/****************************************Copyright (c)**************************************************
**                               Guangzhou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:			sdtools.c
** Last modified Date:	2005-1-6
** Last Version:		V1.0
** Descriptions:		sd 卡驅(qū)動(dòng)軟件包: SD卡相關(guān)工具函數(shù) ---- CRC校驗(yàn)頭文件
**						Soft Packet of SD Card Driver: tool funcitons about sd card ---- crc check header file
**
**------------------------------------------------------------------------------------------------------
** Created by:			Ming Yuan Zheng
** Created date:		2005-1-6
** Version:				V1.0
** Descriptions:		The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:			
** Modified date:		
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** Descriptions:		
**
**------------------------------------------------------------------------------------------------------
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********************************************************************************************************/

extern INT16U SD_GetCRC16(INT8U *pSource,INT16U len);	//得到len個(gè)字節(jié)的CRC16

extern INT8U SD_GetCmdByte6(INT8U cmd,INT8U *param);	//得到SD命令的第6個(gè)字節(jié): CRC7 + 停止位1

extern INT8U SD_GetCRC7(INT8U *pSource,INT16U len);		//得到len個(gè)字節(jié)的CRC7