text: /**
    ******************************************************************************
    * @file    stm32l5xx_hal_iwdg.h
    * @author  MCD Application Team
    * @brief   Header file of IWDG HAL module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
    * All rights reserved.</center></h2>
    *
    * This software component is licensed by ST under BSD 3-Clause license,
    * the "License"; You may not use this file except in compliance with the
    * License. You may obtain a copy of the License at:
    *                        opensource.org/licenses/BSD-3-Clause
    *
    ******************************************************************************
    */
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef STM32L5xx_HAL_IWDG_H
  #define STM32L5xx_HAL_IWDG_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32l5xx_hal_def.h"
  
  /** @addtogroup STM32L5xx_HAL_Driver
    * @{
    */
  
  /** @defgroup IWDG IWDG
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /** @defgroup IWDG_Exported_Types IWDG Exported Types
    * @{
    */
  
  /**
    * @brief  IWDG Init structure definition
    */
  typedef struct
  {
    uint32_t Prescaler;  /*!< Select the prescaler of the IWDG.
                              This parameter can be a value of @ref IWDG_Prescaler */
  
    uint32_t Reload;     /*!< Specifies the IWDG down-counter reload value.
                              This parameter must be a number between Min_Data = 0 and Max_Data = 0x0FFF */
  
    uint32_t Window;     /*!< Specifies the window value to be compared to the down-counter.
                              This parameter must be a number between Min_Data = 0 and Max_Data = 0x0FFF */
  
  } IWDG_InitTypeDef;
  
  /**
    * @brief  IWDG Handle Structure definition
    */
  typedef struct
  {
    IWDG_TypeDef                 *Instance;  /*!< Register base address    */
  
    IWDG_InitTypeDef             Init;       /*!< IWDG required parameters */
  } IWDG_HandleTypeDef;
  
  
  /**
    * @}
    */
  
  /* Exported constants --------------------------------------------------------*/
  /** @defgroup IWDG_Exported_Constants IWDG Exported Constants
    * @{
    */
  
  /** @defgroup IWDG_Prescaler IWDG Prescaler
    * @{
    */
  #define IWDG_PRESCALER_4                0x00000000u                                     /*!< IWDG prescaler set to 4   */
  #define IWDG_PRESCALER_8                IWDG_PR_PR_0                                    /*!< IWDG prescaler set to 8   */
  #define IWDG_PRESCALER_16               IWDG_PR_PR_1                                    /*!< IWDG prescaler set to 16  */
  #define IWDG_PRESCALER_32               (IWDG_PR_PR_1 | IWDG_PR_PR_0)                   /*!< IWDG prescaler set to 32  */
  #define IWDG_PRESCALER_64               IWDG_PR_PR_2                                    /*!< IWDG prescaler set to 64  */
  #define IWDG_PRESCALER_128              (IWDG_PR_PR_2 | IWDG_PR_PR_0)                   /*!< IWDG prescaler set to 128 */
  #define IWDG_PRESCALER_256              (IWDG_PR_PR_2 | IWDG_PR_PR_1)                   /*!< IWDG prescaler set to 256 */
  
  /**
    * @}
    */
  
  /** @defgroup IWDG_Window_option IWDG Window option
    * @{
    */
  #define IWDG_WINDOW_DISABLE             IWDG_WINR_WIN
  /**
    * @}
    */
  
  
  /**
    * @}
    */
  
  /* Exported macros -----------------------------------------------------------*/
  /** @defgroup IWDG_Exported_Macros IWDG Exported Macros
    * @{
    */
  
  /**
    * @brief  Enable the IWDG peripheral.
    * @param  __HANDLE__  IWDG handle
    * @retval None
    */
  #define __HAL_IWDG_START(__HANDLE__)                WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_ENABLE)
  
  /**
    * @brief  Reload IWDG counter with value defined in the reload register
    *         (write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers disabled).
    * @param  __HANDLE__  IWDG handle
    * @retval None
    */
  #define __HAL_IWDG_RELOAD_COUNTER(__HANDLE__)       WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_RELOAD)
  
  /**
    * @}
    */
  
  /* Exported functions --------------------------------------------------------*/
  /** @defgroup IWDG_Exported_Functions  IWDG Exported Functions
    * @{
    */
  
  /** @defgroup IWDG_Exported_Functions_Group1 Initialization and Start functions
    * @{
    */
  /* Initialization/Start functions  ********************************************/
  HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg);
  /**
    * @}
    */
  
  /** @defgroup IWDG_Exported_Functions_Group2 IO operation functions
    * @{
    */
  /* I/O operation functions ****************************************************/
  HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg);
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Private constants ---------------------------------------------------------*/
  /** @defgroup IWDG_Private_Constants IWDG Private Constants
    * @{
    */
  
  /**
    * @brief  IWDG Key Register BitMask
    */
  #define IWDG_KEY_RELOAD                 0x0000AAAAu  /*!< IWDG Reload Counter Enable   */
  #define IWDG_KEY_ENABLE                 0x0000CCCCu  /*!< IWDG Peripheral Enable       */
  #define IWDG_KEY_WRITE_ACCESS_ENABLE    0x00005555u  /*!< IWDG KR Write Access Enable  */
  #define IWDG_KEY_WRITE_ACCESS_DISABLE   0x00000000u  /*!< IWDG KR Write Access Disable */
  
  /**
    * @}
    */
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup IWDG_Private_Macros IWDG Private Macros
    * @{
    */
  
  /**
    * @brief  Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
    * @param  __HANDLE__  IWDG handle
    * @retval None
    */
  #define IWDG_ENABLE_WRITE_ACCESS(__HANDLE__)  WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_WRITE_ACCESS_ENABLE)
  
  /**
    * @brief  Disable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
    * @param  __HANDLE__  IWDG handle
    * @retval None
    */
  #define IWDG_DISABLE_WRITE_ACCESS(__HANDLE__) WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_WRITE_ACCESS_DISABLE)
  
  /**
    * @brief  Check IWDG prescaler value.
    * @param  __PRESCALER__  IWDG prescaler value
    * @retval None
    */
  #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))
  
  /**
    * @brief  Check IWDG reload value.
    * @param  __RELOAD__  IWDG reload value
    * @retval None
    */
  #define IS_IWDG_RELOAD(__RELOAD__)            ((__RELOAD__) <= IWDG_RLR_RL)
  
  /**
    * @brief  Check IWDG window value.
    * @param  __WINDOW__  IWDG window value
    * @retval None
    */
  #define IS_IWDG_WINDOW(__WINDOW__)            ((__WINDOW__) <= IWDG_WINR_WIN)
  
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* STM32L5xx_HAL_IWDG_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  