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Diffstat (limited to 'drivers/include/fsl_wdog.h')
| -rw-r--r-- | drivers/include/fsl_wdog.h | 433 |
1 files changed, 433 insertions, 0 deletions
diff --git a/drivers/include/fsl_wdog.h b/drivers/include/fsl_wdog.h new file mode 100644 index 0000000..580adb9 --- /dev/null +++ b/drivers/include/fsl_wdog.h @@ -0,0 +1,433 @@ +/* + * 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_ */ |