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402 lines
16 KiB
402 lines
16 KiB
/*
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* Copyright (c) 2014 - 2019, Nordic Semiconductor ASA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef NRF_LPCOMP_H_
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#define NRF_LPCOMP_H_
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#include <nrfx.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @defgroup nrf_lpcomp_hal LPCOMP HAL
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* @{
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* @ingroup nrf_lpcomp
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* @brief Hardware access layer for managing the Low Power Comparator (LPCOMP) peripheral.
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*/
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/** @brief LPCOMP reference selection. */
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typedef enum
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{
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#if (LPCOMP_REFSEL_RESOLUTION == 8) || defined(__NRFX_DOXYGEN__)
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NRF_LPCOMP_REF_SUPPLY_1_8 = LPCOMP_REFSEL_REFSEL_SupplyOneEighthPrescaling, /**< Use supply with a 1/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_2_8 = LPCOMP_REFSEL_REFSEL_SupplyTwoEighthsPrescaling, /**< Use supply with a 2/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_3_8 = LPCOMP_REFSEL_REFSEL_SupplyThreeEighthsPrescaling, /**< Use supply with a 3/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_4_8 = LPCOMP_REFSEL_REFSEL_SupplyFourEighthsPrescaling, /**< Use supply with a 4/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_5_8 = LPCOMP_REFSEL_REFSEL_SupplyFiveEighthsPrescaling, /**< Use supply with a 5/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_6_8 = LPCOMP_REFSEL_REFSEL_SupplySixEighthsPrescaling, /**< Use supply with a 6/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_7_8 = LPCOMP_REFSEL_REFSEL_SupplySevenEighthsPrescaling, /**< Use supply with a 7/8 prescaler as reference. */
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#elif (LPCOMP_REFSEL_RESOLUTION == 16) || defined(__NRFX_DOXYGEN__)
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NRF_LPCOMP_REF_SUPPLY_1_8 = LPCOMP_REFSEL_REFSEL_Ref1_8Vdd, /**< Use supply with a 1/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_2_8 = LPCOMP_REFSEL_REFSEL_Ref2_8Vdd, /**< Use supply with a 2/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_3_8 = LPCOMP_REFSEL_REFSEL_Ref3_8Vdd, /**< Use supply with a 3/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_4_8 = LPCOMP_REFSEL_REFSEL_Ref4_8Vdd, /**< Use supply with a 4/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_5_8 = LPCOMP_REFSEL_REFSEL_Ref5_8Vdd, /**< Use supply with a 5/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_6_8 = LPCOMP_REFSEL_REFSEL_Ref6_8Vdd, /**< Use supply with a 6/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_7_8 = LPCOMP_REFSEL_REFSEL_Ref7_8Vdd, /**< Use supply with a 7/8 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_1_16 = LPCOMP_REFSEL_REFSEL_Ref1_16Vdd, /**< Use supply with a 1/16 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_3_16 = LPCOMP_REFSEL_REFSEL_Ref3_16Vdd, /**< Use supply with a 3/16 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_5_16 = LPCOMP_REFSEL_REFSEL_Ref5_16Vdd, /**< Use supply with a 5/16 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_7_16 = LPCOMP_REFSEL_REFSEL_Ref7_16Vdd, /**< Use supply with a 7/16 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_9_16 = LPCOMP_REFSEL_REFSEL_Ref9_16Vdd, /**< Use supply with a 9/16 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_11_16 = LPCOMP_REFSEL_REFSEL_Ref11_16Vdd, /**< Use supply with a 11/16 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_13_16 = LPCOMP_REFSEL_REFSEL_Ref13_16Vdd, /**< Use supply with a 13/16 prescaler as reference. */
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NRF_LPCOMP_REF_SUPPLY_15_16 = LPCOMP_REFSEL_REFSEL_Ref15_16Vdd, /**< Use supply with a 15/16 prescaler as reference. */
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#endif
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NRF_LPCOMP_REF_EXT_REF0 = LPCOMP_REFSEL_REFSEL_ARef |
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(LPCOMP_EXTREFSEL_EXTREFSEL_AnalogReference0 << 16), /**< External reference 0. */
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NRF_LPCOMP_CONFIG_REF_EXT_REF1 = LPCOMP_REFSEL_REFSEL_ARef |
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(LPCOMP_EXTREFSEL_EXTREFSEL_AnalogReference1 << 16), /**< External reference 1. */
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} nrf_lpcomp_ref_t;
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/** @brief LPCOMP input selection. */
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typedef enum
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{
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NRF_LPCOMP_INPUT_0 = LPCOMP_PSEL_PSEL_AnalogInput0, /**< Input 0. */
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NRF_LPCOMP_INPUT_1 = LPCOMP_PSEL_PSEL_AnalogInput1, /**< Input 1. */
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NRF_LPCOMP_INPUT_2 = LPCOMP_PSEL_PSEL_AnalogInput2, /**< Input 2. */
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NRF_LPCOMP_INPUT_3 = LPCOMP_PSEL_PSEL_AnalogInput3, /**< Input 3. */
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NRF_LPCOMP_INPUT_4 = LPCOMP_PSEL_PSEL_AnalogInput4, /**< Input 4. */
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NRF_LPCOMP_INPUT_5 = LPCOMP_PSEL_PSEL_AnalogInput5, /**< Input 5. */
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NRF_LPCOMP_INPUT_6 = LPCOMP_PSEL_PSEL_AnalogInput6, /**< Input 6. */
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NRF_LPCOMP_INPUT_7 = LPCOMP_PSEL_PSEL_AnalogInput7 /**< Input 7. */
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} nrf_lpcomp_input_t;
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/** @brief LPCOMP detection type selection. */
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typedef enum
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{
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NRF_LPCOMP_DETECT_CROSS = LPCOMP_ANADETECT_ANADETECT_Cross, /**< Generate ANADETEC on crossing, both upwards and downwards crossing. */
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NRF_LPCOMP_DETECT_UP = LPCOMP_ANADETECT_ANADETECT_Up, /**< Generate ANADETEC on upwards crossing only. */
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NRF_LPCOMP_DETECT_DOWN = LPCOMP_ANADETECT_ANADETECT_Down /**< Generate ANADETEC on downwards crossing only. */
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} nrf_lpcomp_detect_t;
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/** @brief LPCOMP tasks. */
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typedef enum
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{
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NRF_LPCOMP_TASK_START = offsetof(NRF_LPCOMP_Type, TASKS_START), /**< LPCOMP start sampling task. */
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NRF_LPCOMP_TASK_STOP = offsetof(NRF_LPCOMP_Type, TASKS_STOP), /**< LPCOMP stop sampling task. */
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NRF_LPCOMP_TASK_SAMPLE = offsetof(NRF_LPCOMP_Type, TASKS_SAMPLE) /**< Sample comparator value. */
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} nrf_lpcomp_task_t;
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/** @brief LPCOMP events. */
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typedef enum
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{
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NRF_LPCOMP_EVENT_READY = offsetof(NRF_LPCOMP_Type, EVENTS_READY), /**< LPCOMP is ready and output is valid. */
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NRF_LPCOMP_EVENT_DOWN = offsetof(NRF_LPCOMP_Type, EVENTS_DOWN), /**< Input voltage crossed the threshold going down. */
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NRF_LPCOMP_EVENT_UP = offsetof(NRF_LPCOMP_Type, EVENTS_UP), /**< Input voltage crossed the threshold going up. */
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NRF_LPCOMP_EVENT_CROSS = offsetof(NRF_LPCOMP_Type, EVENTS_CROSS) /**< Input voltage crossed the threshold in any direction. */
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} nrf_lpcomp_event_t;
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/** @brief LPCOMP shortcut masks. */
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typedef enum
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{
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NRF_LPCOMP_SHORT_CROSS_STOP_MASK = LPCOMP_SHORTS_CROSS_STOP_Msk, /*!< Shortcut between CROSS event and STOP task. */
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NRF_LPCOMP_SHORT_UP_STOP_MASK = LPCOMP_SHORTS_UP_STOP_Msk, /*!< Shortcut between UP event and STOP task. */
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NRF_LPCOMP_SHORT_DOWN_STOP_MASK = LPCOMP_SHORTS_DOWN_STOP_Msk, /*!< Shortcut between DOWN event and STOP task. */
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NRF_LPCOMP_SHORT_READY_STOP_MASK = LPCOMP_SHORTS_READY_STOP_Msk, /*!< Shortcut between READY event and STOP task. */
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NRF_LPCOMP_SHORT_READY_SAMPLE_MASK = LPCOMP_SHORTS_READY_SAMPLE_Msk /*!< Shortcut between READY event and SAMPLE task. */
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} nrf_lpcomp_short_mask_t;
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#ifdef LPCOMP_FEATURE_HYST_PRESENT
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/** @brief LPCOMP hysteresis. */
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typedef enum
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{
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NRF_LPCOMP_HYST_NOHYST = LPCOMP_HYST_HYST_NoHyst, /**< Comparator hysteresis disabled. */
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NRF_LPCOMP_HYST_50mV = LPCOMP_HYST_HYST_Hyst50mV /**< Comparator hysteresis enabled (typically 50 mV). */
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}nrf_lpcomp_hysteresis_t;
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#endif // LPCOMP_FEATURE_HYST_PRESENT
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/** @brief LPCOMP configuration. */
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typedef struct
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{
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nrf_lpcomp_ref_t reference; /**< LPCOMP reference. */
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nrf_lpcomp_detect_t detection; /**< LPCOMP detection type. */
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#ifdef LPCOMP_FEATURE_HYST_PRESENT
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nrf_lpcomp_hysteresis_t hyst; /**< LPCOMP hysteresis. */
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#endif // LPCOMP_FEATURE_HYST_PRESENT
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} nrf_lpcomp_config_t;
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/** Default LPCOMP configuration. */
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#define NRF_LPCOMP_CONFIG_DEFAULT { NRF_LPCOMP_REF_SUPPLY_FOUR_EIGHT, NRF_LPCOMP_DETECT_DOWN }
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/**
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* @brief Function for configuring LPCOMP.
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*
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* This function powers on LPCOMP and configures it. LPCOMP is in DISABLE state after configuration,
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* so it must be enabled before using it. All shorts are inactive, events are cleared, and LPCOMP is stopped.
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*
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* @param[in] p_config Configuration.
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*/
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__STATIC_INLINE void nrf_lpcomp_configure(const nrf_lpcomp_config_t * p_config);
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/**
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* @brief Function for selecting the LPCOMP input.
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*
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* This function selects the active input of LPCOMP.
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*
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* @param[in] input Input to be selected.
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*/
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__STATIC_INLINE void nrf_lpcomp_input_select(nrf_lpcomp_input_t input);
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/**
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* @brief Function for enabling the Low Power Comparator.
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*
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* This function enables LPCOMP.
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*/
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__STATIC_INLINE void nrf_lpcomp_enable(void);
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/**
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* @brief Function for disabling the Low Power Comparator.
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*
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* This function disables LPCOMP.
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*/
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__STATIC_INLINE void nrf_lpcomp_disable(void);
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/**
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* @brief Function for getting the last LPCOMP compare result.
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*
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* @return The last compare result. If 0 then VIN+ < VIN-, if 1 then the opposite.
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*/
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__STATIC_INLINE uint32_t nrf_lpcomp_result_get(void);
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/**
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* @brief Function for enabling interrupts from LPCOMP.
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*
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* @param[in] int_mask Mask of interrupts to be enabled.
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*
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* @sa nrf_lpcomp_int_disable
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* @sa nrf_lpcomp_int_enable_check
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*/
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__STATIC_INLINE void nrf_lpcomp_int_enable(uint32_t int_mask);
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/**
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* @brief Function for disabling interrupts from LPCOMP.
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*
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* @param[in] int_mask Mask of interrupts to be disabled.
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*
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* @sa nrf_lpcomp_int_enable
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* @sa nrf_lpcomp_int_enable_check
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*/
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__STATIC_INLINE void nrf_lpcomp_int_disable(uint32_t int_mask);
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/**
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* @brief Function for getting the enabled interrupts of LPCOMP.
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*
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* @param[in] int_mask Mask of interrupts to be checked.
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*
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* @retval true Any of interrupts of the specified mask are enabled.
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* @retval false None interrupt specified by the mask are enabled.
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*
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* @sa nrf_lpcomp_int_enable
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* @sa nrf_lpcomp_int_disable
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*/
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__STATIC_INLINE bool nrf_lpcomp_int_enable_check(uint32_t int_mask);
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/**
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* @brief Function for getting the address of the specified LPCOMP task register.
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*
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* @param[in] task LPCOMP task.
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*
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* @return The address of the specified LPCOMP task.
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*/
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__STATIC_INLINE uint32_t * nrf_lpcomp_task_address_get(nrf_lpcomp_task_t task);
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/**
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* @brief Function for getting the address of the specified LPCOMP event register.
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*
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* @param[in] event LPCOMP event.
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*
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* @return The address of the specified LPCOMP event.
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*/
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__STATIC_INLINE uint32_t * nrf_lpcomp_event_address_get(nrf_lpcomp_event_t event);
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/**
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* @brief Function for setting LPCOMP shorts.
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*
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* @param[in] mask Mask of shortcuts.
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*/
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__STATIC_INLINE void nrf_lpcomp_shorts_enable(uint32_t mask);
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/**
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* @brief Function for clearing LPCOMP shorts by mask.
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*
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* @param[in] mask Mask of shortcuts.
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*/
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__STATIC_INLINE void nrf_lpcomp_shorts_disable(uint32_t mask);
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/**
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* @brief Function for setting the specified LPCOMP task.
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*
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* @param[in] task LPCOMP task to be set.
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*/
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__STATIC_INLINE void nrf_lpcomp_task_trigger(nrf_lpcomp_task_t task);
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/**
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* @brief Function for clearing the specified LPCOMP event.
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*
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* @param[in] event LPCOMP event to be cleared.
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*/
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__STATIC_INLINE void nrf_lpcomp_event_clear(nrf_lpcomp_event_t event);
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/**
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* @brief Function for retrieving the state of the LPCOMP event.
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*
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* @param[in] event Event to be checked.
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*
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* @retval true The event has been generated.
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* @retval false The event has not been generated.
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*/
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__STATIC_INLINE bool nrf_lpcomp_event_check(nrf_lpcomp_event_t event);
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#ifndef SUPPRESS_INLINE_IMPLEMENTATION
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__STATIC_INLINE void nrf_lpcomp_configure(const nrf_lpcomp_config_t * p_config)
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{
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NRF_LPCOMP->TASKS_STOP = 1;
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NRF_LPCOMP->ENABLE = LPCOMP_ENABLE_ENABLE_Disabled << LPCOMP_ENABLE_ENABLE_Pos;
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NRF_LPCOMP->REFSEL =
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(p_config->reference << LPCOMP_REFSEL_REFSEL_Pos) & LPCOMP_REFSEL_REFSEL_Msk;
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//If external source is choosen extract analog reference index.
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if ((p_config->reference & LPCOMP_REFSEL_REFSEL_ARef)==LPCOMP_REFSEL_REFSEL_ARef)
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{
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uint32_t extref = p_config->reference >> 16;
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NRF_LPCOMP->EXTREFSEL = (extref << LPCOMP_EXTREFSEL_EXTREFSEL_Pos) &
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LPCOMP_EXTREFSEL_EXTREFSEL_Msk;
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}
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NRF_LPCOMP->ANADETECT =
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(p_config->detection << LPCOMP_ANADETECT_ANADETECT_Pos) & LPCOMP_ANADETECT_ANADETECT_Msk;
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#ifdef LPCOMP_FEATURE_HYST_PRESENT
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NRF_LPCOMP->HYST = ((p_config->hyst) << LPCOMP_HYST_HYST_Pos) & LPCOMP_HYST_HYST_Msk;
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#endif //LPCOMP_FEATURE_HYST_PRESENT
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NRF_LPCOMP->SHORTS = 0;
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NRF_LPCOMP->INTENCLR = LPCOMP_INTENCLR_CROSS_Msk | LPCOMP_INTENCLR_UP_Msk |
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LPCOMP_INTENCLR_DOWN_Msk | LPCOMP_INTENCLR_READY_Msk;
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}
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__STATIC_INLINE void nrf_lpcomp_input_select(nrf_lpcomp_input_t input)
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{
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uint32_t lpcomp_enable_state = NRF_LPCOMP->ENABLE;
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NRF_LPCOMP->ENABLE = LPCOMP_ENABLE_ENABLE_Disabled << LPCOMP_ENABLE_ENABLE_Pos;
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NRF_LPCOMP->PSEL =
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((uint32_t)input << LPCOMP_PSEL_PSEL_Pos) | (NRF_LPCOMP->PSEL & ~LPCOMP_PSEL_PSEL_Msk);
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NRF_LPCOMP->ENABLE = lpcomp_enable_state;
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}
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__STATIC_INLINE void nrf_lpcomp_enable(void)
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{
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NRF_LPCOMP->ENABLE = LPCOMP_ENABLE_ENABLE_Enabled << LPCOMP_ENABLE_ENABLE_Pos;
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NRF_LPCOMP->EVENTS_READY = 0;
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NRF_LPCOMP->EVENTS_DOWN = 0;
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NRF_LPCOMP->EVENTS_UP = 0;
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NRF_LPCOMP->EVENTS_CROSS = 0;
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}
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__STATIC_INLINE void nrf_lpcomp_disable(void)
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{
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NRF_LPCOMP->ENABLE = LPCOMP_ENABLE_ENABLE_Disabled << LPCOMP_ENABLE_ENABLE_Pos;
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}
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__STATIC_INLINE uint32_t nrf_lpcomp_result_get(void)
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{
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return (uint32_t)NRF_LPCOMP->RESULT;
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}
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__STATIC_INLINE void nrf_lpcomp_int_enable(uint32_t int_mask)
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{
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NRF_LPCOMP->INTENSET = int_mask;
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}
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__STATIC_INLINE void nrf_lpcomp_int_disable(uint32_t int_mask)
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{
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NRF_LPCOMP->INTENCLR = int_mask;
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}
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__STATIC_INLINE bool nrf_lpcomp_int_enable_check(uint32_t int_mask)
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{
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return (NRF_LPCOMP->INTENSET & int_mask); // when read this register will return the value of INTEN.
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}
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__STATIC_INLINE uint32_t * nrf_lpcomp_task_address_get(nrf_lpcomp_task_t task)
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{
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return (uint32_t *)((uint8_t *)NRF_LPCOMP + task);
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}
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__STATIC_INLINE uint32_t * nrf_lpcomp_event_address_get(nrf_lpcomp_event_t event)
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{
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return (uint32_t *)((uint8_t *)NRF_LPCOMP + event);
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}
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__STATIC_INLINE void nrf_lpcomp_shorts_enable(uint32_t short_mask)
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{
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NRF_LPCOMP->SHORTS |= short_mask;
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}
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__STATIC_INLINE void nrf_lpcomp_shorts_disable(uint32_t short_mask)
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{
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|
NRF_LPCOMP->SHORTS &= ~short_mask;
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|
}
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__STATIC_INLINE void nrf_lpcomp_task_trigger(nrf_lpcomp_task_t task)
|
|
{
|
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*( (volatile uint32_t *)( (uint8_t *)NRF_LPCOMP + (uint32_t)task) ) = 1;
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|
}
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|
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__STATIC_INLINE void nrf_lpcomp_event_clear(nrf_lpcomp_event_t event)
|
|
{
|
|
*( (volatile uint32_t *)( (uint8_t *)NRF_LPCOMP + (uint32_t)event) ) = 0;
|
|
#if __CORTEX_M == 0x04
|
|
volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)NRF_LPCOMP + (uint32_t)event));
|
|
(void)dummy;
|
|
#endif
|
|
}
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|
|
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__STATIC_INLINE bool nrf_lpcomp_event_check(nrf_lpcomp_event_t event)
|
|
{
|
|
return (bool) (*(volatile uint32_t *)( (uint8_t *)NRF_LPCOMP + (uint32_t)event));
|
|
}
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|
|
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#endif // SUPPRESS_INLINE_IMPLEMENTATION
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|
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/** @} */
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|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
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|
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#endif // NRF_LPCOMP_H_
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