#include<reg51.h>
int main(void)
{
unsigned char counter
TMOD=0x01;
TH0=(65536-46083)/256;
TL0=(65536-46083)%256;
TF0=0;
P0=0xff;
counter=0;
TR0=1;
while(1)
{
while(TF0==1)
{
counter++;
if(counter==20)
{
__________
counter=0;
}
TH0=(65536-46083)/256;
TL0=(65536-46083)%256;
}
}
}
P0=~P0;
P0=0;
P0=1;