32 lines
645 B
C
32 lines
645 B
C
#include <avr/io.h>
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#include "spi.h"
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/*
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* Initialize SPI bus.
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*/
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void
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spi_init(void)
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{
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// CS PIN for WIZNET ETHERNET
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DDRB |= _BV(WIZNET_CS); // CS to OUT && Disable
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SPI_WIZNET_DISABLE();
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// CS PIN for SDCARD
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DDRB |= _BV(SD_CS); // CS to OUT && Disable
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SPI_SD_DISABLE();
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/* Initalize ports for communication with SPI units. */
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/* CSN=SS and must be output when master! */
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DDRB |= _BV(MOSI) | _BV(SCK) | _BV(CSN);
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PORTB |= _BV(MOSI) | _BV(SCK);
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/* Enables SPI, selects "master", clock rate FCK / 4 - 4Mhz, and SPI mode 0 */
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SPCR = _BV(SPE) | _BV(MSTR);
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SPSR = 0x0;
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//SPSR = _BV(SPI2X); //FCK / 2 - 8Mhz
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}
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