#include<reg52.h>//包含相應(yīng)的頭文件

#include<stdio.h>
#include<intrins.h>

sbit CS=P1^6;//定義數(shù)模轉(zhuǎn)換器硬件對(duì)應(yīng)引腳
sbit CLK=P1^3;
sbit DO=P1^4;
sbit DI=P1^5;

bit ADFlag;

unsigned char code DIS[]={0xf7,0xfb,0xfd};  //定義數(shù)碼管位碼
unsigned char code Datatab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//7段數(shù)碼管段碼表
data unsigned char  Display[3];//定義臨時(shí)存放數(shù)碼管數(shù)值

void Init_Timer1(void)
{
 TMOD |= 0x10;			     
 TH1=0xff;	              	/* Init value */
 TL1=0x00;
 //PT1=1;                   /* 優(yōu)先級(jí)    */
 EA=1;                      /* interupt enable */
 ET1=1;                     /* enable timer1 interrupt */
 TR1=1;  
}

unsigned char ReadADC(unsigned char channel)
{
 unsigned char i,j;
 unsigned char Temp=0;
  channel <<=3;                
  channel |=3;
     CS =0;                  //按照資料進(jìn)行時(shí)序操作
 for(i=0;i<3;i++)            //輸入指令，包含通道選擇
    {
     CLK=0;
	 _nop_();
     DI=channel;
     channel>>=1;
     _nop_();
     CLK=1;   
   }   
   CLK=0;
    _nop_();
   CLK=1;
for(j=0;j<8;j++)   //處理讀入8位數(shù)據(jù)
   {
    CLK=0;
	_nop_();
    Temp=(Temp<<1)|DO;
   _nop_();
    CLK=1;
    }
  CS=1;
return(Temp); //返回轉(zhuǎn)換值

}


void Timer1_isr(void) interrupt 3 using 1//定時(shí)器1執(zhí)行數(shù)碼管動(dòng)態(tài)掃描
{

 static unsigned char count,j;
 TH1=0xfb;		/* Init value */
 TL1=0x00;
 j++;
 if(j==200) {j=0;ADFlag=1;}
 P0=Display[count];
 P2=DIS[count];
 count++;
 if(count==3)
 count=0;

 
}

main()
{
 unsigned char ADtemp;//定義中間變量
// unsigned char temp;
 Init_Timer1();


		while(1)
		{
		 if(ADFlag)      //定時(shí)采集輸入模擬量
           {
   
   		ADFlag=0;
   		ADtemp=ReadADC(1);
		Display[0]=Datatab[((ADtemp-5)/50)]&0x7f;//處理電壓顯示
  		Display[1]=Datatab[((ADtemp-5)%50)/10];
  		Display[2]=Datatab[((ADtemp-5)%50)%10];
		   }
		}
}