51单片机四路DS18B20温度检测系统代码与Proteus仿真图

ID:893862 · 发表于 2021-3-19 12:12

基于51单片机四路温度检测系统DS18B20的仿真和源程序
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"stc89c51.h"
#include"define.h"
sbit SetKey = P3^0;
sbit UpKey = P3^1;
sbit DnKey = P3^2;
sbit AlarmK = P3^3;
sbit BEEP = P2^4;
sbit LED1 = P2^0;
sbit LED2 = P2^1;
sbit LED3 = P2^2;
sbit LED4 = P2^3;
extern void StartDs18b20(uchar * ROMCODE);
extern void ReadDs18b20(uchar * ROMCODE);
extern uchar TZ; //转换后的温度值整数部分
extern uchar TD; //转换后的温度值整数部分
//extern void init_lcd (void);
//extern void LcdWrData(uchar content);
//extern void LcdWrCommand(uchar content) ;
extern uchar FindDevices(uchar CodeROM[][8]);
data uchar Ds18b20Rom[4][8];
//************************************************************************************************************************
extern uchar LastDiscrap ;
//extern void writeChar(uchar x,uchar y,uchar s); //LCD 写字符串
//extern void writestring(uchar x,uchar y,uchar *s) ;//LCD 写字符串
//extern void LCD_Initial(void);
//extern void write_dat(unsigned char dat);
//extern void command(unsigned int com);
extern unsigned char tflag;
unsigned char AlarmTempLow=1,AlarmTempTop=125,Set=0;
unsigned char fAlarm=0xff;
unsigned char TP1=0xff,TP2=0xff,TP3=0xff,TP4=0xff;
unsigned char Alarm1=0,Alarm2=0,Alarm3=0,Alarm4=0;
unsigned char tf1=0,tf2=0,tf3=0,tf4=0;
void delayms(uint ms) //延时xx毫秒
{
uchar i;
while(ms--)
{
for(i=0;i<120;i++);
}
}
sbit RS=P2^5;
sbit RW=P2^6;
sbit EN=P2^7;
#define LCD_BUS P0
void command(unsigned int com) //LCD写指令
{
RS=0; //RS为0
LCD_BUS=com; //装载指令
delayms(5); //延时5ms
EN=1; //LCD使能
delayms(5); //延时5ms
EN=0; //LCD不使能
}
void write_dat(unsigned char dat) //LCD写数据
{
RS=1; //RS为1
LCD_BUS=dat; //装载数据
delayms(5); //延时5ms
EN=1; //LCD使能
delayms(5); //延时5ms
EN=0; //LCD不使能
}
void writestring(unsigned char x,unsigned char y,unsigned char *s) //LCD 写字符串
{
if (y == 0) command(0x80 + x); //表示第一行
else command(0xC0 + x); //表示第二行
while (*s) //判断是否字符串的结尾
{
write_dat( *s); //显示当前字符
s ++; //字符串地址加1
}
}
void writeChar(unsigned char x,unsigned char y,unsigned char s) //LCD 写字符串
{
if (y == 0) command(0x80 + x); //表示第一行
else command(0xC0 + x); //表示第二行
{
write_dat( s); //显示当前字符
}
}
void LCD_Initial(void) //LCD初始化
{
EN=0; //LCD不使能
RW=0; //RW为0
command(0x38); //发送初始化指令
command(0x0c); //发送初始化指令
command(0x06); //发送初始化指令
command(0x01); //发送初始化指令
command(0x80+0x02); //发送LCD初始位置
}
void Alarm(void)
{
if(TP1!=0xff)
{
if((TP1>(AlarmTempTop))||(TP1<(AlarmTempLow))||(tf1==0x2d)) {Alarm1=1;LED1=0;}
else {Alarm1=0;LED1=1;}
}
else {Alarm1=0;LED1=1;}
if(TP2!=0xff)
{
if((TP2>(AlarmTempTop))||(TP2<(AlarmTempLow))||(tf2==0x2d)) {Alarm2=1;LED2=0;}
else {Alarm2=0;LED2=1;}
}
else {Alarm2=0;LED2=1;}
if(TP3!=0xff)
{
if((TP3>(AlarmTempTop))||(TP3<(AlarmTempLow))||(tf3==0x2d)) {Alarm3=1;LED3=0;}
else {Alarm3=0;LED3=1;}
}
else {Alarm3=0;LED3=1;}
if(TP4!=0xff)
{
if((TP4>(AlarmTempTop))||(TP4<(AlarmTempLow))||(tf4==0x2d)) {Alarm4=1;LED4=0;}
else {Alarm4=0;LED4=1;}
}
else {Alarm4=0;LED4=1;}
if(fAlarm!=0)
{
if((Alarm1==1)||(Alarm2==1)||(Alarm3==1)||(Alarm4==1)) {BEEP=0;}
else BEEP=1;
}
else BEEP=1;
}
void DispAlData(void)
{
unsigned char i1=0,i2=0,i3=0,i4=0,i5=0,i6=0;
i1 = AlarmTempLow/100; //获得温度值的百位
i2 = AlarmTempLow%100/10; //获得温度值的十位
i3 = AlarmTempLow%10; //获得温度值的个位
i4 = AlarmTempTop/100; //获得温度值的百位
i5 = AlarmTempTop%100/10; //获得温度值的十位
i6 = AlarmTempTop%10; //获得温度值的个位
writestring(5,1," ");
writestring(13,1," ");
if(i1!=0) writeChar(5,1,i1+'0');
if((i1==0)&&(i2!=0)) writeChar(5,1,i2+'0');
if(i1!=0) writeChar(6,1,i2+'0');
if((i1==0)&&(i2==0)) writeChar(5,1,i3+'0');
else if((i1==0)&&(i2!=0)) writeChar(6,1,i3+'0');
if((i1!=0)) writeChar(7,1,i3+'0');
if(i4!=0) writeChar(13,1,i4+'0');
if((i4==0)&&(i5!=0)) writeChar(13,1,i5+'0');
if(i4!=0) writeChar(14,1,i5+'0');
if((i4==0)&&(i5==0)) writeChar(13,1,i6+'0');
else if((i4==0)&&(i5!=0)) writeChar(14,1,i6+'0');
if((i4!=0)) writeChar(15,1,i6+'0');
}
void SetFun(void)
{
if(SetKey==0)
{
delayms(20);
if(SetKey==0)
{
if(Set<2) {Set++;writestring(0,1," Low= Top= ");}
else {Set=0;}
}
DispAlData();
switch(Set)
{
case 0: writestring(0,1,"C D ");break;
case 1: writestring(0,1,">");writestring(8,1," ");break;
case 2: writestring(0,1," ");writestring(8,1,">");break;
}
while(SetKey==0);
}
if((UpKey==0)&&(Set!=0))
{
delayms(20);
if(UpKey==0)
{
switch(Set)
{
case 1: if(AlarmTempLow<125) AlarmTempLow++;else AlarmTempLow=125; break;
case 2: if(AlarmTempTop<125) AlarmTempTop++;else AlarmTempTop=125; break;
}
DispAlData();
while(UpKey==0);
}
}
if((DnKey==0)&&(Set!=0))
{
delayms(20);
if(DnKey==0)
{
switch(Set)
{
case 1: if(AlarmTempLow>-20) AlarmTempLow--;else AlarmTempLow=-20; break;
case 2: if(AlarmTempTop>0) AlarmTempTop--;else AlarmTempTop=0; break;
}
DispAlData();
while(DnKey==0);
}
}
if(AlarmK==0)
{
delayms(20);
if(AlarmK==0)
{
fAlarm=~fAlarm;
while(AlarmK==0) ;
}
}
}
void main(void)
{
uint k;
uchar number;
BEEP=1;
LCD_Initial();
//init_lcd();
writestring(0,0," Search Sensor ");
delayms(800);
number=FindDevices(Ds18b20Rom);
writestring(0,0,"Search sensors");
writeChar(7,0,number/10+'0');
writeChar(8,0,number%10+'0');
for(k=0;k<number;k++)
{
StartDs18b20(& Ds18b20Rom[k][0]);
}
delayms(800);
writestring(0,0,"A B ");
writestring(0,1,"C D ");
while(1)
{
if(Set==0)
{
for(k=0;k<number;k++)
{
StartDs18b20(& Ds18b20Rom[k][0]);
ReadDs18b20(& Ds18b20Rom[k][0]);
switch(k)
{
case 0:
TP1=TZ;tf1=tflag;
writeChar(1,0,tflag);
writeChar(2,0,TZ/100+'0');
writeChar(3,0,TZ/10%10+'0');
writeChar(4,0,TZ%10+'0');
writeChar(5,0,'.');
writeChar(6,0,TD+'0');
break;
case 1:
TP2=TZ;tf2=tflag;
writeChar(10,0,tflag);
writeChar(11,0,TZ/100+'0');
writeChar(12,0,TZ/10%10+'0');
writeChar(13,0,TZ%10+'0');
writeChar(14,0,'.');
writeChar(15,0,TD+'0');
break;
case 2:
TP3=TZ;tf3=tflag;
writeChar(1,1,tflag);
writeChar(2,1,TZ/100+'0');
writeChar(3,1,TZ/10%10+'0');
writeChar(4,1,TZ%10+'0');
writeChar(5,1,'.');
writeChar(6,1,TD+'0');
break;
case 3:
TP4=TZ;tf4=tflag;
writeChar(10,1,tflag);
writeChar(11,1,TZ/100+'0');
writeChar(12,1,TZ/10%10+'0');
writeChar(13,1,TZ%10+'0');
writeChar(14,1,'.');
writeChar(15,1,TD+'0');
break;
}
}
}
SetFun();
Alarm();
}
}