diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_comp.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_comp.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_comp.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_comp.c new file mode 100644 index 0000000..63572d5 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_comp.c @@ -0,0 +1,211 @@ +/** + * 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, 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_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) |