23.1 片上看门狗规格23.1.1 看门狗时钟看门狗模块有以下几个可选的时钟源    •内部低功耗振荡器（LPO_CLK）    •内部低速IRC时钟（SIRC）    •系统振荡器时钟（SOSC）    •总线时钟    注意：对于安全应用，WDOG应该在不同于CMU的时钟上运行。WDOG_CNT重置读取值可以根据时间戳而变化，因为它是一个默认运行计数器。23.1.2看门狗低功耗模式此表显示wdog低功耗模式和相应的芯片低功耗模式。此设备不支持等待模式。有关可用电源模式的详细信息，请参阅可用低功耗模式中的模块操作。23.1.3默认的看门狗超时超时取决于看门狗时钟源计数器。在该看门狗上的初始电源被lpo128k_CLK时钟锁定后，将在1024个周期后发出超时。这将导致在大约8 ms之后生成看门狗超时，这将迫使MCU重新安装。为了避免这种情况，请确保在1024周期过去之前配置或刷新该看门狗。 23.2 介绍         看门狗定时器模块是一个可供系统使用独立的定时器。它提供了一个安全特性，以确保软件按计划执行，并且CPU不会卡在无限循环中或执行意外的代码。如果在一定时间内没有执行(刷新)wdog模块，它会复位MCU。23.2.1 特征WDOG模块的功能包括：•独立于总线时钟的可配置时钟源输入        •总线时钟        •LPO时钟        •INTCLK（内部时钟）        •ERCLK（外部参考时钟）•可编程超时时间        •可编程16位超时值        •当需要更长的超时周期时，可选固定256时钟预分频器•用于计数器刷新写入序列        •刷新写入0xA602然后写入0xB480的顺序•可选窗口模式选项        •可编程16位窗口值总线•提供可靠的检查，确保程序流程快于预期        •提前刷新尝试会触发复位。•可选的超时中断，允许进行后处理诊断•具有中断向量的CPU对中断服务程序（ISR）的中断请求         •中断向量提取后，强制复位发生128个总线时钟。•配置位在复位后进行一次写入，以确保不会错误地更改看门狗配置。•强大的写序列，用于解锁一次写入配置位 •解锁写入0xC520和0xD928的序列，以允许更新一次写入配置位•软件必须在解锁后和WDOG关闭解锁窗口之前的128个总线时钟内进行更新。 23.2.2 方框图下图显示了WDOG模块的框图。23.5应用23.5.1 禁用看门狗要看门狗，首先执行解锁序列，然后取消wdogcs[en]位。下面的代码片段显示了32位写入的示例。DisableInterrupts; // disable global interrupt WDOG_CNT = 0xD928C520; //unlockwatchdog WDOG_CS &= ~WDOG_CS_EN_MASK; //disable watchdog EnableInterrupts; //enable globalinterrupt23.5.2 复位后禁用看门狗所有的看门狗寄存器都通过复位解除锁定。因此，解锁序列是不必要的，但它需要写所有的看门狗寄存器，使新的配置生效。下面的代码片段显示了复位后禁用看门狗的示例。DisableInterrupts; //disable global interrupt WDOG_CS &= ~WDOG_CS_EN_MASK; // disable watchdog WDOG_TOVAL= 0xFFFF; while(WDOG_CS[ULK]); // waitingfor lock while(~WDOG_CS[RCS]); // waiting fornew configuration to take effect EnableInterrupts; // enable globalinterrupt23.5.3 配置看门狗通过设置wdogcs[UPDATE]=0可以对看门狗进行一次配置。在此之后，该看门狗在重新配置之前无法重新配置。如果在配置该看门狗时设置了wdogcs[update]=1，则可以在不强制重新配置的情况下重新配置该看门狗。下面的示例代码演示了如何在没有窗口模式的情况下配置该看门狗，时钟源为lpo、启用中断和超时值为256 clock。下面的代码段显示了32位写入的示例。Configure onceDisableInterrupts; // disable global interrupt WDOG_CNT = 0xD928C520; //unlock watchdog while(WDOG_CS[ULK]==0); //wait untilregisters are unlocked WDOG_TOVAL = 256; //set timeout value WDOG_CS = WDOG_CS_EN(1) | WDOG_CS_CLK(1)| WDOG_CS_INT(1) | WDOG_CS_WIN(0) | WDOG_CS_UPDATE(0); while(WDOG_CS[RCS]==0); //wait until new configuration takes effect EnableInterrupts; //enable global interruptConfigure forreconfigurableDisableInterrupts; //disable global interrupt WDOG_CNT = 0xD928C520;                 //unlock watchdog while(WDOG_CS[ULK]==0);             //wait until registers are unlocked WDOG_TOVAL = 256;          //set timeout value WDOG_CS = WDOG_CS_EN(1) | WDOG_CS_CLK(1)| WDOG_CS_INT(1) | WDOG_CS_WIN(0) | WDOG_CS_UPDATE(1); while(WDOG_CS[RCS]==0);             //wait until new configuration takeseffect EnableInterrupts; //enable global interrupt23.5.4 刷新看门狗若要刷新看门狗并将看门狗计数器重置为零，则需要刷新序列。下面的代码片段显示了32位写入的示例。DisableInterrupts; // disable globalinterrupt WDOG_CNT = 0xB480A602; // refresh watchdog EnableInterrupts; // enable global interrupt
/*** @file Wdg_PBCfg.c * @version 1.0.0 * @brief AUTOSAR Wdg - contains the data exported by the watchodg module * @details Contains the information that will be exported by the module, as requested by Autosar. * * @addtogroup Wdg * @{ */ /*================================================================================================== * Project : AUTOSAR 4.2 MCAL * Platform : ARM * Peripheral : Wdog * Dependencies : none * * Autosar Version : 4.2.2 * Autosar Revision : ASR_REL_4_2_REV_0002 * Autosar Conf.Variant : * SW Version : 1.0.0 * Build Version : S32K14x_MCAL_1_0_0_RTM_ASR_REL_4_2_REV_0002_20170824 * * (c) Copyright 2006-2016 Freescale Semiconductor, Inc. * Copyright 2017 NXP * All Rights Reserved. ==================================================================================================*/ /*================================================================================================== ==================================================================================================*/ #ifdef __cplusplus extern "C"{ #endif /** * @page misra_violations MISRA-C:2004 violations * * @section Wdg_PBcfg_c_REF_1 * Violates MISRA 2004 Required Rule 19.15, Precautions shall be taken in order to * prevent the contents of a header file being included twice. All header files are * protected against multiple inclusions. * * @section Wdg_PBcfg_c_REF_2 * Violates MISRA 2004 Required Rule 1.4, The compiler/linker shall be checked to ensure * that 31 character significance and case sensitivity are supported for external identifiers. * The defines are validated. * * @section Wdg_PBcfg_c_REF_3 * Violates MISRA 2004 Required Rule 8.10, All declarations and definitions of objects or * functions at file scope shall have internal linkage unless external linkage is required. * The functions/variables are part of external configuration * * @section Wdg_PBcfg_c_REF_4 * Violates MISRA 2004 Advisory Rule 19.1, only preprocessor statements * and comments before '#include'. This is an Autosar requirement about * the memory management (Autosar requirement MEMMAP003). * @section [global] * Violates MISRA 2004 Required Rule 5.1, Identifiers (internal and external) shall not rely * on the significance of more than 31 characters. The used compilers use more than 31 chars * for identifiers. */ /*================================================================================================== * INCLUDE FILES * 1) system and project includes * 2) needed interfaces from external units * 3) internal and external interfaces from this unit ==================================================================================================*/ /** * @file Wdg_PBCfg.c */ #include "Wdg_Channel.h" #if (WDG_TYPE == WDG_INTERNAL_MODULE) #include "Reg_eSys_Wdog_defines.h" #endif #if (WDG_INSTANCE0 == STD_ON) /*================================================================================================== * SOURCE FILE VERSION INFORMATION ==================================================================================================*/ /** * @file Wdg_PBCfg.c */ #define WDG_VENDOR_ID_PBCFG_C 43 #define WDG_AR_RELEASE_MAJOR_VERSION_PBCFG_C 4 #define WDG_AR_RELEASE_MINOR_VERSION_PBCFG_C 2 /** @violates @ref Wdg_PBcfg_c_REF_2 MISRA 2004 Rule 1.4, The compiler/linker shall be checked to ensure * that 31 character significance and case sensitivity are supported for external identifiers. */ #define WDG_AR_RELEASE_REVISION_VERSION_PBCFG_C 2 #define WDG_SW_MAJOR_VERSION_PBCFG_C 1 #define WDG_SW_MINOR_VERSION_PBCFG_C 0 #define WDG_SW_PATCH_VERSION_PBCFG_C 0 /*================================================================================================== * FILE VERSION CHECKS ==================================================================================================*/ /* Check if current file and Wdg header file are of the same vendor */ #if (WDG_VENDOR_ID_PBCFG_C != WDG_CHANNEL_VENDOR_ID) #error "Wdg_PBCfg.c and Wdg_Channel.h have different vendor ids" #endif /* Check if source file and Wdg header file are of the same Autosar version */ #if ((WDG_AR_RELEASE_MAJOR_VERSION_PBCFG_C != WDG_CHANNEL_AR_RELEASE_MAJOR_VERSION) || (WDG_AR_RELEASE_MINOR_VERSION_PBCFG_C != WDG_CHANNEL_AR_RELEASE_MINOR_VERSION) || (WDG_AR_RELEASE_REVISION_VERSION_PBCFG_C != WDG_CHANNEL_AR_RELEASE_REVISION_VERSION)) #error "AutoSar Version Numbers of Wdg_PBCfg.c and Wdg_Channel.h are different" #endif /* Check if source file and Wdg header file are of the same Software version */ #if ((WDG_SW_MAJOR_VERSION_PBCFG_C != WDG_CHANNEL_SW_MAJOR_VERSION) || (WDG_SW_MINOR_VERSION_PBCFG_C != WDG_CHANNEL_SW_MINOR_VERSION) || (WDG_SW_PATCH_VERSION_PBCFG_C != WDG_CHANNEL_SW_PATCH_VERSION)) #error "Software Version Numbers of Wdg_PBCfg.c and Wdg_Channel.h are different" #endif #if (WDG_TYPE == WDG_INTERNAL_MODULE) /* Check if source file and Reg_eSys_Wdog_defines header file are of the same vendor */ #if (WDG_VENDOR_ID_PBCFG_C != REG_ESYS_WDOG_DEFINES_VENDOR_ID) #error "Wdg_PBCfg.c and Reg_eSys_Wdog_defines.h have different vendor ids" #endif /* Check if source file and Reg_eSys_Wdog_defines header file are of the same Autosar version */ #if ((WDG_AR_RELEASE_MAJOR_VERSION_PBCFG_C != REG_ESYS_WDOG_DEFINES_AR_RELEASE_MAJOR_VERSION) || (WDG_AR_RELEASE_MINOR_VERSION_PBCFG_C != REG_ESYS_WDOG_DEFINES_AR_RELEASE_MINOR_VERSION) || (WDG_AR_RELEASE_REVISION_VERSION_PBCFG_C != REG_ESYS_WDOG_DEFINES_AR_RELEASE_REVISION_VERSION)) #error "AutoSar Version Numbers of Wdg_PBCfg.c and Reg_eSys_Wdog_defines.h are different" #endif /* Check if source file and Reg_eSys_Wdog_defines header file are of the same Software version */ #if ((WDG_SW_MAJOR_VERSION_PBCFG_C != REG_ESYS_WDOG_DEFINES_SW_MAJOR_VERSION) || (WDG_SW_MINOR_VERSION_PBCFG_C != REG_ESYS_WDOG_DEFINES_SW_MINOR_VERSION) || (WDG_SW_PATCH_VERSION_PBCFG_C != REG_ESYS_WDOG_DEFINES_SW_PATCH_VERSION)) #error "Software Version Numbers of Wdg_PBCfg.c and Reg_eSys_Wdog_defines.h are different" #endif #endif /*================================================================================================== * LOCAL TYPEDEFS (STRUCTURES, UNIONS, ENUMS) ==================================================================================================*/ /*================================================================================================== * LOCAL MACROS ==================================================================================================*/ /*================================================================================================== * LOCAL CONSTANTS ==================================================================================================*/ /*================================================================================================== * LOCAL VARIABLES ==================================================================================================*/ /*================================================================================================== * GLOBAL FUNCTIONS ==================================================================================================*/ #define WDG_START_SEC_CODE /** * @brief Include Memory mapping specification * @violates @ref Wdg_PBcfg_c_REF_1 MISRA 2004 Required Rule 19.15, precautions to prevent the contents * of a header file being included twice * @violates @ref Wdg_PBcfg_c_REF_4 MISRA 2004 Required Rule 19.1, only preprocessor statements * and comments before '#include' */ #include "Wdg_MemMap.h" /** * @brief External Notifications for Wdg Interrupt */ extern FUNC (void, WDG_CODE) WdgExpire_Callback(void); #define WDG_STOP_SEC_CODE /** * @brief Include Memory mapping specification * @violates @ref Wdg_PBcfg_c_REF_1 MISRA 2004 Required Rule 19.15, precautions to prevent the contents * of a header file being included twice * @violates @ref Wdg_PBcfg_c_REF_4 MISRA 2004 Required Rule 19.1, only preprocessor statements * and comments before '#include' */ #include "Wdg_MemMap.h" /*================================================================================================== * GLOBAL CONSTANTS ==================================================================================================*/ #define WDG_START_SEC_CONFIG_DATA_UNSPECIFIED /** * @brief Include Memory mapping specification * @violates @ref Wdg_PBcfg_c_REF_1 MISRA 2004 Required Rule 19.15, precautions to prevent the contents * of a header file being included twice * @violates @ref Wdg_PBcfg_c_REF_4 MISRA 2004 Required Rule 19.1, only preprocessor statements * and comments before '#include' */ #include "Wdg_MemMap.h" /** @violates @ref Wdg_PBcfg_c_REF_3 MISRA 2004 Required Rule 8.10, All declarations and definitions of objects or * functions at file scope shall have internal linkage unless external linkage is required. */ /** @violates @ref Wdg_PBcfg_c_REF_2 MISRA 2004 Rule 1.4, The compiler/linker shall be checked to ensure * that 31 character significance and case sensitivity are supported for external identifiers. */ CONST(Wdg_Wdog_ConfigType, WDG_CONST) Wdg_Wdog_OffModeSettings_Instance0= { (uint32)( WDOG_DISABLED_U32 | WDOG_RESERVED_BIT13_U32 |WDOG_UPDATE_ENABLED_U32), /* WDG Control and configuration */ (uint32)0x00000100, /* Timeout config */ (uint32)0x00000000, /* Window config */ (boolean)FALSE, (uint32) 0x00000001 /* Internalwdgclocksource */ }; /** @violates @ref Wdg_PBcfg_c_REF_3 MISRA 2004 Required Rule 8.10, All declarations and definitions of objects or * functions at file scope shall have internal linkage unless external linkage is required. */ /** @violates @ref Wdg_PBcfg_c_REF_2 MISRA 2004 Rule 1.4, The compiler/linker shall be checked to ensure * that 31 character significance and case sensitivity are supported for external identifiers. */ CONST(Wdg_Wdog_ConfigType, WDG_CONST) Wdg_Wdog_SlowModeSettings_0= { (uint32)( WDOG_ENABLED_U32 | WDOG_RESERVED_BIT13_U32 | WDOG_TRIGGER_MODE_REGULAR_U32 | WDOG_RUN_IN_HALT_U32 | WDOG_RUN_IN_DEBUG_U32 | WDOG_RUN_IN_WAIT_U32 | WDOG_INTERRUPT_ENABLED_U32 | WDOG_LPO_CLK_U32 | WDOG_USER_MODE_ENABLED_U32 | WDOG_PRES_ENABLED_U32 | WDOG_UPDATE_ENABLED_U32 ), /* WDG Control and configuration */ (uint32)0x0007d000, /* Time-out config */ (uint32)0x00032000, /* Window config */ (boolean)TRUE, (uint32)128 /* Internalwdgclocksource */ }; /** @violates @ref Wdg_PBcfg_c_REF_3 MISRA 2004 Required Rule 8.10, All declarations and definitions of objects or * functions at file scope shall have internal linkage unless external linkage is required. */ /** @violates @ref Wdg_PBcfg_c_REF_2 MISRA 2004 Rule 1.4, The compiler/linker shall be checked to ensure * that 31 character significance and case sensitivity are supported for external identifiers. */ CONST(Wdg_Wdog_ConfigType, WDG_CONST) Wdg_Wdog_FastModeSettings_0= { (uint32)( WDOG_ENABLED_U32 | WDOG_RESERVED_BIT13_U32 | WDOG_TRIGGER_MODE_REGULAR_U32 | WDOG_RUN_IN_HALT_U32 | WDOG_RUN_IN_DEBUG_U32 | WDOG_RUN_IN_WAIT_U32 | WDOG_INTERRUPT_ENABLED_U32 | WDOG_SIRC_CLK_U32 | WDOG_TEST_MODE_DISABLED_U32 | WDOG_PRES_ENABLED_U32 | WDOG_UPDATE_ENABLED_U32 ), /* WDG Control and configuration */ (uint32)0x000c3500, /* Time-out config */ (uint32)0x0004e200, /* Window config */ (boolean)TRUE, (uint32)8000 /* Internalwdgclocksource */ }; /** * @brief This constant contains the configuration set for the postbuild time */ /** @violates @ref Wdg_PBcfg_c_REF_3 MISRA 2004 Required Rule 8.10, All declarations and definitions of objects or * functions at file scope shall have internal linkage unless external linkage is required. */ CONST(Wdg_ConfigType, WDG_CONST)WdgSettingsConfig = { WDGIF_OFF_MODE, WDG_IPW_INSTANCE0, (Gpt_ChannelType)GptConf_GptChannelConfiguration_GptChannelConfiguration_WdgTrig, (uint32)4000, { &Wdg_Wdog_OffModeSettings_Instance0, &Wdg_Wdog_SlowModeSettings_0, &Wdg_Wdog_FastModeSettings_0}, &WdgExpire_Callback /* WdgCallbackNotification */ }; #define WDG_STOP_SEC_CONFIG_DATA_UNSPECIFIED /** * @brief Include Memory mapping specification * @violates @ref Wdg_PBcfg_c_REF_1 MISRA 2004 Required Rule 19.15, precautions to prevent the contents * of a header file being included twice * @violates @ref Wdg_PBcfg_c_REF_4 MISRA 2004 Required Rule 19.1, only preprocessor statements * and comments before '#include' */ #include "Wdg_MemMap.h" /*================================================================================================== * GLOBAL VARIABLES ==================================================================================================*/ /*================================================================================================== * LOCAL FUNCTION PROTOTYPES ==================================================================================================*/ /*================================================================================================== * LOCAL FUNCTIONS ==================================================================================================*/ #endif /* #if WDG_INSTANCE0 == STD_ON*/ #ifdef __cplusplus } #endif /** @} */