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 /**
   ******************************************************************************
   * @file    stm32l1xx_hal_crc.c
   * @author  MCD Application Team
   * @brief   CRC HAL module driver.
   *          This file provides firmware functions to manage the following
   *          functionalities of the Cyclic Redundancy Check (CRC) peripheral:
   *           + Initialization and de-initialization functions
   *           + Peripheral Control functions
   *           + Peripheral State functions
   *
-  @verbatim
+  ******************************************************************************
- ===============================================================================
+  * @attention
-                     ##### How to use this driver #####
+  *
- ===============================================================================
+  * Copyright (c) 2017 STMicroelectronics.
-    [..]
+  * All rights reserved.
-         (+) Enable CRC AHB clock using __HAL_RCC_CRC_CLK_ENABLE();
+  *
-         (+) Initialize CRC calculator
+  * This software is licensed under terms that can be found in the LICENSE file
-             (++) specify generating polynomial (peripheral default or non-default one)
+  * in the root directory of this software component.
-             (++) specify initialization value (peripheral default or non-default one)
+  * If no LICENSE file comes with this software, it is provided AS-IS.
-             (++) specify input data format
+  *
-             (++) specify input or output data inversion mode if any
+  ******************************************************************************
-         (+) Use HAL_CRC_Accumulate() function to compute the CRC value of the
+  @verbatim
-             input data buffer starting with the previously computed CRC as
+ ===============================================================================
-             initialization value
+                     ##### How to use this driver #####
-         (+) Use HAL_CRC_Calculate() function to compute the CRC value of the
+ ===============================================================================
-             input data buffer starting with the defined initialization value
+    [..]
-             (default or non-default) to initiate CRC calculation
+         (+) Enable CRC AHB clock using __HAL_RCC_CRC_CLK_ENABLE();
+         (+) Initialize CRC calculator
-  @endverbatim
+             (++) specify generating polynomial (peripheral default or non-default one)
-  ******************************************************************************
+             (++) specify initialization value (peripheral default or non-default one)
-  * @attention
+             (++) specify input data format
-  *
+             (++) specify input or output data inversion mode if any
-  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
+         (+) Use HAL_CRC_Accumulate() function to compute the CRC value of the
-  * All rights reserved.</center></h2>
+             input data buffer starting with the previously computed CRC as
-  *
+             initialization value
-  * This software component is licensed by ST under BSD 3-Clause license,
+         (+) Use HAL_CRC_Calculate() function to compute the CRC value of the
-  * the "License"; You may not use this file except in compliance with the
+             input data buffer starting with the defined initialization value
-  * License. You may obtain a copy of the License at:
+             (default or non-default) to initiate CRC calculation
-  *                        opensource.org/licenses/BSD-3-Clause
-  *
+  @endverbatim
   ******************************************************************************
   */
 /* Includes ------------------------------------------------------------------*/
 #include "stm32l1xx_hal.h"
 /** @addtogroup STM32L1xx_HAL_Driver
   * @{
   */
 /** @defgroup CRC CRC
   * @brief CRC HAL module driver.
   * @{
   */
 #ifdef HAL_CRC_MODULE_ENABLED
 /* Private typedef -----------------------------------------------------------*/
 /* Private define ------------------------------------------------------------*/
 /* Private macro -------------------------------------------------------------*/
 /* Private variables ---------------------------------------------------------*/
 /* Private function prototypes -----------------------------------------------*/
 /* Exported functions --------------------------------------------------------*/
 /** @defgroup CRC_Exported_Functions CRC Exported Functions
   * @{
   */
 /** @defgroup CRC_Exported_Functions_Group1 Initialization and de-initialization functions
   *  @brief    Initialization and Configuration functions.
   *
 @verbatim
  ===============================================================================
             ##### Initialization and de-initialization functions #####
  ===============================================================================
     [..]  This section provides functions allowing to:
       (+) Initialize the CRC according to the specified parameters
           in the CRC_InitTypeDef and create the associated handle
       (+) DeInitialize the CRC peripheral
       (+) Initialize the CRC MSP (MCU Specific Package)
       (+) DeInitialize the CRC MSP
 @endverbatim
   * @{
   */
 /**
   * @brief  Initialize the CRC according to the specified
   *         parameters in the CRC_InitTypeDef and create the associated handle.
   * @param  hcrc CRC handle
   * @retval HAL status
   */
 HAL_StatusTypeDef HAL_CRC_Init(CRC_HandleTypeDef *hcrc)
 {
   /* Check the CRC handle allocation */
   if (hcrc == NULL)
   {
     return HAL_ERROR;
   }
   /* Check the parameters */
   assert_param(IS_CRC_ALL_INSTANCE(hcrc->Instance));
   if (hcrc->State == HAL_CRC_STATE_RESET)
   {
     /* Allocate lock resource and initialize it */
     hcrc->Lock = HAL_UNLOCKED;
     /* Init the low level hardware */
     HAL_CRC_MspInit(hcrc);
   }
   /* Change CRC peripheral state */
   hcrc->State = HAL_CRC_STATE_READY;
   /* Return function status */
   return HAL_OK;
 }
 /**
   * @brief  DeInitialize the CRC peripheral.
   * @param  hcrc CRC handle
   * @retval HAL status
   */
 HAL_StatusTypeDef HAL_CRC_DeInit(CRC_HandleTypeDef *hcrc)
 {
   /* Check the CRC handle allocation */
   if (hcrc == NULL)
   {
     return HAL_ERROR;
   }
   /* Check the parameters */
   assert_param(IS_CRC_ALL_INSTANCE(hcrc->Instance));
   /* Check the CRC peripheral state */
   if (hcrc->State == HAL_CRC_STATE_BUSY)
   {
     return HAL_BUSY;
   }
   /* Change CRC peripheral state */
   hcrc->State = HAL_CRC_STATE_BUSY;
   /* Reset CRC calculation unit */
   __HAL_CRC_DR_RESET(hcrc);
   /* Reset IDR register content */
-  CLEAR_BIT(hcrc->Instance->IDR, CRC_IDR_IDR);
+  __HAL_CRC_SET_IDR(hcrc, 0);
   /* DeInit the low level hardware */
   HAL_CRC_MspDeInit(hcrc);
   /* Change CRC peripheral state */
   hcrc->State = HAL_CRC_STATE_RESET;
   /* Process unlocked */
   __HAL_UNLOCK(hcrc);
   /* Return function status */
   return HAL_OK;
 }
 /**
   * @brief  Initializes the CRC MSP.
   * @param  hcrc CRC handle
   * @retval None
   */
 __weak void HAL_CRC_MspInit(CRC_HandleTypeDef *hcrc)
 {
   /* Prevent unused argument(s) compilation warning */
   UNUSED(hcrc);
   /* NOTE : This function should not be modified, when the callback is needed,
             the HAL_CRC_MspInit can be implemented in the user file
    */
 }
 /**
   * @brief  DeInitialize the CRC MSP.
   * @param  hcrc CRC handle
   * @retval None
   */
 __weak void HAL_CRC_MspDeInit(CRC_HandleTypeDef *hcrc)
 {
   /* Prevent unused argument(s) compilation warning */
   UNUSED(hcrc);
   /* NOTE : This function should not be modified, when the callback is needed,
             the HAL_CRC_MspDeInit can be implemented in the user file
    */
 }
 /**
   * @}
   */
 /** @defgroup CRC_Exported_Functions_Group2 Peripheral Control functions
   *  @brief    management functions.
   *
 @verbatim
  ===============================================================================
                       ##### Peripheral Control functions #####
  ===============================================================================
     [..]  This section provides functions allowing to:
       (+) compute the 32-bit CRC value of a 32-bit data buffer
           using combination of the previous CRC value and the new one.
        [..]  or
       (+) compute the 32-bit CRC value of a 32-bit data buffer
           independently of the previous CRC value.
 @endverbatim
   * @{
   */
 /**
   * @brief  Compute the 32-bit CRC value of a 32-bit data buffer
   *         starting with the previously computed CRC as initialization value.
   * @param  hcrc CRC handle
   * @param  pBuffer pointer to the input data buffer.
   * @param  BufferLength input data buffer length (number of uint32_t words).
   * @retval uint32_t CRC (returned value LSBs for CRC shorter than 32 bits)
   */
 uint32_t HAL_CRC_Accumulate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength)
 {
   uint32_t index;      /* CRC input data buffer index */
   uint32_t temp = 0U;  /* CRC output (read from hcrc->Instance->DR register) */
   /* Change CRC peripheral state */
   hcrc->State = HAL_CRC_STATE_BUSY;
   /* Enter Data to the CRC calculator */
   for (index = 0U; index < BufferLength; index++)
   {
     hcrc->Instance->DR = pBuffer[index];
   }
   temp = hcrc->Instance->DR;
   /* Change CRC peripheral state */
   hcrc->State = HAL_CRC_STATE_READY;
   /* Return the CRC computed value */
   return temp;
 }
 /**
   * @brief  Compute the 32-bit CRC value of a 32-bit data buffer
   *         starting with hcrc->Instance->INIT as initialization value.
   * @param  hcrc CRC handle
   * @param  pBuffer pointer to the input data buffer.
   * @param  BufferLength input data buffer length (number of uint32_t words).
   * @retval uint32_t CRC (returned value LSBs for CRC shorter than 32 bits)
   */
 uint32_t HAL_CRC_Calculate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength)
 {
   uint32_t index;      /* CRC input data buffer index */
   uint32_t temp = 0U;  /* CRC output (read from hcrc->Instance->DR register) */
   /* Change CRC peripheral state */
   hcrc->State = HAL_CRC_STATE_BUSY;
   /* Reset CRC Calculation Unit (hcrc->Instance->INIT is
   *  written in hcrc->Instance->DR) */
   __HAL_CRC_DR_RESET(hcrc);
   /* Enter 32-bit input data to the CRC calculator */
   for (index = 0U; index < BufferLength; index++)
   {
     hcrc->Instance->DR = pBuffer[index];
   }
   temp = hcrc->Instance->DR;
   /* Change CRC peripheral state */
   hcrc->State = HAL_CRC_STATE_READY;
   /* Return the CRC computed value */
   return temp;
 }
 /**
   * @}
   */
 /** @defgroup CRC_Exported_Functions_Group3 Peripheral State functions
   *  @brief    Peripheral State functions.
   *
 @verbatim
  ===============================================================================
                       ##### Peripheral State functions #####
  ===============================================================================
     [..]
     This subsection permits to get in run-time the status of the peripheral.
 @endverbatim
   * @{
   */
 /**
   * @brief  Return the CRC handle state.
   * @param  hcrc CRC handle
   * @retval HAL state
   */
-HAL_CRC_StateTypeDef HAL_CRC_GetState(CRC_HandleTypeDef *hcrc)
+HAL_CRC_StateTypeDef HAL_CRC_GetState(const CRC_HandleTypeDef *hcrc)
 {
   /* Return CRC handle state */
   return hcrc->State;
 }
 /**
   * @}
   */
 /**
   * @}
   */
 #endif /* HAL_CRC_MODULE_ENABLED */
 /**
   * @}
   */
 /**
   * @}
   */
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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