51单片机温度控制程序+仿真(按键设置上中下限)

ID:264959 · 发表于 2018-12-16 15:09

1.可按键设置上中下限
2.有声光报警
3.有风扇

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 <reg51.h>
#include <intrins.h>
#include <math.h>
#include "main.h"
char code LED_display[14] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xBF,0XFF,0x89,0XC7}; //共阳数码管段码
// 0 1 2 3 4 5 6 7 8 9 - H L
char code bit_sel[4] = {0x01,0x02,0x04,0x08};
char dis[4];
unsigned char TL0_temp; /*暂存TL0的初值*/
unsigned char TH0_temp; /*暂存TH0的初值*/
#define INT_CLOCK 5 /*INT_CLOCK为定时值，单位为ms ,此处定义为5ms*/
#define CRY_FREQUENCY 12000000 /*CRY_FREQUENCY为晶振频率，单位为Hz*/
bit flag = 0; //0-正温度 1-负温度
sbit key1 = P3^2; //设置按键
sbit key2 = P3^3; //增量按键
sbit key3 = P3^4; //减量按键
bit bKey1,bKey2,bKey3;
uchar countSet = 0;
sbit ledRed = P1^0; //红灯
sbit ledYellow = P1^1; //黄灯
sbit ledGreen = P1^2; //绿灯
sbit fan = P1^6; //风扇
sbit beep = P1^5; //蜂鸣器
char shutDowmH = 85; //关机温度
char SetH = 65; //高温上限
char SetL = 30; //低温下限
char alarm = 0;
sbit DQ=P3^6; /* 18B20数据引脚*/
#define temp_h P3|=0x40//单片机向DS18B20输出高电平
#define temp_l P3&=0xbf//单片机向DS18B20输出低电平
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void Timer0_init()
{
unsigned long T0_temp; /*暂存T0的初始值 */
T0_temp = 65536-((INT_CLOCK *CRY_FREQUENCY /1000)/12); /*T0初始值计算公式，参考教科书*/
TL0_temp = T0_temp & 0xff;
TH0_temp = T0_temp >> 8;
TL0 = TL0_temp;
TH0 = TH0_temp;
TMOD |= 0x01;
TR0 = 1;
ET0 = 1;
EA = 1; /*开定时器0中断*/
}
void INT0_Init()
{
EX0 = 1;
IT0 = 1;
}
void delay1ms(unsigned int ms)//延时1毫秒（不够精确的）
{
unsigned int i,j;
for(i=0;i<ms;i++)
for(j=0;j<100;j++);
}
void keyScan()
{
if(!key2)
{
delay1ms(300);
if(!key2)
bKey2 = 1;
}
if(!key3)
{
delay1ms(300);
if(!key3)
bKey3 = 1;
}
}
//数码管显示温度值
void displayTemp(uint temp)
{
uchar i;
if(countSet == 0) //显示实际的测试温度
{
if(flag == 1) //负温度
{
dis[0] = 11;
dis[1] = 10;
dis[2] = temp/100;
dis[3] = temp%100/10;
}
else //正温度
{
dis[0] = 11;
dis[1] = temp/1000;
dis[2] = temp%1000/100;
dis[3] = temp%1000%100/10;
}
}
else if(countSet == 1) //显示设置的温度下限
{
dis[0] = 1; //显示'1'
dis[1] = 10;
dis[2] = SetL/10;
dis[3] = SetL%10;
}
else if(countSet == 2) //显示设置的温度上限
{
dis[0] = 2; //显示'2'
dis[1] = 10;
dis[2] = SetH/10;
dis[3] = SetH%10;
}
else if(countSet == 3) //显示设置的关机温度
{
dis[0] = 3; //显示'3'
dis[1] = 10;
dis[2] = shutDowmH/10;
dis[3] = shutDowmH%10;
}
}
/***********ds18b20延迟子函数（晶振12MHz ）*******/
void delayms(uint x)//延时1ms
{
uint y,z;
for(y=x;y>0;y--)
for(z=110;z>0;z--);
}
/**********ds18b20初始化函数**********************/
void Ds18b20_reset()//DS18B20初始化
{
uchar count;
uint i=2200;
temp_l;
for(count=240;count>0;count--);//延时480us
temp_h;
while(DQ&&(i>0)) i--;
for(count=240;count>0;count--);//延时480us
}
/***********ds18b20读一个字节**************/
uchar Ds18b20_read()//从DS18B20读一个字节
{
uchar i,count,dat;
for(i=8;i>0;i--)
{
dat>>=1;
temp_l;
for(count=1;count>0;count--);
temp_h;//此语句必须有，参考datasheet的P15
for(count=1;count>0;count--);
if(DQ)
dat|=0x80;
for(count=30;count>0;count--);
}
return dat;
}
/*************ds18b20写一个字节****************/
void Ds18b20_write(uchar dat)//向DS18B20写一个字节
{
uchar count;
uchar i;
for(i=8;i>0;i--)
{
temp_l;
for(count=1;count>0;count--);
if(dat&0x01==0x01)
temp_h;
else
temp_l;
for(count=30;count>0;count--);
temp_h;
dat>>=1;
}
}
/**************读取ds18b20当前温度************/
uint ReadTemperature(void)
{
uint dat;
uchar dat1,dat2;//保存读出的温度
Ds18b20_reset();
Ds18b20_write(0xcc);
Ds18b20_write(0x44);//发送温度转换命令
delayms(1000);//延时1s，等待温度转换完成
Ds18b20_reset();
Ds18b20_write(0xcc);
Ds18b20_write(0xbe);//发送读温度寄存器命令
dat1=Ds18b20_read();
dat2=Ds18b20_read();
if(dat2 >= 240) //负温度
{
dat=(~(dat2*256+dat1)+1)*(0.0625*10);
flag = 1;
}
else //正温度
{
flag = 0;
dat=(dat2*256+dat1)*(0.0625*10);
}
return dat;
}
void main()
{
uint temp;
Timer0_init(); //定时器0初始化
INT0_Init();
EA = 1; //开总中断
fan = 0;
countSet = 0;
while(1)
{
if(countSet == 0)
temp = ReadTemperature(); //采集DS18B20的温度值
if(flag == 1) //负温度
{
ledYellow = 0; //黄灯亮
ledRed = 1;
ledGreen = 1;
displayTemp(temp); //显示温度
fan = 0;//风扇关闭
alarm = 0;
}
else
{
if(temp/10 > shutDowmH)
{
dis[0] = 11;
dis[1] = 11;
dis[2] = 11;
dis[3] = 11; //数码管熄灭
ledYellow = 1; //灯全熄灭
ledRed = 1;
ledGreen = 1;
fan = 0; //风扇停转
alarm = 0;
}
else if(temp/10 > SetH)
{
displayTemp(temp); //显示温度
ledYellow = 1; //指示灯变红
ledRed = 0;
ledGreen = 1;
fan = 1; //风扇开启
alarm = 1;
}
else if(temp/10 > SetL)
{
displayTemp(temp); //显示温度或者设置
ledYellow = 1; //指示灯变绿
ledRed = 1;
ledGreen = 0;
fan = 1; //风扇开启
alarm = 0;
}
else
{
displayTemp(temp); //显示温度
ledYellow = 0; //指示灯变黄
ledRed = 1;
ledGreen = 1;
fan = 0; //风扇关闭
alarm = 0;
}
}
keyScan();
if(bKey2) //温度加
{
bKey2 = 0;
if(countSet == 1) //设置低温
{
if(SetL < SetH)
SetL++;
}
if(countSet == 2) //设置高温
{
if(SetH < shutDowmH)
SetH++;
}
if(countSet == 3) //设置关机温度
{
if(shutDowmH < 99)
shutDowmH++;
}
}
if(bKey3) //温度减
{
bKey3 = 0;
if(countSet == 1) //设置低温
{
if(SetL > 0)
SetL--;
}
if(countSet == 2) //设置高温
{
if(SetH > SetL)
SetH--;
}
if(countSet == 3) //设置关机温度
{
if(shutDowmH > SetH)
shutDowmH--;
}
}
}
}
unsigned char count_5ms = 0;
unsigned int count_5s = 0;
void T0_interrupt(void) interrupt 1
{
TH0 += TH0_temp;
TL0 += TL0_temp;
count_5ms++;
if(count_5ms >= 4)
count_5ms = 0;
P2 = 0X00;
P0 = LED_display[dis[count_5ms]];
P2 = bit_sel[count_5ms];
if(alarm == 1)
{
if(count_5s < 1000)
{
count_5s++;
beep = !beep;
}
}
else
count_5s = 0;
}
/*
外部中断0服务处理函数，记录“设置”按键按下的次数
*/
void int_int0() interrupt 0
{
countSet++;
if(countSet > 3)
countSet = 0;
}

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CPU温度控制(1).zip (103.31 KB, 下载次数: 307)

ID:668055 · 发表于 2020-5-30 18:11

你好请问void Ds18b20_reset()//DS18B20初始化
{
      uchar count;
      uint i=2200;
      temp_l;
      for(count=240;count>0;count--);//延时480us
      temp_h;
      while(DQ&&(i>0)) i--;
      for(count=240;count>0;count--);//延时480us
temp_h和temp_l是代表了拉高总线和拉低总线吗？为何延时不用上边刚定义的函数，要用count呢？

ID:437339 · 发表于 2018-12-26 15:27

你好。我是新手，dis[1]=11,为什么数码管熄灭啊

ID:239620 · 发表于 2019-2-23 10:26

谢谢分享，学习学习！

ID:468833 · 发表于 2019-4-12 10:20

谢谢分享

ID:524279 · 发表于 2019-4-29 10:51

楼主发全程序啊

ID:409381 · 发表于 2019-4-29 12:28

谢谢分享楼主大作

ID:208733 · 发表于 2020-2-2 18:47

谢谢分享

ID:404346 · 发表于 2020-3-29 10:38

谢谢分享

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51单片机温度控制程序+仿真(按键设置上中下限)

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