text: /**
    ******************************************************************************
    * @file    stm32f7xx_hal_iwdg.h
    * @author  MCD Application Team
    * @version V1.0.4
    * @date    09-December-2015
    * @brief   Header file of IWDG HAL module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
    *
    * Redistribution and use in source and binary forms, with or without modification,
    * are permitted provided that the following conditions are met:
    *   1. Redistributions of source code must retain the above copyright notice,
    *      this list of conditions and the following disclaimer.
    *   2. Redistributions in binary form must reproduce the above copyright notice,
    *      this list of conditions and the following disclaimer in the documentation
    *      and/or other materials provided with the distribution.
    *   3. Neither the name of STMicroelectronics nor the names of its contributors
    *      may be used to endorse or promote products derived from this software
    *      without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
    * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    ******************************************************************************
    */ 
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef __STM32F7xx_HAL_IWDG_H
  #define __STM32F7xx_HAL_IWDG_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f7xx_hal_def.h"
  
  /** @addtogroup STM32F7xx_HAL_Driver
    * @{
    */
  
  /** @addtogroup IWDG
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /** @defgroup IWDG_Exported_Types IWDG Exported Types
    * @{
    */
  
  /** 
    * @brief  IWDG HAL State Structure definition
    */
  typedef enum
  {
    HAL_IWDG_STATE_RESET     = 0x00,  /*!< IWDG not yet initialized or disabled */
    HAL_IWDG_STATE_READY     = 0x01,  /*!< IWDG initialized and ready for use   */
    HAL_IWDG_STATE_BUSY      = 0x02,  /*!< IWDG internal process is ongoing     */
    HAL_IWDG_STATE_TIMEOUT   = 0x03,  /*!< IWDG timeout state                   */
    HAL_IWDG_STATE_ERROR     = 0x04   /*!< IWDG error state                     */
  
  }HAL_IWDG_StateTypeDef;
  
  /** 
    * @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 */
  
    HAL_LockTypeDef              Lock;      /*!< IWDG Locking object      */
  
    __IO HAL_IWDG_StateTypeDef   State;      /*!< IWDG communication state */
  
  }IWDG_HandleTypeDef;
  
  /**
    * @}
    */
  
  /* Exported constants --------------------------------------------------------*/
  /** @defgroup IWDG_Exported_Constants IWDG Exported Constants
    * @{
    */
  
  /** @defgroup IWDG_Prescaler IWDG Prescaler
    * @{
    */
  #define IWDG_PRESCALER_4                ((uint8_t)0x00)                            /*!< IWDG prescaler set to 4   */
  #define IWDG_PRESCALER_8                ((uint8_t)(IWDG_PR_PR_0))                  /*!< IWDG prescaler set to 8   */
  #define IWDG_PRESCALER_16               ((uint8_t)(IWDG_PR_PR_1))                  /*!< IWDG prescaler set to 16  */
  #define IWDG_PRESCALER_32               ((uint8_t)(IWDG_PR_PR_1 | IWDG_PR_PR_0))   /*!< IWDG prescaler set to 32  */
  #define IWDG_PRESCALER_64               ((uint8_t)(IWDG_PR_PR_2))                  /*!< IWDG prescaler set to 64  */
  #define IWDG_PRESCALER_128              ((uint8_t)(IWDG_PR_PR_2 | IWDG_PR_PR_0))   /*!< IWDG prescaler set to 128 */
  #define IWDG_PRESCALER_256              ((uint8_t)(IWDG_PR_PR_2 | IWDG_PR_PR_1))   /*!< IWDG prescaler set to 256 */
  /**
    * @}
    */
  
  /** @defgroup IWDG_Window IWDG Window
    * @{
    */
  #define IWDG_WINDOW_DISABLE             ((uint32_t)0x00000FFF)
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Exported macros -----------------------------------------------------------*/
  /** @defgroup IWDG_Exported_Macros IWDG Exported Macros
    * @{
    */
  
  /** @brief Reset IWDG handle state
    * @param  __HANDLE__: IWDG handle.
    * @retval None
    */
  #define __HAL_IWDG_RESET_HANDLE_STATE(__HANDLE__)   ((__HANDLE__)->State = HAL_IWDG_STATE_RESET)
  
  /**
    * @brief  Enables the IWDG peripheral.
    * @param  __HANDLE__: IWDG handle
    * @retval None
    */
  #define __HAL_IWDG_START(__HANDLE__)                WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_ENABLE)
  
  /**
    * @brief  Reloads IWDG counter with value defined in the reload register
    *         (write access to IWDG_PR and IWDG_RLR registers disabled).
    * @param  __HANDLE__: IWDG handle
    * @retval None
    */
  #define __HAL_IWDG_RELOAD_COUNTER(__HANDLE__)       WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_RELOAD)
  
  /**
    * @brief  Gets the selected IWDG's flag status.
    * @param  __HANDLE__: IWDG handle
    * @param  __FLAG__: specifies the flag to check.
    *         This parameter can be one of the following values:
    *            @arg IWDG_FLAG_PVU:  Watchdog counter reload value update flag
    *            @arg IWDG_FLAG_RVU:  Watchdog counter prescaler value flag
    *            @arg IWDG_FLAG_WVU:  Watchdog counter window value flag
    * @retval The new state of __FLAG__ (TRUE or FALSE) .
    */
  #define __HAL_IWDG_GET_FLAG(__HANDLE__, __FLAG__)   (((__HANDLE__)->Instance->SR & (__FLAG__)) == (__FLAG__))
  
  /**
    * @}
    */
  
  /* Exported functions --------------------------------------------------------*/
  /** @addtogroup IWDG_Exported_Functions
    * @{
    */
  
  /** @addtogroup IWDG_Exported_Functions_Group1
    * @{
    */
  /* Initialization/de-initialization functions  ********************************/
  HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg);
  void              HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg);
  /**
    * @}
    */
  
  /** @addtogroup IWDG_Exported_Functions_Group2
    * @{
    */
  /* I/O operation functions ****************************************************/
  HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg);
  HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg);
  /**
    * @}
    */
  
  /** @addtogroup IWDG_Exported_Functions_Group3
    * @{
    */
  /* Peripheral State functions  ************************************************/
  HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg);
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Private constants ---------------------------------------------------------*/
  /** @addtogroup IWDG_Private_Defines
    * @{
    */
  /**
    * @brief  IWDG Key Register BitMask
    */
  #define IWDG_KEY_RELOAD                 ((uint32_t)0x0000AAAA)  /*!< IWDG Reload Counter Enable   */
  #define IWDG_KEY_ENABLE                 ((uint32_t)0x0000CCCC)  /*!< IWDG Peripheral Enable       */
  #define IWDG_KEY_WRITE_ACCESS_ENABLE    ((uint32_t)0x00005555)  /*!< IWDG KR Write Access Enable  */
  #define IWDG_KEY_WRITE_ACCESS_DISABLE   ((uint32_t)0x00000000)  /*!< IWDG KR Write Access Disable */
  
  /**
    * @brief  IWDG Flag definition
    */
  #define IWDG_FLAG_PVU                   ((uint32_t)IWDG_SR_PVU)  /*!< Watchdog counter prescaler value update flag */
  #define IWDG_FLAG_RVU                   ((uint32_t)IWDG_SR_RVU)  /*!< Watchdog counter reload value update flag    */
  #define IWDG_FLAG_WVU                   ((uint32_t)IWDG_SR_WVU)  /*!< Watchdog counter window value update flag    */
  
  /**
    * @}
    */
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup IWDG_Private_Macro IWDG Private Macros
    * @{
    */
  /**
    * @brief  Enables 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  Disables 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__) <= 0xFFF)
  
  /**
    * @brief  Check IWDG window value.
    * @param  __WINDOW__: IWDG window value
    * @retval None
    */
  #define IS_IWDG_WINDOW(__WINDOW__)            ((__WINDOW__) <= 0xFFF)
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32F7xx_HAL_IWDG_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  