基于C51的数字温度计设计（带protues仿真）

ID:212515 · 发表于 2017-6-19 12:17

C51的数字温度计仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）

单片机源程序如下:

#include<reg52.h>
#include"1602.h"
#include"ds18b20.h"
#define uint unsigned int
#define uchar unsigned char
sbit speaker=P2^4;
sbit red=P2^5;
sbit green=P2^6;
sbit key1=P3^0;
sbit key2=P3^1;
uint tem;
int htem,ltem;
uchar mode;
uchar code t3[]={" high temp: . C"};
uchar code t4[]={" low temp: . C "};
void display(uint dat,uchar add)
{
uchar bai,shi ,ge;
bai=dat/100;
shi=dat%100/10;
ge=dat%10;
writelcd_cmd(add);
writelcd_dat(bai+0x30);
writelcd_dat(shi+0x30);
writelcd_cmd(add+3);
writelcd_dat(ge+0x30);
}
void keyscan()
{ uchar i,j;
writelcd_cmd(0x80);
for(i=0;i<16;i++)
{writelcd_dat(t3[i]);}
writelcd_cmd(0xc0);
for(j=0;j<16;j++)
{writelcd_dat(t4[j]);}
while(mode!=0)
{
display(htem,0x8b);
display(ltem,0xca);
while(mode!=0)
{
switch(mode)
{
case 1:writelcd_cmd(0xc0+13);writelcd_cmd(0x0f);break;
case 2:writelcd_cmd(0xc0+11);writelcd_cmd(0x0f);break;
case 3:writelcd_cmd(0xc0+10);writelcd_cmd(0x0f);break;
case 4:writelcd_cmd(0x80+14);writelcd_cmd(0x0f);break;
case 5:writelcd_cmd(0x80+12);writelcd_cmd(0x0f);break;
case 6:writelcd_cmd(0x80+11);writelcd_cmd(0x0f);break;
default:mode=0;break;
}
if(key1==0)
{
delay(10);
if(key1==0)
{
while(key1==0);
switch(mode)
{
case 1:ltem=ltem+1;if(ltem>999)ltem=999;if(ltem>=htem)ltem=htem-1;display(ltem,0xca);writelcd_cmd(0xc0+13);break;
case 2:ltem=ltem+10;if(ltem>999)ltem=999;if(ltem>=htem)ltem=htem-1;display(ltem,0xca);writelcd_cmd(0xc0+11);break;
case 3:ltem=ltem+100;if(ltem>999)ltem=999;if(ltem>=htem)ltem=htem-1;display(ltem,0xca);writelcd_cmd(0xc0+10);break;
case 4:htem=htem+1;if(htem>999)htem=999;if(htem<=ltem)htem=ltem+1;display(htem,0x8b);writelcd_cmd(0xc0+14);break;
case 5:htem=htem+10;if(htem>999)htem=999;if(htem<=ltem)htem=ltem+1;display(htem,0x8b);writelcd_cmd(0xc0+12);break;
case 6:htem=htem+100;if(htem>999)htem=999;if(htem<=ltem)htem=ltem+1;display(htem,0x8b);writelcd_cmd(0xc0+11);break;
default:break;
}
}
}
if(key2==0)
{
delay(10);
if(key2==0)
{
while(key2==0);
switch(mode)
{
case 1:ltem=ltem-1;if(ltem<0)ltem=0;if(ltem>=htem)ltem=htem-1;display(ltem,0xca);writelcd_cmd(0xc0+13);break;
case 2:ltem=ltem-10;if(ltem<0)ltem=0;if(ltem>=htem)ltem=htem-1;display(ltem,0xca);writelcd_cmd(0xc0+11);break;
case 3:ltem=ltem-100;if(ltem<0)ltem=0;if(ltem>=htem)ltem=htem-1;display(ltem,0xca);writelcd_cmd(0xc0+10);break;
case 4:htem=htem-1;if(ltem<0)htem=0;if(htem<=ltem)htem=ltem+1;display(htem,0x8b);writelcd_cmd(0xc0+14);break;
case 5:htem=htem-10;if(ltem<0)htem=0;if(htem<=ltem)htem=ltem+1;display(htem,0x8b);writelcd_cmd(0xc0+12);break;
case 6:htem=htem-100;if(ltem<0)htem=0;if(htem<=ltem)htem=ltem+1;display(htem,0x8b);writelcd_cmd(0xc0+11);break;
default:break;
}
}
}
}
}
lcd_init();
}
void init()
{
lcd_init();
speaker=1;
red=0;
green=0;
mode=0;
htem=360;
ltem=270;
EA=1;
EX0=1;
ET0=1;
TMOD=0X01;
IT0=1;
TH0=0XFD;
TL0=0X81;
}
void main()
{
init();
while(1)
{
if(mode!=0)
{keyscan();}
else if(mode==0)
{
delay(100);
tmpchange();
tem=tmp();
if(tem<=ltem){red=0;green=1;TR0=1;}
else if(tem>=htem){green=0;red=1;TR0=1;}
else
{
TR0=0;
red=0;
green=0;
}
delay(10);
display(tem,0xca);
delay(100);
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…………限于本文篇幅余下代码请从51黑下载附件…………