ad.c

PIC18系列单片机

#include <pic.h>
#define	uchar	unsigned	char
#define	uint	unsigned	int
unsigned int AD_READ(void)//
{
	unsigned int x;
	TRISA0=1;//RA0为输入口
	ADON=1;
	CHS0=0;CHS1=0;CHS2=0;//选通道０
	ADCS1=1;ADCS0=0;//采样频率为fsoc/4/32
	ADCON1=0x8e;
	ADGO=1;
	while(ADGO);
	x=ADRESH*256+ADRESL;
	return(x);
}

void main(void)
{
	uint m;
   while(1)
   {
	m=AD_READ();
   }   
}