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【51单片机】【protues仿真】基于51单片机冰箱系统

news 2025/8/27 2:49:17

一、主要功能

二、使用步骤

三、硬件资源

四、软件设计

五、实验现象

一、主要功能

1、LCD1602液晶显示冷藏冷冻温度值
2、按键设置温度阈值
3、冷藏或冷冻温度高于阈值启动制冷片
4、限位器开关检测门状态，开门过长蜂鸣器警报
5、状态指示灯，串口通信

二、使用步骤

基于51单片机的冰箱控制系统设计通常包含温度监测、照明灯控制、冰箱门检测、数据通信、制冷控制及报警功能等核心模块。

三、硬件资源

1、51单片机核心模块
2、按键模块
3、温度传感器、限位传感器模块
4、蜂鸣器模块，指示灯模块
5、继电器模块
6、LCD1602显示模块

四、软件设计

#include <reg52.h>           //调用单片机头文件
#include <intrins.h>
#include "lcd1602.h"
#include "DS18B20_One.h"
#include "DS18B20_Two.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define uchar unsigned char //无符号字符型宏定义   变量范围0~255
#define uint unsigned int   //无符号整型宏定义   变量范围0~65535

//按键引脚定义
sbit key1 = P1^0;
sbit key2 = P1^1;
sbit key3 = P1^2;

sbit led1 = P1^5; //冷藏指示灯
sbit led2 = P1^6; //制冷指示灯
sbit led3 = P1^7; //照明指示灯

sbit beep = P2^0; //蜂鸣器
sbit door = P2^1; //门检测开关

sbit relay1 = P3^6; //继电器1
sbit relay2 = P3^7; //继电器2

unsigned char setn=0; //记录设置按键按下次数
unsigned char time=60; //冰箱门未关时间计时
short temperature1 = 0; //冷藏温度
short temperature2 = 0; //制冷温度
short set_temp1 = 15; //冷藏温度设置值
short set_temp2 = 10; //制冷温度设置值

bit tixingFlag = 0; //提醒标志
bit shuaxin = 0; //刷新标志
unsigned char Fasong1[] = "T1: 00°C";
unsigned char Fasong2[] = "T2: 00°C";
void time_init(void)   //定时器初始化
{
   TMOD |= 0X01;   //定时器0工作方式1
TL0 = 0x00;
   TH0 = 0x4C; //定时器定时50ms
    TR0 = 1;
   ET0 = 1;       //开定时器0中断
   EA = 1;      //开总中断
}

void displaySetValue(short temp1,short temp2) //显示设置的值
{
       short value1 = temp1;
   short value2 = temp2;

   if(temp1 < 0)
       {
               value1 = -value1;
           lcd_write_char(11,0,'-');
       }
   else
       {
               lcd_write_char(11,0,' ');
       }
   lcd_write_char(12,0,value1/10+'0');
       lcd_write_char(13,0,value1%10+'0');

       if(temp2 < 0)
       {
               value2 = -value2;
           lcd_write_char(11,1,'-');
       }
   else
       {
               lcd_write_char(11,1,' ');
       }
   lcd_write_char(12,1,value2/10+'0');
       lcd_write_char(13,1,value2%10+'0');
}

void main()
{
       uart_init();
       lcd_init();//1602初始化
       lcd_write_str(0, 0, "T1: 00 C S: 00 C");
       lcd_write_str(0, 1, "T2: 00 C S: 00 C");
   lcd_write_char(6,0,0xDF);
   lcd_write_char(6,1,0xDF);
   lcd_write_char(14,0,0xDF);
   lcd_write_char(14,1,0xDF);
   displaySetValue(set_temp1,set_temp2);
   do{
           temperature1 = DS18B20_TF();
           delay_ms(100);
       }while(temperature1==85);
       do{
           temperature2 = DS18B20_TF2();
           delay_ms(100);
       }while(temperature2==85);
   time_init();//定时器初始化
       while(1)
       {
           keyscan(); //按键扫描
           if(setn == 0 && shuaxin)
               {
                   shuaxin = 0;
                   temperature1 = DS18B20_TF(); //读取温度
                   if(temperature1<0)
                       {
                               temperature1 = -temperature1;
                           lcd_write_char(3,0,'-');
                       }
                       else
                       {
                               lcd_write_char(3,0,' ');
                       }
                       lcd_write_char(4,0,temperature1/10+'0'); //显示温度
                       lcd_write_char(5,0,temperature1%10+'0');

temperature2 = DS18B20_TF2(); //读取温度
                   if(temperature2<0)
                       {
                               temperature2 = -temperature2;
                           lcd_write_char(3,1,'-');
                       }
                       else
                       {
                               lcd_write_char(3,1,' ');
                       }
                       lcd_write_char(4,1,temperature2/10+'0'); //显示温度
                       lcd_write_char(5,1,temperature2%10+'0');
               }
               if(temperature1>set_temp1)led1=0;else led1=1; //冷藏指示灯亮
               if(temperature2>set_temp2)led2=0;else led2=1; //制冷指示灯亮
               if(temperature1>set_temp1 || temperature2>set_temp2) //当温度超过设定温度，则开启制冷
               {
                       relay1 = relay2 = 0;
               }
               else
               {
                       relay1 = relay2 = 1;
               }
               if(door == 0) //冰箱门打开
               {
                       led3 = 0; //照明指示灯亮
               }
               else //冰箱门关闭
               {
                   led3 = 1; //照明指示关闭
                       tixingFlag = 0;
                   beep = 1; //蜂鸣器关闭
                       time = 60; //时间重新赋值
               }
       }
}