text: /**
    ******************************************************************************
    * @file    stm32f7xx_hal_crc.h
    * @author  MCD Application Team
    * @version V1.1.1
    * @date    01-July-2016
    * @brief   Header file of CRC HAL module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2016 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_CRC_H
  #define __STM32F7xx_HAL_CRC_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f7xx_hal_def.h"
  
  /** @addtogroup STM32F7xx_HAL_Driver
    * @{
    */
  
  /** @defgroup CRC CRC
    * @brief CRC HAL module driver
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /** @defgroup CRC_Exported_Types CRC Exported Types
    * @{
    */
  
  /** @defgroup CRC_Exported_Types_Group1 CRC State Structure definition 
    * @{
    */
  typedef enum
  {
    HAL_CRC_STATE_RESET     = 0x00U,  /*!< CRC not yet initialized or disabled */
    HAL_CRC_STATE_READY     = 0x01U,  /*!< CRC initialized and ready for use   */
    HAL_CRC_STATE_BUSY      = 0x02U,  /*!< CRC internal process is ongoing     */
    HAL_CRC_STATE_TIMEOUT   = 0x03U,  /*!< CRC timeout state                   */
    HAL_CRC_STATE_ERROR     = 0x04U   /*!< CRC error state                     */
  }HAL_CRC_StateTypeDef;
  /** 
    * @}
    */
  
  /** @defgroup CRC_Exported_Types_Group2 CRC Init Structure definition  
    * @{
    */
  typedef struct
  {
    uint8_t DefaultPolynomialUse;       /*!< This parameter is a value of @ref CRC_Default_Polynomial and indicates if default polynomial is used.  
                                              If set to DEFAULT_POLYNOMIAL_ENABLE, resort to default 
                                              X^32 + X^26 + X^23 + X^22 + X^16 + X^12 + X^11 + X^10 +X^8 + X^7 + X^5 + X^4 + X^2+ X +1. 
                                              In that case, there is no need to set GeneratingPolynomial field.
                                              If otherwise set to DEFAULT_POLYNOMIAL_DISABLE, GeneratingPolynomial and CRCLength fields must be set */
  
    uint8_t DefaultInitValueUse;        /*!< This parameter is a value of @ref CRC_Default_InitValue_Use and indicates if default init value is used. 
                                             If set to DEFAULT_INIT_VALUE_ENABLE, resort to default
                                             0xFFFFFFFF value. In that case, there is no need to set InitValue field.   
                                             If otherwise set to DEFAULT_INIT_VALUE_DISABLE,  InitValue field must be set */
  
    uint32_t GeneratingPolynomial;      /*!< Set CRC generating polynomial. 7, 8, 16 or 32-bit long value for a polynomial degree
                                             respectively equal to 7, 8, 16 or 32. This field is written in normal representation, 
                                             e.g., for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65.
                                             No need to specify it if DefaultPolynomialUse is set to DEFAULT_POLYNOMIAL_ENABLE   */                                                
  
    uint32_t CRCLength;                 /*!< This parameter is a value of @ref CRC_Polynomial_Sizes and indicates CRC length.
                                             Value can be either one of
                                             CRC_POLYLENGTH_32B                  (32-bit CRC)
                                             CRC_POLYLENGTH_16B                  (16-bit CRC)
                                             CRC_POLYLENGTH_8B                   (8-bit CRC)
                                             CRC_POLYLENGTH_7B                   (7-bit CRC) */
                                                
    uint32_t InitValue;                 /*!< Init value to initiate CRC computation. No need to specify it if DefaultInitValueUse 
                                             is set to DEFAULT_INIT_VALUE_ENABLE   */                                                
    
    uint32_t InputDataInversionMode;    /*!< This parameter is a value of @ref CRCEx_Input_Data_Inversion and specifies input data inversion mode. 
                                             Can be either one of the following values 
                                             CRC_INPUTDATA_INVERSION_NONE      no input data inversion
                                             CRC_INPUTDATA_INVERSION_BYTE      byte-wise inversion, 0x1A2B3C4D becomes 0x58D43CB2
                                             CRC_INPUTDATA_INVERSION_HALFWORD  halfword-wise inversion, 0x1A2B3C4D becomes 0xD458B23C
                                             CRC_INPUTDATA_INVERSION_WORD      word-wise inversion, 0x1A2B3C4D becomes 0xB23CD458 */  
                                                
    uint32_t OutputDataInversionMode;   /*!< This parameter is a value of @ref CRCEx_Output_Data_Inversion and specifies output data (i.e. CRC) inversion mode.
                                              Can be either 
                                              CRC_OUTPUTDATA_INVERSION_DISABLE   no CRC inversion, or
                                              CRC_OUTPUTDATA_INVERSION_ENABLE    CRC 0x11223344 is converted into 0x22CC4488 */
  }CRC_InitTypeDef;
  /** 
    * @}
    */
    
  /** @defgroup CRC_Exported_Types_Group3 CRC Handle Structure definition   
    * @{
    */
  typedef struct
  {
    CRC_TypeDef                 *Instance;   /*!< Register base address        */ 
    
    CRC_InitTypeDef             Init;        /*!< CRC configuration parameters */
    
    HAL_LockTypeDef             Lock;        /*!< CRC Locking object           */
      
    __IO HAL_CRC_StateTypeDef   State;       /*!< CRC communication state      */
    
    uint32_t InputDataFormat;                /*!< This parameter is a value of @ref CRC_Input_Buffer_Format and specifies input data format. 
                                              Can be either 
                                              CRC_INPUTDATA_FORMAT_BYTES       input data is a stream of bytes (8-bit data)
                                              CRC_INPUTDATA_FORMAT_HALFWORDS   input data is a stream of half-words (16-bit data)
                                              CRC_INPUTDATA_FORMAT_WORDS       input data is a stream of words (32-bits data)                                                                                        
                                             Note that constant CRC_INPUT_FORMAT_UNDEFINED is defined but an initialization error
                                             must occur if InputBufferFormat is not one of the three values listed above  */ 
  }CRC_HandleTypeDef;
  /** 
    * @}
    */
  
  /**
    * @}
    */ 
    
  /* Exported constants --------------------------------------------------------*/
  /** @defgroup CRC_Exported_Constants   CRC exported constants
    * @{
    */
    
  /** @defgroup CRC_Default_Polynomial_Value    Default CRC generating polynomial
    * @{
    */
  #define DEFAULT_CRC32_POLY      0x04C11DB7U
  
  /**
    * @}
    */
  
  /** @defgroup CRC_Default_InitValue    Default CRC computation initialization value
    * @{
    */
  #define DEFAULT_CRC_INITVALUE   0xFFFFFFFFU
  
  /**
    * @}
    */
  
  /** @defgroup CRC_Default_Polynomial    Indicates whether or not default polynomial is used
    * @{
    */
  #define DEFAULT_POLYNOMIAL_ENABLE       ((uint8_t)0x00U)
  #define DEFAULT_POLYNOMIAL_DISABLE      ((uint8_t)0x01U)
  
  
  /**
    * @}
    */
   
  /** @defgroup CRC_Default_InitValue_Use    Indicates whether or not default init value is used
    * @{
    */                                      
  #define DEFAULT_INIT_VALUE_ENABLE      ((uint8_t)0x00U)
  #define DEFAULT_INIT_VALUE_DISABLE     ((uint8_t)0x01U)
  
  /**
    * @}
    */
  
  /** @defgroup CRC_Polynomial_Sizes Polynomial sizes to configure the IP
    * @{
    */
  #define CRC_POLYLENGTH_32B                  ((uint32_t)0x00000000U)
  #define CRC_POLYLENGTH_16B                  ((uint32_t)CRC_CR_POLYSIZE_0)
  #define CRC_POLYLENGTH_8B                   ((uint32_t)CRC_CR_POLYSIZE_1)
  #define CRC_POLYLENGTH_7B                   ((uint32_t)CRC_CR_POLYSIZE)
  /**
    * @}
    */
  
  /** @defgroup CRC_Polynomial_Size_Definitions CRC polynomial possible sizes actual definitions
    * @{
    */
  #define HAL_CRC_LENGTH_32B     32U
  #define HAL_CRC_LENGTH_16B     16U
  #define HAL_CRC_LENGTH_8B       8U
  #define HAL_CRC_LENGTH_7B       7U
  
  /**
    * @}
    */  
  
  /** @defgroup CRC_Input_Buffer_Format CRC input buffer format
    * @{
    */
  /* WARNING: CRC_INPUT_FORMAT_UNDEFINED is created for reference purposes but
   * an error is triggered in HAL_CRC_Init() if InputDataFormat field is set 
   * to CRC_INPUT_FORMAT_UNDEFINED: the format MUST be defined by the user for 
   * the CRC APIs to provide a correct result */   
  #define CRC_INPUTDATA_FORMAT_UNDEFINED             ((uint32_t)0x00000000U)
  #define CRC_INPUTDATA_FORMAT_BYTES                 ((uint32_t)0x00000001U)
  #define CRC_INPUTDATA_FORMAT_HALFWORDS             ((uint32_t)0x00000002U)
  #define CRC_INPUTDATA_FORMAT_WORDS                 ((uint32_t)0x00000003U)
  /** 
    * @}
    */   
  
  /** 
    * @}
    */ 
  /* Exported macros -----------------------------------------------------------*/
  
  /** @defgroup CRC_Exported_Macros CRC exported macros
    * @{
    */
  
  /** @brief Reset CRC handle state
    * @param  __HANDLE__: CRC handle.
    * @retval None
    */
  #define __HAL_CRC_RESET_HANDLE_STATE(__HANDLE__) ((__HANDLE__)->State = HAL_CRC_STATE_RESET)
  
  /**
    * @brief  Reset CRC Data Register.
    * @param  __HANDLE__: CRC handle
    * @retval None.
    */
  #define __HAL_CRC_DR_RESET(__HANDLE__) ((__HANDLE__)->Instance->CR |= CRC_CR_RESET)
  
  /**
    * @brief  Set CRC INIT non-default value
    * @param  __HANDLE__    : CRC handle
    * @param  __INIT__      : 32-bit initial value  
    * @retval None.
    */
  #define __HAL_CRC_INITIALCRCVALUE_CONFIG(__HANDLE__, __INIT__) ((__HANDLE__)->Instance->INIT = (__INIT__))    
  
  /**
    * @brief Stores a 8-bit data in the Independent Data(ID) register.
    * @param __HANDLE__: CRC handle
    * @param __VALUE__: 8-bit value to be stored in the ID register
    * @retval None
    */
  #define __HAL_CRC_SET_IDR(__HANDLE__, __VALUE__) (WRITE_REG((__HANDLE__)->Instance->IDR, CRC_IDR_IDR, (__VALUE__)))
  
  /**
    * @brief Returns the 8-bit data stored in the Independent Data(ID) register.
    * @param __HANDLE__: CRC handle
    * @retval 8-bit value of the ID register 
    */
  #define __HAL_CRC_GET_IDR(__HANDLE__) (((__HANDLE__)->Instance->IDR) & CRC_IDR_IDR)
  /**
    * @}
    */
  
  
  /* Include CRC HAL Extension module */
  #include "stm32f7xx_hal_crc_ex.h"
  
  /* Exported functions --------------------------------------------------------*/
  /** @defgroup CRC_Exported_Functions CRC Exported Functions
    * @{
    */
  
  /** @defgroup CRC_Exported_Functions_Group1 Initialization/de-initialization functions
    * @{
    */
  /* Initialization and de-initialization functions  ****************************/
  HAL_StatusTypeDef HAL_CRC_Init(CRC_HandleTypeDef *hcrc);
  HAL_StatusTypeDef HAL_CRC_DeInit (CRC_HandleTypeDef *hcrc);
  void HAL_CRC_MspInit(CRC_HandleTypeDef *hcrc);
  void HAL_CRC_MspDeInit(CRC_HandleTypeDef *hcrc);
  /**
    * @}
    */
  
  /* Aliases for inter STM32 series compatibility */
  #define HAL_CRC_Input_Data_Reverse   HAL_CRCEx_Input_Data_Reverse
  #define HAL_CRC_Output_Data_Reverse  HAL_CRCEx_Output_Data_Reverse
  
  /** @defgroup CRC_Exported_Functions_Group2 Peripheral Control functions
    * @{
    */
  /* Peripheral Control functions ***********************************************/
  uint32_t HAL_CRC_Accumulate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength);
  uint32_t HAL_CRC_Calculate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength);
  /**
    * @}
    */
  
  /** @defgroup CRC_Exported_Functions_Group3 Peripheral State functions
    * @{
    */
  /* Peripheral State and Error functions ***************************************/
  HAL_CRC_StateTypeDef HAL_CRC_GetState(CRC_HandleTypeDef *hcrc);
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  
  /* Private types -------------------------------------------------------------*/
  /** @defgroup CRC_Private_Types CRC Private Types
    * @{
    */
  
  /**
    * @}
    */ 
  
  /* Private defines -----------------------------------------------------------*/
  /** @defgroup CRC_Private_Defines CRC Private Defines
    * @{
    */
  
  /**
    * @}
    */ 
  
  /* Private variables ---------------------------------------------------------*/
  /** @defgroup CRC_Private_Variables CRC Private Variables
    * @{
    */
  
  /**
    * @}
    */ 
  
  /* Private constants ---------------------------------------------------------*/
  /** @defgroup CRC_Private_Constants CRC Private Constants
    * @{
    */
  
  /**
    * @}
    */ 
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup CRC_Private_Macros CRC Private Macros
    * @{
    */
  #define IS_DEFAULT_POLYNOMIAL(__DEFAULT__) (((__DEFAULT__) == DEFAULT_POLYNOMIAL_ENABLE) || \
                                              ((__DEFAULT__) == DEFAULT_POLYNOMIAL_DISABLE))
  #define IS_DEFAULT_INIT_VALUE(__VALUE__)  (((__VALUE__) == DEFAULT_INIT_VALUE_ENABLE) || \
                                             ((__VALUE__) == DEFAULT_INIT_VALUE_DISABLE))
  #define IS_CRC_POL_LENGTH(__LENGTH__)     (((__LENGTH__) == CRC_POLYLENGTH_32B) || \
                                             ((__LENGTH__) == CRC_POLYLENGTH_16B) || \
                                             ((__LENGTH__) == CRC_POLYLENGTH_8B)  || \
                                             ((__LENGTH__) == CRC_POLYLENGTH_7B))
  #define IS_CRC_INPUTDATA_FORMAT(__FORMAT__)       (((__FORMAT__) == CRC_INPUTDATA_FORMAT_BYTES) || \
                                                     ((__FORMAT__) == CRC_INPUTDATA_FORMAT_HALFWORDS) || \
                                                     ((__FORMAT__) == CRC_INPUTDATA_FORMAT_WORDS))
  
  
  /**
    * @}
    */
  
  /* Private functions prototypes ----------------------------------------------*/
  /** @defgroup CRC_Private_Functions_Prototypes CRC Private Functions Prototypes
    * @{
    */
  
  /**
    * @}
    */
  
  /* Private functions ---------------------------------------------------------*/
  /** @defgroup CRC_Private_Functions CRC Private Functions
    * @{
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */ 
  
  /**
    * @}
    */
    
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32F7xx_HAL_CRC_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  
  