untitled.c~

来自「AVR单片机控制实现播放CD音频数据」· C~ 代码 · 共 25 行

void WriREG(unsigned char LSB, unsigned char MSB, unsigned char REG){ 
	CDCOM = REG; //设要写的REG
    ATA_C_MS_OUT ;
    ATA_C_LS_OUT ;
	A0=CDCOM&0x01;
	A1=(CDCOM>>1)&0x01;
	A2=(CDCOM>>2)&0x01;
	CS0=(CDCOM>>3)&0x01;
	CS1=(CDCOM>>4)&0x01;
	WR=(CDCOM>>5)&0x01;
	RD=(CDCOM>>6)&0x01;
	RST=(CDCOM>>7)&0x01;
	CS0 = 0;
	WR  = 0;
 	ATA_DATA_MS_OUT ;
    ATA_DATA_LS_OUT ;
	DBL = LSB;
	DBM = MSB; //写数据
	WR = 1;
	CS0 = 1; 
	DBL = 0xFF;
	DBM = 0xFF;
	delay_ms(3); //延时
 	ATA_DATA_MS_IN  ;
    ATA_DATA_LS_IN  ;