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#include<reg52.h>
sbit LED=P1^2;
void Init_Timer1(void)
{
TMOD |= 0x10;
TH1=0x00;
TL1=0x00;
EA=1;
ET1=1;
TR1=1;
}
main()
{
Init_Timer1();
while(1);
}
void Timer1_isr(void) interrupt 3 using 1
{
TH1=0x00;
TL1=0x00;
LED=~LED;
}