242 lines
7.5 KiB
C
242 lines
7.5 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o 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" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FSL_EWM_H_
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#define _FSL_EWM_H_
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#include "fsl_common.h"
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/*!
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* @addtogroup ewm
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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 EWM driver version 2.0.1. */
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#define FSL_EWM_DRIVER_VERSION (MAKE_VERSION(2, 0, 1))
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/*@}*/
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/*! @brief Describes EWM clock source. */
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#if defined(FSL_FEATURE_EWM_HAS_CLOCK_SELECT) && FSL_FEATURE_EWM_HAS_CLOCK_SELECT
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typedef enum _ewm_lpo_clock_source
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{
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kEWM_LpoClockSource0 = 0U, /*!< EWM clock sourced from lpo_clk[0]*/
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kEWM_LpoClockSource1 = 1U, /*!< EWM clock sourced from lpo_clk[1]*/
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kEWM_LpoClockSource2 = 2U, /*!< EWM clock sourced from lpo_clk[2]*/
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kEWM_LpoClockSource3 = 3U, /*!< EWM clock sourced from lpo_clk[3]*/
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} ewm_lpo_clock_source_t;
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#endif /* FSL_FEATURE_EWM_HAS_CLOCK_SELECT */
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/*!
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* @brief Data structure for EWM configuration.
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*
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* This structure is used to configure the EWM.
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*/
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typedef struct _ewm_config
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{
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bool enableEwm; /*!< Enable EWM module */
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bool enableEwmInput; /*!< Enable EWM_in input */
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bool setInputAssertLogic; /*!< EWM_in signal assertion state */
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bool enableInterrupt; /*!< Enable EWM interrupt */
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#if defined(FSL_FEATURE_EWM_HAS_CLOCK_SELECT) && FSL_FEATURE_EWM_HAS_CLOCK_SELECT
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ewm_lpo_clock_source_t clockSource; /*!< Clock source select */
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#endif /* FSL_FEATURE_EWM_HAS_CLOCK_SELECT */
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#if defined(FSL_FEATURE_EWM_HAS_PRESCALER) && FSL_FEATURE_EWM_HAS_PRESCALER
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uint8_t prescaler; /*!< Clock prescaler value */
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#endif /* FSL_FEATURE_EWM_HAS_PRESCALER */
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uint8_t compareLowValue; /*!< Compare low-register value */
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uint8_t compareHighValue; /*!< Compare high-register value */
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} ewm_config_t;
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/*!
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* @brief EWM interrupt configuration structure with default settings all disabled.
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*
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* This structure contains the settings for all of EWM interrupt configurations.
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*/
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enum _ewm_interrupt_enable_t
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{
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kEWM_InterruptEnable = EWM_CTRL_INTEN_MASK, /*!< Enable the EWM to generate an interrupt*/
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};
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/*!
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* @brief EWM status flags.
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*
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* This structure contains the constants for the EWM status flags for use in the EWM functions.
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*/
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enum _ewm_status_flags_t
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{
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kEWM_RunningFlag = EWM_CTRL_EWMEN_MASK, /*!< Running flag, set when EWM is enabled*/
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};
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/*******************************************************************************
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* API
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*******************************************************************************/
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#if defined(__cplusplus)
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extern "C" {
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#endif /* __cplusplus */
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/*!
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* @name EWM initialization and de-initialization
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* @{
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*/
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/*!
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* @brief Initializes the EWM peripheral.
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*
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* This function is used to initialize the EWM. After calling, the EWM
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* runs immediately according to the configuration.
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* Note that, except for the interrupt enable control bit, other control bits and registers are write once after a
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* CPU reset. Modifying them more than once generates a bus transfer error.
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*
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* This is an example.
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* @code
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* ewm_config_t config;
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* EWM_GetDefaultConfig(&config);
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* config.compareHighValue = 0xAAU;
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* EWM_Init(ewm_base,&config);
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* @endcode
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*
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* @param base EWM peripheral base address
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* @param config The configuration of the EWM
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*/
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void EWM_Init(EWM_Type *base, const ewm_config_t *config);
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/*!
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* @brief Deinitializes the EWM peripheral.
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*
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* This function is used to shut down the EWM.
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*
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* @param base EWM peripheral base address
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*/
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void EWM_Deinit(EWM_Type *base);
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/*!
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* @brief Initializes the EWM configuration structure.
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*
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* This function initializes the EWM configuration structure to default values. The default
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* values are as follows.
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* @code
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* ewmConfig->enableEwm = true;
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* ewmConfig->enableEwmInput = false;
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* ewmConfig->setInputAssertLogic = false;
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* ewmConfig->enableInterrupt = false;
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* ewmConfig->ewm_lpo_clock_source_t = kEWM_LpoClockSource0;
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* ewmConfig->prescaler = 0;
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* ewmConfig->compareLowValue = 0;
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* ewmConfig->compareHighValue = 0xFEU;
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* @endcode
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*
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* @param config Pointer to the EWM configuration structure.
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* @see ewm_config_t
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*/
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void EWM_GetDefaultConfig(ewm_config_t *config);
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/* @} */
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/*!
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* @name EWM functional Operation
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* @{
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*/
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/*!
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* @brief Enables the EWM interrupt.
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*
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* This function enables the EWM interrupt.
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*
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* @param base EWM peripheral base address
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* @param mask The interrupts to enable
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* The parameter can be combination of the following source if defined
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* @arg kEWM_InterruptEnable
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*/
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static inline void EWM_EnableInterrupts(EWM_Type *base, uint32_t mask)
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{
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base->CTRL |= mask;
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}
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/*!
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* @brief Disables the EWM interrupt.
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*
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* This function enables the EWM interrupt.
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*
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* @param base EWM peripheral base address
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* @param mask The interrupts to disable
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* The parameter can be combination of the following source if defined
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* @arg kEWM_InterruptEnable
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*/
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static inline void EWM_DisableInterrupts(EWM_Type *base, uint32_t mask)
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{
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base->CTRL &= ~mask;
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}
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/*!
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* @brief Gets all status flags.
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*
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* This function gets all status flags.
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*
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* This is an example for getting the running flag.
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* @code
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* uint32_t status;
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* status = EWM_GetStatusFlags(ewm_base) & kEWM_RunningFlag;
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* @endcode
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* @param base EWM peripheral base address
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* @return State of the status flag: asserted (true) or not-asserted (false).@see _ewm_status_flags_t
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* - True: a related status flag has been set.
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* - False: a related status flag is not set.
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*/
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static inline uint32_t EWM_GetStatusFlags(EWM_Type *base)
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{
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return (base->CTRL & EWM_CTRL_EWMEN_MASK);
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}
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/*!
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* @brief Services the EWM.
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*
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* This function resets the EWM counter to zero.
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*
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* @param base EWM peripheral base address
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*/
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void EWM_Refresh(EWM_Type *base);
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/*@}*/
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#if defined(__cplusplus)
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}
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#endif /* __cplusplus */
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/*! @}*/
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#endif /* _FSL_EWM_H_ */
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