rtc.c

nxp的LPC2888处理器的示例代码.

/*****************************************************************************
 *   rtc.c:  Realtime clock C file for NXP LPC288x Family Microprocessors
 *
 *   Copyright(C) 2006, NXP Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2006.07.12  ver 1.00    Prelimnary version, first Release
 *
*****************************************************************************/
#include "LPC288x.h"                        /* LPC2xxx definitions */
#include "type.h"
#include "irq.h"
#include "timer.h"
#include "rtc.h"

volatile DWORD alarm_on = 0;

/*****************************************************************************
** Function name:	RTCHandler
**
** Descriptions:	RTC interrupt handler, it executes based on the
**					the alarm setting
**
** parameters:		None
** Returned value:	None
** 
*****************************************************************************/
void RTCHandler(void)
{  
  RTC_ILR |= ILR_RTCCIF;		/* clear interrupt flag */
  IENABLE;			/* handles nested interrupt */

  alarm_on = 1;

  IDISABLE;
}

/*****************************************************************************
** Function name:		RTCInit
**
** Descriptions:		Initialize RTC timer
**
** parameters:			None
** Returned value:		None
** 
*****************************************************************************/
void RTCInit( void )
{
  alarm_on = 0;

  /*--- Initialize registers ---*/
  RTC_CFG = 0x01;
  
  RTC_ILR = ILR_RTCCIF | ILR_RTCALF;	/* Clear RTC interrupts */
  
  RTC_AMR = 0;
  RTC_CIIR = 0;
  RTC_CCR = 0;
  return;
}

/*****************************************************************************
** Function name:		RTCStart
**
** Descriptions:		Start RTC timer
**
** parameters:			None
** Returned value:		None
** 
*****************************************************************************/
void RTCStart( void ) 
{
  /*--- Start RTC counters ---*/
  RTC_CCR = CCR_CLKEN | CCR_CTCRST;		/* Enable clock, reset counter */
  RTC_CCR = CCR_CLKEN;
  RTC_ILR = ILR_RTCCIF;					/* Clear interrupt */
  return;
}

/*****************************************************************************
** Function name:		RTCStop
**
** Descriptions:		Stop RTC timer
**
** parameters:			None
** Returned value:		None
** 
*****************************************************************************/
void RTCStop( void )
{   
  /*--- Stop RTC counters ---*/
  RTC_CCR &= ~CCR_CLKEN;
  return;
} 

/*****************************************************************************
** Function name:		RTC_CTCReset
**
** Descriptions:		Reset RTC clock tick counter
**
** parameters:			None
** Returned value:		None
** 
*****************************************************************************/
void RTC_CTCReset( void )
{   
  /*--- Reset CTC ---*/
  RTC_CCR |= CCR_CTCRST;
  RTC_CCR &= ~CCR_CTCRST;
  return;
}

/*****************************************************************************
** Function name:		RTCSetTime
**
** Descriptions:		Setup RTC timer value
**
** parameters:			None
** Returned value:		None
** 
*****************************************************************************/
void RTCSetTime( RTCTime Time ) 
{
  RTC_SEC = Time.RTC_Sec;
  RTC_MIN = Time.RTC_Min;
  RTC_HOUR = Time.RTC_Hour;
  RTC_DOM = Time.RTC_Mday;
  RTC_DOW = Time.RTC_Wday;
  RTC_DOY = Time.RTC_Yday;
  RTC_MONTH = Time.RTC_Mon;
  RTC_YEAR = Time.RTC_Year;    
  return;
}

/*****************************************************************************
** Function name:		RTCSetAlarm
**
** Descriptions:		Initialize RTC timer
**
** parameters:			None
** Returned value:		None
** 
*****************************************************************************/
void RTCSetAlarm( RTCTime Alarm ) 
{   
  RTC_ALSEC = Alarm.RTC_Sec;
  RTC_ALMIN = Alarm.RTC_Min;
  RTC_ALHOUR = Alarm.RTC_Hour;
  RTC_ALDOM = Alarm.RTC_Mday;
  RTC_ALDOW = Alarm.RTC_Wday;
  RTC_ALDOY = Alarm.RTC_Yday;
  RTC_ALMON = Alarm.RTC_Mon;
  RTC_ALYEAR = Alarm.RTC_Year;    
  return;
}

/*****************************************************************************
** Function name:		RTCGetTime
**
** Descriptions:		Get RTC timer value
**
** parameters:			None
** Returned value:		The data structure of the RTC time table
** 
*****************************************************************************/
RTCTime RTCGetTime( void ) 
{
  RTCTime LocalTime;
    
  LocalTime.RTC_Sec = RTC_SEC;
  LocalTime.RTC_Min = RTC_MIN;
  LocalTime.RTC_Hour = RTC_HOUR;
  LocalTime.RTC_Mday = RTC_DOM;
  LocalTime.RTC_Wday = RTC_DOW;
  LocalTime.RTC_Yday = RTC_DOY;
  LocalTime.RTC_Mon = RTC_MONTH;
  LocalTime.RTC_Year = RTC_YEAR;
  return ( LocalTime );    
}

/*****************************************************************************
** Function name:		RTCSetAlarmMask
**
** Descriptions:		Set RTC timer alarm mask
**
** parameters:			Alarm mask setting
** Returned value:		None
** 
*****************************************************************************/
void RTCSetAlarmMask( DWORD AlarmMask ) 
{
  /*--- Set alarm mask ---*/    
  RTC_AMR = AlarmMask;
  return;
}

/*****************************************************************************
**                            End Of File
******************************************************************************/