#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uint i;
sbit k1=P3^1;
sbit led7=P2^7;
void time() interrupt 1
{
TH0=(65536-10000)/256;
TL0=(65536-10000)%256;
i++;
}
void init()
{
TMOD=0X01;
TH0=(65536-10000)/256; //10ms
TL0=(65536-10000)%256;
//EA=1;
ET0=1;
TR0=1;
}
void main()
{
init();
while(1)
{
if(k1==0)
{
led7=0;
i=0;
EA=1;
}
if(i>50)
{
led7=1;
EA=0;
}
}
}
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