72f5eb3cd9
- BLE peripheral applications - dr_piezo and bladder_patch projects Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
/**
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* Copyright (c) 2016 - 2021, Nordic Semiconductor ASA
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*
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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 modification,
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* 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, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA 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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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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 SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <nrfx.h>
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#if NRFX_CHECK(NRFX_RNG_ENABLED)
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#include <nrfx_rng.h>
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#define NRFX_LOG_MODULE RNG
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#include <nrfx_log.h>
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/**
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* @brief Internal state of RNG driver.
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*/
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static nrfx_drv_state_t m_rng_state;
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/**
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* @brief Pointer to handler calling from interrupt routine.
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*/
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static nrfx_rng_evt_handler_t m_rng_hndl;
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nrfx_err_t nrfx_rng_init(nrfx_rng_config_t const * p_config, nrfx_rng_evt_handler_t handler)
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{
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NRFX_ASSERT(p_config);
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NRFX_ASSERT(handler);
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if (m_rng_state != NRFX_DRV_STATE_UNINITIALIZED)
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{
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return NRFX_ERROR_ALREADY_INITIALIZED;
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}
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m_rng_hndl = handler;
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if (p_config->error_correction)
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{
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nrf_rng_error_correction_enable();
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}
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nrf_rng_shorts_disable(NRF_RNG_SHORT_VALRDY_STOP_MASK);
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NRFX_IRQ_PRIORITY_SET(RNG_IRQn, p_config->interrupt_priority);
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NRFX_IRQ_ENABLE(RNG_IRQn);
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m_rng_state = NRFX_DRV_STATE_INITIALIZED;
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return NRFX_SUCCESS;
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}
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void nrfx_rng_start(void)
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{
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NRFX_ASSERT(m_rng_state == NRFX_DRV_STATE_INITIALIZED);
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nrf_rng_event_clear(NRF_RNG_EVENT_VALRDY);
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nrf_rng_int_enable(NRF_RNG_INT_VALRDY_MASK);
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nrf_rng_task_trigger(NRF_RNG_TASK_START);
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}
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void nrfx_rng_stop(void)
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{
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NRFX_ASSERT(m_rng_state == NRFX_DRV_STATE_INITIALIZED);
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nrf_rng_int_disable(NRF_RNG_INT_VALRDY_MASK);
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nrf_rng_task_trigger(NRF_RNG_TASK_STOP);
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}
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void nrfx_rng_uninit(void)
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{
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NRFX_ASSERT(m_rng_state == NRFX_DRV_STATE_INITIALIZED);
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nrf_rng_int_disable(NRF_RNG_INT_VALRDY_MASK);
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nrf_rng_task_trigger(NRF_RNG_TASK_STOP);
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NRFX_IRQ_DISABLE(RNG_IRQn);
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m_rng_state = NRFX_DRV_STATE_UNINITIALIZED;
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NRFX_LOG_INFO("Uninitialized.");
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}
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void nrfx_rng_irq_handler(void)
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{
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nrf_rng_event_clear(NRF_RNG_EVENT_VALRDY);
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uint8_t rng_value = nrf_rng_random_value_get();
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m_rng_hndl(rng_value);
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NRFX_LOG_DEBUG("Event: NRF_RNG_EVENT_VALRDY.");
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}
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#endif // NRFX_CHECK(NRFX_RNG_ENABLED)
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