spi_tlc5615.c

ATmega16-ad1602

#define SPI_TLC5615_C
#include "includes.h"
void spi_init(void)//SPI初始化
{
	SPCR=0X50; //使能SPI，MSB先发，主模式,CPOL为0，默认4分频
	
}
void spi_io_init(void)
{
	DDRB|=(1<<PB4)|(1<<PB5)|(1<<PB7); //PB4-SS,PB5-MOSI,PB7-SCK
	PORTB|=(1<<PB4)|(1<<PB5)|(1<<PB7);//PB4拉高TLC5615不使能;MOSI,SCK为高电平
}
void spi_tlc5615(unsigned int idata)//0000 00(78 8765 4321)
{
	unsigned int temp;
	unsigned char temp1=0,temp2=0,status;
	temp=idata<<2;//0000 7887 6543 2100
	temp1=(temp&0xff00)>>8;//0000 0000 (0000 7887) 
	temp2=(idata&0x00ff);//0000 0000 （6543 2100）
	
	PORTB&=~(1<<PB4);//使能TLC5615
	SPDR=temp1;//传送数据高二位
	do	
	{
	  status=SPSR;
	}while(!(status&=0X80));
	
	delay_nms(10);
	
	SPSR=0;
	SPDR=temp2;//传送数据低八位
	do
	{
	  status=SPSR;
	}while(!(status&=0X80));
	SPSR=0;
	delay_nms(10);
	PORTB|=(1<<PB4);//TLC5615不使能
}