mirror of https://github.com/ARMmbed/mbed-os.git
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/**
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******************************************************************************
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* @file rtc_api.c
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* @brief Implementation of a RTC driver
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* @internal
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* @author ON Semiconductor
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* $Rev: 0.1 $
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* $Date: 2016-01-20 12:09:00 +0530 (Wed, 20 Jan 2016) $
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******************************************************************************
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* Copyright 2016 Semiconductor Components Industries LLC (d/b/a “ON Semiconductor”).
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* All rights reserved. This software and/or documentation is licensed by ON Semiconductor
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* under limited terms and conditions. The terms and conditions pertaining to the software
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* and/or documentation are available at http://www.onsemi.com/site/pdf/ONSEMI_T&C.pdf
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* (“ON Semiconductor Standard Terms and Conditions of Sale, Section 8 Software”) and
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* if applicable the software license agreement. Do not use this software and/or
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* documentation unless you have carefully read and you agree to the limited terms and
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* conditions. By using this software and/or documentation, you agree to the limited
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* terms and conditions.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* ON SEMICONDUCTOR SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
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* INCIDENTAL, OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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* @endinternal
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*
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* @ingroup rtc
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*
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*/
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#include "rtc_api.h"
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#if DEVICE_RTC
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#include "device.h"
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#include "cmsis.h"
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#include "pinmap.h"
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#include "PeripheralPins.h"
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#include "mbed_assert.h"
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#include <string.h>
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#include "rtc.h"
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#include "cmsis_nvic.h"
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#define US_PER_SEC 1000000
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static time_t m_time_base;
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static uint32_t rtc_seconds_get()
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{
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return (uint32_t)((fRtcRead() / US_PER_SEC) & 0xFFFFFFFF);
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}
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/* See rtc_apc.h for description */
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void rtc_init(void)
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{
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fRtcInit();
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}
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/* See rtc_apc.h for description */
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void rtc_free(void)
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{
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fRtcFree();
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}
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/* See rtc_apc.h for description */
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int rtc_isenabled(void)
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{
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return(fIsRtcEnabled());
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}
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/* See rtc_apc.h for description */
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time_t rtc_read(void)
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{
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return m_time_base + rtc_seconds_get();
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}
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/* See rtc_apc.h for description */
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void rtc_write(time_t t)
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{
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uint32_t seconds;
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do {
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seconds = rtc_seconds_get();
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m_time_base = t - seconds;
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/* If the number of seconds indicated by the counter changed during the
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update of the time base, just repeat the update, now using the new
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number of seconds. */
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} while (seconds != rtc_seconds_get());
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}
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#endif /* DEVICE_RTC */
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