timer.c

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/**************************************************************************************************
 *                                                                          
 * Copyright (c) 2001 - 2003 Winbond Electronics Corp. All rights reserved.      
 *                                                                         
 * FILENAME
 *     timer.c
 *
 * VERSION
 *     1.0
 *
 * DESCRIPTION
 *     This file contains the timer initial routine and timer ISR.
 *
 * DATA STRUCTURES
 *     None
 *
 * FUNCTIONS
 *     1. TimerX_ISR()
 *     2. TimerInitialize()
 *     3. ShowCurTime()
 *
 * HISTORY
 *     04/14/2003		 Ver 1.0 Created by PC30 MNCheng
 *
 * REMARK
 *     None
 *     
 *************************************************************************************************/
#include <stdio.h>
#include "740defs.h"

volatile uint32 cur_ticks = 0; //1 sec = 100 ticks


void TimerX_ISR()
{
  cur_ticks++;
  
  TISR = 0; 
}


void TimerInitialize(int channel)
{
  
  Disable_Int(TIMERINT0+channel); 
  
  if (channel == 0)
  {
      //TCR0  = 0x68000000;    /* CE=1, IE=1, periodic mode, pre-scaler=1 */
      //TICR0 = (EXT_CLOCK_RATE / TICKS_PER_SEC); /* timer initial count */
      outpw(TCR0, 0x68000000);
      outpw(TICR0, (EXT_CLOCK_RATE / TICKS_PER_SEC));
  }
  else
  {
      //TCR1  = 0x68000000;    /* CE=1, IE=1, periodic mode, pre-scaler=1 */
      //TICR1 = (EXT_CLOCK_RATE / TICKS_PER_SEC); /* timer initial count */
      outpw(TCR1, 0x68000000);
      outpw(TICR1, (EXT_CLOCK_RATE / TICKS_PER_SEC));
  }
  
  SetIntISR(TIMERINT0+channel, TimerX_ISR);  
  Enable_Int(TIMERINT0+channel);

} /* end Timer Initialize */



void ShowCurTime()
{
  volatile uint32 t_hr, t_min, t_sec;
  uint32 ticks;
  
  ticks = cur_ticks; //get current tick count !  

  t_sec = ticks / TICKS_PER_SEC;
  t_min = t_sec / 60;
  t_sec %= 60;
  
  t_hr = t_min / 60;
  t_min %= 60;

  UART_printf("RUNNING TIME - %2d : %2d : %2d\n", t_hr, t_min, t_sec);
  
  UART_printf("%c[1A", 0x1B);
}