text: /**
    ******************************************************************************
    * @file    stm32f4xx_iwdg.h
    * @author  MCD Application Team
    * @version V1.0.0
    * @date    30-September-2011
    * @brief   This file contains all the functions prototypes for the IWDG 
    *          firmware library.
    ******************************************************************************
    * @attention
    *
    * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
    * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
    * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
    * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
    * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
    * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
    *
    * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
    ******************************************************************************
    */
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef __STM32F4xx_IWDG_H
  #define __STM32F4xx_IWDG_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f4xx.h"
  
  /** @addtogroup STM32F4xx_StdPeriph_Driver
    * @{
    */
  
  /** @addtogroup IWDG
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /* Exported constants --------------------------------------------------------*/
  
  /** @defgroup IWDG_Exported_Constants
    * @{
    */
    
  /** @defgroup IWDG_WriteAccess
    * @{
    */
  #define IWDG_WriteAccess_Enable     ((uint16_t)0x5555)
  #define IWDG_WriteAccess_Disable    ((uint16_t)0x0000)
  #define IS_IWDG_WRITE_ACCESS(ACCESS) (((ACCESS) == IWDG_WriteAccess_Enable) || \
                                        ((ACCESS) == IWDG_WriteAccess_Disable))
  /**
    * @}
    */
  
  /** @defgroup IWDG_prescaler 
    * @{
    */
  #define IWDG_Prescaler_4            ((uint8_t)0x00)
  #define IWDG_Prescaler_8            ((uint8_t)0x01)
  #define IWDG_Prescaler_16           ((uint8_t)0x02)
  #define IWDG_Prescaler_32           ((uint8_t)0x03)
  #define IWDG_Prescaler_64           ((uint8_t)0x04)
  #define IWDG_Prescaler_128          ((uint8_t)0x05)
  #define IWDG_Prescaler_256          ((uint8_t)0x06)
  #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))
  /**
    * @}
    */
  
  /** @defgroup IWDG_Flag 
    * @{
    */
  #define IWDG_FLAG_PVU               ((uint16_t)0x0001)
  #define IWDG_FLAG_RVU               ((uint16_t)0x0002)
  #define IS_IWDG_FLAG(FLAG) (((FLAG) == IWDG_FLAG_PVU) || ((FLAG) == IWDG_FLAG_RVU))
  #define IS_IWDG_RELOAD(RELOAD) ((RELOAD) <= 0xFFF)
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Exported macro ------------------------------------------------------------*/
  /* Exported functions --------------------------------------------------------*/
  
  /* Prescaler and Counter configuration functions ******************************/
  void IWDG_WriteAccessCmd(uint16_t IWDG_WriteAccess);
  void IWDG_SetPrescaler(uint8_t IWDG_Prescaler);
  void IWDG_SetReload(uint16_t Reload);
  void IWDG_ReloadCounter(void);
  
  /* IWDG activation function ***************************************************/
  void IWDG_Enable(void);
  
  /* Flag management function ***************************************************/
  FlagStatus IWDG_GetFlagStatus(uint16_t IWDG_FLAG);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32F4xx_IWDG_H */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
  