?? spi.c
字號:
#include "public.h"
#include <string.h>
//SPI initialize
// clock rate: 5529498hz
void spi_init(void)
{
SPCR = 0x50; //disable the spi interrupt
//enable spi
//MSB first
//spi master
//mode 0
//spi clock rate:fosc/4
SPSR = 0x01; //
}
void SPISend(unsigned char ucByte)
{
SPDR = ucByte;
while (!(SPSR & 0x80));
ucByte = SPDR;
}
unsigned char SPIReadData(void)
{
SPDR = 0x00;
while (!(SPSR & 0x80));
return SPDR;
}
void SPI_CSTiming(void)
{
SETBIT(SPI_OUT,SPI_CS);
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
CLEARBIT(SPI_OUT,SPI_CS);
}
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