timer.h

HDMI anx9021的驱动

//********************************************************************************************
//********************************************************************************************
//***************************     Firmware for ANX9021     ***********************************
//********************************************************************************************
//********************************************************************************************

//******************************************************************************
//  ANALOGIX Company 
//  ANX9021 Firmware on AT89C51RC clean for customer
//  Version 1.51	2006/04/27
//******************************************************************************

#ifndef _TIMER_H
#define _TIMER_H

#include "mcu.h"

/* for 14.7456MHz crystal */
#define TINTVAL_8MS	0xda
#define TINTVAL_4MS	0xed
#define TINTVAL_2MS	0xf6
#define TINTVAL_1MS	0xfb

#define UNIT_MS	0x4cc

#define start_timer() do { TR0 = 1; } while (0)
#define stop_timer() do { TR0 = 0; } while (0)

// for 14.7456MHz crystal, Atmel AT89C51xx series
#define DELAY_FACTOR    222

extern xdata char timer_done;
extern unsigned int timer_tick;
extern xdata unsigned char hh, mm, ss;

void init_timer(unsigned char intval);
void timer_isr(void);
void delay_ms(int n);
void timer2_isr(void);
//unsigned long get_timer_tick(void);
//void show_cur_time(void);

#endif