117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
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/** @addtogroup rtc_file RTC peripheral API
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*
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* @brief <b>Access functions for the Real Time Counter Controller </b>
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*
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* @ingroup peripheral_apis
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* LGPL License Terms @ref lgpl_license
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* @author @htmlonly © @endhtmlonly 2016
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* Maxim Sloyko <maxims@google.com>
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*
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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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* Copyright (C) 2017-2018 Unicore MX project<dev(at)lists(dot)unicore-mx(dot)org>
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* Copyright (C) 2021 Eduard Drusa <ventyl86(at)netkosice(dot)sk>
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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/nrf/rtc.h>
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/**@{*/
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/** @brief RTC set Prescaler value.
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*
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* @details The clock needs to be stopped for this to have any effect.
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*
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* @param[in] rtc uint32_t RTC base
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* @param[in] presc uint16_t 12 bit prescaler value.
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*/
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void rtc_set_prescaler(uint32_t rtc, uint16_t presc)
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{
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RTC_PRESCALER(rtc) = presc & 0xfff;
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}
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/** @brief RTC get Counter value.
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*
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* @param[in] rtc uint32_t RTC base
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*/
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uint32_t rtc_get_counter(uint32_t rtc)
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{
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return RTC_COUNTER(rtc);
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}
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/** @brief Enable events
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*
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* @param[in] rtc uint32_t RTC base
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* @param[in] mask uint32_t which events to enable
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*/
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void rtc_enable_events(uint32_t rtc, uint32_t mask)
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{
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RTC_EVTENSET(rtc) = mask;
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}
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/** @brief Disable events
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*
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* @param[in] rtc uint32_t RTC base
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* @param[in] mask uint32_t which events to disable
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*/
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void rtc_disable_events(uint32_t rtc, uint32_t mask)
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{
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RTC_EVTENCLR(rtc) = mask;
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}
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/** @brief Start the RTC
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*
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* @param[in] rtc uint32_t RTC base
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*/
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void rtc_start(uint32_t rtc)
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{
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PERIPH_TRIGGER_TASK(RTC_TASK_START(rtc));
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}
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/** @brief Stop the RTC
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*
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* @param[in] rtc uint32_t RTC base
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*/
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void rtc_stop(uint32_t rtc)
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{
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PERIPH_TRIGGER_TASK(RTC_TASK_STOP(rtc));
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}
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/** @brief Clear the RTC
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*
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* @param[in] rtc uint32_t RTC base
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*/
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void rtc_clear(uint32_t rtc)
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{
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PERIPH_TRIGGER_TASK(RTC_TASK_CLEAR(rtc));
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}
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/** @brief Set compare register
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*
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* @param[in] rtc uint32_t RTC base
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* @param[in] cmp uint8_t compare number (0-3)
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* @param[in] value uint32_t compare value
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*/
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void rtc_set_compare(uint32_t rtc, uint8_t cmp, uint32_t value)
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{
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if (cmp < 4) {
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RTC_CC(rtc, cmp) = value;
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}
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}
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/**@}*/
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