) != PB0

#define NOP() __asm__ __volatile__("nop")

void spiInit(void);
void spiWrite(uint8_t command);
uint8_t spiRead(void);

#endif