使用51单片机实现数字温度计仿真设计源程序资料

#include<reg51.h> #include <intrins.h> #define Disdata P3 #define discan P0 sbit adrd=P2^7; //IO口定义 sbit adwr=P2^6; sbit csad=P2^4; sbit DIN=P3^7; //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}; /* 共阳LED段码表对应 "0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "不亮" "-" */ 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; //if(ad_data>=0x83) //{ ad_data=ad_data-0x83; t_temp=ad_data*2-4; if(t_temp<=110) { 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(); } }