Subversion Repositories openrisc_2011-10-31

/**
  ******************************************************************************
  * @file  stm32f10x_crc.c
  * @author  MCD Application Team
  * @version  V3.0.0
  * @date  04/06/2009
  * @brief  This file provides all the CRC firmware functions.
  ******************************************************************************
  * @copy
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
  */ 
 
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_crc.h"
 
/** @addtogroup StdPeriph_Driver
  * @{
  */
 
/** @defgroup CRC 
  * @brief CRC driver modules
  * @{
  */
 
/** @defgroup CRC_Private_TypesDefinitions
  * @{
  */
 
/**
  * @}
  */
 
/** @defgroup CRC_Private_Defines
  * @{
  */
 
/* CR register bit mask */
 
#define CR_RESET_Set    ((uint32_t)0x00000001)
 
/**
  * @}
  */
 
/** @defgroup CRC_Private_Macros
  * @{
  */
 
/**
  * @}
  */
 
/** @defgroup CRC_Private_Variables
  * @{
  */
 
/**
  * @}
  */
 
/** @defgroup CRC_Private_FunctionPrototypes
  * @{
  */
 
/**
  * @}
  */
 
/** @defgroup CRC_Private_Functions
  * @{
  */
 
/**
  * @brief  Resets the CRC Data register (DR).
  * @param  None
  * @retval : None
  */
void CRC_ResetDR(void)
{
  /* Reset CRC generator */
  CRC->CR = CR_RESET_Set;
}
 
/**
  * @brief  Computes the 32-bit CRC of a given data word(32-bit).
  * @param Data: data word(32-bit) to compute its CRC
  * @retval : 32-bit CRC
  */
uint32_t CRC_CalcCRC(uint32_t Data)
{
  CRC->DR = Data;
 
  return (CRC->DR);
}
 
/**
  * @brief  Computes the 32-bit CRC of a given buffer of data word(32-bit).
  * @param pBuffer: pointer to the buffer containing the data to be 
  *   computed
  * @param BufferLength: length of the buffer to be computed					
  * @retval : 32-bit CRC
  */
uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
{
  uint32_t index = 0;
 
  for(index = 0; index < BufferLength; index++)
  {
    CRC->DR = pBuffer[index];
  }
  return (CRC->DR);
}
 
/**
  * @brief  Returns the current CRC value.
  * @param  None
  * @retval : 32-bit CRC
  */
uint32_t CRC_GetCRC(void)
{
  return (CRC->DR);
}
 
/**
  * @brief  Stores a 8-bit data in the Independent Data(ID) register.
  * @param IDValue: 8-bit value to be stored in the ID register 					
  * @retval : None
  */
void CRC_SetIDRegister(uint8_t IDValue)
{
  CRC->IDR = IDValue;
}
 
/**
  * @brief  Returns the 8-bit data stored in the Independent Data(ID) register
  * @param  None
  * @retval : 8-bit value of the ID register 
  */
uint8_t CRC_GetIDRegister(void)
{
  return (CRC->IDR);
}
 
/**
  * @}
  */
 
/**
  * @}
  */
 
/**
  * @}
  */
 
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/