*

 *

 *

 */

#ifndef SPI_H_

#define SPI_H_

#include <avr/io.h>

#define SPI_SCK_PIN PORTB7

#define SPI_MOSI_PIN PORTB5

#define SPI_MISO_PIN PORTB6

// SPI clock modes

#define SPI_MODE_0 0x00 /* Sample (Rising) Setup (Falling) CPOL=0, CPHA=0 */

#define SPI_MODE_1 0x01 /* Setup (Rising) Sample (Falling) CPOL=0, CPHA=1 */

#define SPI_MODE_2 0x02 /* Sample (Falling) Setup (Rising) CPOL=1, CPHA=0 */

#define SPI_MODE_3 0x03 /* Setup (Falling) Sample (Rising) CPOL=1, CPHA=1 */

// data direction