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72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/*
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* Copyright (C) 2017 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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#pragma once
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/**
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* @ingroup cpu_nrf5x_common
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* @{
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*
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* @file
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* @brief nRF5x shared functions for configuration the system clocks
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief The high frequency clock (HFCLK) uses the internal oscillator per
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* default. Setting this define to 1 will enable the HFXO clock source
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* on boot so it will always be active.
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*/
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#ifndef CLOCK_HFXO_ONBOOT
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#define CLOCK_HFXO_ONBOOT 0
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#endif
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/**
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* @brief Initialize the high frequency clock (HFCLK) as configured in the
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* board's periph_conf.h
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*/
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void clock_init_hf(void);
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/**
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* @brief Request the external high frequency crystal (HFXO) as HF clock
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* source. If this is the first request, the HFXO will be enabled.
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*/
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void clock_hfxo_request(void);
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/**
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* @brief Release the use of the HFXO. If this was the last active request,
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* the HFXO will be disabled
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*/
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void clock_hfxo_release(void);
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/**
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* @brief Start the low frequency clock (LFCLK) as configured in the board's
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* periph_conf.
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*
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* Calling this function while the LFCLK is already running will have no effect.
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*/
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void clock_start_lf(void);
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/**
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* @brief Stop the low frequency clock (LFCLK)
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*
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* @note Be sure that no module is using the LFCLK before you shut it down!
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*/
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void clock_stop_lf(void);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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