Proteus仿真实验之 51单片机温度测量实验

#include <reg51.h> #define u8 unsigned char //定义数码管 sbit S1 = P2^4; sbit S2 = P2^5; sbit S3 = P2^6; sbit S4 = P2^7; sbit OP=P2^0;//读写引脚的使能位 sbit EOC=P3^3;//AD转换完成信号 sbit W=P3^6;//单片机写引脚 sbit R=P3^7;//单片机读引脚 unsigned char DATE[10]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6}; //延时函数 void delay_ms(unsigned char m) { unsigned char i; unsigned char j; unsigned char k; for(i=0;i<m;i++) { for(j=0;j<10;j++) { for(k=0;k<110;k++) ; } } } //数码管动态显示 void WeiXuan(unsigned char i) { if(i==1) { S1=1; S2=0; S3=0; S4=0; } if(i==2) { S1=0; S2=1; S3=0; S4=0; } if(i==3) { S1=0; S2=0; S3=1; S4=0; } if(i==4) { S1=0; S2=0; S3=0; S4=1; } } void XianShi(int da) { unsigned char a; unsigned char b; unsigned char c; unsigned char d; a = da % 10; P1=DATE[a]; WeiXuan(4); delay_ms(3); S1=0; S2=0; S3=0; S4=0; da = da / 10; b = da % 10; P1=DATE[b]; WeiXuan(3); delay_ms(3); S1=0; S2=0; S3=0; S4=0; da = da / 10; c = da % 10; P1=DATE[c]; WeiXuan(2); delay_ms(3); S1=0; S2=0; S3=0; S4=0; d = da / 10; P1=DATE[d]; WeiXuan(1); delay_ms(3); S1=0; S2=0; S3=0; S4=0; } // 读取指定A/D转换通道的值 u8 ReadAD(u8 m) { u8 value; W=0; //单片机写信好拉低 P0=m;//发送AD通道地址 W=1;//关闭写信好 R=0;//读信号拉低 value=P0;//读取0808数据 R=1;//读信号拉高 return value;//返回读到的AD值 } void main() { u8 value; int t; OP=0;//使能读写可控制信号线开关 while(1) { value=ReadAD(0);//读取 通道0 的AD值 t=1.305*value*value*value/100000.0-0.004*value*value+5.391*value-3.942;//拟合曲线 XianShi(t); } }