[嵌入式]基于51单片机的铂电阻PT100温度计proteus仿真

#include <REGX51.H>
#include <intrins.h>

#define Disdata P0
#define discan P2

sbit adrd=P3^7;          //IO口定义
sbit adwr=P3^6;
sbit csad=P3^4;
sbit  DIN=P0^7;       //LED小数点控制

unsigned char j,k,ad_data,t;
unsigned char dis[4]={0x00,0x00,0x00,0x00};

unsigned char code dis_7[12]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x40};
            
unsigned char code  scan_con[4]={0xfe,0xfd,0xfb,0xf7};      // 列扫描控制字    

void delay(unsigned int t)  
{  
  for(;t>0;t--)
  {
    ;
  }  
}  //11微秒延时函数

void scan()  
{  
   char k;      
   
   for(k=0;k<4;k++)        //四位LED扫描控制       
   {        
     Disdata=dis_7[dis[k]];        
	 if(k==1)
	 {
	   DIN=1;				  //加入小数点
	 }        
	 discan=scan_con[k];
	 delay(90);
	 discan=0xff;       
   }   
}
void ad0804()
{
  P1=0xff;              //读取P1口之前先给其写全1
  csad=0;               //选通ADCS
  adrd=0;               //AD读使能
  ad_data=P1;			//AD数据读取赋给P1口
  adrd=1;
  csad=1;               //关闭ADCS
  adwr=0;
}

void ad_compute()       //u=2.55+T/100, 2.55反映在AD上为0x83
{
  unsigned char t_temp;
    ad_data=ad_data-0x83;
    t_temp=ad_data*2-4;
	if(t_temp<=200)
	{
	 dis[3]=t_temp/100;
	 dis[2]=t_temp/10-dis[3]*10;
	 dis[1]=t_temp%10;
	 dis[0]=t%5*2;
	}
	else
	{
	  t_temp=256-t_temp;
      dis[3]=11;
      dis[2]=t_temp/10;
      dis[1]=t_temp%10;
      dis[0]=t%5*2;
	}
} 
void main()		//	主程序
{
  while(1)
  {
    ad0804();
	ad_compute();
	scan();
  }
}

链接：https://pan.baidu.com/s/1iFlHs2nka_32RpiBrqnF7Q
提取码：qdil