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Diffstat (limited to 'drivers_nrf/clock/nrf_drv_clock.h')
| -rw-r--r-- | drivers_nrf/clock/nrf_drv_clock.h | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/drivers_nrf/clock/nrf_drv_clock.h b/drivers_nrf/clock/nrf_drv_clock.h new file mode 100644 index 0000000..ba9520d --- /dev/null +++ b/drivers_nrf/clock/nrf_drv_clock.h @@ -0,0 +1,314 @@ +/** + * Copyright (c) 2016 - 2017, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#ifndef NRF_DRV_CLOCK_H__ +#define NRF_DRV_CLOCK_H__ + +#include <stdbool.h> +#include <stdint.h> +#include "sdk_errors.h" +#include "nrf_assert.h" +#include "nrf_clock.h" +#include "sdk_config.h" +#include "nrf_drv_common.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * + * @addtogroup nrf_clock Clock HAL and driver + * @ingroup nrf_drivers + * @brief Clock APIs. + * @details The clock HAL provides basic APIs for accessing the registers of the clock. + * The clock driver provides APIs on a higher level. + * + * @defgroup nrf_drv_clock Clock driver + * @{ + * @ingroup nrf_clock + * @brief Driver for managing the low-frequency clock (LFCLK) and the high-frequency clock (HFCLK). + */ + +/** + * @brief Clock events. + */ +typedef enum +{ + NRF_DRV_CLOCK_EVT_HFCLK_STARTED, ///< HFCLK has been started. + NRF_DRV_CLOCK_EVT_LFCLK_STARTED, ///< LFCLK has been started. + NRF_DRV_CLOCK_EVT_CAL_DONE, ///< Calibration is done. + NRF_DRV_CLOCK_EVT_CAL_ABORTED, ///< Calibration has been aborted. +} nrf_drv_clock_evt_type_t; + +/** + * @brief Clock event handler. + * + * @param[in] event Event. + */ +typedef void (*nrf_drv_clock_event_handler_t)(nrf_drv_clock_evt_type_t event); + +// Forward declaration of the nrf_drv_clock_handler_item_t type. +typedef struct nrf_drv_clock_handler_item_s nrf_drv_clock_handler_item_t; + +struct nrf_drv_clock_handler_item_s +{ + nrf_drv_clock_handler_item_t * p_next; ///< A pointer to the next handler that should be called when the clock is started. + nrf_drv_clock_event_handler_t event_handler; ///< Function to be called when the clock is started. +}; + +/** + * @brief Function for checking if driver is already initialized + * + * This function is used to check whatever common POWER_CLOCK common interrupt + * should be disabled or not if @ref nrf_drv_power tries to disable the interrupt. + * + * @retval true Driver is initialized + * @retval false Driver is uninitialized + */ +bool nrf_drv_clock_init_check(void); + +/** + * @brief Function for initializing the nrf_drv_clock module. + * + * After initialization, the module is in power off state (clocks are not requested). + * + * @retval NRF_SUCCESS If the procedure was successful. + * @retval NRF_ERROR_MODULE_ALREADY_INITIALIZED If the driver was already initialized. + */ +ret_code_t nrf_drv_clock_init(void); + +/** + * @brief Function for uninitializing the clock module. + * + */ +void nrf_drv_clock_uninit(void); + +/** + * @brief Function for requesting the LFCLK. + * + * The low-frequency clock can be requested by different modules + * or contexts. The driver ensures that the clock will be started only when it is requested + * the first time. If the clock is not ready but it was already started, the handler item that is + * provided as an input parameter is added to the list of handlers that will be notified + * when the clock is started. If the clock is already enabled, user callback is called from the + * current context. + * + * The first request will start the selected LFCLK source. If an event handler is + * provided, it will be called once the LFCLK is started. If the LFCLK was already started at this + * time, the event handler will be called from the context of this function. Additionally, + * the @ref nrf_drv_clock_lfclk_is_running function can be polled to check if the clock has started. + * + * @note When a SoftDevice is enabled, the LFCLK is always running and the driver cannot control it. + * + * @note The handler item provided by the user cannot be an automatic variable. + * + * @param[in] p_handler_item A pointer to the event handler structure. + */ +void nrf_drv_clock_lfclk_request(nrf_drv_clock_handler_item_t * p_handler_item); + +/** + * @brief Function for releasing the LFCLK. + * + * If there are no more requests, the LFCLK source will be stopped. + * + * @note When a SoftDevice is enabled, the LFCLK is always running. + */ +void nrf_drv_clock_lfclk_release(void); + +/** + * @brief Function for checking the LFCLK state. + * + * @retval true If the LFCLK is running. + * @retval false If the LFCLK is not running. + */ +bool nrf_drv_clock_lfclk_is_running(void); + +/** + * @brief Function for requesting the high-accuracy source HFCLK. + * + * The high-accuracy source + * can be requested by different modules or contexts. The driver ensures that the high-accuracy + * clock will be started only when it is requested the first time. If the clock is not ready + * but it was already started, the handler item that is provided as an input parameter is added + * to the list of handlers that will be notified when the clock is started. + * + * If an event handler is provided, it will be called once the clock is started. If the clock was already + * started at this time, the event handler will be called from the context of this function. Additionally, + * the @ref nrf_drv_clock_hfclk_is_running function can be polled to check if the clock has started. + * + * @note If a SoftDevice is running, the clock is managed by the SoftDevice and all requests are handled by + * the SoftDevice. This function cannot be called from all interrupt priority levels in that case. + * @note The handler item provided by the user cannot be an automatic variable. + * + * @param[in] p_handler_item A pointer to the event handler structure. + */ +void nrf_drv_clock_hfclk_request(nrf_drv_clock_handler_item_t * p_handler_item); + +/** + * @brief Function for releasing the high-accuracy source HFCLK. + * + * If there are no more requests, the high-accuracy source will be released. + */ +void nrf_drv_clock_hfclk_release(void); + +/** + * @brief Function for checking the HFCLK state. + * + * @retval true If the HFCLK is running (for \nRFXX XTAL source). + * @retval false If the HFCLK is not running. + */ +bool nrf_drv_clock_hfclk_is_running(void); + +/** + * @brief Function for starting a single calibration process. + * + * This function can also delay the start of calibration by a user-specified value. The delay will use + * a low-power timer that is part of the CLOCK module. @ref nrf_drv_clock_is_calibrating can be called to + * check if calibration is still in progress. If a handler is provided, the user can be notified when + * calibration is completed. The ext calibration can be started from the handler context. + * + * The calibration process consists of three phases: + * - Delay (optional) + * - Requesting the high-accuracy HFCLK + * - Hardware-supported calibration + * + * @param[in] delay Time after which the calibration will be started (in 0.25 s units). + * @param[in] handler NULL or user function to be called when calibration is completed or aborted. + * + * @retval NRF_SUCCESS If the procedure was successful. + * @retval NRF_ERROR_FORBIDDEN If a SoftDevice is present or the selected LFCLK source is not an RC oscillator. + * @retval NRF_ERROR_INVALID_STATE If the low-frequency clock is off. + * @retval NRF_ERROR_BUSY If calibration is in progress. + */ +ret_code_t nrf_drv_clock_calibration_start(uint8_t delay, nrf_drv_clock_event_handler_t handler); + +/** + * @brief Function for aborting calibration. + * + * This function aborts on-going calibration. If calibration was started, it cannot be stopped. If a handler + * was provided by @ref nrf_drv_clock_calibration_start, this handler will be called once + * aborted calibration is completed. @ref nrf_drv_clock_is_calibrating can also be used to check + * if the system is calibrating. + * + * @retval NRF_SUCCESS If the procedure was successful. + * @retval NRF_ERROR_FORBIDDEN If a SoftDevice is present or the selected LFCLK source is not an RC oscillator. + */ +ret_code_t nrf_drv_clock_calibration_abort(void); + +/** + * @brief Function for checking if calibration is in progress. + * + * This function indicates that the system is + * in calibration if it is in any of the calibration process phases (see @ref nrf_drv_clock_calibration_start). + * + * @param[out] p_is_calibrating True if calibration is in progress, false if not. + * + * @retval NRF_SUCCESS If the procedure was successful. + * @retval NRF_ERROR_FORBIDDEN If a SoftDevice is present or the selected LFCLK source is not an RC oscillator. + */ +ret_code_t nrf_drv_clock_is_calibrating(bool * p_is_calibrating); + +/**@brief Function for returning a requested task address for the clock driver module. + * + * @param[in] task One of the peripheral tasks. + * + * @return Task address. + */ +__STATIC_INLINE uint32_t nrf_drv_clock_ppi_task_addr(nrf_clock_task_t task); + +/**@brief Function for returning a requested event address for the clock driver module. + * + * @param[in] event One of the peripheral events. + * + * @return Event address. + */ +__STATIC_INLINE uint32_t nrf_drv_clock_ppi_event_addr(nrf_clock_event_t event); + + +#ifdef SOFTDEVICE_PRESENT +/** + * @brief Function called by the SoftDevice handler if an @ref nrf_soc event is received from the SoftDevice. + * + * @param[in] evt_id One of NRF_SOC_EVTS values. + */ +void nrf_drv_clock_on_soc_event(uint32_t evt_id); + +/** + * @brief Function called by the SoftDevice handler when the SoftDevice has been enabled. + * + * This function is called just after the SoftDevice has been properly enabled. + * Its main purpose is to mark that LFCLK has been requested by SD. + */ +void nrf_drv_clock_on_sd_enable(void); + +/** + * @brief Function called by the SoftDevice handler when the SoftDevice has been disabled. + * + * This function is called just after the SoftDevice has been properly disabled. + * It has two purposes: + * 1. Releases the LFCLK from the SD. + * 2. Reinitializes an interrupt after the SD releases POWER_CLOCK_IRQ. + */ +void nrf_drv_clock_on_sd_disable(void); + +#endif +/** + *@} + **/ + +#ifndef SUPPRESS_INLINE_IMPLEMENTATION +__STATIC_INLINE uint32_t nrf_drv_clock_ppi_task_addr(nrf_clock_task_t task) +{ + return nrf_clock_task_address_get(task); +} + +__STATIC_INLINE uint32_t nrf_drv_clock_ppi_event_addr(nrf_clock_event_t event) +{ + return nrf_clock_event_address_get(event); +} +#endif //SUPPRESS_INLINE_IMPLEMENTATION + +/*lint --flb "Leave library region" */ + +#ifdef __cplusplus +} +#endif + +#endif // NRF_CLOCK_H__ |