clock_common.c

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/** @addtogroup clock_file CLOCK peripheral API
 *
 * @brief <b>Access functions for the Clock Controller</b>
 *
 * @ingroup peripheral_apis
 * LGPL License Terms @ref lgpl_license
 * @author @htmlonly &copy; @endhtmlonly 2016 Maxim Sloyko <maxims@google.com>
 * @author @htmlonly &copy; @endhtmlonly 2021 Eduard Drusa <ventyl86 at netkosice dot sk>
 *
 */
 
/*
 * 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/clock.h>
#include <libopencm3/nrf/periph.h>
/**@{*/
 
/** @brief Start Low Frequency Clock
 *
 * @param[in] wait bool: If true, will busy wait for the clock to start.
 */
void clock_start_lfclk(bool wait)
{
        PERIPH_TRIGGER_TASK(CLOCK_TASK_LFCLKSTART);
        if (wait) {
                while (!(CLOCK_LFCLKSTAT & CLOCK_LFCLKSTAT_STATE));
        }
}
 
/** @brief Stop Low Frequency Clock */
void clock_stop_lfclk()
{
        PERIPH_TRIGGER_TASK(CLOCK_TASK_LFCLKSTOP);
}
 
/** @brief Start High Frequency Crystal Oscillator.
 *
 * @details Oscillator needs to be running for the radio to work.
 *
 * @param[in] wait bool If true, will busy wait for the clock to start.
 */
void clock_start_hfclk(bool wait)
{
        PERIPH_TRIGGER_TASK(CLOCK_TASK_HFCLKSTART);
        if (wait) {
                while (!(CLOCK_HFCLKSTAT & CLOCK_HFCLKSTAT_STATE));
        }
}
 
/** @brief Stop High Frequency Crystal Oscillator */
void clock_stop_hfclk()
{
        PERIPH_TRIGGER_TASK(CLOCK_TASK_HFCLKSTOP);
}
 
/** @brief Low Frequency Clock Source.
 *
 * @param[in] lfclk_src enum clock_lfclk_src
 */
void clock_set_lfclk_src(enum clock_lfclk_src lfclk_src)
{
        CLOCK_LFCLKSRC = lfclk_src;
}
/**@}*/