Executing the __HAL_RCC_WWDG_CLK_ENABLE() function immediately resets the CPU.

[wkim.4]

I enabled WWDG on the MX and there were no other settings. MX_WWDG_Init(); As the function executes, the CPU resets, and when I look closely, I see that __HAL_RCC_WWDG_CLK_ENABLE(); As soon as the function runs, the CPU is reset. What should I do?

Below are WWDG setting values. This is also a program created automatically by MX.

void MX_WWDG_Init(void)

{

 /* USER CODE BEGIN WWDG_Init 0 */

 /* USER CODE END WWDG_Init 0 */

 /* USER CODE BEGIN WWDG_Init 1 */

 /* USER CODE END WWDG_Init 1 */

 hwwdg.Instance = WWDG;

 hwwdg.Init.Prescaler = WWDG_PRESCALER_8;

 hwwdg.Init.Window = 127;

 hwwdg.Init.Counter = 127;

 hwwdg.Init.EWIMode = WWDG_EWI_DISABLE;

 if (HAL_WWDG_Init(&hwwdg) != HAL_OK)

 {

  Error_Handler();

 }

 /* USER CODE BEGIN WWDG_Init 2 */

 /* USER CODE END WWDG_Init 2 */

}

void HAL_WWDG_MspInit(WWDG_HandleTypeDef* wwdgHandle)

{

 if(wwdgHandle->Instance==WWDG)

 {

 /* USER CODE BEGIN WWDG_MspInit 0 */

 /* USER CODE END WWDG_MspInit 0 */

  /* WWDG clock enable */

  __HAL_RCC_WWDG_CLK_ENABLE();

 /* USER CODE BEGIN WWDG_MspInit 1 */

 /* USER CODE END WWDG_MspInit 1 */

 }

}

[Aime]

Hi @wkim.4​ ,

Which STM32 are you using ?

You should know that ;)

"The watchdog circuit generates an MCU reset on expiry of a programmed time period, unless the program refreshes the contents of the down-counter. An MCU reset is also generated if the 7-bit down-counter value (in the control register) is refreshed before the down-counter has reached the window register value"

In you code, the watchdog counter and the window have the same value, did you try to reduce the hwwdg.Init.Window value?

Thanks

A.MVE