| /** |
| * 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_LPCOMP_ENABLED) |
| |
| #include <nrfx_lpcomp.h> |
| #include "prs/nrfx_prs.h" |
| |
| #define NRFX_LOG_MODULE LPCOMP |
| #include <nrfx_log.h> |
| |
| #define EVT_TO_STR(event) \ |
| (event == NRF_LPCOMP_EVENT_READY ? "NRF_LPCOMP_EVENT_READY" : \ |
| (event == NRF_LPCOMP_EVENT_DOWN ? "NRF_LPCOMP_EVENT_DOWN" : \ |
| (event == NRF_LPCOMP_EVENT_UP ? "NRF_LPCOMP_EVENT_UP" : \ |
| (event == NRF_LPCOMP_EVENT_CROSS ? "NRF_LPCOMP_EVENT_CROSS" : \ |
| "UNKNOWN EVENT")))) |
| |
| |
| static nrfx_lpcomp_event_handler_t m_lpcomp_event_handler = NULL; |
| static nrfx_drv_state_t m_state = NRFX_DRV_STATE_UNINITIALIZED; |
| |
| static void lpcomp_execute_handler(nrf_lpcomp_event_t event, uint32_t event_mask) |
| { |
| if (nrf_lpcomp_event_check(event) && nrf_lpcomp_int_enable_check(event_mask)) |
| { |
| nrf_lpcomp_event_clear(event); |
| NRFX_LOG_DEBUG("Event: %s.", EVT_TO_STR(event)); |
| |
| m_lpcomp_event_handler(event); |
| } |
| } |
| |
| void nrfx_lpcomp_irq_handler(void) |
| { |
| lpcomp_execute_handler(NRF_LPCOMP_EVENT_READY, LPCOMP_INTENSET_READY_Msk); |
| lpcomp_execute_handler(NRF_LPCOMP_EVENT_DOWN, LPCOMP_INTENSET_DOWN_Msk); |
| lpcomp_execute_handler(NRF_LPCOMP_EVENT_UP, LPCOMP_INTENSET_UP_Msk); |
| lpcomp_execute_handler(NRF_LPCOMP_EVENT_CROSS, LPCOMP_INTENSET_CROSS_Msk); |
| } |
| |
| nrfx_err_t nrfx_lpcomp_init(nrfx_lpcomp_config_t const * p_config, |
| nrfx_lpcomp_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) |
| { // LPCOMP 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_lpcomp_event_handler = event_handler; |
| |
| #if NRFX_CHECK(NRFX_PRS_ENABLED) |
| if (nrfx_prs_acquire(NRF_LPCOMP, nrfx_lpcomp_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_lpcomp_configure(&(p_config->hal)); |
| |
| nrf_lpcomp_input_select(p_config->input); |
| |
| switch (p_config->hal.detection) |
| { |
| case NRF_LPCOMP_DETECT_UP: |
| nrf_lpcomp_int_enable(LPCOMP_INTENSET_UP_Msk); |
| break; |
| |
| case NRF_LPCOMP_DETECT_DOWN: |
| nrf_lpcomp_int_enable(LPCOMP_INTENSET_DOWN_Msk); |
| break; |
| |
| case NRF_LPCOMP_DETECT_CROSS: |
| nrf_lpcomp_int_enable(LPCOMP_INTENSET_CROSS_Msk); |
| break; |
| |
| default: |
| break; |
| } |
| nrf_lpcomp_shorts_enable(NRF_LPCOMP_SHORT_READY_SAMPLE_MASK); |
| |
| NRFX_IRQ_PRIORITY_SET(LPCOMP_IRQn, p_config->interrupt_priority); |
| NRFX_IRQ_ENABLE(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_lpcomp_uninit(void) |
| { |
| NRFX_ASSERT(m_state != NRFX_DRV_STATE_UNINITIALIZED); |
| NRFX_IRQ_DISABLE(LPCOMP_IRQn); |
| nrfx_lpcomp_disable(); |
| #if NRFX_CHECK(NRFX_PRS_ENABLED) |
| nrfx_prs_release(NRF_LPCOMP); |
| #endif |
| m_state = NRFX_DRV_STATE_UNINITIALIZED; |
| m_lpcomp_event_handler = NULL; |
| NRFX_LOG_INFO("Uninitialized."); |
| } |
| |
| void nrfx_lpcomp_enable(void) |
| { |
| NRFX_ASSERT(m_state == NRFX_DRV_STATE_INITIALIZED); |
| nrf_lpcomp_enable(); |
| nrf_lpcomp_task_trigger(NRF_LPCOMP_TASK_START); |
| m_state = NRFX_DRV_STATE_POWERED_ON; |
| NRFX_LOG_INFO("Enabled."); |
| } |
| |
| void nrfx_lpcomp_disable(void) |
| { |
| NRFX_ASSERT(m_state == NRFX_DRV_STATE_POWERED_ON); |
| nrf_lpcomp_disable(); |
| nrf_lpcomp_task_trigger(NRF_LPCOMP_TASK_STOP); |
| m_state = NRFX_DRV_STATE_INITIALIZED; |
| NRFX_LOG_INFO("Disabled."); |
| } |
| |
| #endif // NRFX_CHECK(NRFX_LPCOMP_ENABLED) |