Initial commit: MT firmware project

- BLE peripheral applications
- dr_piezo and bladder_patch projects

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

modules/nrfx/drivers/src/nrfx_rng.c

@@ -0,0 +1,122 @@
+/**
+ * Copyright (c) 2016 - 2021, 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)