小白跟做江科大51单片机之DS18B02按键控制效果

1.新建项目导入AT24C02、Key、Delay、LCD1602、DS18B02相关文件

2.编写main.c函数

#include <REGX52.H>
#include "LCD1602.h"
#include "Delay.h"
#include "Key.h"
#include "AT24C02.h"
#include "DS18B02.h"

float T=0,Tshow=0;
unsigned char t_low=0,t_high=0;

void main()
{
   unsigned char keynum;
   LCD_Init();
   while(1)
   {
       //读取阈值部分
       t_high = AT24C02_ReadByte(0);
   t_low = AT24C02_ReadByte(1);
       if(t_high>125 || t_low<-55 || t_high <= t_low)
       {//如果阈值非法，则设为默认值
           t_high=20;
           t_low=15;
       }

       t_Trans();
       T=t_Read();
       Tshow=T;
       if(Tshow<0)
       {
           LCD_ShowChar(1,1,'-');
           Tshow=-Tshow;
       }
       else
       {
           LCD_ShowChar(1,1,'+');
       }
       LCD_ShowNum(1,2,Tshow,3);
       LCD_ShowChar(1,5,'.');
       LCD_ShowNum(1,6,(unsigned long)(Tshow*10000)%10000,3);

       //阈值调整
       keynum=Key();
       if(keynum==1)
       {
           if(t_high<125)
           t_high++;
       }
       if(keynum==2)
       {
           if(t_high-1==t_low||t_high-1==-56)t_high++;
           else t_high--;
       }
       if(keynum==3)
       {
           if(t_low<t_high)
           t_low++;
       }
       if(keynum==4)
       {
           if(t_low>-55&&t_low<t_high)
           t_low--;
       }


       //显示超过阈值部分
       if(Tshow<t_low)
       {
           LCD_ShowString(1,10,"lower");
       }
       else if(Tshow>t_high)
       {
           LCD_ShowString(1,10,"higher");
       }
       else
       {
           LCD_ShowString(1,10," ");
       }

       LCD_ShowNum(2,1,t_high,4);
       LCD_ShowNum(2,7,t_low,4);
       AT24C02_WriteByte(0,t_high);
       Delay(5);
       AT24C02_WriteByte(1,t_low);
       Delay(5);
   }

}