Diff: TARGET_SDT51822B/TOOLCHAIN_IAR/nrf_pwm.h

Revision:

171:3a7713b1edbc

Parent:

169:a7c7b631e539

diff -r e95d10626187 -r 3a7713b1edbc TARGET_SDT51822B/TOOLCHAIN_IAR/nrf_pwm.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_SDT51822B/TOOLCHAIN_IAR/nrf_pwm.h	Thu Nov 08 11:45:42 2018 +0000
@@ -0,0 +1,665 @@
+/* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+/**
+ * @defgroup nrf_pwm_hal PWM HAL
+ * @{
+ * @ingroup nrf_pwm
+ *
+ * @brief @tagAPI52 Hardware access layer for managing the Pulse Width Modulation (PWM)
+ *        peripheral.
+ */
+
+#ifndef NRF_PWM_H__
+#define NRF_PWM_H__
+
+#ifdef NRF52
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "nrf.h"
+#include "nrf_assert.h"
+
+
+/**
+ * @brief This value can be provided as a parameter for the @ref nrf_pwm_pins_set
+ *        function call to specify that a given output channel shall not be
+ *        connected to a physical pin.
+ */
+#define NRF_PWM_PIN_NOT_CONNECTED   0xFFFFFFFF
+
+/**
+ * @brief Number of channels in each PWM instance.
+ */
+#define NRF_PWM_CHANNEL_COUNT   4
+
+
+/**
+ * @brief PWM tasks.
+ */
+typedef enum
+{
+    /*lint -save -e30*/
+    NRF_PWM_TASK_STOP      = offsetof(NRF_PWM_Type, TASKS_STOP),        ///< Stops PWM pulse generation on all channels at the end of the current PWM period, and stops the sequence playback.
+    NRF_PWM_TASK_SEQSTART0 = offsetof(NRF_PWM_Type, TASKS_SEQSTART[0]), ///< Starts playback of sequence 0.
+    NRF_PWM_TASK_SEQSTART1 = offsetof(NRF_PWM_Type, TASKS_SEQSTART[1]), ///< Starts playback of sequence 1.
+    NRF_PWM_TASK_NEXTSTEP  = offsetof(NRF_PWM_Type, TASKS_NEXTSTEP)     ///< Steps by one value in the current sequence if the decoder is set to @ref NRF_PWM_STEP_TRIGGERED mode.
+    /*lint -restore*/
+} nrf_pwm_task_t;
+
+/**
+ * @brief PWM events.
+ */
+typedef enum
+{
+    /*lint -save -e30*/
+    NRF_PWM_EVENT_STOPPED      = offsetof(NRF_PWM_Type, EVENTS_STOPPED),       ///< Response to STOP task, emitted when PWM pulses are no longer generated.
+    NRF_PWM_EVENT_SEQSTARTED0  = offsetof(NRF_PWM_Type, EVENTS_SEQSTARTED[0]), ///< First PWM period started on sequence 0.
+    NRF_PWM_EVENT_SEQSTARTED1  = offsetof(NRF_PWM_Type, EVENTS_SEQSTARTED[1]), ///< First PWM period started on sequence 1.
+    NRF_PWM_EVENT_SEQEND0      = offsetof(NRF_PWM_Type, EVENTS_SEQEND[0]),     ///< Emitted at the end of every sequence 0 when its last value has been read from RAM.
+    NRF_PWM_EVENT_SEQEND1      = offsetof(NRF_PWM_Type, EVENTS_SEQEND[1]),     ///< Emitted at the end of every sequence 1 when its last value has been read from RAM.
+    NRF_PWM_EVENT_PWMPERIODEND = offsetof(NRF_PWM_Type, EVENTS_PWMPERIODEND),  ///< Emitted at the end of each PWM period.
+    NRF_PWM_EVENT_LOOPSDONE    = offsetof(NRF_PWM_Type, EVENTS_LOOPSDONE)      ///< Concatenated sequences have been played the requested number of times.
+    /*lint -restore*/
+} nrf_pwm_event_t;
+
+/**
+ * @brief PWM interrupts.
+ */
+typedef enum
+{
+    NRF_PWM_INT_STOPPED_MASK      = PWM_INTENSET_STOPPED_Msk,      ///< Interrupt on STOPPED event.
+    NRF_PWM_INT_SEQSTARTED0_MASK  = PWM_INTENSET_SEQSTARTED0_Msk,  ///< Interrupt on SEQSTARTED[0] event.
+    NRF_PWM_INT_SEQSTARTED1_MASK  = PWM_INTENSET_SEQSTARTED1_Msk,  ///< Interrupt on SEQSTARTED[1] event.
+    NRF_PWM_INT_SEQEND0_MASK      = PWM_INTENSET_SEQEND0_Msk,      ///< Interrupt on SEQEND[0] event.
+    NRF_PWM_INT_SEQEND1_MASK      = PWM_INTENSET_SEQEND1_Msk,      ///< Interrupt on SEQEND[1] event.
+    NRF_PWM_INT_PWMPERIODEND_MASK = PWM_INTENSET_PWMPERIODEND_Msk, ///< Interrupt on PWMPERIODEND event.
+    NRF_PWM_INT_LOOPSDONE_MASK    = PWM_INTENSET_LOOPSDONE_Msk     ///< Interrupt on LOOPSDONE event.
+} nrf_pwm_int_mask_t;
+
+/**
+ * @brief PWM shortcuts.
+ */
+typedef enum
+{
+    NRF_PWM_SHORT_SEQEND0_STOP_MASK        = PWM_SHORTS_SEQEND0_STOP_Msk,        ///< Shortcut between SEQEND[0] event and STOP task.
+    NRF_PWM_SHORT_SEQEND1_STOP_MASK        = PWM_SHORTS_SEQEND1_STOP_Msk,        ///< Shortcut between SEQEND[1] event and STOP task.
+    NRF_PWM_SHORT_LOOPSDONE_SEQSTART0_MASK = PWM_SHORTS_LOOPSDONE_SEQSTART0_Msk, ///< Shortcut between LOOPSDONE event and SEQSTART[0] task.
+    NRF_PWM_SHORT_LOOPSDONE_SEQSTART1_MASK = PWM_SHORTS_LOOPSDONE_SEQSTART1_Msk, ///< Shortcut between LOOPSDONE event and SEQSTART[1] task.
+    NRF_PWM_SHORT_LOOPSDONE_STOP_MASK      = PWM_SHORTS_LOOPSDONE_STOP_Msk       ///< Shortcut between LOOPSDONE event and STOP task.
+} nrf_pwm_short_mask_t;
+
+/**
+ * @brief PWM modes of operation.
+ */
+typedef enum
+{
+    NRF_PWM_MODE_UP          = PWM_MODE_UPDOWN_Up,        ///< Up counter (edge-aligned PWM duty cycle).
+    NRF_PWM_MODE_UP_AND_DOWN = PWM_MODE_UPDOWN_UpAndDown, ///< Up and down counter (center-aligned PWM duty cycle).
+} nrf_pwm_mode_t;
+
+/**
+ * @brief PWM base clock frequencies.
+ */
+typedef enum
+{
+    NRF_PWM_CLK_16MHz  = PWM_PRESCALER_PRESCALER_DIV_1,  ///< 16 MHz / 1 = 16 MHz.
+    NRF_PWM_CLK_8MHz   = PWM_PRESCALER_PRESCALER_DIV_2,  ///< 16 MHz / 2 = 8 MHz.
+    NRF_PWM_CLK_4MHz   = PWM_PRESCALER_PRESCALER_DIV_4,  ///< 16 MHz / 4 = 4 MHz.
+    NRF_PWM_CLK_2MHz   = PWM_PRESCALER_PRESCALER_DIV_8,  ///< 16 MHz / 8 = 2 MHz.
+    NRF_PWM_CLK_1MHz   = PWM_PRESCALER_PRESCALER_DIV_16, ///< 16 MHz / 16 = 1 MHz.
+    NRF_PWM_CLK_500kHz = PWM_PRESCALER_PRESCALER_DIV_32, ///< 16 MHz / 32 = 500 kHz.
+    NRF_PWM_CLK_250kHz = PWM_PRESCALER_PRESCALER_DIV_64, ///< 16 MHz / 64 = 250 kHz.
+    NRF_PWM_CLK_125kHz = PWM_PRESCALER_PRESCALER_DIV_128 ///< 16 MHz / 128 = 125 kHz.
+} nrf_pwm_clk_t;
+
+/**
+ * @brief PWM decoder load modes.
+ *
+ * The selected mode determines how the sequence data is read from RAM and
+ * spread to the compare registers.
+ */
+typedef enum
+{
+    NRF_PWM_LOAD_COMMON     = PWM_DECODER_LOAD_Common,     ///< 1st half word (16-bit) used in all PWM channels (0-3).
+    NRF_PWM_LOAD_GROUPED    = PWM_DECODER_LOAD_Grouped,    ///< 1st half word (16-bit) used in channels 0 and 1; 2nd word in channels 2 and 3.
+    NRF_PWM_LOAD_INDIVIDUAL = PWM_DECODER_LOAD_Individual, ///< 1st half word (16-bit) used in channel 0; 2nd in channel 1; 3rd in channel 2; 4th in channel 3.
+    NRF_PWM_LOAD_WAVE_FORM  = PWM_DECODER_LOAD_WaveForm    ///< 1st half word (16-bit) used in channel 0; 2nd in channel 1; ... ; 4th as the top value for the pulse generator counter.
+} nrf_pwm_dec_load_t;
+
+/**
+ * @brief PWM decoder next step modes.
+ *
+ * The selected mode determines when the next value from the active sequence
+ * is loaded.
+ */
+typedef enum
+{
+    NRF_PWM_STEP_AUTO      = PWM_DECODER_MODE_RefreshCount, ///< Automatically after the current value is played and repeated the requested number of times.
+    NRF_PWM_STEP_TRIGGERED = PWM_DECODER_MODE_NextStep      ///< When the @ref NRF_PWM_TASK_NEXTSTEP task is triggered.
+} nrf_pwm_dec_step_t;
+
+
+/**
+ * @brief Type used for defining duty cycle values for a sequence
+ *        loaded in @ref NRF_PWM_LOAD_COMMON mode.
+ */
+typedef uint16_t nrf_pwm_values_common_t;
+
+/**
+ * @brief Structure for defining duty cycle values for a sequence
+ *        loaded in @ref NRF_PWM_LOAD_GROUPED mode.
+ */
+typedef struct {
+    uint16_t group_0; ///< Duty cycle value for group 0 (channels 0 and 1).
+    uint16_t group_1; ///< Duty cycle value for group 1 (channels 2 and 3).
+} nrf_pwm_values_grouped_t;
+
+/**
+ * @brief Structure for defining duty cycle values for a sequence
+ *        loaded in @ref NRF_PWM_LOAD_INDIVIDUAL mode.
+ */
+typedef struct
+{
+    uint16_t channel_0; ///< Duty cycle value for channel 0.
+    uint16_t channel_1; ///< Duty cycle value for channel 1.
+    uint16_t channel_2; ///< Duty cycle value for channel 2.
+    uint16_t channel_3; ///< Duty cycle value for channel 3.
+} nrf_pwm_values_individual_t;
+
+/**
+ * @brief Structure for defining duty cycle values for a sequence
+ *        loaded in @ref NRF_PWM_LOAD_WAVE_FORM mode.
+ */
+typedef struct {
+    uint16_t channel_0;   ///< Duty cycle value for channel 0.
+    uint16_t channel_1;   ///< Duty cycle value for channel 1.
+    uint16_t channel_2;   ///< Duty cycle value for channel 2.
+    uint16_t counter_top; ///< Top value for the pulse generator counter.
+} nrf_pwm_values_wave_form_t;
+
+/**
+ * @brief Union grouping pointers to arrays of duty cycle values applicable to
+ *        various loading modes.
+ */
+typedef union {
+    nrf_pwm_values_common_t     const * p_common;     ///< Pointer to be used in @ref NRF_PWM_LOAD_COMMON mode.
+    nrf_pwm_values_grouped_t    const * p_grouped;    ///< Pointer to be used in @ref NRF_PWM_LOAD_GROUPED mode.
+    nrf_pwm_values_individual_t const * p_individual; ///< Pointer to be used in @ref NRF_PWM_LOAD_INDIVIDUAL mode.
+    nrf_pwm_values_wave_form_t  const * p_wave_form;  ///< Pointer to be used in @ref NRF_PWM_LOAD_WAVE_FORM mode.
+    uint16_t                    const * p_raw;        ///< Pointer providing raw access to the values.
+} nrf_pwm_values_t;
+
+/**
+ * @brief Structure for defining a sequence of PWM duty cycles.
+ *
+ * When the sequence is set (by a call to @ref nrf_pwm_sequence_set), the
+ * provided duty cycle values are not copied. The @p values pointer is stored
+ * in the peripheral's internal register, and the values are loaded from RAM
+ * during the sequence playback. Therefore, you must ensure that the values
+ * do not change before and during the sequence playback (for example,
+ * the values cannot be placed in a local variable that is allocated on stack).
+ * If the sequence is played in a loop and the values should be updated
+ * before the next iteration, it is safe to modify them when the corresponding
+ * event signaling the end of sequence occurs (@ref NRF_PWM_EVENT_SEQEND0
+ * or @ref NRF_PWM_EVENT_SEQEND1, respectively).
+ *
+ * @note The @p repeats and @p end_delay values (which are written to the
+ *       SEQ[n].REFRESH and SEQ[n].ENDDELAY registers in the peripheral,
+ *       respectively) are ignored at the end of a complex sequence
+ *       playback, indicated by the LOOPSDONE event.
+ *       See the @linkProductSpecification52 for more information.
+ */
+typedef struct
+{
+    nrf_pwm_values_t values; ///< Pointer to an array with duty cycle values. This array must be in Data RAM.
+                             /**< This field is defined as an union of pointers
+                              *   to provide a convenient way to define duty
+                              *   cycle values in various loading modes
+                              *   (see @ref nrf_pwm_dec_load_t).
+                              *   In each value, the most significant bit (15)
+                              *   determines the polarity of the output and the
+                              *   others (14-0) compose the 15-bit value to be
+                              *   compared with the pulse generator counter. */
+    uint16_t length;    ///< Number of 16-bit values in the array pointed by @p values.
+    uint32_t repeats;   ///< Number of times that each duty cycle should be repeated (after being played once). Ignored in @ref NRF_PWM_STEP_TRIGGERED mode.
+    uint32_t end_delay; ///< Additional time (in PWM periods) that the last duty cycle is to be kept after the sequence is played. Ignored in @ref NRF_PWM_STEP_TRIGGERED mode.
+} nrf_pwm_sequence_t;
+
+/**
+ * @brief Helper macro for calculating the number of 16-bit values in specified
+ *        array of duty cycle values.
+ */
+#define NRF_PWM_VALUES_LENGTH(array)  (sizeof(array)/sizeof(uint16_t))
+
+
+/**
+ * @brief Function for activating a specific PWM task.
+ *
+ * @param[in] p_pwm PWM instance.
+ * @param[in] task  Task to activate.
+ */
+__STATIC_INLINE void nrf_pwm_task_trigger(NRF_PWM_Type * p_pwm,
+                                          nrf_pwm_task_t task);
+
+/**
+ * @brief Function for getting the address of a specific PWM task register.
+ *
+ * @param[in] p_pwm PWM instance.
+ * @param[in] task  Requested task.
+ *
+ * @return Address of the specified task register.
+ */
+__STATIC_INLINE uint32_t nrf_pwm_task_address_get(NRF_PWM_Type const * p_pwm,
+                                                  nrf_pwm_task_t task);
+
+/**
+ * @brief Function for clearing a specific PWM event.
+ *
+ * @param[in] p_pwm PWM instance.
+ * @param[in] event Event to clear.
+ */
+__STATIC_INLINE void nrf_pwm_event_clear(NRF_PWM_Type * p_pwm,
+                                         nrf_pwm_event_t event);
+
+/**
+ * @brief Function for checking the state of a specific PWM event.
+ *
+ * @param[in] p_pwm PWM instance.
+ * @param[in] event Event to check.
+ *
+ * @retval true  If the event is set.
+ * @retval false If the event is not set.
+ */
+__STATIC_INLINE bool nrf_pwm_event_check(NRF_PWM_Type const * p_pwm,
+                                         nrf_pwm_event_t event);
+
+/**
+ * @brief Function for getting the address of a specific PWM event register.
+ *
+ * @param[in] p_pwm PWM instance.
+ * @param[in] event Requested event.
+ *
+ * @return Address of the specified event register.
+ */
+__STATIC_INLINE uint32_t nrf_pwm_event_address_get(NRF_PWM_Type const * p_pwm,
+                                                   nrf_pwm_event_t event);
+
+/**
+ * @brief Function for enabling specified shortcuts.
+ *
+ * @param[in] p_pwm           PWM instance.
+ * @param[in] pwm_shorts_mask Shortcuts to enable.
+ */
+__STATIC_INLINE void nrf_pwm_shorts_enable(NRF_PWM_Type * p_pwm,
+                                           uint32_t pwm_shorts_mask);
+
+/**
+ * @brief Function for disabling specified shortcuts.
+ *
+ * @param[in] p_pwm           PWM instance.
+ * @param[in] pwm_shorts_mask Shortcuts to disable.
+ */
+__STATIC_INLINE void nrf_pwm_shorts_disable(NRF_PWM_Type * p_pwm,
+                                            uint32_t pwm_shorts_mask);
+
+/**
+ * @brief Function for setting the configuration of PWM shortcuts.
+ *
+ * @param[in] p_pwm           PWM instance.
+ * @param[in] pwm_shorts_mask Shortcuts configuration to set.
+ */
+__STATIC_INLINE void nrf_pwm_shorts_set(NRF_PWM_Type * p_pwm,
+                                        uint32_t pwm_shorts_mask);
+
+/**
+ * @brief Function for enabling specified interrupts.
+ *
+ * @param[in] p_pwm        PWM instance.
+ * @param[in] pwm_int_mask Interrupts to enable.
+ */
+__STATIC_INLINE void nrf_pwm_int_enable(NRF_PWM_Type * p_pwm,
+                                        uint32_t pwm_int_mask);
+
+/**
+ * @brief Function for disabling specified interrupts.
+ *
+ * @param[in] p_pwm        PWM instance.
+ * @param[in] pwm_int_mask Interrupts to disable.
+ */
+__STATIC_INLINE void nrf_pwm_int_disable(NRF_PWM_Type * p_pwm,
+                                         uint32_t pwm_int_mask);
+
+/**
+ * @brief Function for setting the configuration of PWM interrupts.
+ *
+ * @param[in] p_pwm        PWM instance.
+ * @param[in] pwm_int_mask Interrupts configuration to set.
+ */
+__STATIC_INLINE void nrf_pwm_int_set(NRF_PWM_Type * p_pwm,
+                                     uint32_t pwm_int_mask);
+
+/**
+ * @brief Function for retrieving the state of a given interrupt.
+ *
+ * @param[in] p_pwm   PWM instance.
+ * @param[in] pwm_int Interrupt to check.
+ *
+ * @retval true  If the interrupt is enabled.
+ * @retval false If the interrupt is not enabled.
+ */
+__STATIC_INLINE bool nrf_pwm_int_enable_check(NRF_PWM_Type const * p_pwm,
+                                              nrf_pwm_int_mask_t pwm_int);
+
+/**
+ * @brief Function for enabling the PWM peripheral.
+ *
+ * @param[in] p_pwm PWM instance.
+ */
+__STATIC_INLINE void nrf_pwm_enable(NRF_PWM_Type * p_pwm);
+
+/**
+ * @brief Function for disabling the PWM peripheral.
+ *
+ * @param[in] p_pwm PWM instance.
+ */
+__STATIC_INLINE void nrf_pwm_disable(NRF_PWM_Type * p_pwm);
+
+/**
+ * @brief Function for assigning pins to PWM output channels.
+ *
+ * Usage of all PWM output channels is optional. If a given channel is not
+ * needed, pass the @ref NRF_PWM_PIN_NOT_CONNECTED value instead of its pin
+ * number.
+ *
+ * @param[in] p_pwm    PWM instance.
+ * @param[in] out_pins Array with pin numbers for individual PWM output channels.
+ */
+__STATIC_INLINE void nrf_pwm_pins_set(NRF_PWM_Type * p_pwm,
+                                      uint32_t out_pins[NRF_PWM_CHANNEL_COUNT]);
+
+/**
+ * @brief Function for configuring the PWM peripheral.
+ *
+ * @param[in] p_pwm      PWM instance.
+ * @param[in] base_clock Base clock frequency.
+ * @param[in] mode       Operating mode of the pulse generator counter.
+ * @param[in] top_value  Value up to which the pulse generator counter counts.
+ */
+__STATIC_INLINE void nrf_pwm_configure(NRF_PWM_Type * p_pwm,
+                                       nrf_pwm_clk_t  base_clock,
+                                       nrf_pwm_mode_t mode,
+                                       uint16_t       top_value);
+
+/**
+ * @brief Function for defining a sequence of PWM duty cycles.
+ *
+ * @param[in] p_pwm  PWM instance.
+ * @param[in] seq_id Identifier of the sequence (0 or 1).
+ * @param[in] p_seq  Pointer to the sequence definition.
+ */
+__STATIC_INLINE void nrf_pwm_sequence_set(NRF_PWM_Type * p_pwm,
+                                          uint8_t                    seq_id,
+                                          nrf_pwm_sequence_t const * p_seq);
+
+/**
+ * @brief Function for modifying the pointer to the duty cycle values
+ *        in the specified sequence.
+ *
+ * @param[in] p_pwm    PWM instance.
+ * @param[in] seq_id   Identifier of the sequence (0 or 1).
+ * @param[in] p_values Pointer to an array with duty cycle values.
+ */
+__STATIC_INLINE void nrf_pwm_seq_ptr_set(NRF_PWM_Type * p_pwm,
+                                         uint8_t          seq_id,
+                                         uint16_t const * p_values);
+
+/**
+ * @brief Function for modifying the total number of duty cycle values
+ *        in the specified sequence.
+ *
+ * @param[in] p_pwm  PWM instance.
+ * @param[in] seq_id Identifier of the sequence (0 or 1).
+ * @param[in] length Number of duty cycle values.
+ */
+__STATIC_INLINE void nrf_pwm_seq_cnt_set(NRF_PWM_Type * p_pwm,
+                                         uint8_t  seq_id,
+                                         uint16_t length);
+
+/**
+ * @brief Function for modifying the additional number of PWM periods spent
+ *        on each duty cycle value in the specified sequence.
+ *
+ * @param[in] p_pwm   PWM instance.
+ * @param[in] seq_id  Identifier of the sequence (0 or 1).
+ * @param[in] refresh Number of additional PWM periods for each duty cycle value.
+ */
+__STATIC_INLINE void nrf_pwm_seq_refresh_set(NRF_PWM_Type * p_pwm,
+                                             uint8_t  seq_id,
+                                             uint32_t refresh);
+
+/**
+ * @brief Function for modifying the additional time added after the sequence
+ *        is played.
+ *
+ * @param[in] p_pwm     PWM instance.
+ * @param[in] seq_id    Identifier of the sequence (0 or 1).
+ * @param[in] end_delay Number of PWM periods added at the end of the sequence.
+ */
+__STATIC_INLINE void nrf_pwm_seq_end_delay_set(NRF_PWM_Type * p_pwm,
+                                               uint8_t  seq_id,
+                                               uint32_t end_delay);
+
+/**
+ * @brief Function for setting the mode of loading sequence data from RAM
+ *        and advancing the sequence.
+ *
+ * @param[in] p_pwm    PWM instance.
+ * @param[in] dec_load Mode of loading sequence data from RAM.
+ * @param[in] dec_step Mode of advancing the active sequence.
+ */
+__STATIC_INLINE void nrf_pwm_decoder_set(NRF_PWM_Type * p_pwm,
+                                         nrf_pwm_dec_load_t dec_load,
+                                         nrf_pwm_dec_step_t dec_step);
+
+/**
+ * @brief Function for setting the number of times the sequence playback
+ *        should be performed.
+ *
+ * This function applies to two-sequence playback (concatenated sequence 0 and 1).
+ * A single sequence can be played back only once.
+ *
+ * @param[in] p_pwm      PWM instance.
+ * @param[in] loop_count Number of times to perform the sequence playback.
+ */
+__STATIC_INLINE void nrf_pwm_loop_set(NRF_PWM_Type * p_pwm,
+                                      uint16_t loop_count);
+
+
+#ifndef SUPPRESS_INLINE_IMPLEMENTATION
+
+__STATIC_INLINE void nrf_pwm_task_trigger(NRF_PWM_Type * p_pwm,
+                                          nrf_pwm_task_t task)
+{
+    *((volatile uint32_t *)((uint8_t *)p_pwm + (uint32_t)task)) = 0x1UL;
+}
+
+__STATIC_INLINE uint32_t nrf_pwm_task_address_get(NRF_PWM_Type const * p_pwm,
+                                                  nrf_pwm_task_t task)
+{
+    return ((uint32_t)p_pwm + (uint32_t)task);
+}
+
+__STATIC_INLINE void nrf_pwm_event_clear(NRF_PWM_Type * p_pwm,
+                                         nrf_pwm_event_t event)
+{
+    *((volatile uint32_t *)((uint8_t *)p_pwm + (uint32_t)event)) = 0x0UL;
+}
+
+__STATIC_INLINE bool nrf_pwm_event_check(NRF_PWM_Type const * p_pwm,
+                                         nrf_pwm_event_t event)
+{
+    return (bool)*(volatile uint32_t *)((uint8_t *)p_pwm + (uint32_t)event);
+}
+
+__STATIC_INLINE uint32_t nrf_pwm_event_address_get(NRF_PWM_Type const * p_pwm,
+                                                   nrf_pwm_event_t event)
+{
+    return ((uint32_t)p_pwm + (uint32_t)event);
+}
+
+__STATIC_INLINE void nrf_pwm_shorts_enable(NRF_PWM_Type * p_pwm,
+                                           uint32_t pwm_shorts_mask)
+{
+    p_pwm->SHORTS |= pwm_shorts_mask;
+}
+
+__STATIC_INLINE void nrf_pwm_shorts_disable(NRF_PWM_Type * p_pwm,
+                                            uint32_t pwm_shorts_mask)
+{
+    p_pwm->SHORTS &= ~(pwm_shorts_mask);
+}
+
+__STATIC_INLINE void nrf_pwm_shorts_set(NRF_PWM_Type * p_pwm,
+                                        uint32_t pwm_shorts_mask)
+{
+    p_pwm->SHORTS = pwm_shorts_mask;
+}
+
+__STATIC_INLINE void nrf_pwm_int_enable(NRF_PWM_Type * p_pwm,
+                                        uint32_t pwm_int_mask)
+{
+    p_pwm->INTENSET = pwm_int_mask;
+}
+
+__STATIC_INLINE void nrf_pwm_int_disable(NRF_PWM_Type * p_pwm,
+                                         uint32_t pwm_int_mask)
+{
+    p_pwm->INTENCLR = pwm_int_mask;
+}
+
+__STATIC_INLINE void nrf_pwm_int_set(NRF_PWM_Type * p_pwm,
+                                     uint32_t pwm_int_mask)
+{
+    p_pwm->INTEN = pwm_int_mask;
+}
+
+__STATIC_INLINE bool nrf_pwm_int_enable_check(NRF_PWM_Type const * p_pwm,
+                                              nrf_pwm_int_mask_t pwm_int)
+{
+    return (bool)(p_pwm->INTENSET & pwm_int);
+}
+
+__STATIC_INLINE void nrf_pwm_enable(NRF_PWM_Type * p_pwm)
+{
+    p_pwm->ENABLE = (PWM_ENABLE_ENABLE_Enabled << PWM_ENABLE_ENABLE_Pos);
+}
+
+__STATIC_INLINE void nrf_pwm_disable(NRF_PWM_Type * p_pwm)
+{
+    p_pwm->ENABLE = (PWM_ENABLE_ENABLE_Disabled << PWM_ENABLE_ENABLE_Pos);
+}
+
+__STATIC_INLINE void nrf_pwm_pins_set(NRF_PWM_Type * p_pwm,
+                                      uint32_t out_pins[NRF_PWM_CHANNEL_COUNT])
+{
+    uint8_t i;
+    for (i = 0; i < NRF_PWM_CHANNEL_COUNT; ++i)
+    {
+        p_pwm->PSEL.OUT[i] = out_pins[i];
+    }
+}
+
+__STATIC_INLINE void nrf_pwm_configure(NRF_PWM_Type * p_pwm,
+                                       nrf_pwm_clk_t  base_clock,
+                                       nrf_pwm_mode_t mode,
+                                       uint16_t       top_value)
+{
+    ASSERT(top_value <= PWM_COUNTERTOP_COUNTERTOP_Msk);
+
+    p_pwm->PRESCALER  = base_clock;
+    p_pwm->MODE       = mode;
+    p_pwm->COUNTERTOP = top_value;
+}
+
+__STATIC_INLINE void nrf_pwm_sequence_set(NRF_PWM_Type * p_pwm,
+                                          uint8_t                    seq_id,
+                                          nrf_pwm_sequence_t const * p_seq)
+{
+    ASSERT(p_seq != NULL);
+
+    nrf_pwm_seq_ptr_set(      p_pwm, seq_id, p_seq->values.p_raw);
+    nrf_pwm_seq_cnt_set(      p_pwm, seq_id, p_seq->length);
+    nrf_pwm_seq_refresh_set(  p_pwm, seq_id, p_seq->repeats);
+    nrf_pwm_seq_end_delay_set(p_pwm, seq_id, p_seq->end_delay);
+}
+
+__STATIC_INLINE void nrf_pwm_seq_ptr_set(NRF_PWM_Type * p_pwm,
+                                         uint8_t          seq_id,
+                                         uint16_t const * p_values)
+{
+    ASSERT(seq_id <= 1);
+    ASSERT(p_values != NULL);
+    p_pwm->SEQ[seq_id].PTR = (uint32_t)p_values;
+}
+
+__STATIC_INLINE void nrf_pwm_seq_cnt_set(NRF_PWM_Type * p_pwm,
+                                         uint8_t  seq_id,
+                                         uint16_t length)
+{
+    ASSERT(seq_id <= 1);
+    ASSERT(length != 0);
+    ASSERT(length <= PWM_SEQ_CNT_CNT_Msk);
+    p_pwm->SEQ[seq_id].CNT = length;
+}
+
+__STATIC_INLINE void nrf_pwm_seq_refresh_set(NRF_PWM_Type * p_pwm,
+                                             uint8_t  seq_id,
+                                             uint32_t refresh)
+{
+    ASSERT(seq_id <= 1);
+    ASSERT(refresh <= PWM_SEQ_REFRESH_CNT_Msk);
+    p_pwm->SEQ[seq_id].REFRESH  = refresh;
+}
+
+__STATIC_INLINE void nrf_pwm_seq_end_delay_set(NRF_PWM_Type * p_pwm,
+                                               uint8_t  seq_id,
+                                               uint32_t end_delay)
+{
+    ASSERT(seq_id <= 1);
+    ASSERT(end_delay <= PWM_SEQ_ENDDELAY_CNT_Msk);
+    p_pwm->SEQ[seq_id].ENDDELAY = end_delay;
+}
+
+__STATIC_INLINE void nrf_pwm_decoder_set(NRF_PWM_Type * p_pwm,
+                                         nrf_pwm_dec_load_t dec_load,
+                                         nrf_pwm_dec_step_t dec_step)
+{
+    p_pwm->DECODER = ((uint32_t)dec_load << PWM_DECODER_LOAD_Pos) |
+                     ((uint32_t)dec_step << PWM_DECODER_MODE_Pos);
+}
+
+__STATIC_INLINE void nrf_pwm_loop_set(NRF_PWM_Type * p_pwm,
+                                      uint16_t loop_count)
+{
+    p_pwm->LOOP = loop_count;
+}
+
+#endif // SUPPRESS_INLINE_IMPLEMENTATION
+
+#endif // NRF52
+
+#endif // NRF_PWM_H__
+
+/** @} */