/* * Copyright (c) 2019 - 2025, Nordic Semiconductor ASA * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause * * 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. */ #include #if NRFX_CHECK(NRFX_EGU_ENABLED) #if !NRFX_FEATURE_PRESENT(NRFX_EGU, _ENABLED) #error "No enabled EGU instances. Check ." #endif #if NRFX_CHECK(NRFX_EGU0_ENABLED) && ((1 << 0) & NRFX_EGUS_USED) #error "EGU instance 0 is reserved for use outside of nrfx." #endif #if NRFX_CHECK(NRFX_EGU1_ENABLED) && ((1 << 1) & NRFX_EGUS_USED) #error "EGU instance 1 is reserved for use outside of nrfx." #endif #if NRFX_CHECK(NRFX_EGU2_ENABLED) && ((1 << 2) & NRFX_EGUS_USED) #error "EGU instance 2 is reserved for use outside of nrfx." #endif #if NRFX_CHECK(NRFX_EGU3_ENABLED) && ((1 << 3) & NRFX_EGUS_USED) #error "EGU instance 3 is reserved for use outside of nrfx." #endif #if NRFX_CHECK(NRFX_EGU4_ENABLED) && ((1 << 4) & NRFX_EGUS_USED) #error "EGU instance 4 is reserved for use outside of nrfx." #endif #if NRFX_CHECK(NRFX_EGU5_ENABLED) && ((1 << 5) & NRFX_EGUS_USED) #error "EGU instance 5 is reserved for use outside of nrfx." #endif #include typedef struct { nrfx_egu_event_handler_t handler; void * p_context; nrfx_drv_state_t state; } egu_control_block_t; static egu_control_block_t m_cb[NRFX_EGU_ENABLED_COUNT]; /* * `-Warray-bounds` warning is disabled for the `egu_event_mask_get_and_clear` * function because GCC 12 and above may report a false positive due to accessing * event registers. */ #if defined(__GNUC__) #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Warray-bounds" #endif static uint32_t egu_event_mask_get_and_clear(NRF_EGU_Type * p_reg, uint32_t int_mask) { uint32_t event_mask = 0; while (int_mask) { uint8_t event_idx = (uint8_t)NRF_CTZ(int_mask); int_mask &= ~(1UL << event_idx); nrf_egu_event_t event = nrf_egu_triggered_event_get(event_idx); if (nrf_egu_event_check(p_reg, event)) { nrf_egu_event_clear(p_reg, event); event_mask |= (1UL << event_idx); } } return event_mask; } #if defined(__GNUC__) #pragma GCC diagnostic pop #endif nrfx_err_t nrfx_egu_init(nrfx_egu_t const * p_instance, uint8_t interrupt_priority, nrfx_egu_event_handler_t event_handler, void * p_context) { egu_control_block_t * p_cb = &m_cb[p_instance->drv_inst_idx]; if (p_cb->state != NRFX_DRV_STATE_UNINITIALIZED) { #if NRFX_API_VER_AT_LEAST(3, 2, 0) return NRFX_ERROR_ALREADY; #else return NRFX_ERROR_INVALID_STATE; #endif } p_cb->state = NRFX_DRV_STATE_INITIALIZED; p_cb->p_context = p_context; p_cb->handler = event_handler; if (event_handler) { NRFX_IRQ_ENABLE(nrfx_get_irq_number(p_instance->p_reg)); NRFX_IRQ_PRIORITY_SET(nrfx_get_irq_number(p_instance->p_reg), interrupt_priority); } return NRFX_SUCCESS; } void nrfx_egu_int_enable(nrfx_egu_t const * p_instance, uint32_t mask) { NRFX_ASSERT(m_cb[p_instance->drv_inst_idx].state == NRFX_DRV_STATE_INITIALIZED); NRFX_ASSERT(m_cb[p_instance->drv_inst_idx].handler); (void)egu_event_mask_get_and_clear(p_instance->p_reg, mask); nrf_egu_int_enable(p_instance->p_reg, mask); } void nrfx_egu_int_disable(nrfx_egu_t const * p_instance, uint32_t mask) { NRFX_ASSERT(m_cb[p_instance->drv_inst_idx].state == NRFX_DRV_STATE_INITIALIZED); nrf_egu_int_disable(p_instance->p_reg, mask); } void nrfx_egu_trigger(nrfx_egu_t const * p_instance, uint8_t event_idx) { NRFX_ASSERT(m_cb[p_instance->drv_inst_idx].state == NRFX_DRV_STATE_INITIALIZED); NRFX_ASSERT(event_idx < nrf_egu_channel_count(p_instance->p_reg)); nrf_egu_task_trigger(p_instance->p_reg, nrf_egu_trigger_task_get(event_idx)); } void nrfx_egu_uninit(nrfx_egu_t const * p_instance) { egu_control_block_t * p_cb = &m_cb[p_instance->drv_inst_idx]; nrf_egu_int_disable(p_instance->p_reg, ~0UL); NRFX_IRQ_DISABLE(nrfx_get_irq_number(p_instance->p_reg)); p_cb->state = NRFX_DRV_STATE_UNINITIALIZED; } bool nrfx_egu_init_check(nrfx_egu_t const * p_instance) { egu_control_block_t * p_cb = &m_cb[p_instance->drv_inst_idx]; return (p_cb->state != NRFX_DRV_STATE_UNINITIALIZED); } static void irq_handler(NRF_EGU_Type * p_reg, egu_control_block_t * p_cb) { uint32_t int_mask = nrf_egu_int_enable_check(p_reg, ~0UL); /* Check (and clear) only the events that are set to generate interrupts. Leave the other ones untouched. */ uint32_t event_mask = egu_event_mask_get_and_clear(p_reg, int_mask); while (event_mask) { uint8_t event_idx = (uint8_t)NRF_CTZ(event_mask); event_mask &= ~(1UL << event_idx); p_cb->handler(event_idx, p_cb->p_context); } } NRFX_INSTANCE_IRQ_HANDLERS(EGU, egu) #endif // NRFX_CHECK(NRFX_EGU_ENABLED)