adc0808.c

使用51单片机作为控制器

#include <at89x52.h>

volatile unsigned char xdata adsel0 _at_ 0xA000;       /*AD选择*/
unsigned char ad_buf;

void ad_complete(void) interrupt 2 using 0
{
	ad_buf=adsel0;
}

void AD_Init1(void)
{
	EA=1;
    EX1=1;
    IT1=1;
}
unsigned int AD_Take(void) 
{
	adsel0=0;             //清零	
 	return ((unsigned int)(100*ad_buf)/51);
}