單片機stc89c52 1602液晶顯示倒計時分秒按鍵可以設置

ID:388477 · 發表于 2020-3-13 16:06

   做這個倒計時，主要家里的電磁爐經常燒熱水，最近一次就燒干鍋了，就壞掉了，拆開之后線盤燒斷了，換了一個就好了，后來我就發現有定時功能，每次燒水就定時就好了，用起來挺方便，所以就想著做一個，先在論壇里找一些相關大家分享的，同時正好也是看了郭師傅的視頻后，自己照著寫了一個倒計時，分享給大家，如果有問題歡迎指正。
功能：按下key1鍵進行時間設定，同時時分秒設置完后，最后一次也是開始鍵
      按下key2鍵進行時分秒的加
      按下key3鍵進行時分秒的減
      按下key4鍵會暫停，第二次按會繼續開始，第三次按下就復位

單片機源程序如下:

#include <reg52.h>
#include <intrins.h>
#include <lcd.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P2^0; //設置鍵
sbit key2=P2^1; //加鍵
sbit key3=P2^2; //減鍵
sbit key4=P2^3; //第一次暫停，第二次啟動，第三次初始化
sbit RS=P2^5;
sbit RW=P2^6;
sbit EN=P2^7;
uchar djshi,djfen,djmiao;
uchar r,knum,s;
uchar code table1[]={"daojishi: "};
uchar code table2[]={" 00:00:00 "};
void LcdInit() //LCD初始化子程序
{
uchar i;
lcd_writecom(0x38); //開顯示
lcd_writecom(0x0c); //開顯示不顯示光標
lcd_writecom(0x06); //寫一個指針加1
lcd_writecom(0x01); //清屏
lcd_writecom(0x80); //設置數據指針起點
for(i=0;i<16;i++)
{
lcd_writedate(table1[i]);
}
lcd_writecom(0xc0);
for(i=0;i<16;i++)
{
lcd_writedate(table2[i]);
}
}
void Timer1Init(void) //10毫秒@22.1184MHz
{
TMOD = 0x10; //設置定時器模式
TL1 = 0x00; //設置定時初值
TH1 = 0xB8; //設置定時初值
TR1 = 0; //定時器1開始計時
ET1=1; //定時器1中斷
EA=1; //打開總中斷
}
/*******************************************************************************
* 函數名 : Delay1ms
* 函數功能 : 延時函數，延時1ms
* 輸入 : c
* 輸出 : 無
* 說名 : 該函數是在22.1184MHZ晶振下，12分頻單片機的延時。
*******************************************************************************/
void Delay1ms(uint ms)
{
uint i,j,k;
for(i=0;i<ms;i++)//219.18
{
for(j=0;j<200;j++);//224.61
for(k=0;k<29;k++);//1094.29
} //1221.79
}
void write_sfm(uchar add,uchar date)
{
lcd_writecom(0xc0+add);
lcd_writedate(date/10+0x30);
lcd_writedate(date%10+0x30);
lcd_writecom(0xc0+add+1);
}
void keyscan()
{
if(key1==0)
{
Delay1ms(5);
if(key1==1)
{
knum++;
TR1=0;
while(!key1);
if(knum==1)
{
lcd_writecom(0x0f);
lcd_writecom(0xcb);
}
if(knum==2)
{
lcd_writecom(0xc8);
}
if(knum==3)
{
lcd_writecom(0xc5);
}
if(knum==4)
{
lcd_writecom(0x0c);
knum=0;
TR1=1; //啟動定時器
}
}
}
if(knum==1)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djmiao++;
while(!key2);
if(djmiao==60)
djmiao=0;
lcd_writecom(0xca);
lcd_writedate(djmiao/10+0x30);
lcd_writedate(djmiao%10+0x30);
lcd_writecom(0xcb);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djmiao--;
while(!key3);
if(djmiao==255)
djmiao=59;
lcd_writecom(0xca);
lcd_writedate(djmiao/10+0x30);
lcd_writedate(djmiao%10+0x30);
lcd_writecom(0xcb);
}
}
}
if(knum==2)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djfen++;
while(!key2);
if(djfen==60)
djfen=0;
lcd_writecom(0xc7);
lcd_writedate(djfen/10+0x30);
lcd_writedate(djfen%10+0x30);
lcd_writecom(0xc8);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djfen--;
while(!key3);
if(djfen==255)
djfen=59;
lcd_writecom(0xc7);
lcd_writedate(djfen/10+0x30);
lcd_writedate(djfen%10+0x30);
lcd_writecom(0xc8);
}
}
}
if(knum==3)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djshi++;
while(!key2);
if(djshi==24)
djshi=0;
lcd_writecom(0xc4);
lcd_writedate(djshi/10+0x30);
lcd_writedate(djshi%10+0x30);
lcd_writecom(0xc5);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djshi--;
while(!key3);
if(djshi==255)
djshi=23;
lcd_writecom(0xc4);
lcd_writedate(djshi/10+0x30);
lcd_writedate(djshi%10+0x30);
lcd_writecom(0xc5);
}
}
}
if(key4==0)
{
Delay1ms(5);
if(key4==0)
{
s++;
while(!key4);
if(s==1)
{
TR1=0;
}
if(s==2)
{
TR1=1;
}
if(s==3)
{
s=0;
TR1=0;