porklib: Simple library for programming Arduino in C
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avr-lib/lib/spi.h

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492 B

#pragma once
#include <stdint.h>
#include "iopins.h"
#define PIN_MISO 12
#define PIN_MOSI 11
#define PIN_SCK 13
#define PIN_SS 10
/** Set SS to active state (LOW) */
#define spi_ss_enable() pin_low(PIN_SS)
/** Set SS to disabled state (HIGH) */
#define spi_ss_disable() pin_high(PIN_SS)
/** Init SPI (for SD card communication) */
void spi_init();
/**
* Write / read a byte to SPI.
*
* @param ch the written byte
* @return received byte
*/
uint8_t spi_write(const uint8_t b);