text: /**
    ******************************************************************************
    * @file    stm32f0xx_ll_crc.c
    * @author  MCD Application Team
    * @brief   CRC LL module driver.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; Copyright (c) 2016 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 "stm32f0xx_ll_crc.h"
  #include "stm32f0xx_ll_bus.h"
  
  #ifdef  USE_FULL_ASSERT
  #include "stm32_assert.h"
  #else
  #define assert_param(expr) ((void)0U)
  #endif /* USE_FULL_ASSERT */
  
  /** @addtogroup STM32F0xx_LL_Driver
    * @{
    */
  
  #if defined (CRC)
  
  /** @addtogroup CRC_LL
    * @{
    */
  
  /* Private types -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private constants ---------------------------------------------------------*/
  /* Private macros ------------------------------------------------------------*/
  /* Private function prototypes -----------------------------------------------*/
  
  /* Exported functions --------------------------------------------------------*/
  /** @addtogroup CRC_LL_Exported_Functions
    * @{
    */
  
  /** @addtogroup CRC_LL_EF_Init
    * @{
    */
  
  /**
    * @brief  De-initialize CRC registers (Registers restored to their default values).
    * @param  CRCx CRC Instance
    * @retval An ErrorStatus enumeration value:
    *          - SUCCESS: CRC registers are de-initialized
    *          - ERROR: CRC registers are not de-initialized
    */
  ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
  {
    ErrorStatus status = SUCCESS;
  
    /* Check the parameters */
    assert_param(IS_CRC_ALL_INSTANCE(CRCx));
  
    if (CRCx == CRC)
    {
  #if defined(CRC_POL_POL)
      /* Set programmable polynomial size in CR register to reset value (32 bits)*/
      LL_CRC_SetPolynomialSize(CRCx, LL_CRC_POLYLENGTH_32B);
  
      /* Set programmable polynomial in POL register to reset value */
      LL_CRC_SetPolynomialCoef(CRCx, LL_CRC_DEFAULT_CRC32_POLY);
  #endif /* CRC_POL_POL */
  
      /* Set INIT register to reset value */
      LL_CRC_SetInitialData(CRCx, LL_CRC_DEFAULT_CRC_INITVALUE);
  
      /* Set Reversibility options on I/O data values in CR register to reset value */
      LL_CRC_SetInputDataReverseMode(CRCx, LL_CRC_INDATA_REVERSE_NONE);
      LL_CRC_SetOutputDataReverseMode(CRCx, LL_CRC_OUTDATA_REVERSE_NONE);
  
      /* Reset the CRC calculation unit */
      LL_CRC_ResetCRCCalculationUnit(CRCx);
  
      /* Reset IDR register */
      LL_CRC_Write_IDR(CRCx, 0x00U);
    }
    else
    {
      status = ERROR;
    }
  
    return (status);
  }
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #endif /* defined (CRC) */
  
  /**
    * @}
    */
  
  #endif /* USE_FULL_LL_DRIVER */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  
  