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rt-thread/bsp/frdm-k64f/device/MK64F12/fsl_wdog.h

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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* Copyright 2016-2017 NXP
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _FSL_WDOG_H_
#define _FSL_WDOG_H_
#include "fsl_common.h"
/*!
* @addtogroup wdog
* @{
*/
/*******************************************************************************
* Definitions
*******************************************************************************/
/*! @name Driver version */
/*@{*/
/*! @brief Defines WDOG driver version 2.0.0. */
#define FSL_WDOG_DRIVER_VERSION (MAKE_VERSION(2, 0, 0))
/*@}*/
/*! @name Unlock sequence */
/*@{*/
#define WDOG_FIRST_WORD_OF_UNLOCK (0xC520U) /*!< First word of unlock sequence */
#define WDOG_SECOND_WORD_OF_UNLOCK (0xD928U) /*!< Second word of unlock sequence */
/*@}*/
/*! @name Refresh sequence */
/*@{*/
#define WDOG_FIRST_WORD_OF_REFRESH (0xA602U) /*!< First word of refresh sequence */
#define WDOG_SECOND_WORD_OF_REFRESH (0xB480U) /*!< Second word of refresh sequence */
/*@}*/
/*! @brief Describes WDOG clock source. */
typedef enum _wdog_clock_source
{
kWDOG_LpoClockSource = 0U, /*!< WDOG clock sourced from LPO*/
kWDOG_AlternateClockSource = 1U, /*!< WDOG clock sourced from alternate clock source*/
} wdog_clock_source_t;
/*! @brief Defines WDOG work mode. */
typedef struct _wdog_work_mode
{
#if defined(FSL_FEATURE_WDOG_HAS_WAITEN) && FSL_FEATURE_WDOG_HAS_WAITEN
bool enableWait; /*!< Enables or disables WDOG in wait mode */
#endif /* FSL_FEATURE_WDOG_HAS_WAITEN */
bool enableStop; /*!< Enables or disables WDOG in stop mode */
bool enableDebug; /*!< Enables or disables WDOG in debug mode */
} wdog_work_mode_t;
/*! @brief Describes the selection of the clock prescaler. */
typedef enum _wdog_clock_prescaler
{
kWDOG_ClockPrescalerDivide1 = 0x0U, /*!< Divided by 1 */
kWDOG_ClockPrescalerDivide2 = 0x1U, /*!< Divided by 2 */
kWDOG_ClockPrescalerDivide3 = 0x2U, /*!< Divided by 3 */
kWDOG_ClockPrescalerDivide4 = 0x3U, /*!< Divided by 4 */
kWDOG_ClockPrescalerDivide5 = 0x4U, /*!< Divided by 5 */
kWDOG_ClockPrescalerDivide6 = 0x5U, /*!< Divided by 6 */
kWDOG_ClockPrescalerDivide7 = 0x6U, /*!< Divided by 7 */
kWDOG_ClockPrescalerDivide8 = 0x7U, /*!< Divided by 8 */
} wdog_clock_prescaler_t;
/*! @brief Describes WDOG configuration structure. */
typedef struct _wdog_config
{
bool enableWdog; /*!< Enables or disables WDOG */
wdog_clock_source_t clockSource; /*!< Clock source select */
wdog_clock_prescaler_t prescaler; /*!< Clock prescaler value */
wdog_work_mode_t workMode; /*!< Configures WDOG work mode in debug stop and wait mode */
bool enableUpdate; /*!< Update write-once register enable */
bool enableInterrupt; /*!< Enables or disables WDOG interrupt */
bool enableWindowMode; /*!< Enables or disables WDOG window mode */
uint32_t windowValue; /*!< Window value */
uint32_t timeoutValue; /*!< Timeout value */
} wdog_config_t;
/*! @brief Describes WDOG test mode. */
typedef enum _wdog_test_mode
{
kWDOG_QuickTest = 0U, /*!< Selects quick test */
kWDOG_ByteTest = 1U, /*!< Selects byte test */
} wdog_test_mode_t;
/*! @brief Describes WDOG tested byte selection in byte test mode. */
typedef enum _wdog_tested_byte
{
kWDOG_TestByte0 = 0U, /*!< Byte 0 selected in byte test mode */
kWDOG_TestByte1 = 1U, /*!< Byte 1 selected in byte test mode */
kWDOG_TestByte2 = 2U, /*!< Byte 2 selected in byte test mode */
kWDOG_TestByte3 = 3U, /*!< Byte 3 selected in byte test mode */
} wdog_tested_byte_t;
/*! @brief Describes WDOG test mode configuration structure. */
typedef struct _wdog_test_config
{
wdog_test_mode_t testMode; /*!< Selects test mode */
wdog_tested_byte_t testedByte; /*!< Selects tested byte in byte test mode */
uint32_t timeoutValue; /*!< Timeout value */
} wdog_test_config_t;
/*!
* @brief WDOG interrupt configuration structure, default settings all disabled.
*
* This structure contains the settings for all of the WDOG interrupt configurations.
*/
enum _wdog_interrupt_enable_t
{
kWDOG_InterruptEnable = WDOG_STCTRLH_IRQRSTEN_MASK, /*!< WDOG timeout generates an interrupt before reset*/
};
/*!
* @brief WDOG status flags.
*
* This structure contains the WDOG status flags for use in the WDOG functions.
*/
enum _wdog_status_flags_t
{
kWDOG_RunningFlag = WDOG_STCTRLH_WDOGEN_MASK, /*!< Running flag, set when WDOG is enabled*/
kWDOG_TimeoutFlag = WDOG_STCTRLL_INTFLG_MASK, /*!< Interrupt flag, set when an exception occurs*/
};
/*******************************************************************************
* API
*******************************************************************************/
#if defined(__cplusplus)
extern "C" {
#endif /* __cplusplus */
/*!
* @name WDOG Initialization and De-initialization
* @{
*/
/*!
* @brief Initializes the WDOG configuration sturcture.
*
* This function initializes the WDOG configuration structure to default values. The default
* values are as follows.
* @code
* wdogConfig->enableWdog = true;
* wdogConfig->clockSource = kWDOG_LpoClockSource;
* wdogConfig->prescaler = kWDOG_ClockPrescalerDivide1;
* wdogConfig->workMode.enableWait = true;
* wdogConfig->workMode.enableStop = false;
* wdogConfig->workMode.enableDebug = false;
* wdogConfig->enableUpdate = true;
* wdogConfig->enableInterrupt = false;
* wdogConfig->enableWindowMode = false;
* wdogConfig->windowValue = 0;
* wdogConfig->timeoutValue = 0xFFFFU;
* @endcode
*
* @param config Pointer to the WDOG configuration structure.
* @see wdog_config_t
*/
void WDOG_GetDefaultConfig(wdog_config_t *config);
/*!
* @brief Initializes the WDOG.
*
* This function initializes the WDOG. When called, the WDOG runs according to the configuration.
* To reconfigure WDOG without forcing a reset first, enableUpdate must be set to true
* in the configuration.
*
* This is an example.
* @code
* wdog_config_t config;
* WDOG_GetDefaultConfig(&config);
* config.timeoutValue = 0x7ffU;
* config.enableUpdate = true;
* WDOG_Init(wdog_base,&config);
* @endcode
*
* @param base WDOG peripheral base address
* @param config The configuration of WDOG
*/
void WDOG_Init(WDOG_Type *base, const wdog_config_t *config);
/*!
* @brief Shuts down the WDOG.
*
* This function shuts down the WDOG.
* Ensure that the WDOG_STCTRLH.ALLOWUPDATE is 1 which indicates that the register update is enabled.
*/
void WDOG_Deinit(WDOG_Type *base);
/*!
* @brief Configures the WDOG functional test.
*
* This function is used to configure the WDOG functional test. When called, the WDOG goes into test mode
* and runs according to the configuration.
* Ensure that the WDOG_STCTRLH.ALLOWUPDATE is 1 which means that the register update is enabled.
*
* This is an example.
* @code
* wdog_test_config_t test_config;
* test_config.testMode = kWDOG_QuickTest;
* test_config.timeoutValue = 0xfffffu;
* WDOG_SetTestModeConfig(wdog_base, &test_config);
* @endcode
* @param base WDOG peripheral base address
* @param config The functional test configuration of WDOG
*/
void WDOG_SetTestModeConfig(WDOG_Type *base, wdog_test_config_t *config);
/* @} */
/*!
* @name WDOG Functional Operation
* @{
*/
/*!
* @brief Enables the WDOG module.
*
* This function write value into WDOG_STCTRLH register to enable the WDOG, it is a write-once register,
* make sure that the WCT window is still open and this register has not been written in this WCT
* while this function is called.
*
* @param base WDOG peripheral base address
*/
static inline void WDOG_Enable(WDOG_Type *base)
{
base->STCTRLH |= WDOG_STCTRLH_WDOGEN_MASK;
}
/*!
* @brief Disables the WDOG module.
*
* This function writes a value into the WDOG_STCTRLH register to disable the WDOG. It is a write-once register.
* Ensure that the WCT window is still open and that register has not been written to in this WCT
* while the function is called.
*
* @param base WDOG peripheral base address
*/
static inline void WDOG_Disable(WDOG_Type *base)
{
base->STCTRLH &= ~WDOG_STCTRLH_WDOGEN_MASK;
}
/*!
* @brief Enables the WDOG interrupt.
*
* This function writes a value into the WDOG_STCTRLH register to enable the WDOG interrupt. It is a write-once register.
* Ensure that the WCT window is still open and the register has not been written to in this WCT
* while the function is called.
*
* @param base WDOG peripheral base address
* @param mask The interrupts to enable
* The parameter can be combination of the following source if defined.
* @arg kWDOG_InterruptEnable
*/
static inline void WDOG_EnableInterrupts(WDOG_Type *base, uint32_t mask)
{
base->STCTRLH |= mask;
}
/*!
* @brief Disables the WDOG interrupt.
*
* This function writes a value into the WDOG_STCTRLH register to disable the WDOG interrupt. It is a write-once register.
* Ensure that the WCT window is still open and the register has not been written to in this WCT
* while the function is called.
*
* @param base WDOG peripheral base address
* @param mask The interrupts to disable
* The parameter can be combination of the following source if defined.
* @arg kWDOG_InterruptEnable
*/
static inline void WDOG_DisableInterrupts(WDOG_Type *base, uint32_t mask)
{
base->STCTRLH &= ~mask;
}
/*!
* @brief Gets the WDOG all status flags.
*
* This function gets all status flags.
*
* This is an example for getting the Running Flag.
* @code
* uint32_t status;
* status = WDOG_GetStatusFlags (wdog_base) & kWDOG_RunningFlag;
* @endcode
* @param base WDOG peripheral base address
* @return State of the status flag: asserted (true) or not-asserted (false).@see _wdog_status_flags_t
* - true: a related status flag has been set.
* - false: a related status flag is not set.
*/
uint32_t WDOG_GetStatusFlags(WDOG_Type *base);
/*!
* @brief Clears the WDOG flag.
*
* This function clears the WDOG status flag.
*
* This is an example for clearing the timeout (interrupt) flag.
* @code
* WDOG_ClearStatusFlags(wdog_base,kWDOG_TimeoutFlag);
* @endcode
* @param base WDOG peripheral base address
* @param mask The status flags to clear.
* The parameter could be any combination of the following values.
* kWDOG_TimeoutFlag
*/
void WDOG_ClearStatusFlags(WDOG_Type *base, uint32_t mask);
/*!
* @brief Sets the WDOG timeout value.
*
* This function sets the timeout value.
* It should be ensured that the time-out value for the WDOG is always greater than
* 2xWCT time + 20 bus clock cycles.
* This function writes a value into WDOG_TOVALH and WDOG_TOVALL registers which are wirte-once.
* Ensure the WCT window is still open and the two registers have not been written to in this WCT
* while the function is called.
*
* @param base WDOG peripheral base address
* @param timeoutCount WDOG timeout value; count of WDOG clock tick.
*/
static inline void WDOG_SetTimeoutValue(WDOG_Type *base, uint32_t timeoutCount)
{
base->TOVALH = (uint16_t)((timeoutCount >> 16U) & 0xFFFFU);
base->TOVALL = (uint16_t)((timeoutCount)&0xFFFFU);
}
/*!
* @brief Sets the WDOG window value.
*
* This function sets the WDOG window value.
* This function writes a value into WDOG_WINH and WDOG_WINL registers which are wirte-once.
* Ensure the WCT window is still open and the two registers have not been written to in this WCT
* while the function is called.
*
* @param base WDOG peripheral base address
* @param windowValue WDOG window value.
*/
static inline void WDOG_SetWindowValue(WDOG_Type *base, uint32_t windowValue)
{
base->WINH = (uint16_t)((windowValue >> 16U) & 0xFFFFU);
base->WINL = (uint16_t)((windowValue)&0xFFFFU);
}
/*!
* @brief Unlocks the WDOG register written.
*
* This function unlocks the WDOG register written.
* Before starting the unlock sequence and following congfiguration, disable the global interrupts.
* Otherwise, an interrupt may invalidate the unlocking sequence and the WCT may expire.
* After the configuration finishes, re-enable the global interrupts.
*
* @param base WDOG peripheral base address
*/
static inline void WDOG_Unlock(WDOG_Type *base)
{
base->UNLOCK = WDOG_FIRST_WORD_OF_UNLOCK;
base->UNLOCK = WDOG_SECOND_WORD_OF_UNLOCK;
}
/*!
* @brief Refreshes the WDOG timer.
*
* This function feeds the WDOG.
* This function should be called before the WDOG timer is in timeout. Otherwise, a reset is asserted.
*
* @param base WDOG peripheral base address
*/
void WDOG_Refresh(WDOG_Type *base);
/*!
* @brief Gets the WDOG reset count.
*
* This function gets the WDOG reset count value.
*
* @param base WDOG peripheral base address
* @return WDOG reset count value.
*/
static inline uint16_t WDOG_GetResetCount(WDOG_Type *base)
{
return base->RSTCNT;
}
/*!
* @brief Clears the WDOG reset count.
*
* This function clears the WDOG reset count value.
*
* @param base WDOG peripheral base address
*/
static inline void WDOG_ClearResetCount(WDOG_Type *base)
{
base->RSTCNT |= UINT16_MAX;
}
/*@}*/
#if defined(__cplusplus)
}
#endif /* __cplusplus */
/*! @}*/
#endif /* _FSL_WDOG_H_ */
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