text1.c

定时器应用程序

#include <reg52.h>
sbit  P0_0=P0^0;
unsigned char count=0;
void int0(void) interrupt  1 using 1
{
					TH0=0xb1;
					TL0=0xdf;
					count++;
					if(count>=50)
					{
							count=0;
							P0_0=~P0_0;
					}
}
	void main (void)
{
		TMOD=0x01;
		TH0=0xb1;
		TL0=0xdf;
		TR0=1;
		ET0=1;
		EA=1;
		while(1);
}