322 lines
9.6 KiB
C
322 lines
9.6 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef _FSL_CMP_H_
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#define _FSL_CMP_H_
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#include "fsl_common.h"
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/*!
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* @addtogroup cmp
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* @{
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*/
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*! @name Driver version */
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/*@{*/
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/*! @brief CMP driver version 2.0.0. */
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#define FSL_CMP_DRIVER_VERSION (MAKE_VERSION(2, 0, 0))
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/*@}*/
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/*!
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* @brief Interrupt enable/disable mask.
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*/
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enum _cmp_interrupt_enable
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{
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kCMP_OutputRisingInterruptEnable = CMP_SCR_IER_MASK, /*!< Comparator interrupt enable rising. */
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kCMP_OutputFallingInterruptEnable = CMP_SCR_IEF_MASK, /*!< Comparator interrupt enable falling. */
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};
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/*!
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* @brief Status flags' mask.
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*/
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enum _cmp_status_flags
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{
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kCMP_OutputRisingEventFlag = CMP_SCR_CFR_MASK, /*!< Rising-edge on the comparison output has occurred. */
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kCMP_OutputFallingEventFlag = CMP_SCR_CFF_MASK, /*!< Falling-edge on the comparison output has occurred. */
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kCMP_OutputAssertEventFlag = CMP_SCR_COUT_MASK, /*!< Return the current value of the analog comparator output. */
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};
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/*!
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* @brief CMP Hysteresis mode.
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*/
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typedef enum _cmp_hysteresis_mode
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{
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kCMP_HysteresisLevel0 = 0U, /*!< Hysteresis level 0. */
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kCMP_HysteresisLevel1 = 1U, /*!< Hysteresis level 1. */
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kCMP_HysteresisLevel2 = 2U, /*!< Hysteresis level 2. */
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kCMP_HysteresisLevel3 = 3U, /*!< Hysteresis level 3. */
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} cmp_hysteresis_mode_t;
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/*!
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* @brief CMP Voltage Reference source.
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*/
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typedef enum _cmp_reference_voltage_source
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{
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kCMP_VrefSourceVin1 = 0U, /*!< Vin1 is selected as a resistor ladder network supply reference Vin. */
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kCMP_VrefSourceVin2 = 1U, /*!< Vin2 is selected as a resistor ladder network supply reference Vin. */
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} cmp_reference_voltage_source_t;
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/*!
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* @brief Configures the comparator.
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*/
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typedef struct _cmp_config
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{
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bool enableCmp; /*!< Enable the CMP module. */
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cmp_hysteresis_mode_t hysteresisMode; /*!< CMP Hysteresis mode. */
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bool enableHighSpeed; /*!< Enable High-speed (HS) comparison mode. */
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bool enableInvertOutput; /*!< Enable the inverted comparator output. */
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bool useUnfilteredOutput; /*!< Set the compare output(COUT) to equal COUTA(true) or COUT(false). */
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bool enablePinOut; /*!< The comparator output is available on the associated pin. */
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#if defined(FSL_FEATURE_CMP_HAS_TRIGGER_MODE) && FSL_FEATURE_CMP_HAS_TRIGGER_MODE
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bool enableTriggerMode; /*!< Enable the trigger mode. */
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#endif /* FSL_FEATURE_CMP_HAS_TRIGGER_MODE */
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} cmp_config_t;
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/*!
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* @brief Configures the filter.
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*/
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typedef struct _cmp_filter_config
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{
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#if defined(FSL_FEATURE_CMP_HAS_EXTERNAL_SAMPLE_SUPPORT) && FSL_FEATURE_CMP_HAS_EXTERNAL_SAMPLE_SUPPORT
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bool enableSample; /*!< Using the external SAMPLE as a sampling clock input or using a divided bus clock. */
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#endif /* FSL_FEATURE_CMP_HAS_EXTERNAL_SAMPLE_SUPPORT */
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uint8_t filterCount; /*!< Filter Sample Count. Available range is 1-7; 0 disables the filter.*/
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uint8_t filterPeriod; /*!< Filter Sample Period. The divider to the bus clock. Available range is 0-255. */
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} cmp_filter_config_t;
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/*!
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* @brief Configures the internal DAC.
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*/
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typedef struct _cmp_dac_config
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{
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cmp_reference_voltage_source_t referenceVoltageSource; /*!< Supply voltage reference source. */
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uint8_t DACValue; /*!< Value for the DAC Output Voltage. Available range is 0-63.*/
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} cmp_dac_config_t;
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/*******************************************************************************
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* API
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******************************************************************************/
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/*!
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* @name Initialization
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* @{
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*/
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/*!
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* @brief Initializes the CMP.
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*
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* This function initializes the CMP module. The operations included are as follows.
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* - Enabling the clock for CMP module.
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* - Configuring the comparator.
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* - Enabling the CMP module.
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* Note that for some devices, multiple CMP instances share the same clock gate. In this case, to enable the clock for
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* any instance enables all CMPs. See the appropriate MCU reference manual for the clock assignment of the CMP.
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*
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* @param base CMP peripheral base address.
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* @param config Pointer to the configuration structure.
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*/
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void CMP_Init(CMP_Type *base, const cmp_config_t *config);
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/*!
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* @brief De-initializes the CMP module.
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*
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* This function de-initializes the CMP module. The operations included are as follows.
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* - Disabling the CMP module.
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* - Disabling the clock for CMP module.
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*
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* This function disables the clock for the CMP.
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* Note that for some devices, multiple CMP instances share the same clock gate. In this case, before disabling the
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* clock for the CMP, ensure that all the CMP instances are not used.
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*
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* @param base CMP peripheral base address.
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*/
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void CMP_Deinit(CMP_Type *base);
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/*!
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* @brief Enables/disables the CMP module.
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*
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* @param base CMP peripheral base address.
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* @param enable Enables or disables the module.
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*/
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static inline void CMP_Enable(CMP_Type *base, bool enable)
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{
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if (enable)
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{
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base->CR1 |= CMP_CR1_EN_MASK;
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}
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else
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{
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base->CR1 &= ~CMP_CR1_EN_MASK;
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}
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}
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/*!
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* @brief Initializes the CMP user configuration structure.
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*
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* This function initializes the user configuration structure to these default values.
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* @code
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* config->enableCmp = true;
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* config->hysteresisMode = kCMP_HysteresisLevel0;
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* config->enableHighSpeed = false;
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* config->enableInvertOutput = false;
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* config->useUnfilteredOutput = false;
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* config->enablePinOut = false;
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* config->enableTriggerMode = false;
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* @endcode
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* @param config Pointer to the configuration structure.
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*/
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void CMP_GetDefaultConfig(cmp_config_t *config);
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/*!
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* @brief Sets the input channels for the comparator.
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*
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* This function sets the input channels for the comparator.
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* Note that two input channels cannot be set the same way in the application. When the user selects the same input
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* from the analog mux to the positive and negative port, the comparator is disabled automatically.
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*
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* @param base CMP peripheral base address.
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* @param positiveChannel Positive side input channel number. Available range is 0-7.
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* @param negativeChannel Negative side input channel number. Available range is 0-7.
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*/
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void CMP_SetInputChannels(CMP_Type *base, uint8_t positiveChannel, uint8_t negativeChannel);
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/* @} */
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/*!
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* @name Advanced Features
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* @{
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*/
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#if defined(FSL_FEATURE_CMP_HAS_DMA) && FSL_FEATURE_CMP_HAS_DMA
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/*!
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* @brief Enables/disables the DMA request for rising/falling events.
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*
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* This function enables/disables the DMA request for rising/falling events. Either event triggers the generation of
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* the DMA request from CMP if the DMA feature is enabled. Both events are ignored for generating the DMA request from the CMP
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* if the DMA is disabled.
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*
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* @param base CMP peripheral base address.
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* @param enable Enables or disables the feature.
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*/
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void CMP_EnableDMA(CMP_Type *base, bool enable);
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#endif /* FSL_FEATURE_CMP_HAS_DMA */
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#if defined(FSL_FEATURE_CMP_HAS_WINDOW_MODE) && FSL_FEATURE_CMP_HAS_WINDOW_MODE
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/*!
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* @brief Enables/disables the window mode.
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*
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* @param base CMP peripheral base address.
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* @param enable Enables or disables the feature.
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*/
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static inline void CMP_EnableWindowMode(CMP_Type *base, bool enable)
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{
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if (enable)
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{
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base->CR1 |= CMP_CR1_WE_MASK;
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}
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else
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{
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base->CR1 &= ~CMP_CR1_WE_MASK;
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}
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}
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#endif /* FSL_FEATURE_CMP_HAS_WINDOW_MODE */
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#if defined(FSL_FEATURE_CMP_HAS_PASS_THROUGH_MODE) && FSL_FEATURE_CMP_HAS_PASS_THROUGH_MODE
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/*!
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* @brief Enables/disables the pass through mode.
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*
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* @param base CMP peripheral base address.
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* @param enable Enables or disables the feature.
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*/
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static inline void CMP_EnablePassThroughMode(CMP_Type *base, bool enable)
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{
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if (enable)
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{
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base->MUXCR |= CMP_MUXCR_PSTM_MASK;
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}
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else
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{
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base->MUXCR &= ~CMP_MUXCR_PSTM_MASK;
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}
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}
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#endif /* FSL_FEATURE_CMP_HAS_PASS_THROUGH_MODE */
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/*!
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* @brief Configures the filter.
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*
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* @param base CMP peripheral base address.
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* @param config Pointer to the configuration structure.
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*/
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void CMP_SetFilterConfig(CMP_Type *base, const cmp_filter_config_t *config);
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/*!
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* @brief Configures the internal DAC.
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*
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* @param base CMP peripheral base address.
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* @param config Pointer to the configuration structure. "NULL" disables the feature.
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*/
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void CMP_SetDACConfig(CMP_Type *base, const cmp_dac_config_t *config);
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/*!
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* @brief Enables the interrupts.
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*
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* @param base CMP peripheral base address.
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* @param mask Mask value for interrupts. See "_cmp_interrupt_enable".
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*/
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void CMP_EnableInterrupts(CMP_Type *base, uint32_t mask);
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/*!
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* @brief Disables the interrupts.
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*
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* @param base CMP peripheral base address.
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* @param mask Mask value for interrupts. See "_cmp_interrupt_enable".
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*/
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void CMP_DisableInterrupts(CMP_Type *base, uint32_t mask);
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/* @} */
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/*!
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* @name Results
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* @{
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*/
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/*!
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* @brief Gets the status flags.
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*
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* @param base CMP peripheral base address.
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*
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* @return Mask value for the asserted flags. See "_cmp_status_flags".
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*/
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uint32_t CMP_GetStatusFlags(CMP_Type *base);
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/*!
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* @brief Clears the status flags.
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*
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* @param base CMP peripheral base address.
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* @param mask Mask value for the flags. See "_cmp_status_flags".
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*/
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void CMP_ClearStatusFlags(CMP_Type *base, uint32_t mask);
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/* @} */
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#if defined(__cplusplus)
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}
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#endif
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/*!
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* @}
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*/
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#endif /* _FSL_CMP_H_ */
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