单片机stc89c52 1602液晶显示倒计时分秒按键可以设置

ID:388477 · 发表于 2020-3-13 16:06

   做这个倒计时，主要家里的电磁炉经常烧热水，最近一次就烧干锅了，就坏掉了，拆开之后线盘烧断了，换了一个就好了，后来我就发现有定时功能，每次烧水就定时就好了，用起来挺方便，所以就想着做一个，先在论坛里找一些相关大家分享的，同时正好也是看了郭师傅的视频后，自己照着写了一个倒计时，分享给大家，如果有问题欢迎指正。
功能：按下key1键进行时间设定，同时时分秒设置完后，最后一次也是开始键
      按下key2键进行时分秒的加
      按下key3键进行时分秒的减
      按下key4键会暂停，第二次按会继续开始，第三次按下就复位

单片机源程序如下:

#include <reg52.h>
#include <intrins.h>
#include <lcd.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P2^0; //设置键
sbit key2=P2^1; //加键
sbit key3=P2^2; //减键
sbit key4=P2^3; //第一次暂停，第二次启动，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); //开显示
lcd_writecom(0x0c); //开显示不显示光标
lcd_writecom(0x06); //写一个指针加1
lcd_writecom(0x01); //清屏
lcd_writecom(0x80); //设置数据指针起点
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; //设置定时器模式
TL1 = 0x00; //设置定时初值
TH1 = 0xB8; //设置定时初值
TR1 = 0; //定时器1开始计时
ET1=1; //定时器1中断
EA=1; //打开总中断
}
/*******************************************************************************
* 函数名 : Delay1ms
* 函数功能 : 延时函数，延时1ms
* 输入 : c
* 输出 : 无
* 说名 : 该函数是在22.1184MHZ晶振下，12分频单片机的延时。
*******************************************************************************/
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; //启动定时器
}
}
}
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;