mirror of https://github.com/ARMmbed/mbed-os.git
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2017 ARM Limited
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "rtc_api.h"
|
|
#include "device.h"
|
|
#include "cmsis.h"
|
|
|
|
/**
|
|
* \defgroup hal_rtc RTC hal functions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \brief Initialize the RTC peripheral.
|
|
* The RTC starts counting from 0x0 at reset and increments
|
|
* with a frequency of 1hz (clock source: CLK1HZ).
|
|
* The current value can be read through the DATA register
|
|
*/
|
|
void rtc_init(void)
|
|
{
|
|
CMSDK_RTC->RTCCR |= (1 << CMSDK_RTC_ENABLE_Pos);
|
|
}
|
|
|
|
/**
|
|
* \brief Deinitialize the RTC peripheral
|
|
* According to DDI0224B_RTC_PL031_TRM.pdf chapter 3.3.4 there is
|
|
* no reason to implement.
|
|
*/
|
|
void rtc_free(void)
|
|
{
|
|
/* Not supported */
|
|
}
|
|
|
|
/**
|
|
* \brief Get the RTC enable status
|
|
*
|
|
* \return 0 disabled, 1 enabled
|
|
*/
|
|
int rtc_isenabled(void)
|
|
{
|
|
return (CMSDK_RTC->RTCCR & CMSDK_RTC_ENABLE_Msk);
|
|
}
|
|
|
|
/**
|
|
* \brief Get the current time from the RTC peripheral
|
|
*
|
|
* \return The current time in seconds
|
|
*/
|
|
time_t rtc_read(void)
|
|
{
|
|
return (time_t)CMSDK_RTC->RTCDR;
|
|
}
|
|
|
|
/**
|
|
* \brief Set the current time to the RTC peripheral, write it to LOAD register
|
|
*
|
|
* \param[in] t The current time to be set in seconds
|
|
*/
|
|
|
|
void rtc_write(time_t t)
|
|
{
|
|
CMSDK_RTC->RTCLR = (uint32_t)t;
|
|
}
|
|
/**@}*/
|
|
|