数字时钟程序，带原理图，protues仿真

#include <AT89X52.H>

#include <intrins.h>

#define REST P3_4

#define SCLK P3_7

#define DATA P3_6

unsigned char code displayCode[]={0xc0,0xf9,0xa4,0xb0,0x99,

0x92,0x82,0xf8,0x80,0x90};

unsigned char code controladdress[]={0x80,0x82,0x84,0x86,0x88,

bit bdata modeselect;

void delay();

void writetime();

void display(unsigned char temp,unsigned char mode);

void sound()

{

while(num<2000)

{

P3_0=0;

}

IE=0xCF;

IT0=1;

IT1=1;

T2CON=0;

RCAP2L=0xf0;

RCAP2H=0x1f;

TH2=0x1c;

TL2=0xf0;

IP=0X06;

TH1=0X48;

TR0=1;

PCON=0x01;

hour=12;

minute=0;

second=0;

day=16;

month=8;

week=7;

year=9;

}

void interrupt0()interrupt 0 using 3

{

TR1=1;

select++;

if(select==8)

}

void timer0()interrupt 1 using 3

{

if(num==5000)

{

num=0;

second++;

}

if(second>=60)

{

if(minute>=60)

{

hour++;

minute=0;

}

if(hour>=24)

hour=0;

case 4:{

hour++;

if(hour>=24)

hour=0;

break;

}

case 5:{

minute++;

if(minute>=60)

minute=0;

break;

}

clockhour++;

if(clockhour>=24)

clockhour=0;

break;

}

case 3:{

clockminute++;

}

default:{

modeselect=0;

ET2=!ET2;

break;

}

{

if(second==oneminute)

{

select=0;

TR1=0;

}

}

}

void timer2()interrupt 5 using 3

}

void delay()

{

while(--i)

{

;

}

}

void display(unsigned char temp,unsigned char mode)

{