text: /**
    ******************************************************************************
    * @file    stm32l5xx_ll_rng.c
    * @author  MCD Application Team
    * @brief   RNG LL module driver.
    ******************************************************************************
    * @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
    *
    ******************************************************************************
    */
  #if defined(USE_FULL_LL_DRIVER)
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32l5xx_ll_rng.h"
  #include "stm32l5xx_ll_bus.h"
  
  #ifdef  USE_FULL_ASSERT
  #include "stm32_assert.h"
  #else
  #define assert_param(expr) ((void)0U)
  #endif
  
  /** @addtogroup STM32L5xx_LL_Driver
    * @{
    */
  
  #if defined (RNG)
  
  /** @addtogroup RNG_LL
    * @{
    */
  
  /* Private types -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private constants ---------------------------------------------------------*/
  /* Private macros ------------------------------------------------------------*/
  /** @addtogroup RNG_LL_Private_Macros
    * @{
    */
  #define IS_LL_RNG_CED(__MODE__) (((__MODE__) == LL_RNG_CED_ENABLE) || \
                                   ((__MODE__) == LL_RNG_CED_DISABLE))
  
  #define IS_LL_RNG_CLOCK_DIVIDER(__CLOCK_DIV__) ((__CLOCK_DIV__) <=0x0Fu)
  
  
  #define IS_LL_RNG_NIST_COMPLIANCE(__NIST_COMPLIANCE__) (((__NIST_COMPLIANCE__) == LL_RNG_NIST_COMPLIANT) || \
                                                       ((__NIST_COMPLIANCE__) == LL_RNG_NOTNIST_COMPLIANT))
  
  #define IS_LL_RNG_CONFIG1 (__CONFIG1__) ((__CONFIG1__) <= 0x3FUL)
  
  #define IS_LL_RNG_CONFIG2 (__CONFIG2__) ((__CONFIG2__) <= 0x07UL)
  
  #define IS_LL_RNG_CONFIG3 (__CONFIG3__) ((__CONFIG3__) <= 0xFUL)
  /**
    * @}
    */
  /* Private function prototypes -----------------------------------------------*/
  
  /* Exported functions --------------------------------------------------------*/
  /** @addtogroup RNG_LL_Exported_Functions
    * @{
    */
  
  /** @addtogroup RNG_LL_EF_Init
    * @{
    */
  
  /**
    * @brief  De-initialize RNG registers (Registers restored to their default values).
    * @param  RNGx RNG Instance
    * @retval An ErrorStatus enumeration value:
    *          - SUCCESS: RNG registers are de-initialized
    *          - ERROR: not applicable
    */
  ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
  {
    /* Check the parameters */
    assert_param(IS_RNG_ALL_INSTANCE(RNGx));
    /* Enable RNG reset state */
    LL_AHB2_GRP1_ForceReset(LL_AHB2_GRP1_PERIPH_RNG);
  
    /* Release RNG from reset state */
    LL_AHB2_GRP1_ReleaseReset(LL_AHB2_GRP1_PERIPH_RNG);
    return (SUCCESS);
  }
  
  /**
    * @brief  Initialize RNG registers according to the specified parameters in RNG_InitStruct.
    * @param  RNGx RNG Instance
    * @param  RNG_InitStruct pointer to a LL_RNG_InitTypeDef structure
    *         that contains the configuration information for the specified RNG peripheral.
    * @retval An ErrorStatus enumeration value:
    *          - SUCCESS: RNG registers are initialized according to RNG_InitStruct content
    *          - ERROR: not applicable
    */
  ErrorStatus LL_RNG_Init(RNG_TypeDef *RNGx, LL_RNG_InitTypeDef *RNG_InitStruct)
  {
    /* Check the parameters */
    assert_param(IS_RNG_ALL_INSTANCE(RNGx));
    assert_param(IS_LL_RNG_CED(RNG_InitStruct->ClockErrorDetection));
  
    /* Clock Error Detection Configuration when CONDRT bit is set to 1 */
    MODIFY_REG(RNGx->CR, RNG_CR_CED | RNG_CR_CONDRST, RNG_InitStruct->ClockErrorDetection | RNG_CR_CONDRST);
    /* Writing bits CONDRST=0*/
    CLEAR_BIT(RNGx->CR, RNG_CR_CONDRST);
  
    return (SUCCESS);
  }
  
  /**
    * @brief Set each @ref LL_RNG_InitTypeDef field to default value.
    * @param RNG_InitStruct pointer to a @ref LL_RNG_InitTypeDef structure
    *                       whose fields will be set to default values.
    * @retval None
    */
  void LL_RNG_StructInit(LL_RNG_InitTypeDef *RNG_InitStruct)
  {
    /* Set RNG_InitStruct fields to default values */
    RNG_InitStruct->ClockErrorDetection = LL_RNG_CED_ENABLE;
  
  }
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #endif /* RNG */
  
  /**
    * @}
    */
  
  #endif /* USE_FULL_LL_DRIVER */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  
  