电子时钟显示电路

单片机程序设计

#include<reg51.h>

unsigned char duanxuan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; unsigned char weixuan[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

unsigned char chushi[]={1,2,10,0,0,10,0,0};

sbit P0_0=P0^0;

sbit P0_1=P0^1;

sbit P0_2=P0^2;

unsigned char second,minite,hour;

unsigned char tcnt=0;

unsigned int k;

void delay05s()

{

for(second=0;second<60;second++)

for(minite=0;minite<60;minite++)

for(hour=0;hour<24;hour++);

}

void main()

{

unsigned char k=0,tcnt=0;

TMOD=0x02;

TH0=(256-250);

TL0=(256-250);

TR0=1;

EA=1;

hour=12;

while(1)

{

if(P0_0==0)

{

delay05s();

if(P0_0==0)

{

second++;

if(second==60)

{

second=0;

}

}

}

chushi[6]=second/10;

单片机程序设计

chushi[7]=second%10; }

while(1)

{

if(P0_1==0)

{

delay05s(); if(P0_1==0) {

minite++; if(minite==60) {

minite=0; }

}

}

chushi[3]=minite/10; chushi[4]=minite%10; }

while(1)

{

if(P0_2==0)

{

delay05s(); if(P0_2==0) {

hour++; if(hour==24) {

hour=0; }

}

}

chushi[0]=hour/10;

chushi[1]=hour%10; }

}

void zhong() interrupt 1 using 1 {

P3=0xff;

P3=weixuan[tcnt];

P1=duanxuan[chushi[tcnt]];

单片机程序设计

} tcnt++; if(tcnt==8) { tcnt=0; } k++; if(k==4000) { k=0; second++; if(second==60) { second=0; minite++; if(minite==60) { minite=0; hour++; if(hour==24) { hour=0; } } } } chushi[6]=second/10; chushi[7]=second%10; chushi[3]=minite/10; chushi[4]=minite%10; chushi[0]=hour/10; chushi[1]=hour%10;