212 lines
5.5 KiB
C
212 lines
5.5 KiB
C
/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
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*
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* The information contained herein is property of Nordic Semiconductor ASA.
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* Terms and conditions of usage are described in detail in NORDIC
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* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
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*
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* Licensees are granted free, non-transferable use of the information. NO
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* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
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* the file.
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*
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*/
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/**
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* @file
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* @brief RNG HAL API.
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*/
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#ifndef NRF_RNG_H__
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#define NRF_RNG_H__
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/**
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* @defgroup nrf_rng_hal RNG HAL
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* @{
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* @ingroup nrf_rng
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* @brief Hardware access layer for managing the random number generator (RNG).
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include "nrf.h"
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#define NRF_RNG_TASK_SET (1UL)
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#define NRF_RNG_EVENT_CLEAR (0UL)
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/**
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* @enum nrf_rng_task_t
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* @brief RNG tasks.
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*/
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typedef enum /*lint -save -e30 -esym(628,__INTADDR__) */
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{
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NRF_RNG_TASK_START = offsetof(NRF_RNG_Type, TASKS_START), /**< Start the random number generator. */
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NRF_RNG_TASK_STOP = offsetof(NRF_RNG_Type, TASKS_STOP) /**< Stop the random number generator. */
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} nrf_rng_task_t; /*lint -restore */
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/**
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* @enum nrf_rng_event_t
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* @brief RNG events.
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*/
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typedef enum /*lint -save -e30 -esym(628,__INTADDR__) */
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{
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NRF_RNG_EVENT_VALRDY = offsetof(NRF_RNG_Type, EVENTS_VALRDY) /**< New random number generated event. */
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} nrf_rng_event_t; /*lint -restore */
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/**
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* @enum nrf_rng_int_mask_t
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* @brief RNG interrupts.
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*/
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typedef enum
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{
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NRF_RNG_INT_VALRDY_MASK = RNG_INTENSET_VALRDY_Msk /**< Mask for enabling or disabling an interrupt on VALRDY event. */
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} nrf_rng_int_mask_t;
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/**
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* @enum nrf_rng_short_mask_t
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* @brief Types of RNG shortcuts.
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*/
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typedef enum
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{
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NRF_RNG_SHORT_VALRDY_STOP_MASK = RNG_SHORTS_VALRDY_STOP_Msk /**< Mask for setting shortcut between EVENT_VALRDY and TASK_STOP. */
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} nrf_rng_short_mask_t;
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/**
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* @brief Function for enabling interrupts.
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*
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* @param[in] rng_int_mask Mask of interrupts.
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*/
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__STATIC_INLINE void nrf_rng_int_enable(uint32_t rng_int_mask)
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{
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NRF_RNG->INTENSET = rng_int_mask;
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}
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/**
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* @brief Function for disabling interrupts.
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*
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* @param[in] rng_int_mask Mask of interrupts.
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*/
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__STATIC_INLINE void nrf_rng_int_disable(uint32_t rng_int_mask)
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{
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NRF_RNG->INTENCLR = rng_int_mask;
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}
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/**
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* @brief Function for getting the state of a specific interrupt.
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*
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* @param[in] rng_int_mask Interrupt.
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*
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* @retval true If the interrupt is not enabled.
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* @retval false If the interrupt is enabled.
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*/
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__STATIC_INLINE bool nrf_rng_int_get(nrf_rng_int_mask_t rng_int_mask)
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{
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return (bool)(NRF_RNG->INTENCLR & rng_int_mask);
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}
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/**
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* @brief Function for getting the address of a specific task.
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*
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* This function can be used by the PPI module.
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*
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* @param[in] rng_task Task.
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*/
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__STATIC_INLINE uint32_t * nrf_rng_task_address_get(nrf_rng_task_t rng_task)
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{
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return (uint32_t *)((uint8_t *)NRF_RNG + rng_task);
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}
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/**
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* @brief Function for setting a specific task.
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*
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* @param[in] rng_task Task.
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*/
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__STATIC_INLINE void nrf_rng_task_trigger(nrf_rng_task_t rng_task)
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{
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*((volatile uint32_t *)((uint8_t *)NRF_RNG + rng_task)) = NRF_RNG_TASK_SET;
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}
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/**
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* @brief Function for getting address of a specific event.
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*
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* This function can be used by the PPI module.
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*
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* @param[in] rng_event Event.
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*/
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__STATIC_INLINE uint32_t * nrf_rng_event_address_get(nrf_rng_event_t rng_event)
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{
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return (uint32_t *)((uint8_t *)NRF_RNG + rng_event);
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}
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/**
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* @brief Function for clearing a specific event.
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*
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* @param[in] rng_event Event.
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*/
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__STATIC_INLINE void nrf_rng_event_clear(nrf_rng_event_t rng_event)
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{
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*((volatile uint32_t *)((uint8_t *)NRF_RNG + rng_event)) = NRF_RNG_EVENT_CLEAR;
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}
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/**
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* @brief Function for getting the state of a specific event.
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*
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* @param[in] rng_event Event.
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*
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* @retval true If the event is not set.
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* @retval false If the event is set.
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*/
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__STATIC_INLINE bool nrf_rng_event_get(nrf_rng_event_t rng_event)
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{
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return (bool)*((volatile uint32_t *)((uint8_t *)NRF_RNG + rng_event));
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}
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/**
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* @brief Function for setting shortcuts.
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*
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* @param[in] rng_short_mask Mask of shortcuts.
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*
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*/
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__STATIC_INLINE void nrf_rng_shorts_enable(uint32_t rng_short_mask)
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{
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NRF_RNG->SHORTS |= rng_short_mask;
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}
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/**
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* @brief Function for clearing shortcuts.
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*
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* @param[in] rng_short_mask Mask of shortcuts.
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*
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*/
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__STATIC_INLINE void nrf_rng_shorts_disable(uint32_t rng_short_mask)
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{
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NRF_RNG->SHORTS &= ~rng_short_mask;
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}
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/**
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* @brief Function for getting the previously generated random value.
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*
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* @return Previously generated random value.
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*/
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__STATIC_INLINE uint8_t nrf_rng_random_value_get(void)
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{
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return (uint8_t)(NRF_RNG->VALUE & RNG_VALUE_VALUE_Msk);
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}
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/**
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* @brief Function for enabling digital error correction.
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*/
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__STATIC_INLINE void nrf_rng_error_correction_enable(void)
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{
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NRF_RNG->CONFIG |= RNG_CONFIG_DERCEN_Msk;
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}
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/**
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* @brief Function for disabling digital error correction.
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*/
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__STATIC_INLINE void nrf_rng_error_correction_disable(void)
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{
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NRF_RNG->CONFIG &= ~RNG_CONFIG_DERCEN_Msk;
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}
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/**
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*@}
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**/
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#endif /* NRF_RNG_H__ */
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