stm32f wwdg iwdg 그리고 stop mode

iwdg가 wdg_sw 설정되는줄 알았는데.. iwdg가 software랑 hardware로 나눠지는 듯.. 찾아봐야겠네

 

Option Byte는 아래의 api를 통해 접근할수 있고

HAL_StatusTypeDef HAL_FLASHEx_OBProgram(FLASH_OBProgramInitTypeDef *pOBInit)

 

UserConfig 변수내에 bit 단위로 설정되도록 되어있다.

typedef struct { uint32_t OptionType; /*!< OptionType: Option byte to be configured. This parameter can be a value of @ref FLASHEx_OB_Type */ uint32_t WRPState; /*!< WRPState: Write protection activation or deactivation. This parameter can be a value of @ref FLASHEx_OB_WRP_State */ uint32_t WRPPage; /*!< WRPPage: specifies the page(s) to be write protected This parameter can be a value of @ref FLASHEx_OB_Write_Protection */ uint32_t Banks; /*!< Select banks for WRP activation/deactivation of all sectors. This parameter must be a value of @ref FLASHEx_Banks */   uint8_t RDPLevel; /*!< RDPLevel: Set the read protection level.. This parameter can be a value of @ref FLASHEx_OB_Read_Protection */ #if defined(FLASH_BANK2_END) uint8_t USERConfig; /*!< USERConfig: Program the FLASH User Option Byte: IWDG / STOP / STDBY / BOOT1 This parameter can be a combination of @ref FLASHEx_OB_IWatchdog, @ref FLASHEx_OB_nRST_STOP, @ref FLASHEx_OB_nRST_STDBY, @ref FLASHEx_OB_BOOT1 */ #else uint8_t USERConfig; /*!< USERConfig: Program the FLASH User Option Byte: IWDG / STOP / STDBY This parameter can be a combination of @ref FLASHEx_OB_IWatchdog, @ref FLASHEx_OB_nRST_STOP, @ref FLASHEx_OB_nRST_STDBY */ #endif /* FLASH_BANK2_END */ uint32_t DATAAddress; /*!< DATAAddress: Address of the option byte DATA to be programmed This parameter can be a value of @ref FLASHEx_OB_Data_Address */   uint8_t DATAData; /*!< DATAData: Data to be stored in the option byte DATA This parameter must be a number between Min_Data = 0x00 and Max_Data = 0xFF */ } FLASH_OBProgramInitTypeDef;

 

STOP 모드 들어가면 리셋걸리지 않게 하려면 해당 OB로 설정해주어야 하나..

/** @defgroup FLASHEx_OB_IWatchdog Option Byte IWatchdog * @{ */ #define OB_IWDG_SW ((uint16_t)0x0001) /*!< Software IWDG selected */ #define OB_IWDG_HW ((uint16_t)0x0000) /*!< Hardware IWDG selected */ /** * @} */ /** @defgroup FLASHEx_OB_nRST_STOP Option Byte nRST STOP * @{ */ #define OB_STOP_NO_RST ((uint16_t)0x0002) /*!< No reset generated when entering in STOP */ #define OB_STOP_RST ((uint16_t)0x0000) /*!< Reset generated when entering in STOP */ /** * @} */ /** @defgroup FLASHEx_OB_nRST_STDBY Option Byte nRST STDBY * @{ */ #define OB_STDBY_NO_RST ((uint16_t)0x0004) /*!< No reset generated when entering in STANDBY */ #define OB_STDBY_RST ((uint16_t)0x0000) /*!< Reset generated when entering in STANDBY */

 

HAL_FLASHEx_OBGetConfig() HAL_FLASH_OB_Unlock() HAL_FLASH_Unlock() HAL_FLASH_OB_Launch()

[링크 : https://blog.naver.com/eziya76/220988141146]

[링크 : https://community.st.com/t5/stm32-mcus/how-to-program-stm32-option-bytes-with-the-hal-api/ta-p/49660]

 

IWDG는 option byte에 설정 가능 - 설정하면 리부팅 필요 혹은 강제로 리부팅됨

[링크 : https://m.blog.naver.com/kim1417/221461254045]

[링크 : https://pineenergy.tistory.com/138]

 

The Independent watchdog can not be stopped in any processor mode. You have to wake up regularly to reload the watchdog. What you can do is change the prescaler to maximum so the watchdog is counting slowly. IWDG will only be stopped if you disconnect the controller from the power supply.

[링크 : https://stackoverflow.com/questions/53334571/disabling-stm32-hal-iwdg-or-wwdg-watchdog-before-stop-mode]

 

stm32g 의 경우인데 f에 없는 플래그가 존재한다.

[링크 : https://community.st.com/t5/stm32-mcus-products/iwdg-disable-during-sleep-stop/td-p/95106]

 

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2025.07.31

stm32f1xx_hal.h 에서 찾은 건데..

FREEZE 로 된걸 해주면 stp 모드에서 동결되려나? 그런데 debug mode 래서 언제 쓸수 있는지 찾아봐야 할 듯.

/** * @brief WWDG Peripherals Debug mode */ #define __HAL_DBGMCU_FREEZE_WWDG() SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_WWDG_STOP) #define __HAL_DBGMCU_UNFREEZE_WWDG() CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_WWDG_STOP) /** * @brief IWDG Peripherals Debug mode */ #define __HAL_DBGMCU_FREEZE_IWDG() SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_IWDG_STOP) #define __HAL_DBGMCU_UNFREEZE_IWDG() CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_IWDG_STOP)