/**
  ******************************************************************************
  * @file    stm32l4xx_hal_rng.h
  * @author  MCD Application Team
  * @brief   Header file of RNG HAL module.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2017 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 __STM32L4xx_HAL_RNG_H
#define __STM32L4xx_HAL_RNG_H

#ifdef __cplusplus
 extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx_hal_def.h"

/** @addtogroup STM32L4xx_HAL_Driver
  * @{
  */

/** @addtogroup RNG
  * @{
  */ 

/* Exported types ------------------------------------------------------------*/ 
/** @defgroup RNG_Exported_Types RNG Exported Types
  * @{
  */

#if defined(RNG_CR_CED)
/**
  * @brief  RNG Configuration Structure definition
  */
typedef struct
{
  uint32_t                    ClockErrorDetection; /*!< Clock error detection */
}RNG_InitTypeDef;
#endif /* defined(RNG_CR_CED) */

/** 
  * @brief  RNG HAL 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;

/** 
  * @brief  RNG Handle Structure definition  
  */ 
typedef struct
{
  RNG_TypeDef                 *Instance;  /*!< Register base address        */

#if defined(RNG_CR_CED)
  RNG_InitTypeDef             Init;       /*!< RNG configuration parameters */
#endif /* defined(RNG_CR_CED) */

  HAL_LockTypeDef             Lock;       /*!< RNG locking object           */

  __IO HAL_RNG_StateTypeDef   State;      /*!< RNG communication state      */

  uint32_t               RandomNumber;    /*!< Last Generated RNG Data */

}RNG_HandleTypeDef;

/** 
  * @}
  */

/* Exported constants --------------------------------------------------------*/
/** @defgroup RNG_Exported_Constants RNG Exported Constants
  * @{
  */

/** @defgroup RNG_Interrupt_definition  RNG Interrupts 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_Flag_definition  RNG Flags 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  */
/**
  * @}
  */

#if defined(RNG_CR_CED)
/** @defgroup RNG_Clock_Error_Detection RNG Clock Error Detection
  * @{
  */
#define RNG_CED_ENABLE         ((uint32_t)0x00000000) /*!< Clock error detection enabled  */
#define RNG_CED_DISABLE        RNG_CR_CED             /*!< Clock error detection disabled */
/**
  * @}
  */
#endif /* defined(RNG_CR_CED) */

/**
  * @}
  */ 
  
/* 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  Enable the RNG peripheral.
  * @param  __HANDLE__: RNG Handle
  * @retval None
  */
#define __HAL_RNG_ENABLE(__HANDLE__) ((__HANDLE__)->Instance->CR |=  RNG_CR_RNGEN)

/**
  * @brief  Disable the RNG peripheral.
  * @param  __HANDLE__: RNG Handle
  * @retval None
  */
#define __HAL_RNG_DISABLE(__HANDLE__) ((__HANDLE__)->Instance->CR &= ~RNG_CR_RNGEN)

/**
  * @brief  Check whether the specified RNG flag is set or not.
  * @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  Clear 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  Enable the RNG interrupt.
  * @param  __HANDLE__: RNG Handle
  * @retval None
  */
#define __HAL_RNG_ENABLE_IT(__HANDLE__) ((__HANDLE__)->Instance->CR |=  RNG_CR_IE)

/**
  * @brief  Disable the RNG interrupt.
  * @param  __HANDLE__: RNG Handle
  * @retval None
  */
#define __HAL_RNG_DISABLE_IT(__HANDLE__) ((__HANDLE__)->Instance->CR &= ~RNG_CR_IE)

/**
  * @brief  Check 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
  * @{
  */

/* Initialization and de-initialization 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);
/**
  * @}
  */ 

/* Peripheral Control functions  ************************************************/
/** @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);
/**
  * @}
  */ 

/* Peripheral State functions  **************************************************/
/** @defgroup RNG_Exported_Functions_Group3 Peripheral State functions
  * @{
  */
HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng);
/**
  * @}
  */
  
/**
  * @}
  */

/* Private types -------------------------------------------------------------*/
/* Private defines -----------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup  RNG_Private_Macros   RNG Private Macros
  * @{
  */

#if defined(RNG_CR_CED)
/**
  * @brief Verify the RNG Clock Error Detection mode.
  * @param __MODE__: RNG Clock Error Detection mode
  * @retval SET (__MODE__ is valid) or RESET (__MODE__ is invalid)
  */
#define IS_RNG_CED(__MODE__) (((__MODE__) == RNG_CED_ENABLE) || \
                              ((__MODE__) == RNG_CED_DISABLE))
#endif /* defined(RNG_CR_CED) */

/**
  * @}
  */
/* Private functions prototypes ----------------------------------------------*/

/**
  * @}
  */ 

/**
  * @}
  */ 

#ifdef __cplusplus
}
#endif

#endif /* __STM32L4xx_HAL_RNG_H */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
