simmel-bootloader/lib/sdk/components/drivers_nrf/hal/nrf_rng.h

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/**
* Copyright (c) 2014 - 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.
*
*/
/**
* @file
* @brief RNG HAL API.
*/
#ifndef NRF_RNG_H__
#define NRF_RNG_H__
/**
* @defgroup nrf_rng_hal RNG HAL
* @{
* @ingroup nrf_rng
* @brief Hardware access layer for managing the random number generator (RNG).
*/
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include "nrf.h"
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#ifdef __cplusplus
extern "C" {
#endif
#define NRF_RNG_TASK_SET (1UL)
#define NRF_RNG_EVENT_CLEAR (0UL)
/**
* @enum nrf_rng_task_t
* @brief RNG tasks.
*/
typedef enum /*lint -save -e30 -esym(628,__INTADDR__) */
{
NRF_RNG_TASK_START = offsetof(NRF_RNG_Type, TASKS_START), /**< Start the random number generator. */
NRF_RNG_TASK_STOP = offsetof(NRF_RNG_Type, TASKS_STOP) /**< Stop the random number generator. */
} nrf_rng_task_t; /*lint -restore */
/**
* @enum nrf_rng_event_t
* @brief RNG events.
*/
typedef enum /*lint -save -e30 -esym(628,__INTADDR__) */
{
NRF_RNG_EVENT_VALRDY = offsetof(NRF_RNG_Type, EVENTS_VALRDY) /**< New random number generated event. */
} nrf_rng_event_t; /*lint -restore */
/**
* @enum nrf_rng_int_mask_t
* @brief RNG interrupts.
*/
typedef enum
{
NRF_RNG_INT_VALRDY_MASK = RNG_INTENSET_VALRDY_Msk /**< Mask for enabling or disabling an interrupt on VALRDY event. */
} nrf_rng_int_mask_t;
/**
* @enum nrf_rng_short_mask_t
* @brief Types of RNG shortcuts.
*/
typedef enum
{
NRF_RNG_SHORT_VALRDY_STOP_MASK = RNG_SHORTS_VALRDY_STOP_Msk /**< Mask for setting shortcut between EVENT_VALRDY and TASK_STOP. */
} nrf_rng_short_mask_t;
/**
* @brief Function for enabling interrupts.
*
* @param[in] rng_int_mask Mask of interrupts.
*/
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__STATIC_INLINE void nrf_rng_int_enable(uint32_t rng_int_mask);
/**
* @brief Function for disabling interrupts.
*
* @param[in] rng_int_mask Mask of interrupts.
*/
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__STATIC_INLINE void nrf_rng_int_disable(uint32_t rng_int_mask);
/**
* @brief Function for getting the state of a specific interrupt.
*
* @param[in] rng_int_mask Interrupt.
*
* @retval true If the interrupt is not enabled.
* @retval false If the interrupt is enabled.
*/
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__STATIC_INLINE bool nrf_rng_int_get(nrf_rng_int_mask_t rng_int_mask);
/**
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* @brief Function for getting the address of a specific task.
*
* This function can be used by the PPI module.
*
* @param[in] rng_task Task.
*/
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__STATIC_INLINE uint32_t * nrf_rng_task_address_get(nrf_rng_task_t rng_task);
/**
* @brief Function for setting a specific task.
*
* @param[in] rng_task Task.
*/
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__STATIC_INLINE void nrf_rng_task_trigger(nrf_rng_task_t rng_task);
/**
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* @brief Function for getting address of a specific event.
*
* This function can be used by the PPI module.
*
* @param[in] rng_event Event.
*/
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__STATIC_INLINE uint32_t * nrf_rng_event_address_get(nrf_rng_event_t rng_event);
/**
* @brief Function for clearing a specific event.
*
* @param[in] rng_event Event.
*/
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__STATIC_INLINE void nrf_rng_event_clear(nrf_rng_event_t rng_event);
/**
* @brief Function for getting the state of a specific event.
*
* @param[in] rng_event Event.
*
* @retval true If the event is not set.
* @retval false If the event is set.
*/
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__STATIC_INLINE bool nrf_rng_event_get(nrf_rng_event_t rng_event);
/**
* @brief Function for setting shortcuts.
*
* @param[in] rng_short_mask Mask of shortcuts.
*
*/
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__STATIC_INLINE void nrf_rng_shorts_enable(uint32_t rng_short_mask);
/**
* @brief Function for clearing shortcuts.
*
* @param[in] rng_short_mask Mask of shortcuts.
*
*/
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__STATIC_INLINE void nrf_rng_shorts_disable(uint32_t rng_short_mask);
/**
* @brief Function for getting the previously generated random value.
*
* @return Previously generated random value.
*/
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__STATIC_INLINE uint8_t nrf_rng_random_value_get(void);
/**
* @brief Function for enabling digital error correction.
*/
__STATIC_INLINE void nrf_rng_error_correction_enable(void);
/**
* @brief Function for disabling digital error correction.
*/
__STATIC_INLINE void nrf_rng_error_correction_disable(void);
/**
*@}
**/
#ifndef SUPPRESS_INLINE_IMPLEMENTATION
__STATIC_INLINE void nrf_rng_int_enable(uint32_t rng_int_mask)
{
NRF_RNG->INTENSET = rng_int_mask;
}
__STATIC_INLINE void nrf_rng_int_disable(uint32_t rng_int_mask)
{
NRF_RNG->INTENCLR = rng_int_mask;
}
__STATIC_INLINE bool nrf_rng_int_get(nrf_rng_int_mask_t rng_int_mask)
{
return (bool)(NRF_RNG->INTENCLR & rng_int_mask);
}
__STATIC_INLINE uint32_t * nrf_rng_task_address_get(nrf_rng_task_t rng_task)
{
return (uint32_t *)((uint8_t *)NRF_RNG + rng_task);
}
__STATIC_INLINE void nrf_rng_task_trigger(nrf_rng_task_t rng_task)
{
*((volatile uint32_t *)((uint8_t *)NRF_RNG + rng_task)) = NRF_RNG_TASK_SET;
}
__STATIC_INLINE uint32_t * nrf_rng_event_address_get(nrf_rng_event_t rng_event)
{
return (uint32_t *)((uint8_t *)NRF_RNG + rng_event);
}
__STATIC_INLINE void nrf_rng_event_clear(nrf_rng_event_t rng_event)
{
*((volatile uint32_t *)((uint8_t *)NRF_RNG + rng_event)) = NRF_RNG_EVENT_CLEAR;
#if __CORTEX_M == 0x04
volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)NRF_RNG + rng_event));
(void)dummy;
#endif
}
__STATIC_INLINE bool nrf_rng_event_get(nrf_rng_event_t rng_event)
{
return (bool) * ((volatile uint32_t *)((uint8_t *)NRF_RNG + rng_event));
}
__STATIC_INLINE void nrf_rng_shorts_enable(uint32_t rng_short_mask)
{
NRF_RNG->SHORTS |= rng_short_mask;
}
__STATIC_INLINE void nrf_rng_shorts_disable(uint32_t rng_short_mask)
{
NRF_RNG->SHORTS &= ~rng_short_mask;
}
__STATIC_INLINE uint8_t nrf_rng_random_value_get(void)
{
return (uint8_t)(NRF_RNG->VALUE & RNG_VALUE_VALUE_Msk);
}
__STATIC_INLINE void nrf_rng_error_correction_enable(void)
{
NRF_RNG->CONFIG |= RNG_CONFIG_DERCEN_Msk;
}
__STATIC_INLINE void nrf_rng_error_correction_disable(void)
{
NRF_RNG->CONFIG &= ~RNG_CONFIG_DERCEN_Msk;
}
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#endif
#ifdef __cplusplus
}
#endif
#endif /* NRF_RNG_H__ */