401 lines
13 KiB
C
401 lines
13 KiB
C
/*
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* Copyright (c) 2016, 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_RTWDOG_H_
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#define _FSL_RTWDOG_H_
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#include "fsl_common.h"
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/*!
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* @addtogroup rtwdog
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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 Unlock sequence */
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/*@{*/
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#define WDOG_FIRST_WORD_OF_UNLOCK (RTWDOG_UPDATE_KEY & 0xFFFFU) /*!< First word of unlock sequence */
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#define WDOG_SECOND_WORD_OF_UNLOCK ((RTWDOG_UPDATE_KEY >> 16U)& 0xFFFFU) /*!< Second word of unlock sequence */
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/*@}*/
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/*! @name Refresh sequence */
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/*@{*/
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#define WDOG_FIRST_WORD_OF_REFRESH (RTWDOG_REFRESH_KEY & 0xFFFFU) /*!< First word of refresh sequence */
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#define WDOG_SECOND_WORD_OF_REFRESH ((RTWDOG_REFRESH_KEY >> 16U)& 0xFFFFU) /*!< Second word of refresh sequence */
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/*@}*/
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/*! @name Driver version */
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/*@{*/
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/*! @brief RTWDOG driver version 2.0.0. */
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#define FSL_RTWDOG_DRIVER_VERSION (MAKE_VERSION(2, 0, 0))
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/*@}*/
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/*! @brief Describes RTWDOG clock source. */
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typedef enum _rtwdog_clock_source
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{
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kRTWDOG_ClockSource0 = 0U, /*!< Clock source 0 */
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kRTWDOG_ClockSource1 = 1U, /*!< Clock source 1 */
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kRTWDOG_ClockSource2 = 2U, /*!< Clock source 2 */
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kRTWDOG_ClockSource3 = 3U, /*!< Clock source 3 */
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} rtwdog_clock_source_t;
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/*! @brief Describes the selection of the clock prescaler. */
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typedef enum _rtwdog_clock_prescaler
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{
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kRTWDOG_ClockPrescalerDivide1 = 0x0U, /*!< Divided by 1 */
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kRTWDOG_ClockPrescalerDivide256 = 0x1U, /*!< Divided by 256 */
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} rtwdog_clock_prescaler_t;
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/*! @brief Defines RTWDOG work mode. */
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typedef struct _rtwdog_work_mode
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{
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bool enableWait; /*!< Enables or disables RTWDOG in wait mode */
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bool enableStop; /*!< Enables or disables RTWDOG in stop mode */
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bool enableDebug; /*!< Enables or disables RTWDOG in debug mode */
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} rtwdog_work_mode_t;
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/*! @brief Describes RTWDOG test mode. */
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typedef enum _rtwdog_test_mode
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{
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kRTWDOG_TestModeDisabled = 0U, /*!< Test Mode disabled */
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kRTWDOG_UserModeEnabled = 1U, /*!< User Mode enabled */
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kRTWDOG_LowByteTest = 2U, /*!< Test Mode enabled, only low byte is used */
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kRTWDOG_HighByteTest = 3U, /*!< Test Mode enabled, only high byte is used */
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} rtwdog_test_mode_t;
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/*! @brief Describes RTWDOG configuration structure. */
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typedef struct _rtwdog_config
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{
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bool enableRtwdog; /*!< Enables or disables RTWDOG */
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rtwdog_clock_source_t clockSource; /*!< Clock source select */
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rtwdog_clock_prescaler_t prescaler; /*!< Clock prescaler value */
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rtwdog_work_mode_t workMode; /*!< Configures RTWDOG work mode in debug stop and wait mode */
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rtwdog_test_mode_t testMode; /*!< Configures RTWDOG test mode */
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bool enableUpdate; /*!< Update write-once register enable */
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bool enableInterrupt; /*!< Enables or disables RTWDOG interrupt */
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bool enableWindowMode; /*!< Enables or disables RTWDOG window mode */
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uint16_t windowValue; /*!< Window value */
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uint16_t timeoutValue; /*!< Timeout value */
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} rtwdog_config_t;
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/*!
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* @brief RTWDOG interrupt configuration structure.
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*
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* This structure contains the settings for all of the RTWDOG interrupt configurations.
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*/
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enum _rtwdog_interrupt_enable_t
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{
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kRTWDOG_InterruptEnable = RTWDOG_CS_INT_MASK, /*!< Interrupt is generated before forcing a reset */
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};
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/*!
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* @brief RTWDOG status flags.
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*
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* This structure contains the RTWDOG status flags for use in the RTWDOG functions.
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*/
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enum _rtwdog_status_flags_t
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{
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kRTWDOG_RunningFlag = RTWDOG_CS_EN_MASK, /*!< Running flag, set when RTWDOG is enabled */
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kRTWDOG_InterruptFlag = RTWDOG_CS_FLG_MASK, /*!< Interrupt flag, set when interrupt occurs */
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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 RTWDOG Initialization and De-initialization
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* @{
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*/
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/*!
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* @brief Initializes the RTWDOG configuration structure.
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*
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* This function initializes the RTWDOG configuration structure to default values. The default
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* values are:
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* @code
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* rtwdogConfig->enableRtwdog = true;
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* rtwdogConfig->clockSource = kRTWDOG_ClockSource1;
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* rtwdogConfig->prescaler = kRTWDOG_ClockPrescalerDivide1;
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* rtwdogConfig->workMode.enableWait = true;
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* rtwdogConfig->workMode.enableStop = false;
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* rtwdogConfig->workMode.enableDebug = false;
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* rtwdogConfig->testMode = kRTWDOG_TestModeDisabled;
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* rtwdogConfig->enableUpdate = true;
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* rtwdogConfig->enableInterrupt = false;
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* rtwdogConfig->enableWindowMode = false;
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* rtwdogConfig->windowValue = 0U;
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* rtwdogConfig->timeoutValue = 0xFFFFU;
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* @endcode
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*
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* @param config Pointer to the RTWDOG configuration structure.
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* @see rtwdog_config_t
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*/
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void RTWDOG_GetDefaultConfig(rtwdog_config_t *config);
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/*!
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* @brief Initializes the RTWDOG module.
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*
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* This function initializes the RTWDOG.
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* To reconfigure the RTWDOG without forcing a reset first, enableUpdate must be set to true
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* in the configuration.
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*
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* Example:
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* @code
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* rtwdog_config_t config;
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* RTWDOG_GetDefaultConfig(&config);
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* config.timeoutValue = 0x7ffU;
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* config.enableUpdate = true;
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* RTWDOG_Init(wdog_base,&config);
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* @endcode
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*
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* @param base RTWDOG peripheral base address.
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* @param config The configuration of the RTWDOG.
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*/
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void RTWDOG_Init(RTWDOG_Type *base, const rtwdog_config_t *config);
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/*!
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* @brief De-initializes the RTWDOG module.
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*
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* This function shuts down the RTWDOG.
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* Ensure that the WDOG_CS.UPDATE is 1, which means that the register update is enabled.
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*
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* @param base RTWDOG peripheral base address.
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*/
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void RTWDOG_Deinit(RTWDOG_Type *base);
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/* @} */
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/*!
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* @name RTWDOG functional Operation
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* @{
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*/
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/*!
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* @brief Enables the RTWDOG module.
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*
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* This function writes a value into the WDOG_CS register to enable the RTWDOG.
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* The WDOG_CS register is a write-once register. Ensure that the WCT window is still open and
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* this register has not been written in this WCT while the function is called.
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*
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* @param base RTWDOG peripheral base address.
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*/
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static inline void RTWDOG_Enable(RTWDOG_Type *base)
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{
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base->CS |= RTWDOG_CS_EN_MASK;
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}
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/*!
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* @brief Disables the RTWDOG module.
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*
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* This function writes a value into the WDOG_CS register to disable the RTWDOG.
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* The WDOG_CS register is a write-once register. Ensure that the WCT window is still open and
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* this register has not been written in this WCT while the function is called.
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*
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* @param base RTWDOG peripheral base address
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*/
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static inline void RTWDOG_Disable(RTWDOG_Type *base)
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{
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base->CS &= ~RTWDOG_CS_EN_MASK;
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}
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/*!
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* @brief Enables the RTWDOG interrupt.
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*
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* This function writes a value into the WDOG_CS register to enable the RTWDOG interrupt.
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* The WDOG_CS register is a write-once register. Ensure that the WCT window is still open and
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* this register has not been written in this WCT while the function is called.
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*
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* @param base RTWDOG peripheral base address.
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* @param mask The interrupts to enable.
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* The parameter can be a combination of the following source if defined:
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* @arg kRTWDOG_InterruptEnable
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*/
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static inline void RTWDOG_EnableInterrupts(RTWDOG_Type *base, uint32_t mask)
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{
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base->CS |= mask;
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}
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/*!
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* @brief Disables the RTWDOG interrupt.
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*
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* This function writes a value into the WDOG_CS register to disable the RTWDOG interrupt.
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* The WDOG_CS register is a write-once register. Ensure that the WCT window is still open and
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* this register has not been written in this WCT while the function is called.
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*
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* @param base RTWDOG peripheral base address.
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* @param mask The interrupts to disabled.
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* The parameter can be a combination of the following source if defined:
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* @arg kRTWDOG_InterruptEnable
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*/
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static inline void RTWDOG_DisableInterrupts(RTWDOG_Type *base, uint32_t mask)
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{
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base->CS &= ~mask;
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}
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/*!
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* @brief Gets the RTWDOG 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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* Example to get the running flag:
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* @code
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* uint32_t status;
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* status = RTWDOG_GetStatusFlags(wdog_base) & kRTWDOG_RunningFlag;
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* @endcode
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* @param base RTWDOG peripheral base address
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* @return State of the status flag: asserted (true) or not-asserted (false). @see _rtwdog_status_flags_t
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* - true: related status flag has been set.
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* - false: related status flag is not set.
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*/
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static inline uint32_t RTWDOG_GetStatusFlags(RTWDOG_Type *base)
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{
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return (base->CS & (RTWDOG_CS_EN_MASK | RTWDOG_CS_FLG_MASK));
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}
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/*!
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* @brief Clears the RTWDOG flag.
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*
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* This function clears the RTWDOG status flag.
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*
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* Example to clear an interrupt flag:
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* @code
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* RTWDOG_ClearStatusFlags(wdog_base,kRTWDOG_InterruptFlag);
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* @endcode
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* @param base RTWDOG peripheral base address.
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* @param mask The status flags to clear.
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* The parameter can be any combination of the following values:
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* @arg kRTWDOG_InterruptFlag
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*/
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void RTWDOG_ClearStatusFlags(RTWDOG_Type *base, uint32_t mask);
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/*!
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* @brief Sets the RTWDOG timeout value.
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*
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* This function writes a timeout value into the WDOG_TOVAL register.
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* The WDOG_TOVAL register is a write-once register. Ensure that the WCT window is still open and
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* this register has not been written in this WCT while the function is called.
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*
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* @param base RTWDOG peripheral base address
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* @param timeoutCount RTWDOG timeout value, count of RTWDOG clock ticks.
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*/
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static inline void RTWDOG_SetTimeoutValue(RTWDOG_Type *base, uint16_t timeoutCount)
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{
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base->TOVAL = timeoutCount;
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}
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/*!
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* @brief Sets the RTWDOG window value.
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*
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* This function writes a window value into the WDOG_WIN register.
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* The WDOG_WIN register is a write-once register. Ensure that the WCT window is still open and
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* this register has not been written in this WCT while the function is called.
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*
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* @param base RTWDOG peripheral base address.
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* @param windowValue RTWDOG window value.
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*/
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static inline void RTWDOG_SetWindowValue(RTWDOG_Type *base, uint16_t windowValue)
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{
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base->WIN = windowValue;
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}
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/*!
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* @brief Unlocks the RTWDOG register written.
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*
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* This function unlocks the RTWDOG register written.
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*
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* Before starting the unlock sequence and following the configuration, disable the global interrupts.
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* Otherwise, an interrupt could effectively invalidate the unlock sequence and the WCT may expire.
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* After the configuration finishes, re-enable the global interrupts.
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*
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* @param base RTWDOG peripheral base address
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*/
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static inline void RTWDOG_Unlock(RTWDOG_Type *base)
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{
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if ((base->CS) & RTWDOG_CS_CMD32EN_MASK)
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{
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base->CNT = RTWDOG_UPDATE_KEY;
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}
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else
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{
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base->CNT = WDOG_FIRST_WORD_OF_UNLOCK;
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base->CNT = WDOG_SECOND_WORD_OF_UNLOCK;
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}
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}
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/*!
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* @brief Refreshes the RTWDOG timer.
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*
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* This function feeds the RTWDOG.
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* This function should be called before the Watchdog timer is in timeout. Otherwise, a reset is asserted.
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*
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* @param base RTWDOG peripheral base address
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*/
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static inline void RTWDOG_Refresh(RTWDOG_Type *base)
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{
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if ((base->CS) & RTWDOG_CS_CMD32EN_MASK)
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{
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base->CNT = RTWDOG_REFRESH_KEY;
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}
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else
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{
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base->CNT = WDOG_FIRST_WORD_OF_REFRESH;
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base->CNT = WDOG_SECOND_WORD_OF_REFRESH;
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}
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}
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/*!
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* @brief Gets the RTWDOG counter value.
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*
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* This function gets the RTWDOG counter value.
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*
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* @param base RTWDOG peripheral base address.
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* @return Current RTWDOG counter value.
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*/
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static inline uint16_t RTWDOG_GetCounterValue(RTWDOG_Type *base)
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{
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return base->CNT;
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}
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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_RTWDOG_H_ */
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