100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/** @defgroup rtc_file
|
|
*
|
|
* @ingroup peripheral_apis
|
|
*
|
|
* @brief <b>libopencm3 STM32F4xx RTC</b>
|
|
*
|
|
* @version 1.0.0
|
|
*
|
|
* @date 4 March 2013
|
|
*
|
|
* LGPL License Terms @ref lgpl_license
|
|
*/
|
|
|
|
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <libopencm3/stm32/exti.h>
|
|
#include <libopencm3/cm3/nvic.h>
|
|
#include <libopencm3/stm32/rtc.h>
|
|
|
|
/**@{*/
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Enable the wakeup timer
|
|
@warning You must unlock the registers before using this function
|
|
|
|
*/
|
|
void rtc_enable_wakeup_timer(void)
|
|
{
|
|
RTC_CR |= RTC_CR_WUTE | (RTC_CR_OSEL_WAKEUP << RTC_CR_OSEL_SHIFT);
|
|
rtc_enable_wakeup_timer_interrupt();
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Disable the wakeup timer
|
|
@warning You must unlock the registers before using this function
|
|
|
|
*/
|
|
void rtc_disable_wakeup_timer(void)
|
|
{
|
|
RTC_CR &= ~RTC_CR_WUTE;
|
|
rtc_disable_wakeup_timer_interrupt();
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Enable the wakeup timer interrupt
|
|
@warning You must unlock the registers before using this function
|
|
|
|
*/
|
|
void rtc_enable_wakeup_timer_interrupt(void)
|
|
{
|
|
/* FTFM:
|
|
* To enable the RTC Wakeup interrupt, the following sequence is
|
|
* required:
|
|
* 1. Configure and enable the EXTI Line 22 in interrupt mode and
|
|
* select the rising edge sensitivity.
|
|
*/
|
|
exti_enable_request(EXTI22);
|
|
exti_set_trigger(EXTI22, EXTI_TRIGGER_RISING);
|
|
|
|
/* 2. Configure and enable the RTC_WKUP IRQ channel in the NVIC. */
|
|
nvic_enable_irq(NVIC_RTC_WKUP_IRQ);
|
|
nvic_set_priority(NVIC_RTC_WKUP_IRQ, 1);
|
|
|
|
/* 3. Configure the RTC to generate the RTC wakeup timer event. */
|
|
RTC_CR |= RTC_CR_WUTIE; /* Enable the interrupt */
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Disable the wakeup timer interrupt
|
|
@warning You must unlock the registers before using this function
|
|
|
|
*/
|
|
void rtc_disable_wakeup_timer_interrupt(void)
|
|
{
|
|
/* 1. Disable EXTI Line 22 */
|
|
exti_disable_request(EXTI22);
|
|
|
|
/* 2. Disable RTC_WKUP IRQ channel in the NVIC. */
|
|
nvic_disable_irq(NVIC_RTC_WKUP_IRQ);
|
|
|
|
/* 3. Disable RTC wakeup timer event. */
|
|
RTC_CR &= ~RTC_CR_WUTIE;
|
|
}
|
|
|
|
/**@}*/ |