xllp_rtc.c

Xcale270Bsp包,wince平台

/******************************************************************************
**
**  COPYRIGHT (C) 2002 Intel Corporation.
**
**  This software as well as the software described in it is furnished under
**  license and may only be used or copied in accordance with the terms of the
**  license. The information in this file is furnished for informational use
**  only, is subject to change without notice, and should not be construed as
**  a commitment by Intel Corporation. Intel Corporation assumes no
**  responsibility or liability for any errors or inaccuracies that may appear
**  in this document or any software that may be provided in association with
**  this document. 
**  Except as permitted by such license, no part of this document may be 
**  reproduced, stored in a retrieval system, or transmitted in any form or by
**  any means without the express written consent of Intel Corporation. 
**
**  FILENAME:   xllp_rtc.c
**
**  PURPOSE:    contains XLLP RTC primitives.
**
******************************************************************************/

#include "xllp_defs.h"
#include "xllp_rtc.h"

//
// Configures the RTC Alarm to cause an interrupt at the designated time.
// Upon completion of this routine, the RTC alarm is armed and enabled.
//
// Inputs:
//  pRTCHandle  - handle to a structure containing the RTC and INTC base register addresses.
//  alarmtime   - the unsigned 32-bit value to assign to the RTC alarm register.
//
void XllpRtcConfigureAlarm (P_XLLP_RTC_HANDLE_T pRTCHandle, XLLP_UINT32_T alarmtime)
{
    P_XLLP_RTC_T      pRTCRegs =  pRTCHandle->pRTCRegs;
    P_XLLP_INTC_T     pINTCRegs = pRTCHandle->pINTCRegs;


    //disable the RTC alarm interrupt
    pRTCRegs->rtsr &= (~(XLLP_RTSR_MASK | XLLP_RTSR_RESERVED_BITS | XLLP_RTSR_ALE));

    //clear any current RTC alarm interrupt
    pRTCRegs->rtsr &= (~(XLLP_RTSR_MASK | XLLP_RTSR_RESERVED_BITS) | XLLP_RTSR_AL);

    //
    // Set the Alarm value
    //
    pRTCRegs->rtar = alarmtime;

    // Enable the RTC alarm interrupt
    pRTCRegs->rtsr = (pRTCRegs->rtsr & ~(XLLP_RTSR_MASK | XLLP_RTSR_RESERVED_BITS)) | XLLP_RTSR_ALE;

    // Unmask alarm interrupt   
    pINTCRegs->icmr |= XLLP_INTC_RTCALARM;


    return;
}