lora-car/libopencm3/lib/nrf/common/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;
}
}
/**@}*/