time0.c

采用C语言编程

#include "reg52.h"

#define uchar unsigned char

uchar cTimeFlag = 0;

void TimerInit()
{
	TMOD = 0x21;
	TH1 = 0xF3;
	TH0 = 0x4c;
	TL0 = 0x00;
	TCON = 0x50;
	ET0 = 1;
	EA = 1;
}

void timer0 () interrupt 1 using 1
{   										// Int Vector at 000BH, Reg Bank 1
	TH0 = 0x4c;
	TL0 = 0x00;
	cTimeFlag = 1;
}