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標題: 51單片機ds18b20 lcd1602測溫 [打印本頁]

作者: 美琴的備胎 時間: 2021-3-15 19:59
標題: 51單片機ds18b20 lcd1602測溫
#include "reg52.h"
#include "1602.h"
#include "delay.h"
#include "18b20.h"

sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit host=P2^3;
sbit buzz=P2^7;

unsigned char page;
unsigned char fresh;

unsigned char tempsetflag;
unsigned char updownflag;
unsigned char ss;

unsigned char set=20;
unsigned char up=50;
unsigned char down=10;

unsigned char temp;

void Init_Timer0(void)
{
   TMOD |= 0x01;    //使用模式1，16位定時器，使用"|"符號可以在使用多個定時器時不受影響
   EA=1;          //總中斷打開
   ET0=1;          //定時器中斷打開
   TR0=1;          //定時器開關打開
}

void main()
{
LCD_Init();
Init_DS18B20();
ReadTemperature();
DelayMs(500);
ReadTemperature();
DelayMs(500);
ReadTemperature();
DelayMs(500);
Init_Timer0();

while(1)
{

if(fresh)
{
   fresh=0;
   temp=ReadTemperature();

      if(temp<set)host=0;
      else host=1;

      if(temp>=up)buzz=0;
      else if(temp<down)buzz=0;
      else buzz=1;

   if(page==0)
   {
         LCD_Write_String(0,0,"TEMPTURE:");
         LCD_Write_Tmp(9,0,temp);
         LCD_Write_Data(0xdf);
         LCD_Write_Data(0x43);

         LCD_Write_String(0,1,"SET:");
         LCD_Write_Tmp(5,1,set);
         LCD_Write_Data(0xdf);
         LCD_Write_Data(0x43);


         if(tempsetflag)
         {
            if(ss)LCD_Write_String(5,1,"  ");
            ss=!ss;
         }
   }
   else if(page==1)
   {
         LCD_Write_String(0,0,"UP:");
         LCD_Write_Tmp(6,0,up);
         LCD_Write_Data(0xdf);
         LCD_Write_Data(0x43);

         LCD_Write_String(0,1,"DOWN:");
         LCD_Write_Tmp(6,1,down);
         LCD_Write_Data(0xdf);
         LCD_Write_Data(0x43);
         if(ss)LCD_Write_String(6,0,"  ");
         ss=!ss;
   }
   else if(page==2)
   {
         LCD_Write_String(0,0,"UP:");
         LCD_Write_Tmp(6,0,up);
         LCD_Write_Data(0xdf);
         LCD_Write_Data(0x43);

         LCD_Write_String(0,1,"DOWN:");
         LCD_Write_Tmp(6,1,down);
         LCD_Write_Data(0xdf);
         LCD_Write_Data(0x43);
         if(ss)LCD_Write_String(6,1,"  ");
         ss=!ss;
   }
}

}
}

void Timer0_isr(void) interrupt 1
{
static unsigned int num;
static unsigned char key1num;//按鍵一按下標志
static unsigned char key2num;//按鍵二按下標志
static unsigned char key3num;//按鍵三按下標志
static unsigned char key4num;//按鍵四按下標志

TH0=(65536-2000)/256;       //重新賦值 2ms
TL0=(65536-2000)%256;

num++;
if(num==250)       //大致100ms
{
      num=0;
      fresh=1;
}

if(key1==0)key1num=1;//設定設定溫度
else if(key1num==1)
{
   key1num=0;
   if(page==0)tempsetflag=!tempsetflag;//只有在界面一才可以調節
}

if(key2==0)key2num=1;//上下限設定
else if(key2num==1)
{
   key2num=0;
   if(!tempsetflag)//只有非設置設置溫度的時候才可以
   {
      page++;
      LCD_Init();
      if(page==3)page=0;
   }
}

if(key3==0)key3num=1;//溫度加
else if(key3num==1)
{
   key3num=0;
   if((page==0)&&(tempsetflag))if(set<up)set++;//只有在設置設置溫度時才可以調節
   if(page==1)if(up<99)up++;
   if(page==2)if(down<up)down++;
}

if(key4==0)key4num=1;//溫度減
else if(key4num==1)
{
   key4num=0;
   if((page==0)&&(set>down))set--;
   if(page==1)if(up>down)up--;
   if(page==2)if(down>0)down--;
}
}

無標題.png (61.27 KB, 下載次數: 45)

18B20溫度測試.zip

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