| /** |
| * Copyright (c) 2015 - 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 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 <nrfx.h> |
| |
| #if NRFX_CHECK(NRFX_COMP_ENABLED) |
| |
| #include <nrfx_comp.h> |
| #include "prs/nrfx_prs.h" |
| |
| #define NRFX_LOG_MODULE COMP |
| #include <nrfx_log.h> |
| |
| #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(COMP_LPCOMP_IRQn, p_config->interrupt_priority); |
| NRFX_IRQ_ENABLE(COMP_LPCOMP_IRQn); |
| |
| 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(COMP_LPCOMP_IRQn); |
| 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) |
