#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit S1=P3^0;
sbit flag=P3^7;//???ж?????????
void delay(uint z)
{
uint x,y;
for(x = z; x > 0; x--)
for(y = 114; y > 0 ; y--);
}
//?ж?????
void int1Init()
{
EA = 1;//?????ж?
EX1 = 1;//?????ж?1
IT = 1;//???ж?1????????
}
void int1() interrupt 2
{
P1=~P1;
}
void main()
{
int1Init();
while (1)
{
if(S1==0)
{
delay(20);//????????
if (S1==0)
{
flag=1;
flag=0;
?? while (S1==0);//??????
}
}
}
}
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