求大神看看，新手写的程序，哪错了啊？

只看该作者 · 2012-9-5 19:30

为啥中断会持续调用啊？？我只是在满足条件if(num2==1)的时候调用了一次而已啊！求大神开导，万分感谢
#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar num2,num,t,temp,temp1;
sbit beep=P1^5;
uchar code table1[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uchar code table2[]={
0x7f,0xbf,0xdf};
void timer0();
void delay (uint);
void delay (uint z)
{

uint x,y;

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

for(y=110;y>0;y--);
}
void main()
{
beep=0;

t=0;

EA=1;

ET0=1;

//TF0=1

TMOD=0x01;

TR0=1;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

while(1)

{

P0=table1[num];

P2=table2[num2];

delay(800);

num++;

if(num==10)

{

num=0;

num2++;

/*
timer0();*/

}

if(num2==2)

{

num2=0;

beep=1;

}

if(num2==1)

{

timer0();

P0=0xff;

}
}
}
void timer0() interrupt 1
{

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

t++;

//P0=0xff;

if(t==20)

{

t=0;

beep=1;

P2=0xff;

delay(300);

P2=table2[num2];

beep=0;

delay(300);

}
}