spi.c

Atmega168+HMC1052+OLED开发指南针

#include "common.h"

//****************************************** 
// SPI MODEL
//******************************************
void SPI_MasterInit(void)
{
	DDR_SPI |= (1<<DD_MOSI)|(1<<DD_SCK);	// Set MOSI and SCK output, all others input
	//SPCR = (1<<SPSR);
	SPCR = (1<<SPE)|(1<<MSTR); 	// Enable SPI, Master, set clock rate fck/16
}

void SPI_MasterTransmit(uchar cData)
{
	SPDR = cData;							// Start transmission
	while(!(SPSR & (1<<SPIF)));				// Wait for transmission complete
}