shizhl.c

该程序是本人自己编写的AT89S51源程序

#include<reg51.h>
unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char second,minute,hour,dpp,delete;
unsigned char delay;
unsigned char count=0,a=0;
unsigned char vot[4];
void fill(void);
void display(void);
void main(void)
{
   unsigned char temp1;
   second=52;
   minute=59;
   hour=14;
   TMOD=0x00;
   TH0=0x06;
   TL0=0x0c;
   P0=0xff;
   EA=1;
   ET0=1;
   TR0=1;
   P2=0x00;
   dpp=0x80;
   while(1)
   {
      temp1=hour/10;
      if(temp1==0) delete=0xf7;
      else delete=0xff;
      fill();
      display();
      //P2=0x01;
    }
}
void time0(void) interrupt 1 using 1
{
   TH0=0x06;
   TL0=0x0c;
   if(++a==63) {dpp=0x00;a=0;}
   if(++count==126)
   {
      count=0;
      second++;
      dpp=0x80;
      if(second==60)
      {
         second=0;
         minute++;
         if(minute==60)
         {
            minute=0;
            hour++;
            if(hour==24)
            {
               hour=0;
            }
         }
      }
   }
}
void fill(void)
{
   vot[3]=table[hour/10];
   vot[2]=table[hour%10];
   vot[1]=table[minute/10]+dpp;
   vot[0]=table[minute%10]+dpp;
}
void display(void)
{
      P0=vot[0];
      P2=0x01&delete;
      for(delay=0;delay<200;delay++);
      P2=0x00;
      P0=vot[1];
      P2=0x02&delete;
      for(delay=0;delay<200;delay++);
      P2=0x00;
      P0=vot[2];
      P2=0x04&delete;
      for(delay=0;delay<200;delay++);
      P2=0x00;
      P0=vot[3];
      P2=0x08&delete;
      for(delay=0;delay<200;delay++);
      P2=0x00;
}