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518 lines
18 KiB
C
518 lines
18 KiB
C
/*
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* Copyright (c) 2015 - 2019, Nordic Semiconductor ASA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef NRF_PDM_H_
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#define NRF_PDM_H_
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#include <nrfx.h>
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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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* @defgroup nrf_pdm_hal PDM HAL
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* @{
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* @ingroup nrf_pdm
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* @brief Hardware access layer for managing the Pulse Density Modulation (PDM) peripheral.
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*/
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/** @brief Minimum value of PDM gain. */
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#define NRF_PDM_GAIN_MINIMUM 0x00
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/** @brief Default value of PDM gain. */
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#define NRF_PDM_GAIN_DEFAULT 0x28
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/** @brief Maximum value of PDM gain. */
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#define NRF_PDM_GAIN_MAXIMUM 0x50
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/** @brief PDM gain type. */
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typedef uint8_t nrf_pdm_gain_t;
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/** @brief PDM tasks. */
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typedef enum
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{
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NRF_PDM_TASK_START = offsetof(NRF_PDM_Type, TASKS_START), ///< Starts continuous PDM transfer.
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NRF_PDM_TASK_STOP = offsetof(NRF_PDM_Type, TASKS_STOP) ///< Stops PDM transfer.
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} nrf_pdm_task_t;
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/** @brief PDM events. */
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typedef enum
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{
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NRF_PDM_EVENT_STARTED = offsetof(NRF_PDM_Type, EVENTS_STARTED), ///< PDM transfer is started.
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NRF_PDM_EVENT_STOPPED = offsetof(NRF_PDM_Type, EVENTS_STOPPED), ///< PDM transfer is finished.
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NRF_PDM_EVENT_END = offsetof(NRF_PDM_Type, EVENTS_END) ///< The PDM has written the last sample specified by SAMPLE.MAXCNT (or the last sample after a STOP task has been received) to Data RAM.
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} nrf_pdm_event_t;
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/** @brief PDM interrupt masks. */
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typedef enum
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{
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NRF_PDM_INT_STARTED = PDM_INTENSET_STARTED_Msk, ///< Interrupt on EVENTS_STARTED event.
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NRF_PDM_INT_STOPPED = PDM_INTENSET_STOPPED_Msk, ///< Interrupt on EVENTS_STOPPED event.
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NRF_PDM_INT_END = PDM_INTENSET_END_Msk ///< Interrupt on EVENTS_END event.
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} nrf_pdm_int_mask_t;
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/** @brief PDM clock frequency. */
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typedef enum
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{
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NRF_PDM_FREQ_1000K = PDM_PDMCLKCTRL_FREQ_1000K, ///< PDM_CLK = 1.000 MHz.
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NRF_PDM_FREQ_1032K = PDM_PDMCLKCTRL_FREQ_Default, ///< PDM_CLK = 1.032 MHz.
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NRF_PDM_FREQ_1067K = PDM_PDMCLKCTRL_FREQ_1067K ///< PDM_CLK = 1.067 MHz.
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} nrf_pdm_freq_t;
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/** @brief PDM operation mode. */
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typedef enum
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{
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NRF_PDM_MODE_STEREO = PDM_MODE_OPERATION_Stereo, ///< Sample and store one pair (Left + Right) of 16-bit samples per RAM word.
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NRF_PDM_MODE_MONO = PDM_MODE_OPERATION_Mono ///< Sample and store two successive Left samples (16 bit each) per RAM word.
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} nrf_pdm_mode_t;
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/** @brief PDM sampling mode. */
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typedef enum
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{
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NRF_PDM_EDGE_LEFTFALLING = PDM_MODE_EDGE_LeftFalling, ///< Left (or mono) is sampled on falling edge of PDM_CLK.
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NRF_PDM_EDGE_LEFTRISING = PDM_MODE_EDGE_LeftRising ///< Left (or mono) is sampled on rising edge of PDM_CLK.
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} nrf_pdm_edge_t;
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/**
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* @brief Function for triggering a PDM task.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] task PDM task.
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*/
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NRF_STATIC_INLINE void nrf_pdm_task_trigger(NRF_PDM_Type * p_reg, nrf_pdm_task_t task);
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/**
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* @brief Function for getting the address of a PDM task register.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] task PDM task.
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*
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* @return Address of the specified PDM task.
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*/
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NRF_STATIC_INLINE uint32_t nrf_pdm_task_address_get(NRF_PDM_Type const * p_reg,
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nrf_pdm_task_t task);
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/**
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* @brief Function for retrieving the state of the PDM event.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] event Event to be checked.
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*
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* @retval true The event has been generated.
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* @retval false The event has not been generated.
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*/
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NRF_STATIC_INLINE bool nrf_pdm_event_check(NRF_PDM_Type const * p_reg, nrf_pdm_event_t event);
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/**
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* @brief Function for clearing a PDM event.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] event PDM event.
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*/
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NRF_STATIC_INLINE void nrf_pdm_event_clear(NRF_PDM_Type * p_reg, nrf_pdm_event_t event);
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/**
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* @brief Function for getting the address of a PDM event register.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] event PDM event.
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*
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* @return Address of the specified PDM event.
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*/
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NRF_STATIC_INLINE uint32_t nrf_pdm_event_address_get(NRF_PDM_Type const * p_reg,
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nrf_pdm_event_t event);
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/**
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* @brief Function for enabling PDM interrupts.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] mask Mask of interrupts to be enabled.
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*/
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NRF_STATIC_INLINE void nrf_pdm_int_enable(NRF_PDM_Type * p_reg, uint32_t mask);
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/**
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* @brief Function for checking if the specified interrupts are enabled.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] mask Mask of interrupts to be checked.
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*
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* @return Mask of enabled interrupts.
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*/
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NRF_STATIC_INLINE uint32_t nrf_pdm_int_enable_check(NRF_PDM_Type const * p_reg, uint32_t mask);
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/**
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* @brief Function for disabling interrupts.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] mask Mask of interrupts to be disabled.
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*/
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NRF_STATIC_INLINE void nrf_pdm_int_disable(NRF_PDM_Type * p_reg, uint32_t mask);
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#if defined(DPPI_PRESENT) || defined(__NRFX_DOXYGEN__)
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/**
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* @brief Function for setting the subscribe configuration for a given
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* PDM task.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] task Task for which to set the configuration.
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* @param[in] channel Channel through which to subscribe events.
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*/
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NRF_STATIC_INLINE void nrf_pdm_subscribe_set(NRF_PDM_Type * p_reg,
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nrf_pdm_task_t task,
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uint8_t channel);
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/**
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* @brief Function for clearing the subscribe configuration for a given
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* PDM task.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] task Task for which to clear the configuration.
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*/
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NRF_STATIC_INLINE void nrf_pdm_subscribe_clear(NRF_PDM_Type * p_reg, nrf_pdm_task_t task);
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/**
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* @brief Function for setting the publish configuration for a given
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* PDM event.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] event Event for which to set the configuration.
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* @param[in] channel Channel through which to publish the event.
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*/
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NRF_STATIC_INLINE void nrf_pdm_publish_set(NRF_PDM_Type * p_reg,
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nrf_pdm_event_t event,
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uint8_t channel);
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/**
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* @brief Function for clearing the publish configuration for a given
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* PDM event.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] event Event for which to clear the configuration.
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*/
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NRF_STATIC_INLINE void nrf_pdm_publish_clear(NRF_PDM_Type * p_reg, nrf_pdm_event_t event);
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#endif // defined(DPPI_PRESENT) || defined(__NRFX_DOXYGEN__)
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/**
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* @brief Function for enabling the PDM peripheral.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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*
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* The PDM peripheral must be enabled before use.
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*/
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NRF_STATIC_INLINE void nrf_pdm_enable(NRF_PDM_Type * p_reg);
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/**
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* @brief Function for disabling the PDM peripheral.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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*/
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NRF_STATIC_INLINE void nrf_pdm_disable(NRF_PDM_Type * p_reg);
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/**
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* @brief Function for checking if the PDM peripheral is enabled.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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*
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* @retval true The PDM peripheral is enabled.
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* @retval false The PDM peripheral is not enabled.
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*/
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NRF_STATIC_INLINE bool nrf_pdm_enable_check(NRF_PDM_Type const * p_reg);
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/**
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* @brief Function for setting the PDM operation mode.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] pdm_mode PDM operation mode.
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* @param[in] pdm_edge PDM sampling mode.
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*/
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NRF_STATIC_INLINE void nrf_pdm_mode_set(NRF_PDM_Type * p_reg,
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nrf_pdm_mode_t pdm_mode,
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nrf_pdm_edge_t pdm_edge);
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/**
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* @brief Function for getting the PDM operation mode.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[out] p_pdm_mode PDM operation mode.
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* @param[out] p_pdm_edge PDM sampling mode.
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*/
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NRF_STATIC_INLINE void nrf_pdm_mode_get(NRF_PDM_Type const * p_reg,
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nrf_pdm_mode_t * p_pdm_mode,
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nrf_pdm_edge_t * p_pdm_edge);
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/**
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* @brief Function for setting the PDM clock frequency.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] pdm_freq PDM clock frequency.
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*/
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NRF_STATIC_INLINE void nrf_pdm_clock_set(NRF_PDM_Type * p_reg, nrf_pdm_freq_t pdm_freq);
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/**
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* @brief Function for getting the PDM clock frequency.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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*
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* @return PDM clock frequency.
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*/
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NRF_STATIC_INLINE nrf_pdm_freq_t nrf_pdm_clock_get(NRF_PDM_Type const * p_reg);
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/**
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* @brief Function for setting up the PDM pins.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] psel_clk CLK pin number.
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* @param[in] psel_din DIN pin number.
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*/
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NRF_STATIC_INLINE void nrf_pdm_psel_connect(NRF_PDM_Type * p_reg,
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uint32_t psel_clk,
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uint32_t psel_din);
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/**
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* @brief Function for disconnecting the PDM pins.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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*/
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NRF_STATIC_INLINE void nrf_pdm_psel_disconnect(NRF_PDM_Type * p_reg);
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/**
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* @brief Function for setting the PDM gain.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] gain_l Left channel gain.
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* @param[in] gain_r Right channel gain.
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*/
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NRF_STATIC_INLINE void nrf_pdm_gain_set(NRF_PDM_Type * p_reg,
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nrf_pdm_gain_t gain_l,
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nrf_pdm_gain_t gain_r);
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/**
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* @brief Function for getting the PDM gain.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[out] p_gain_l Left channel gain.
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* @param[out] p_gain_r Right channel gain.
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*/
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NRF_STATIC_INLINE void nrf_pdm_gain_get(NRF_PDM_Type const * p_reg,
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nrf_pdm_gain_t * p_gain_l,
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nrf_pdm_gain_t * p_gain_r);
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/**
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* @brief Function for setting the PDM sample buffer.
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*
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* The amount of allocated RAM depends on the operation mode.
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* - For stereo mode: N 32-bit words.
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* - For mono mode: Ceil(N/2) 32-bit words.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] p_buffer Pointer to the RAM address where samples are to be written with EasyDMA.
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* @param[in] num Number of samples to allocate memory for in EasyDMA mode.
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*/
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NRF_STATIC_INLINE void nrf_pdm_buffer_set(NRF_PDM_Type * p_reg, uint32_t * p_buffer, uint32_t num);
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/**
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* @brief Function for getting the current PDM sample buffer address.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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*
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* @return Pointer to the current sample buffer.
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*/
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NRF_STATIC_INLINE uint32_t * nrf_pdm_buffer_get(NRF_PDM_Type const * p_reg);
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#ifndef NRF_DECLARE_ONLY
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NRF_STATIC_INLINE void nrf_pdm_task_trigger(NRF_PDM_Type * p_reg, nrf_pdm_task_t task)
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{
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*((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)task)) = 0x1UL;
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}
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NRF_STATIC_INLINE uint32_t nrf_pdm_task_address_get(NRF_PDM_Type const * p_reg, nrf_pdm_task_t task)
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{
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return (uint32_t)((uint8_t *)p_reg + (uint32_t)task);
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}
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NRF_STATIC_INLINE bool nrf_pdm_event_check(NRF_PDM_Type const * p_reg, nrf_pdm_event_t event)
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{
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return (bool)*(volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)event);
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}
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NRF_STATIC_INLINE void nrf_pdm_event_clear(NRF_PDM_Type * p_reg, nrf_pdm_event_t event)
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{
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*((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)event)) = 0x0UL;
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#if __CORTEX_M == 0x04
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volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)p_reg + (uint32_t)event));
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(void)dummy;
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#endif
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}
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NRF_STATIC_INLINE uint32_t nrf_pdm_event_address_get(NRF_PDM_Type const * p_reg,
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nrf_pdm_event_t event)
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{
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return (uint32_t)((uint8_t *)p_reg + (uint32_t)event);
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}
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NRF_STATIC_INLINE void nrf_pdm_int_enable(NRF_PDM_Type * p_reg, uint32_t mask)
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{
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p_reg->INTENSET = mask;
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}
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NRF_STATIC_INLINE uint32_t nrf_pdm_int_enable_check(NRF_PDM_Type const * p_reg, uint32_t mask)
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{
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return p_reg->INTENSET & mask;
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}
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NRF_STATIC_INLINE void nrf_pdm_int_disable(NRF_PDM_Type * p_reg, uint32_t mask)
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{
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p_reg->INTENCLR = mask;
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}
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#if defined(DPPI_PRESENT)
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NRF_STATIC_INLINE void nrf_pdm_subscribe_set(NRF_PDM_Type * p_reg,
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nrf_pdm_task_t task,
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uint8_t channel)
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{
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*((volatile uint32_t *) ((uint8_t *) p_reg + (uint32_t) task + 0x80uL)) =
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((uint32_t)channel | PDM_SUBSCRIBE_START_EN_Msk);
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}
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NRF_STATIC_INLINE void nrf_pdm_subscribe_clear(NRF_PDM_Type * p_reg, nrf_pdm_task_t task)
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{
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*((volatile uint32_t *) ((uint8_t *) p_reg + (uint32_t) task + 0x80uL)) = 0;
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}
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NRF_STATIC_INLINE void nrf_pdm_publish_set(NRF_PDM_Type * p_reg,
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nrf_pdm_event_t event,
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uint8_t channel)
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{
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*((volatile uint32_t *) ((uint8_t *) p_reg + (uint32_t) event + 0x80uL)) =
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((uint32_t)channel | PDM_PUBLISH_STARTED_EN_Msk);
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}
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NRF_STATIC_INLINE void nrf_pdm_publish_clear(NRF_PDM_Type * p_reg, nrf_pdm_event_t event)
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{
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*((volatile uint32_t *) ((uint8_t *) p_reg + (uint32_t) event + 0x80uL)) = 0;
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}
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#endif // defined(DPPI_PRESENT)
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NRF_STATIC_INLINE void nrf_pdm_enable(NRF_PDM_Type * p_reg)
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{
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p_reg->ENABLE = (PDM_ENABLE_ENABLE_Enabled << PDM_ENABLE_ENABLE_Pos);
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}
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NRF_STATIC_INLINE void nrf_pdm_disable(NRF_PDM_Type * p_reg)
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{
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p_reg->ENABLE = (PDM_ENABLE_ENABLE_Disabled << PDM_ENABLE_ENABLE_Pos);
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}
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|
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NRF_STATIC_INLINE bool nrf_pdm_enable_check(NRF_PDM_Type const * p_reg)
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{
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return (p_reg->ENABLE == (PDM_ENABLE_ENABLE_Enabled << PDM_ENABLE_ENABLE_Pos));
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}
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|
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NRF_STATIC_INLINE void nrf_pdm_mode_set(NRF_PDM_Type * p_reg,
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nrf_pdm_mode_t pdm_mode,
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nrf_pdm_edge_t pdm_edge)
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{
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p_reg->MODE = ((pdm_mode << PDM_MODE_OPERATION_Pos) & PDM_MODE_OPERATION_Msk)
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| ((pdm_edge << PDM_MODE_EDGE_Pos) & PDM_MODE_EDGE_Msk);
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}
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|
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NRF_STATIC_INLINE void nrf_pdm_mode_get(NRF_PDM_Type const * p_reg,
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nrf_pdm_mode_t * p_pdm_mode,
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|
nrf_pdm_edge_t * p_pdm_edge)
|
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{
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uint32_t mode = p_reg->MODE;
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*p_pdm_mode = (nrf_pdm_mode_t)((mode & PDM_MODE_OPERATION_Msk ) >> PDM_MODE_OPERATION_Pos);
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*p_pdm_edge = (nrf_pdm_edge_t)((mode & PDM_MODE_EDGE_Msk ) >> PDM_MODE_EDGE_Pos);
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}
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|
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|
NRF_STATIC_INLINE void nrf_pdm_clock_set(NRF_PDM_Type * p_reg, nrf_pdm_freq_t pdm_freq)
|
|
{
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|
p_reg->PDMCLKCTRL = ((pdm_freq << PDM_PDMCLKCTRL_FREQ_Pos) & PDM_PDMCLKCTRL_FREQ_Msk);
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|
}
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|
|
|
NRF_STATIC_INLINE nrf_pdm_freq_t nrf_pdm_clock_get(NRF_PDM_Type const * p_reg)
|
|
{
|
|
return (nrf_pdm_freq_t) ((p_reg->PDMCLKCTRL << PDM_PDMCLKCTRL_FREQ_Pos) &
|
|
PDM_PDMCLKCTRL_FREQ_Msk);
|
|
}
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|
|
|
NRF_STATIC_INLINE void nrf_pdm_psel_connect(NRF_PDM_Type * p_reg,
|
|
uint32_t psel_clk,
|
|
uint32_t psel_din)
|
|
{
|
|
p_reg->PSEL.CLK = psel_clk;
|
|
p_reg->PSEL.DIN = psel_din;
|
|
}
|
|
|
|
NRF_STATIC_INLINE void nrf_pdm_psel_disconnect(NRF_PDM_Type * p_reg)
|
|
{
|
|
p_reg->PSEL.CLK = ((PDM_PSEL_CLK_CONNECT_Disconnected << PDM_PSEL_CLK_CONNECT_Pos)
|
|
& PDM_PSEL_CLK_CONNECT_Msk);
|
|
p_reg->PSEL.DIN = ((PDM_PSEL_DIN_CONNECT_Disconnected << PDM_PSEL_DIN_CONNECT_Pos)
|
|
& PDM_PSEL_DIN_CONNECT_Msk);
|
|
}
|
|
|
|
NRF_STATIC_INLINE void nrf_pdm_gain_set(NRF_PDM_Type * p_reg,
|
|
nrf_pdm_gain_t gain_l,
|
|
nrf_pdm_gain_t gain_r)
|
|
{
|
|
p_reg->GAINL = gain_l;
|
|
p_reg->GAINR = gain_r;
|
|
}
|
|
|
|
NRF_STATIC_INLINE void nrf_pdm_gain_get(NRF_PDM_Type const * p_reg,
|
|
nrf_pdm_gain_t * p_gain_l,
|
|
nrf_pdm_gain_t * p_gain_r)
|
|
{
|
|
*p_gain_l = p_reg->GAINL;
|
|
*p_gain_r = p_reg->GAINR;
|
|
}
|
|
|
|
NRF_STATIC_INLINE void nrf_pdm_buffer_set(NRF_PDM_Type * p_reg, uint32_t * p_buffer, uint32_t num)
|
|
{
|
|
p_reg->SAMPLE.PTR = (uint32_t)p_buffer;
|
|
p_reg->SAMPLE.MAXCNT = num;
|
|
}
|
|
|
|
NRF_STATIC_INLINE uint32_t * nrf_pdm_buffer_get(NRF_PDM_Type const * p_reg)
|
|
{
|
|
return (uint32_t *)p_reg->SAMPLE.PTR;
|
|
}
|
|
|
|
#endif // NRF_DECLARE_ONLY
|
|
/** @} */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // NRF_PDM_H_
|