单片机可调温控报警器

ID:235055 · 发表于 2020-8-14 18:51

#include <reg51.h>
#include <1602.h>
#include <DS18b20.h>
#include <intrins.h>
sbit speak=P1^5;
sbit keyadj=P3^3;//调整按键
sbit keyup=P3^4;  //加
sbit keydown=P3^5;//减
uchar DisplayData[6];//定义数组存放温度值

int num,temp;
uchar almhigh=40,almlow=15; //报警的上下限初始值
void almspeak()    //报警响0.5秒
{
uint i=500;
while(i--)
{
     speak=~speak;
Delay1ms(1);
}
}
void Display()
{
   uchar i;
   num=Ds18b20ReadTemp();    //读取温度传感器的数据
   temp=num*0.0625*100+0.5; //转换为十进制数值
   DisplayData[0] = temp / 10000;    //以下为数值的拆分
   DisplayData[1] = temp % 10000 / 1000;
   DisplayData[2] = temp % 1000 / 100 ;
   DisplayData[3] ='.';
   DisplayData[4] = temp % 100 / 10;
   DisplayData[5] = temp % 10;
   LCD1602_write_com(0x80);
   LCD1602_write_word("tempreture is:");
   LCD1602_write_com(0xc4);
   for(i=0;i<6;i++)
{
   if(i==3)LCD1602_write_data(DisplayData[i]);
   else LCD1602_write_data(DisplayData[i]+48);
}
   if((temp/100+0.5)>=almhigh||(temp/100+0.5)<=almlow)almspeak(); //温度超出上下限就报警
}
void Display_adj()
{
LCD1602_write_com(0x01); //清屏指令
LCD1602_write_com(0x80); //重新定位
LCD1602_write_word("adjust almtemp");
}
void disp2() //调整上下限温度的画面
{
LCD1602_write_com(0xc0);
LCD1602_write_word("high");
LCD1602_write_data(almhigh/10+48);
LCD1602_write_data(almhigh%10+48);
LCD1602_write_word(",low");
LCD1602_write_data(almlow/10+48);
LCD1602_write_data(almlow%10+48);
}
void disp3() //调整上限温度的画面
{
LCD1602_write_com(0xc0);
LCD1602_write_word("* almhigh=");
LCD1602_write_data(almhigh/10+48);
LCD1602_write_data(almhigh%10+48);
LCD1602_write_word(" *");
}
void disp4() //调整下限温度的画面
{
LCD1602_write_com(0xc0);
LCD1602_write_word("* almlow=");
LCD1602_write_data(almlow/10+48);
LCD1602_write_data(almlow%10+48);
LCD1602_write_word(" * ");
}
void keyscan()    //按键检测
{
if(keyadj==0)    //第一次检测到按键按下，进入调整界面
{
   Delay1ms(500);
   Display_adj();
   while(keyadj==1); //按键没有按第二次就等待
   if(keyadj==0)//第二次按下调整按键，进行上限调整
   {
   Delay1ms(500);
   disp2();
   while(keyadj==1)
      {
   disp3();
   if(keyup==0){Delay1ms(500);almhigh++; disp3();}
   if(keydown==0){Delay1ms(500);almhigh--;disp3();}
      }
   }
   if(keyadj==0)//第三次按下调整按键，进行下限调整
   {
   Delay1ms(500);
   while(keyadj==1)
   {
     disp4();
if(keyup==0){Delay1ms(500);almlow++;disp4();}
     if(keydown==0){Delay1ms(500);almlow--;disp4();}
   }
   }
if(keyadj==0)//第四次按下调整按键，退出调整
{
     Delay1ms(500);
while(keyadj==0);

LCD1602_write_com(0x01);//退出之前进行清屏
}

}
}
void main()
{
Init_LCD1602();
Ds18b20Init();
while(1)
{
   Display();
   keyscan();
}
}

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