text: /**
    ******************************************************************************
    * @file    stm32f7xx_hal_rng.h
    * @author  MCD Application Team
    * @version V1.0.1
    * @date    25-June-2015
    * @brief   Header file of RNG 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_RNG_H
  #define __STM32F7xx_HAL_RNG_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f7xx_hal_def.h"
  
  /** @addtogroup STM32F7xx_HAL_Driver
    * @{
    */
  
  /** @defgroup RNG RNG
    * @brief RNG HAL module driver
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/ 
  
  /** @defgroup RNG_Exported_Types RNG Exported Types
    * @{
    */
  
  /** @defgroup RNG_Exported_Types_Group1 RNG State Structure definition 
    * @{
    */
  typedef enum
  {
    HAL_RNG_STATE_RESET     = 0x00,  /*!< RNG not yet initialized or disabled */
    HAL_RNG_STATE_READY     = 0x01,  /*!< RNG initialized and ready for use   */
    HAL_RNG_STATE_BUSY      = 0x02,  /*!< RNG internal process is ongoing     */ 
    HAL_RNG_STATE_TIMEOUT   = 0x03,  /*!< RNG timeout state                   */
    HAL_RNG_STATE_ERROR     = 0x04   /*!< RNG error state                     */
      
  }HAL_RNG_StateTypeDef;
  
  /** 
    * @}
    */
  
  /** @defgroup RNG_Exported_Types_Group2 RNG Handle Structure definition   
    * @{
    */ 
  typedef struct
  {
    RNG_TypeDef                 *Instance;    /*!< Register base address   */
  
    uint32_t                    RandomNumber; /*!< Last Generated random number */	
    
    HAL_LockTypeDef             Lock;         /*!< RNG locking object      */
    
    __IO HAL_RNG_StateTypeDef   State;        /*!< RNG communication state */
    
  }RNG_HandleTypeDef;
  
  /** 
    * @}
    */
  
  /**
    * @}
    */ 
     
  /* Exported constants --------------------------------------------------------*/
  
  /** @defgroup RNG_Exported_Constants RNG Exported Constants
    * @{
    */
  
  /** @defgroup RNG_Exported_Constants_Group1 RNG Interrupt definition
    * @{
    */
  #define RNG_IT_DRDY  RNG_SR_DRDY  /*!< Data Ready interrupt  */
  #define RNG_IT_CEI   RNG_SR_CEIS  /*!< Clock error interrupt */
  #define RNG_IT_SEI   RNG_SR_SEIS  /*!< Seed error interrupt  */
  /**
    * @}
    */
  
  /** @defgroup RNG_Exported_Constants_Group2 RNG Flag definition
    * @{
    */
  #define RNG_FLAG_DRDY   RNG_SR_DRDY  /*!< Data ready                 */
  #define RNG_FLAG_CECS   RNG_SR_CECS  /*!< Clock error current status */
  #define RNG_FLAG_SECS   RNG_SR_SECS  /*!< Seed error current status  */
  
  /**
    * @}
    */
  
  /**
    * @}
    */ 
    
  /* Exported macros -----------------------------------------------------------*/
  
  /** @defgroup RNG_Exported_Macros RNG Exported Macros
    * @{
    */
  
  /** @brief Reset RNG handle state
    * @param  __HANDLE__: RNG Handle
    * @retval None
    */
  #define __HAL_RNG_RESET_HANDLE_STATE(__HANDLE__) ((__HANDLE__)->State = HAL_RNG_STATE_RESET)
  
  /**
    * @brief  Enables the RNG peripheral.
    * @param  __HANDLE__: RNG Handle
    * @retval None
    */
  #define __HAL_RNG_ENABLE(__HANDLE__) ((__HANDLE__)->Instance->CR |=  RNG_CR_RNGEN)
  
  /**
    * @brief  Disables the RNG peripheral.
    * @param  __HANDLE__: RNG Handle
    * @retval None
    */
  #define __HAL_RNG_DISABLE(__HANDLE__) ((__HANDLE__)->Instance->CR &= ~RNG_CR_RNGEN)
  
  /**
    * @brief  Check the selected RNG flag status.
    * @param  __HANDLE__: RNG Handle
    * @param  __FLAG__: RNG flag
    *          This parameter can be one of the following values:
    *            @arg RNG_FLAG_DRDY: Data ready                
    *            @arg RNG_FLAG_CECS: Clock error current status
    *            @arg RNG_FLAG_SECS: Seed error current status 
    * @retval The new state of __FLAG__ (SET or RESET).
    */
  #define __HAL_RNG_GET_FLAG(__HANDLE__, __FLAG__) (((__HANDLE__)->Instance->SR & (__FLAG__)) == (__FLAG__))
  
  /**
    * @brief  Clears the selected RNG flag status.
    * @param  __HANDLE__: RNG handle
    * @param  __FLAG__: RNG flag to clear  
    * @note   WARNING: This is a dummy macro for HAL code alignment,
    *         flags RNG_FLAG_DRDY, RNG_FLAG_CECS and RNG_FLAG_SECS are read-only.
    * @retval None
    */
  #define __HAL_RNG_CLEAR_FLAG(__HANDLE__, __FLAG__)                      /* dummy  macro */
  
  
  
  /**
    * @brief  Enables the RNG interrupts.
    * @param  __HANDLE__: RNG Handle
    * @retval None
    */
  #define __HAL_RNG_ENABLE_IT(__HANDLE__) ((__HANDLE__)->Instance->CR |=  RNG_CR_IE)
      
  /**
    * @brief  Disables the RNG interrupts.
    * @param  __HANDLE__: RNG Handle
    * @retval None
    */
  #define __HAL_RNG_DISABLE_IT(__HANDLE__) ((__HANDLE__)->Instance->CR &= ~RNG_CR_IE)
  
  /**
    * @brief  Checks whether the specified RNG interrupt has occurred or not.
    * @param  __HANDLE__: RNG Handle
    * @param  __INTERRUPT__: specifies the RNG interrupt status flag to check.
    *         This parameter can be one of the following values:
    *            @arg RNG_IT_DRDY: Data ready interrupt              
    *            @arg RNG_IT_CEI: Clock error interrupt
    *            @arg RNG_IT_SEI: Seed error interrupt
    * @retval The new state of __INTERRUPT__ (SET or RESET).
    */
  #define __HAL_RNG_GET_IT(__HANDLE__, __INTERRUPT__) (((__HANDLE__)->Instance->SR & (__INTERRUPT__)) == (__INTERRUPT__))   
  
  /**
    * @brief  Clear the RNG interrupt status flags.
    * @param  __HANDLE__: RNG Handle
    * @param  __INTERRUPT__: specifies the RNG interrupt status flag to clear.
    *          This parameter can be one of the following values:            
    *            @arg RNG_IT_CEI: Clock error interrupt
    *            @arg RNG_IT_SEI: Seed error interrupt
    * @note   RNG_IT_DRDY flag is read-only, reading RNG_DR register automatically clears RNG_IT_DRDY.          
    * @retval None
    */
  #define __HAL_RNG_CLEAR_IT(__HANDLE__, __INTERRUPT__) (((__HANDLE__)->Instance->SR) = ~(__INTERRUPT__))
  
  /**
    * @}
    */ 
  
  /* Exported functions --------------------------------------------------------*/
  /** @defgroup RNG_Exported_Functions RNG Exported Functions
    * @{
    */
  
  /** @defgroup RNG_Exported_Functions_Group1 Initialization and de-initialization functions
    * @{
    */  
  HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng);
  HAL_StatusTypeDef HAL_RNG_DeInit (RNG_HandleTypeDef *hrng);
  void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng);
  void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng);
  
  /**
    * @}
    */ 
  
  /** @defgroup RNG_Exported_Functions_Group2 Peripheral Control functions
    * @{
    */
  uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng);    /* Obsolete, use HAL_RNG_GenerateRandomNumber() instead    */
  uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng); /* Obsolete, use HAL_RNG_GenerateRandomNumber_IT() instead */
  
  HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit);
  HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng);
  uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng);
  
  void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng);
  void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng);
  void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef* hrng, uint32_t random32bit);
  
  /**
    * @}
    */ 
  
  /** @defgroup RNG_Exported_Functions_Group3 Peripheral State functions
    * @{
    */
  HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng);
  
  /**
    * @}
    */
    
  /**
    * @}
    */ 
  
  /* Private types -------------------------------------------------------------*/
  /** @defgroup RNG_Private_Types RNG Private Types
    * @{
    */
  
  /**
    * @}
    */ 
  
  /* Private defines -----------------------------------------------------------*/
  /** @defgroup RNG_Private_Defines RNG Private Defines
    * @{
    */
  
  /**
    * @}
    */ 
            
  /* Private variables ---------------------------------------------------------*/
  /** @defgroup RNG_Private_Variables RNG Private Variables
    * @{
    */
  
  /**
    * @}
    */ 
  
  /* Private constants ---------------------------------------------------------*/
  /** @defgroup RNG_Private_Constants RNG Private Constants
    * @{
    */
  
  /**
    * @}
    */ 
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup RNG_Private_Macros RNG Private Macros
    * @{
    */
  #define IS_RNG_IT(IT) (((IT) == RNG_IT_CEI) || \
                         ((IT) == RNG_IT_SEI))
  
  #define IS_RNG_FLAG(FLAG) (((FLAG) == RNG_FLAG_DRDY) || \
                             ((FLAG) == RNG_FLAG_CECS) || \
                             ((FLAG) == RNG_FLAG_SECS))
  
  /**
    * @}
    */ 
  
  /* Private functions prototypes ----------------------------------------------*/
  /** @defgroup RNG_Private_Functions_Prototypes RNG Private Functions Prototypes
    * @{
    */
  
  /**
    * @}
    */
  
  /* Private functions ---------------------------------------------------------*/
  /** @defgroup RNG_Private_Functions RNG Private Functions
    * @{
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */ 
  
  /**
    * @}
    */ 
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32F7xx_HAL_RNG_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  