analog.c

ADUC的周立功7290可以显示的程序

 #include<aduc845.h> 
 #include<absacc.h>
  
void AnalogInit(void)
{
    ADCMODE = 0x22;		//单次测量	
	SF = 0x0D;			//频率，105.3Hz
    ADC0CON1 = 0xA7;	//不缓冲，最大输入范围	
    ADC0CON2 = 0x40;	//外参考，通道0	

	DACCON = 0x03;//12bit dac0  
}

unsigned int ADC(unsigned char ch)
{      	
	ADC0CON2 = 0x40|ch;
	ADCMODE = 0x22;
	RDY0=0;
	while(!RDY0);
	return(ADC0H*256+ADC0M);	//不能用ADC0H<<8+ADC0M	
}				  

void DAC(unsigned int dat)
{
	DACH=dat >> 8;
	DACL=dat;
}

void ADDR_OUT(unsigned int addr)
{
	addr = (addr - 1) + (addr - 1) / 60 * 4;
	XBYTE[0x8000 + addr] = 0;
}