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