timer0.c

来自「T108 LCD屏的DEMO源代码！需要的就下吧」· C语言 代码 · 共 44 行

#include "reg51.h"	 
#include "Global.h"
#include "Timer0.h"

#define OSDTIME 			4000//12500 //25000  //100000  //0x00FF
#define COLORCALTIME		0x0010
#define TIMER0_COUNT		0xFBEF	//FDF7	//0xFF7D
void Timer0Start(void);
void Timer0Stop(void);
void Timer0INT(void) interrupt 1
{
	TL0=TIMER0_COUNT&0x00FF;
	TH0=TIMER0_COUNT>>8;

	if(m_wTimer0Cnt==OSDTIME)
  	{
  		m_bTimer0Overflow=1;   	
	}
	else
		m_wTimer0Cnt++;
}

void Timer0Reset(void)
{
	TL0 = (TIMER0_COUNT & 0x00FF);
	TH0 = (TIMER0_COUNT >> 8);
	m_wTimer0Cnt=0;
	m_bTimer0Overflow=0;

}
			
void Timer0Start(void)
{
	Timer0Reset();
	TR0=1;	
}
			  
void Timer0Stop(void)
{	
	TR0=0;
	Timer0Reset();	
	m_bTimer0Overflow=0;
}