时钟编程到二十点后就不动了，问原因

只看该作者 · 2011-5-26 19:02

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar aa,num1,s,h2,h1,m1,m2;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void display(uchar ,uchar ,uchar,uchar);
   void delay(uint z)
{
uint t1,y;
for(t1=z;t1>0;t1--)
  for(y=110;y>0;y--);
}
void main()
{
m1=0;
h2=0;
h1=0;
m2=0;
  P2=0x0f;
  s=0;
aa=0;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
while(1)
{
   display ( h2,h1,m2, m1);

}

}



void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
      if(aa==1)
{

aa=0;
s=s+1;

   if(s==1)
   {  s=0;
      m1++;
if(m1==10)
   { m1=0;
      m2=m2+1;
   if(m2==6)
   { m2=0;
   h1=h1+1;
   if(h1==10)
      {  h1=0;
      h2=h2+1;
      while(h2==2)
   {  h1=0;
      if(h1==5)

      {  m1=0;m2=0;h1=0;h2=0;

      }


   }



   }

   }
   }
      }





      }

}
   void display(uchar num1,uchar m2,uchar h1,uchar h2)
{

      P2=0xef;

      P0=table[num1];
delay(2) ;
   P2=0xdf;
   P0=table[m2];
delay(2) ;
   P2=0xbf;
   P0=table[h1];
delay(2);
   P2=0x7f;
   P0=table[h2];
   delay(2);
}
特别是下面写的程序好像不能运行，请帮忙
   while(h2==2)
   {  h1=0;
      if(h1==5)

      {  m1=0;m2=0;h1=0;h2=0;