diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_rng.c')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_rng.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_rng.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_rng.c new file mode 100644 index 0000000..a179f7c --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_rng.c @@ -0,0 +1,122 @@ +/** + * Copyright (c) 2016 - 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, 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. + * + */ + +#include <nrfx.h> + +#if NRFX_CHECK(NRFX_RNG_ENABLED) + +#include <nrfx_rng.h> + +#define NRFX_LOG_MODULE RNG +#include <nrfx_log.h> + +/** + * @brief Internal state of RNG driver. + */ +static nrfx_drv_state_t m_rng_state; + +/** + * @brief Pointer to handler calling from interrupt routine. + */ +static nrfx_rng_evt_handler_t m_rng_hndl; + +nrfx_err_t nrfx_rng_init(nrfx_rng_config_t const * p_config, nrfx_rng_evt_handler_t handler) +{ + NRFX_ASSERT(p_config); + NRFX_ASSERT(handler); + if (m_rng_state != NRFX_DRV_STATE_UNINITIALIZED) + { + return NRFX_ERROR_ALREADY_INITIALIZED; + } + + m_rng_hndl = handler; + + if (p_config->error_correction) + { + nrf_rng_error_correction_enable(); + } + nrf_rng_shorts_disable(NRF_RNG_SHORT_VALRDY_STOP_MASK); + NRFX_IRQ_PRIORITY_SET(RNG_IRQn, p_config->interrupt_priority); + NRFX_IRQ_ENABLE(RNG_IRQn); + + m_rng_state = NRFX_DRV_STATE_INITIALIZED; + + return NRFX_SUCCESS; +} + +void nrfx_rng_start(void) +{ + NRFX_ASSERT(m_rng_state == NRFX_DRV_STATE_INITIALIZED); + nrf_rng_event_clear(NRF_RNG_EVENT_VALRDY); + nrf_rng_int_enable(NRF_RNG_INT_VALRDY_MASK); + nrf_rng_task_trigger(NRF_RNG_TASK_START); +} + +void nrfx_rng_stop(void) +{ + NRFX_ASSERT(m_rng_state == NRFX_DRV_STATE_INITIALIZED); + nrf_rng_int_disable(NRF_RNG_INT_VALRDY_MASK); + nrf_rng_task_trigger(NRF_RNG_TASK_STOP); +} + +void nrfx_rng_uninit(void) +{ + NRFX_ASSERT(m_rng_state == NRFX_DRV_STATE_INITIALIZED); + + nrf_rng_int_disable(NRF_RNG_INT_VALRDY_MASK); + nrf_rng_task_trigger(NRF_RNG_TASK_STOP); + NRFX_IRQ_DISABLE(RNG_IRQn); + + m_rng_state = NRFX_DRV_STATE_UNINITIALIZED; + NRFX_LOG_INFO("Uninitialized."); +} + +void nrfx_rng_irq_handler(void) +{ + nrf_rng_event_clear(NRF_RNG_EVENT_VALRDY); + + uint8_t rng_value = nrf_rng_random_value_get(); + + m_rng_hndl(rng_value); + + NRFX_LOG_DEBUG("Event: NRF_RNG_EVENT_VALRDY."); +} + +#endif // NRFX_CHECK(NRFX_RNG_ENABLED) |