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1. IWDG概述
stm32f4xx_iwdg.h和stm32f4xx_iwdg.c文件中 2. 相关类型 IWDG_WriteAccess /** @defgroup IWDG_WriteAccess * @{ */ #define IWDG_WriteAccess_Enable ( (uint16_t)0x5555) #define IWDG_WriteAccess_Disable ( (uint16_t)0x0000) #define IS_IWDG_WRITE_ACCESS(ACCESS) ( ( (ACCESS) == IWDG_WriteAccess_Enable) || ( (ACCESS) == IWDG_WriteAccess_Disable) ) IWDG_prescaler /** @defgroup IWDG_prescaler * @{ */ #define IWDG_Prescaler_4 ( (uint8_t)0x00) #define IWDG_Prescaler_8 ( (uint8_t)0x01) #define IWDG_Prescaler_16 ( (uint8_t)0x02) #define IWDG_Prescaler_32 ( (uint8_t)0x03) #define IWDG_Prescaler_64 ( (uint8_t)0x04) #define IWDG_Prescaler_128 ( (uint8_t)0x05) #define IWDG_Prescaler_256 ( (uint8_t)0x06) #define IS_IWDG_PRESCALER(PRESCALER) (((PRESCALER) == IWDG_Prescaler_4) || ( (PRESCALER) == IWDG_Prescaler_8) || ( (PRESCALER) == IWDG_Prescaler_16) || ( (PRESCALER) == IWDG_Prescaler_32) || ( (PRESCALER) == IWDG_Prescaler_64) || ( (PRESCALER) == IWDG_Prescaler_128)|| ( (PRESCALER) == IWDG_Prescaler_256) ) IWDG_Flag /** @defgroup IWDG_Flag * @{ */ #define IWDG_FLAG_PVU ( (uint16_t)0x0001) #define IWDG_FLAG_RVU ( (uint16_t)0x0002) #define IS_IWDG_FLAG(FLAG) ( ( (FLAG) == IWDG_FLAG_PVU) || ((FLAG) == IWDG_FLAG_RVU) ) #define IS_IWDG_RELOAD(RELOAD) ( (RELOAD) 《= 0xFFF) 3. 相关函数 /* Exported macro ------------------------------------------------------------*/ /* Exported functions --------------------------------------------------------*/ /* Prescaler and Counter configuration functions ******************************/ void IWDG_WriteAccessCmd(uint16_t IWDG_WriteAccess); void IWDG_SetPrescaler(uint8_t IWDG_Prescaler); void IWDG_SetReload(uint16_t Reload); void IWDG_ReloadCounter(void); /* IWDG activation function ***************************************************/ void IWDG_Enable(void); /* Flag management function ***************************************************/ FlagStatus IWDG_GetFlagStatus(uint16_t IWDG_FLAG); 4. 结构体封装 /** * @brief Independent WATCHDOG */ typedef struct { __IO uint32_t KR; /*!《 IWDG Key register, Address offset: 0x00 */ __IO uint32_t PR; /*!《 IWDG Prescaler register, Address offset: 0x04 */ __IO uint32_t RLR; /*!《 IWDG Reload register, Address offset: 0x08 */ __IO uint32_t SR; /*!《 IWDG Status register, Address offset: 0x0C */ } IWDG_TypeDef; |
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