text: /**
    ******************************************************************************
    * @file    stm32f30x_crc.h
    * @author  MCD Application Team
    * @version V1.0.0
    * @date    04-September-2012
    * @brief   This file contains all the functions prototypes for the CRC firmware 
    *          library.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
    *
    * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
    * You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at:
    *
    *        http://www.st.com/software_license_agreement_liberty_v2
    *
    * Unless required by applicable law or agreed to in writing, software 
    * distributed under the License is distributed on an "AS IS" BASIS, 
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    * See the License for the specific language governing permissions and
    * limitations under the License.
    *
    ******************************************************************************
    */ 
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef __STM32F30x_CRC_H
  #define __STM32F30x_CRC_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /*!< Includes ----------------------------------------------------------------*/
  #include "stm32f30x.h"
  
  /** @addtogroup STM32F30x_StdPeriph_Driver
    * @{
    */
  
  /** @addtogroup CRC
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /* Exported constants --------------------------------------------------------*/
  
  /** @defgroup CRC_ReverseInputData
    * @{
    */
  #define CRC_ReverseInputData_No             ((uint32_t)0x00000000) /*!< No reverse operation of Input Data */
  #define CRC_ReverseInputData_8bits          CRC_CR_REV_IN_0        /*!< Reverse operation of Input Data on 8 bits */
  #define CRC_ReverseInputData_16bits         CRC_CR_REV_IN_1        /*!< Reverse operation of Input Data on 16 bits */
  #define CRC_ReverseInputData_32bits         CRC_CR_REV_IN          /*!< Reverse operation of Input Data on 32 bits */
  
  #define IS_CRC_REVERSE_INPUT_DATA(DATA) (((DATA) == CRC_ReverseInputData_No)     || \
                                           ((DATA) == CRC_ReverseInputData_8bits)  || \
                                           ((DATA) == CRC_ReverseInputData_16bits) || \
                                           ((DATA) == CRC_ReverseInputData_32bits))
  
  /**
    * @}
    */
  
  /** @defgroup CRC_PolynomialSize
    * @{
    */
  #define CRC_PolSize_7                       CRC_CR_POLSIZE        /*!< 7-bit polynomial for CRC calculation */
  #define CRC_PolSize_8                       CRC_CR_POLSIZE_1      /*!< 8-bit polynomial for CRC calculation */
  #define CRC_PolSize_16                      CRC_CR_POLSIZE_0      /*!< 16-bit polynomial for CRC calculation */
  #define CRC_PolSize_32                      ((uint32_t)0x00000000)/*!< 32-bit polynomial for CRC calculation */
  
  #define IS_CRC_POL_SIZE(SIZE) (((SIZE) == CRC_PolSize_7)  || \
                                 ((SIZE) == CRC_PolSize_8)  || \
                                 ((SIZE) == CRC_PolSize_16) || \
                                 ((SIZE) == CRC_PolSize_32))
  
  /**
    * @}
    */
  
  /* Exported macro ------------------------------------------------------------*/
  /* Exported functions ------------------------------------------------------- */
  /* Configuration of the CRC computation unit **********************************/
  void CRC_DeInit(void);
  void CRC_ResetDR(void);
  void CRC_PolynomialSizeSelect(uint32_t CRC_PolSize); /* Select or Config, which one is the best */
  void CRC_ReverseInputDataSelect(uint32_t CRC_ReverseInputData);
  void CRC_ReverseOutputDataCmd(FunctionalState NewState);
  void CRC_SetInitRegister(uint32_t CRC_InitValue); /* change the function proto to SetInitRemainder() ??? */
  void CRC_SetPolynomial(uint32_t CRC_Pol);
  
  /* CRC computation ************************************************************/
  uint32_t CRC_CalcCRC(uint32_t CRC_Data);
  uint32_t CRC_CalcCRC16bits(uint16_t CRC_Data);
  uint32_t CRC_CalcCRC8bits(uint8_t CRC_Data);
  uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength);
  uint32_t CRC_GetCRC(void);
  
  /* Independent register (IDR) access (write/read) *****************************/
  void CRC_SetIDRegister(uint8_t CRC_IDValue);
  uint8_t CRC_GetIDRegister(void);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32F30x_CRC_H */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  