基于51单片机的1602时钟

基于51单片机的1602时钟

基于51单片机的1602时钟，并使用1602显示倒计时。可通过按钮设置时间。经过调试验证。

源代码：

#include"reg52.h"

#include"def.h"

uchar code table3[] =" Time ";

uchar code table4[]=" 23:59:57 ";

uchar TH0_shu,TL0_shu;

uchar Tcount;

uchar shi,fen,miao;

sbit choice=P2^0;

sbit plus=P2^1;

sbit substract=P2^2;

uchar Kcount;

#include"LCD1602.h"

void TIMER0_Init()

{

TMOD=0x01;

TH0_shu=(65536-50000)/256;

TL0_shu=(65536-50000)%256;

TH0=TH0_shu;

TL0=TL0_shu;

EA=1;

ET0=1;

TR0=1;

}

void main()

{

uchar shiw,ge;

LCD_Init();

TIMER0_Init(); xieshuzu(table3,0x80); xieshuzu(table4,0xc0);

shi=23;

fen=59;

miao=57;

Kcount=0;

for(;;)

{

if(Kcount==0)

{

if(Tcount>=20)

{

Tcount=0;

miao++;

}

if(miao>=60)

{

miao=0;

fen++;

}

if(fen>=60)

{

fen=0;

shi++;

}

if(shi>=24)

{

shi=0;

}

}

shiw=miao/10;

ge=miao%10;

xies(ge,0xca);

xies(shiw,0xc9);

shiw=fen/10;

ge=fen%10;

xies(ge,0xc7);

xies(shiw,0xc6);

shiw=shi/10;

ge=shi%10;

xies(ge,0xc4);

xies(shiw,0xc3);

if(choice==0)

delay(10);

{

if(choice==0)

Kcount++;

while(choice==0);

}

if(Kcount>=4)

Kcount=0;

if(Kcount==0)

{

TR0=1;

writec(0x0c);

}

else

{

TR0=0;

writec(0x0f);

}

if((Kcount>=1)&&(Kcount<=3))

{

if(plus==0)

delay(10);

if(plus==0)

{

switch(Kcount)

{

case(1):shi++;break;

case(2):fen++;break;

case(3):miao++;break;

default:break;

}

}

while(plus==0);

if(substract==0)

delay(10);

if(substract==0)

{

switch(Kcount)

{

case(1):shi--;break;

case(2):fen--;break;

case(3):miao--;break;

default:break;

}

}

while(substract==0);

if(fen>=60) fen=0;

if(miao>=60) miao=0;

if(shi>=24) shi=0;

}

};

}

void Intt0() interrupt 1

{

EA=0;

TH0=TH0_shu;

TL0=TL0_shu;

Tcount++;

EA=1;

}

sbit LCD_E=P3^4;

sbit LCD_RS=P3^5;

sbit LCD_RW=P3^6;

sfr LCD_DA TE=0x80;

uchar code table[] =" 0717014031 "; uchar code table2[]=" BYSJ ";

/***********************/

void writec(uint com)

{

LCD_E=0;

LCD_RS=0;

LCD_RW=0;

LCD_DA TE=com;

delay(1);

LCD_E=1;

delay(2);

LCD_E=0;

delay(1);

LCD_RW=1;

}

/***********************/

void writed(uint dat)

{

LCD_E=0;

LCD_RS=1;

LCD_RW=0;

LCD_DA TE=dat;

delay(1);

LCD_E=1;

delay(2);

LCD_E=0;

delay(1);

LCD_RW=1;

}

/***********************/

void xies(uchar a,uchar add)

{

writec(add);