/** * Copyright (c) 2015 - 2020, 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 #if NRFX_CHECK(NRFX_COMP_ENABLED) #include #include "prs/nrfx_prs.h" #define NRFX_LOG_MODULE COMP #include #define EVT_TO_STR(event) \ (event == NRF_COMP_EVENT_READY ? "NRF_COMP_EVENT_READY" : \ (event == NRF_COMP_EVENT_DOWN ? "NRF_COMP_EVENT_DOWN" : \ (event == NRF_COMP_EVENT_UP ? "NRF_COMP_EVENT_UP" : \ (event == NRF_COMP_EVENT_CROSS ? "NRF_COMP_EVENT_CROSS" : \ "UNKNOWN ERROR")))) static nrfx_comp_event_handler_t m_comp_event_handler = NULL; static nrfx_drv_state_t m_state = NRFX_DRV_STATE_UNINITIALIZED; static void comp_execute_handler(nrf_comp_event_t event, uint32_t event_mask) { if (nrf_comp_event_check(event) && nrf_comp_int_enable_check(event_mask)) { nrf_comp_event_clear(event); NRFX_LOG_DEBUG("Event: %s.", EVT_TO_STR(event)); m_comp_event_handler(event); } } void nrfx_comp_irq_handler(void) { comp_execute_handler(NRF_COMP_EVENT_READY, COMP_INTENSET_READY_Msk); comp_execute_handler(NRF_COMP_EVENT_DOWN, COMP_INTENSET_DOWN_Msk); comp_execute_handler(NRF_COMP_EVENT_UP, COMP_INTENSET_UP_Msk); comp_execute_handler(NRF_COMP_EVENT_CROSS, COMP_INTENSET_CROSS_Msk); } nrfx_err_t nrfx_comp_init(nrfx_comp_config_t const * p_config, nrfx_comp_event_handler_t event_handler) { NRFX_ASSERT(p_config); NRFX_ASSERT(event_handler); nrfx_err_t err_code; if (m_state != NRFX_DRV_STATE_UNINITIALIZED) { // COMP driver is already initialized err_code = NRFX_ERROR_INVALID_STATE; NRFX_LOG_WARNING("Function: %s, error code: %s.", __func__, NRFX_LOG_ERROR_STRING_GET(err_code)); return err_code; } m_comp_event_handler = event_handler; #if NRFX_CHECK(NRFX_PRS_ENABLED) if (nrfx_prs_acquire(NRF_COMP, nrfx_comp_irq_handler) != NRFX_SUCCESS) { err_code = NRFX_ERROR_BUSY; NRFX_LOG_WARNING("Function: %s, error code: %s.", __func__, NRFX_LOG_ERROR_STRING_GET(err_code)); return err_code; } #endif nrf_comp_task_trigger(NRF_COMP_TASK_STOP); nrf_comp_enable(); // Clear events to be sure there are no leftovers. nrf_comp_event_clear(NRF_COMP_EVENT_READY); nrf_comp_event_clear(NRF_COMP_EVENT_DOWN); nrf_comp_event_clear(NRF_COMP_EVENT_UP); nrf_comp_event_clear(NRF_COMP_EVENT_CROSS); nrf_comp_ref_set(p_config->reference); //If external source is chosen, write to appropriate register. if (p_config->reference == COMP_REFSEL_REFSEL_ARef) { nrf_comp_ext_ref_set(p_config->ext_ref); } nrf_comp_th_set(p_config->threshold); nrf_comp_main_mode_set(p_config->main_mode); nrf_comp_speed_mode_set(p_config->speed_mode); nrf_comp_hysteresis_set(p_config->hyst); #if defined (COMP_ISOURCE_ISOURCE_Msk) nrf_comp_isource_set(p_config->isource); #endif nrf_comp_shorts_disable(NRFX_COMP_SHORT_STOP_AFTER_CROSS_EVT | NRFX_COMP_SHORT_STOP_AFTER_UP_EVT | NRFX_COMP_SHORT_STOP_AFTER_DOWN_EVT); nrf_comp_int_disable(COMP_INTENCLR_CROSS_Msk | COMP_INTENCLR_UP_Msk | COMP_INTENCLR_DOWN_Msk | COMP_INTENCLR_READY_Msk); nrf_comp_input_select(p_config->input); NRFX_IRQ_PRIORITY_SET(nrfx_get_irq_number(NRF_COMP), p_config->interrupt_priority); NRFX_IRQ_ENABLE(nrfx_get_irq_number(NRF_COMP)); m_state = NRFX_DRV_STATE_INITIALIZED; err_code = NRFX_SUCCESS; NRFX_LOG_INFO("Function: %s, error code: %s.", __func__, NRFX_LOG_ERROR_STRING_GET(err_code)); return err_code; } void nrfx_comp_uninit(void) { NRFX_ASSERT(m_state != NRFX_DRV_STATE_UNINITIALIZED); NRFX_IRQ_DISABLE(nrfx_get_irq_number(NRF_COMP)); nrf_comp_disable(); #if NRFX_CHECK(NRFX_PRS_ENABLED) nrfx_prs_release(NRF_COMP); #endif m_state = NRFX_DRV_STATE_UNINITIALIZED; m_comp_event_handler = NULL; NRFX_LOG_INFO("Uninitialized."); } void nrfx_comp_pin_select(nrf_comp_input_t psel) { bool comp_enable_state = nrf_comp_enable_check(); nrf_comp_task_trigger(NRF_COMP_TASK_STOP); if (m_state == NRFX_DRV_STATE_POWERED_ON) { m_state = NRFX_DRV_STATE_INITIALIZED; } nrf_comp_disable(); nrf_comp_input_select(psel); if (comp_enable_state == true) { nrf_comp_enable(); } } void nrfx_comp_start(uint32_t comp_int_mask, uint32_t comp_shorts_mask) { NRFX_ASSERT(m_state == NRFX_DRV_STATE_INITIALIZED); nrf_comp_int_enable(comp_int_mask); nrf_comp_shorts_enable(comp_shorts_mask); nrf_comp_task_trigger(NRF_COMP_TASK_START); m_state = NRFX_DRV_STATE_POWERED_ON; NRFX_LOG_INFO("Enabled."); } void nrfx_comp_stop(void) { NRFX_ASSERT(m_state == NRFX_DRV_STATE_POWERED_ON); nrf_comp_shorts_disable(UINT32_MAX); nrf_comp_int_disable(UINT32_MAX); nrf_comp_task_trigger(NRF_COMP_TASK_STOP); m_state = NRFX_DRV_STATE_INITIALIZED; NRFX_LOG_INFO("Disabled."); } uint32_t nrfx_comp_sample() { NRFX_ASSERT(m_state == NRFX_DRV_STATE_POWERED_ON); nrf_comp_task_trigger(NRF_COMP_TASK_SAMPLE); return nrf_comp_result_get(); } #endif // NRFX_CHECK(NRFX_COMP_ENABLED)