e2022f5884
to remove errors, duplications and inconsistencies. File lib/stm32/f1/pwr.c - all code removed as it duplicates that in common/pwr_common.c Remaining changes do not affect code. Compiles OK. TODO efm32 has no code so generates no modules TODO F2 needs pwr.c TODO L1 needs dma.h and dma.c
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/** @defgroup rtc_file RTC
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@ingroup STM32F4xx
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@brief <b>libopencm3 STM32F4xx RTC</b>
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@version 1.0.0
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@date 4 March 2013
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LGPL License Terms @ref lgpl_license
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/exti.h>
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#include <libopencm3/stm32/f4/nvic.h>
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#include <libopencm3/stm32/rtc.h>
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#include <libopencm3/stm32/common/rtc_common_bcd.h>
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/*---------------------------------------------------------------------------*/
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/** @brief Enable the wakeup timer
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@warning You must unlock the registers before using this function
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*/
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void rtc_enable_wakeup_timer(void) {
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RTC_CR |= RTC_CR_WUTE | (RTC_CR_OSEL_WAKEUP << RTC_CR_OSEL_SHIFT);
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rtc_enable_wakeup_timer_interrupt();
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Disable the wakeup timer
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@warning You must unlock the registers before using this function
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*/
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void rtc_disable_wakeup_timer(void) {
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RTC_CR &= ~RTC_CR_WUTE;
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rtc_disable_wakeup_timer_interrupt();
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Enable the wakeup timer interrupt
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@warning You must unlock the registers before using this function
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*/
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void rtc_enable_wakeup_timer_interrupt(void) {
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// FTFM:
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// To enable the RTC Wakeup interrupt, the following sequence is required:
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// 1. Configure and enable the EXTI Line 22 in interrupt mode and select the
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// rising edge sensitivity.
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exti_enable_request(EXTI22);
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exti_set_trigger(EXTI22, EXTI_TRIGGER_RISING);
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// 2. Configure and enable the RTC_WKUP IRQ channel in the NVIC.
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nvic_enable_irq(NVIC_RTC_WKUP_IRQ);
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nvic_set_priority(NVIC_RTC_WKUP_IRQ, 1);
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// 3. Configure the RTC to generate the RTC wakeup timer event.
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RTC_CR |= RTC_CR_WUTIE; // Enable the interrupt
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Disable the wakeup timer interrupt
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@warning You must unlock the registers before using this function
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*/
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void rtc_disable_wakeup_timer_interrupt(void) {
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// 1. Disable EXTI Line 22
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exti_disable_request(EXTI22);
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// 2. Disable RTC_WKUP IRQ channel in the NVIC.
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nvic_disable_irq(NVIC_RTC_WKUP_IRQ);
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// 3. Disable RTC wakeup timer event.
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RTC_CR &= ~RTC_CR_WUTIE;
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}
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