spi.h

AVR单片机系统开发经典实例部分源程序

#include "config.h"

//MOSI --- PB5
#define  	SPI_MOSI					(0x01 << 5)	
#define  	SPI_MOSI_OUT()				DDRB |= SPI_MOSI	
						
//MISO --- PB6
#define  	SPI_MISO					(0x01 << 6)							
#define  	SPI_MISO_IN()				DDRB &= ~SPI_MISO							

//SCK ---- PB7
#define  	SPI_SCK					    (0x01 << 7)								
#define  	SPI_SCK_OUT()				DDRB |= SPI_SCK			


void SPI_Init(void);
void SPI_Low(void);
void SPI_High(void);
uint8 SPI_SrByte(uint8 val);