IO operation functions

IO operation functions. More...

Functions
HAL_StatusTypeDef	HAL_WWDG_Refresh (WWDG_HandleTypeDef *hwwdg)
	Refresh the WWDG. More...
void	HAL_WWDG_IRQHandler (WWDG_HandleTypeDef *hwwdg)
	Handle WWDG interrupt request. More...
void	HAL_WWDG_EarlyWakeupCallback (WWDG_HandleTypeDef *hwwdg)
	WWDG Early Wakeup callback. More...

Detailed Description

IO operation functions.

  ==============================================================================
                      ##### IO operation functions #####
  ==============================================================================
  [..]
    This section provides functions allowing to:
    (+) Refresh the WWDG.
    (+) Handle WWDG interrupt request and associated function callback.

Function Documentation

HAL_WWDG_EarlyWakeupCallback()

__weak void HAL_WWDG_EarlyWakeupCallback

(

WWDG_HandleTypeDef *

hwwdg

)

WWDG Early Wakeup callback.

Parameters

hwwdg

pointer to a WWDG_HandleTypeDef structure that contains the configuration information for the specified WWDG module.

Return values

None

Definition at line 382 of file stm32l4xx_hal_wwdg.c.

{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hwwdg);

  /* NOTE: This function should not be modified, when the callback is needed,
           the HAL_WWDG_EarlyWakeupCallback could be implemented in the user file
   */
}

HAL_WWDG_IRQHandler()

void HAL_WWDG_IRQHandler

(

WWDG_HandleTypeDef *

hwwdg

)

Handle WWDG interrupt request.

Note

The Early Wakeup Interrupt (EWI) can be used if specific safety operations or data logging must be performed before the actual reset is generated. The EWI interrupt is enabled by calling HAL_WWDG_Init function with EWIMode set to WWDG_EWI_ENABLE. When the downcounter reaches the value 0x40, and EWI interrupt is generated and the corresponding Interrupt Service Routine (ISR) can be used to trigger specific actions (such as communications or data logging), before resetting the device.

Parameters

hwwdg

pointer to a WWDG_HandleTypeDef structure that contains the configuration information for the specified WWDG module.

Return values

None

Definition at line 353 of file stm32l4xx_hal_wwdg.c.

{
  /* Check if Early Wakeup Interrupt is enable */
  if (__HAL_WWDG_GET_IT_SOURCE(hwwdg, WWDG_IT_EWI) != RESET)
  {
    /* Check if WWDG Early Wakeup Interrupt occurred */
    if (__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
    {
      /* Clear the WWDG Early Wakeup flag */
      __HAL_WWDG_CLEAR_FLAG(hwwdg, WWDG_FLAG_EWIF);

#if (USE_HAL_WWDG_REGISTER_CALLBACKS == 1)
      /* Early Wakeup registered callback */
      hwwdg->EwiCallback(hwwdg);
#else
      /* Early Wakeup callback */
      HAL_WWDG_EarlyWakeupCallback(hwwdg);
#endif
    }
  }
}

HAL_WWDG_Refresh()

HAL_StatusTypeDef HAL_WWDG_Refresh

(

WWDG_HandleTypeDef *

hwwdg

)

Refresh the WWDG.

Parameters

hwwdg

pointer to a WWDG_HandleTypeDef structure that contains the configuration information for the specified WWDG module.

Return values

HAL

status

Definition at line 330 of file stm32l4xx_hal_wwdg.c.

{
  /* Write to WWDG CR the WWDG Counter value to refresh with */
  WRITE_REG(hwwdg->Instance->CR, (hwwdg->Init.Counter));

  /* Return function status */
  return HAL_OK;
}