51单片机开发板6位数按秒计时程序

#include<reg51.h>

#define uint unsigned int

#define uchar unsigned char

uchar temp,m,a,b,c,d,e,f;

sbit dula=P2^6;

sbit wela=P2^7;

uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void display(uchar a,uchar b,uchar c,uchar d,uchar e,uchar f);

void delay(uint z);

void init();

void main()

{

init();

while(1)

{

if(m==20)

  {

m=0;

temp++;

a=temp/1000000;

b=temp%100000/10000;

c=temp%10000/1000;

d=temp%1000/100;

e=temp%100/10;

f=temp%10;

if(temp==1000000)

   {

temp=0;

   }

  }

display(a,b,c,d,e,f);

}

}

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void display(uchar a,uchar b,uchar c,uchar d,uchar e,uchar f)

{

dula=1;P0=table[a];dula=0;wela=1;P0=0xfe;wela=0;delay(1);P0=0xff;

dula=1;P0=table[b];dula=0;wela=1;P0=0xfd;wela=0;delay(1);P0=0xff;

dula=1;P0=table[c];dula=0;wela=1;P0=0xfb;wela=0;delay(1);P0=0xff;

dula=1;P0=table[d];dula=0;wela=1;P0=0xf7;wela=0;delay(1);P0=0xff;

dula=1;P0=table[e];dula=0;wela=1;P0=0xef;wela=0;delay(1);P0=0xff;

dula=1;P0=table[f];dula=0;wela=1;P0=0xdf;wela=0;delay(1);P0=0xff;

}

void init()

{

wela=0;

dula=0;

temp=0;

TMOD=0x01;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

EA=1;

ET0=1;

PT0=1;

TR0=1;

}

void timer() interrupt 1

{

TR0=0;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

m++;

TR0=1;

}