long int desborde;
sfr TMOD = 0x89;
sfr TCON = 0x88;
sfr P0 = 0x80;
sfr TL = 0x8A;
sfr TH = 0x8C;
sbit TR0 = TCON^4 ;
sbit TF0 = TCON^5 ;

main(){
TMOD=0x01;
TCON=0x10;
P0=0x00;
desborde = 0;
TL=0x00;
TH=0x00;
while(1){

while (desborde<184){
if(TF0 == 1){
desborde++;
TF0=0;
}
}
desborde=0;
P0=~P0;

}
}