text: /**
    ******************************************************************************
    * @file    stm32g0xx_hal_crc.h
    * @author  MCD Application Team
    * @brief   Header file of CRC HAL module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; Copyright (c) 2018 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
    *
    ******************************************************************************
    */
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef STM32G0xx_HAL_CRC_H
  #define STM32G0xx_HAL_CRC_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32g0xx_hal_def.h"
  
  /** @addtogroup STM32G0xx_HAL_Driver
    * @{
    */
  
  /** @addtogroup CRC
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /** @defgroup CRC_Exported_Types CRC Exported Types
    * @{
    */
  
  /**
    * @brief  CRC HAL 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;
  
  /**
    * @brief 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 as a 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
                                             @arg @ref CRC_POLYLENGTH_32B                  (32-bit CRC),
                                             @arg @ref CRC_POLYLENGTH_16B                  (16-bit CRC),
                                             @arg @ref CRC_POLYLENGTH_8B                   (8-bit CRC),
                                             @arg @ref 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
                                             @arg @ref CRC_INPUTDATA_INVERSION_NONE       no input data inversion
                                             @arg @ref CRC_INPUTDATA_INVERSION_BYTE       byte-wise inversion, 0x1A2B3C4D becomes 0x58D43CB2
                                             @arg @ref CRC_INPUTDATA_INVERSION_HALFWORD   halfword-wise inversion, 0x1A2B3C4D becomes 0xD458B23C
                                             @arg @ref 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
                                              @arg @ref CRC_OUTPUTDATA_INVERSION_DISABLE   no CRC inversion,
                                              @arg @ref CRC_OUTPUTDATA_INVERSION_ENABLE    CRC 0x11223344 is converted into 0x22CC4488 */
  } CRC_InitTypeDef;
  
  /**
    * @brief  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
                                              @arg @ref CRC_INPUTDATA_FORMAT_BYTES       input data is a stream of bytes (8-bit data)
                                              @arg @ref CRC_INPUTDATA_FORMAT_HALFWORDS   input data is a stream of half-words (16-bit data)
                                              @arg @ref CRC_INPUTDATA_FORMAT_WORDS       input data is a stream of words (32-bit 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  /*!<  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 */
  /**
    * @}
    */
  
  /** @defgroup CRC_Default_InitValue    Default CRC computation initialization value
    * @{
    */
  #define DEFAULT_CRC_INITVALUE   0xFFFFFFFFU  /*!< Initial CRC default value */
  /**
    * @}
    */
  
  /** @defgroup CRC_Default_Polynomial    Indicates whether or not default polynomial is used
    * @{
    */
  #define DEFAULT_POLYNOMIAL_ENABLE       ((uint8_t)0x00U)  /*!< Enable default generating polynomial 0x04C11DB7  */
  #define DEFAULT_POLYNOMIAL_DISABLE      ((uint8_t)0x01U)  /*!< Disable default generating polynomial 0x04C11DB7 */
  /**
    * @}
    */
  
  /** @defgroup CRC_Default_InitValue_Use    Indicates whether or not default init value is used
    * @{
    */
  #define DEFAULT_INIT_VALUE_ENABLE      ((uint8_t)0x00U) /*!< Enable initial CRC default value  */
  #define DEFAULT_INIT_VALUE_DISABLE     ((uint8_t)0x01U) /*!< Disable initial CRC default value */
  /**
    * @}
    */
  
  /** @defgroup CRC_Polynomial_Sizes Polynomial sizes to configure the peripheral
    * @{
    */
  #define CRC_POLYLENGTH_32B                  0x00000000U        /*!< Resort to a 32-bit long generating polynomial */
  #define CRC_POLYLENGTH_16B                  CRC_CR_POLYSIZE_0  /*!< Resort to a 16-bit long generating polynomial */
  #define CRC_POLYLENGTH_8B                   CRC_CR_POLYSIZE_1  /*!< Resort to a 8-bit long generating polynomial  */
  #define CRC_POLYLENGTH_7B                   CRC_CR_POLYSIZE    /*!< Resort to a 7-bit long generating polynomial  */
  /**
    * @}
    */
  
  /** @defgroup CRC_Polynomial_Size_Definitions CRC polynomial possible sizes actual definitions
    * @{
    */
  #define HAL_CRC_LENGTH_32B     32U          /*!< 32-bit long CRC */
  #define HAL_CRC_LENGTH_16B     16U          /*!< 16-bit long CRC */
  #define HAL_CRC_LENGTH_8B       8U          /*!< 8-bit long CRC  */
  #define HAL_CRC_LENGTH_7B       7U          /*!< 7-bit long CRC  */
  /**
    * @}
    */
  
  /** @defgroup CRC_Input_Buffer_Format 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             0x00000000U  /*!< Undefined input data format    */
  #define CRC_INPUTDATA_FORMAT_BYTES                 0x00000001U  /*!< Input data in byte format      */
  #define CRC_INPUTDATA_FORMAT_HALFWORDS             0x00000002U  /*!< Input data in half-word format */
  #define CRC_INPUTDATA_FORMAT_WORDS                 0x00000003U  /*!< Input data in word format      */
  /**
    * @}
    */
  
  /** @defgroup CRC_Aliases CRC API aliases
    * @{
    */
  #define HAL_CRC_Input_Data_Reverse   HAL_CRCEx_Input_Data_Reverse    /*!< Aliased to HAL_CRCEx_Input_Data_Reverse for inter STM32 series compatibility  */
  #define HAL_CRC_Output_Data_Reverse  HAL_CRCEx_Output_Data_Reverse   /*!< Aliased to HAL_CRCEx_Output_Data_Reverse for inter STM32 series compatibility */
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* 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 Store data in the Independent Data (ID) register.
    * @param __HANDLE__ CRC handle
    * @param __VALUE__  Value to be stored in the ID register
    * @note  Refer to the Reference Manual to get the authorized __VALUE__ length in bits
    * @retval None
    */
  #define __HAL_CRC_SET_IDR(__HANDLE__, __VALUE__) (WRITE_REG((__HANDLE__)->Instance->IDR, (__VALUE__)))
  
  /**
    * @brief Return the data stored in the Independent Data (ID) register.
    * @param __HANDLE__ CRC handle
    * @note  Refer to the Reference Manual to get the authorized __VALUE__ length in bits
    * @retval Value of the ID register
    */
  #define __HAL_CRC_GET_IDR(__HANDLE__) (((__HANDLE__)->Instance->IDR) & CRC_IDR_IDR)
  /**
    * @}
    */
  
  
  /* 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))
  
  /**
    * @}
    */
  
  /* Include CRC HAL Extended module */
  #include "stm32g0xx_hal_crc_ex.h"
  
  /* Exported functions --------------------------------------------------------*/
  /** @defgroup CRC_Exported_Functions CRC Exported Functions
    * @{
    */
  
  /* Initialization and de-initialization functions  ****************************/
  /** @defgroup CRC_Exported_Functions_Group1 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);
  /**
    * @}
    */
  
  /* Peripheral Control functions ***********************************************/
  /** @defgroup CRC_Exported_Functions_Group2 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);
  /**
    * @}
    */
  
  /* Peripheral State and Error functions ***************************************/
  /** @defgroup CRC_Exported_Functions_Group3 Peripheral State functions
    * @{
    */
  HAL_CRC_StateTypeDef HAL_CRC_GetState(CRC_HandleTypeDef *hcrc);
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* STM32G0xx_HAL_CRC_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  