adc0808.c

这是一个温度控制器的小程序

#include<reg52.h>

#define uchar unsigned char 
#define uint unsigned int 

uchar code discode[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
uchar code disbitcode[]={0x01,0x02,0x04};

uchar disbuf[3]={0,0,0};

uchar getdata=0;
uchar count=0;
float airtemp;
sbit ST=P3^2;
sbit EOC=P3^1;
sbit OE=P3^0;
void delay_1ms();
void delay_nms(uchar n);
void display(float datatemp);
void main()
 {

  while(1)
    {
	  ST=0;
	  ST=1;
	  ST=0;
    while(EOC==0);
	  OE=1;
	  getdata=P1;
	   OE=0;
	   airtemp=getdata;

	   display(airtemp);
	   }
 
 }
 void display(float datatemp)
 {
  uchar i;
  uint temp;
  temp=datatemp;
  disbuf[0]=temp/100;
  disbuf[1]=temp%100/10;
  disbuf[2]=temp%10;
  for(i=0;i<3;i++)
   {  
      P2=disbitcode[i];
	  if(i==1)
	    P0=discode[disbuf[i]]+0x80;
	  else 
	    P0=discode[disbuf[i]];
	  delay_nms(2);
	 }
   }

void delay_1ms(void)
{
 uchar i;
 for(i=0;i<150;i++)
 {
 }
}
void delay_nms(uchar n)
{
 uchar i;
 for(i=0;i<n;i++)
 delay_1ms();
}

void display(float datatemp)
 {

  uint temp;
  temp=datatemp*10;
  disbuf[0]=temp/100;
  disbuf[1]=temp%100/10;
  disbuf[2]=temp%10;
 	   P2_0=1;
	   P2_1=0;
	   P2_2=0;
	   P0=discode[disbuf[0]];
	  // delay_nms(2);

	   P2_0=0;
	   P2_1=1;
	   P2_2=0;
	   P0=discode[disbuf[1]];
	  //delay_nms(2);
	  
	   P2_0=0;
	   P2_1=0;
	   P2_2=1;
	   P0=discode[disbuf[2]];
	  //delay_nms(2); 
	 
   }