rtc.c

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/** @addtogroup rtc_file RTC peripheral API
 *
 * @brief <b>Access functions for the Real Time Counter Controller </b>
 *
 * @ingroup peripheral_apis
 * LGPL License Terms @ref lgpl_license
 * @author @htmlonly &copy; @endhtmlonly 2016
 * Maxim Sloyko <maxims@google.com>
 *
 */
 
/*
 * This file is part of the libopencm3 project.
 *
 * Copyright (C) 2017-2018 Unicore MX project<dev(at)lists(dot)unicore-mx(dot)org>
 * Copyright (C) 2021 Eduard Drusa <ventyl86(at)netkosice(dot)sk>
 *
 * 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/nrf/rtc.h>
/**@{*/
 
/** @brief RTC set Prescaler value.
 *
 * @details The clock needs to be stopped for this to have any effect.
 *
 * @param[in] rtc uint32_t RTC base
 * @param[in] presc uint16_t 12 bit prescaler value.
 */
void rtc_set_prescaler(uint32_t rtc, uint16_t presc)
{
        RTC_PRESCALER(rtc) = presc & 0xfff;
}
 
/** @brief RTC get Counter value.
 *
 * @param[in] rtc uint32_t RTC base
 */
uint32_t rtc_get_counter(uint32_t rtc)
{
        return RTC_COUNTER(rtc);
}
 
/** @brief Enable events
 *
 * @param[in] rtc uint32_t RTC base
 * @param[in] mask uint32_t which events to enable
 */
void rtc_enable_events(uint32_t rtc, uint32_t mask)
{
        RTC_EVTENSET(rtc) = mask;
}
 
/** @brief Disable events
 *
 * @param[in] rtc uint32_t RTC base
 * @param[in] mask uint32_t which events to disable
 */
void rtc_disable_events(uint32_t rtc, uint32_t mask)
{
        RTC_EVTENCLR(rtc) = mask;
}
 
/** @brief Start the RTC
 *
 * @param[in] rtc uint32_t RTC base
 */
void rtc_start(uint32_t rtc)
{
        PERIPH_TRIGGER_TASK(RTC_TASK_START(rtc));
}
 
/** @brief Stop the RTC
 *
 * @param[in] rtc uint32_t RTC base
 */
void rtc_stop(uint32_t rtc)
{
        PERIPH_TRIGGER_TASK(RTC_TASK_STOP(rtc));
}
 
/** @brief Clear the RTC
 *
 * @param[in] rtc uint32_t RTC base
 */
void rtc_clear(uint32_t rtc)
{
        PERIPH_TRIGGER_TASK(RTC_TASK_CLEAR(rtc));
}
 
/** @brief Set compare register
 *
 * @param[in] rtc uint32_t RTC base
 * @param[in] cmp uint8_t compare number (0-3)
 * @param[in] value uint32_t compare value
 */
void rtc_set_compare(uint32_t rtc, uint8_t cmp, uint32_t value)
{
        if (cmp < 4) {
                RTC_CC(rtc, cmp) = value;
        }
}
/**@}*/