| /** |
| * Copyright (c) 2014 - 2018, 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 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 the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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_RNG_H__ |
| #define NRF_RNG_H__ |
| |
| #include <nrfx.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * @defgroup nrf_rng_hal RNG HAL |
| * @{ |
| * @ingroup nrf_rng |
| * @brief Hardware access layer for managing the Random Number Generator (RNG) peripheral. |
| */ |
| |
| #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. |
| */ |
| __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. |
| */ |
| __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. |
| */ |
| __STATIC_INLINE bool nrf_rng_int_get(nrf_rng_int_mask_t rng_int_mask); |
| |
| /** |
| * @brief Function for getting the address of a specific task. |
| * |
| * This function can be used by the PPI module. |
| * |
| * @param[in] rng_task Task. |
| */ |
| __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. |
| */ |
| __STATIC_INLINE void nrf_rng_task_trigger(nrf_rng_task_t rng_task); |
| |
| /** |
| * @brief Function for getting address of a specific event. |
| * |
| * This function can be used by the PPI module. |
| * |
| * @param[in] rng_event Event. |
| */ |
| __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. |
| */ |
| __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. |
| */ |
| __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. |
| * |
| */ |
| __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. |
| * |
| */ |
| __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. |
| */ |
| __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; |
| } |
| |
| #endif |
| |
| /** @} */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* NRF_RNG_H__ */ |