/**
  ******************************************************************************
  * @file STLcrc32.h 
  * @author  MCD Application Team
  * @version  V1.0.0
  * @date  May-2012
  * @brief  This file contains all the functions prototypes for the
  *                      ADC firmware library.
  ******************************************************************************
  * @copyright
  *
  * <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 __STL_CRC32_H
#define __STL_CRC32_H

/* Includes ------------------------------------------------------------------*/
#include "gd32f30x_libopt.h"
#include "STLmisc.h"


/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/

/* DR is the read/write data register which holds the 32-bit CRC. Each write in
this register re-computes a CRC with the new data and the previous CRC. The
result is written back into DR. (kind of CRC) */

/* IDR is a 8-bit storage register which allows to keep a test ID or the 8 LSBs
of a previous CRC for instance */

/* CR is the Control Register. It contains the CRC reset bit (other bits are
reserved). The CRC reset value is 0xFFFFFFFF */

#define CRC_RESET          (uint32_t)(0x00000001)

/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
void CRC_Init(void);
uint32_t CRC_CalcBlockCrc(uc32 *p, uint32_t len);


#endif /*__CRC_H */

/******************* (C) COPYRIGHT STMicroelectronics *****END OF FILE****/