08-定时器及其应用

#include "reg52.h"

sbit L1 = P0^0;
sbit L8 = P0^7;

void SelectHC573()
{
	P2 = (P2&0x1f) | 0x80;
}

//==========================
void InitTimer0()
{
	TMOD = 0x01;
	TH0 = (65535 - 50000) / 256;
	TL0 = (65535 - 50000) % 256;
	
	ET0 = 1;
	EA = 1;
	TR0 = 1;
}

unsigned char count = 0;
void ServiceTimer0() interrupt 1
{
	TH0 = (65535 - 50000) / 256;
	TL0 = (65535 - 50000) % 256;
	count++;
	if(count %10 == 0)
	{
		L1 = ~L1;
	}
	if(count == 100)
	{
		L8 = ~L8;
		count  = 0;
	}
}

//=========================

void main()
{
	
	SelectHC573();
	InitTimer0();
	while(1)
	{
		
	}
}