ad.c

stc12c5a60s2内置AD转换使用的C程序

/************************************/
/*12c5a60s2有内置的ad，使用时，请添加上<STC_NEW_8051.H>的.h文件才可以使用*/
/*转换的结果显示在1602的液晶上*/
#include<STC_NEW_8051.H>
#include<intrins.h>  //包含_nop_()函数定义的头文件
#include<math.h>
#define uchar unsigned char
#define uint unsigned int
#define AD_SPEED 0x60  
sbit lcden=P3^4;
sbit lcdrs=P3^5;
sbit rw=P3^6;
uchar num,shi,ge,bai,qian1,qian2,zuoj,youj,hou;
uchar code table[]="000"; 
void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}
void write_com(uchar com)
{
	lcdrs=0;
	P0=com;
	delay(5);
	lcden=1;
	delay(5);
	lcden=0;
}		
void write_data(uchar date)
{
	lcdrs=1;
	P0=date;
	delay(5);
	lcden=1;
	delay(5);
	lcden=0;
}
void display(uchar a,uchar add)
{
	ge=a%10;
	shi=a%100/10;
	bai=a/100;
	write_com(0x80+add);
	write_data(0x30+bai);
	write_data(0x30+shi);
	write_data(0x30+ge);
}

void init()
{	
	rw=0;
	lcden=0;
	write_com(0x38);
	write_com(0x0c);
	write_com(0x06); 
	write_com(0x01); 
	write_com(0x80);
   	 for(num=0;num<3;num++)
	 {
	 write_data(table[num]);
	 delay(2);
	 }
/*	TMOD=1;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;	 */

}
//ad转换
uint moni(uint channel)
{
		uchar AD_finished=0;
		P1ASF=channel;
		AUXR1&=~0x04;
	 	ADC_CONTR|=0x80;      //开A/D转换电源,第一次使用时要打开内部模拟电源
		ADC_RES=0;
		ADC_RESL=0;
		channel&=0x07;
						//选择P1.x作为A/D转换通道
		ADC_CONTR=AD_SPEED;       	    
		_nop_();
		ADC_CONTR|=channel;
		_nop_();
	 	ADC_CONTR|=0x80;
		delay(60);       
		ADC_CONTR|=0x08;
		AD_finished=0;
		while(AD_finished==0)      	//等待A/D转换结束
		{
		    AD_finished=(ADC_CONTR&0x10);
		}
		ADC_CONTR&=0xE7;     	//将ADC_FLAG清0
		    	//保存A/D转换结果
	   return(ADC_RES);
}

void main()
{
	 init();


	 while(1)
	 {
	 qian1=moni(0x00); //P0^0
	 display(qian1,0);
	 qian2=moni(0x01);//P0^1
	 display(qian2,0x04);
	 zuoj=moni(0x02);//P0^2
	 display(zuoj,0x40);
	 youj=moni(0x03);//P0^3
	 display(youj,0x44);
	 hou=moni(0x04);//P0^4
	 display(hou,0x48);				 

	 }
}