storage.c

SdCard_V2.1TinyFatFs.rar是单片机实现SD卡功能的FAT文件系统

/*
**********************************************************************************************
* Project:	FS7805 SD CARD READER
* File:		main.c
* Contents: 
*           The main function is SD and MMC card reader.
*
* $Date: 12/15/06    Derek    V1.0  
*  
* Coments: This is the SD/MMC card reader firmware.
*		   When read sector,the 512 pingpong FIFO mechanism
*		   is used to improve performance.But when write sector,
*		   only single FIFO is used.
*
* $Date: 12/27/06    Derek    V1.1
*
* 		   The 512 pingpong FIFO mechanism is also used when 
*		   writting sectors.
*
* $Date: 01/09/07    Derek    V1.11
*
* 		   Fix read sector error bug . 
*		   Don't set FIFO_FULL bit in SetBulkInFull() function.
*		   Setting it in BulkSetDmaIn() function.
*
* $Date: 01/18/07    Derek    V1.11
*
*		   Ignor the OUT_OF_RANGE error in SdSendCmd() when
*		   multi read the last block.
*
* $Date: 03/29/07    Derek    V1.2
*
*		   Add TDES module for data encrypt and decrypt.
*
* Copyright (c) 2007 Fameg, Inc. All rights reserved
*
* 
***********************************************************************************************
*/
#include "include\Include.h"
#include "diskio.h"		/* Include file for user provided functions */

INT16U CmdTimer;		   //modify by derek. from BYTE TO INT16U

BYTE LastDevice = 0;		   //用来指示设备的数目

xdata TDeviceInfo DeviceInfo;
xdata STATUS SdMediaStatus = STATUS_NO_MEDIA;

//----------------------------------------------------------------------------
// Description:
//   Initiate the storage interfaces
//----------------------------------------------------------------------------
void StorageInit()
{
//    LastDevice = 0;

  	SdInit();
}




DSTATUS disk_status ()
{
  return 0;
}
DRESULT disk_read ( BYTE*buff, DWORD sector, BYTE count)
{
  if (!count) return RES_PARERR; 
  do{
  	 SdReadOneSector(buff,sector);
    }while(count--);
   
  
}


DRESULT disk_write ( BYTE*buff, DWORD sector, BYTE count)
{
  if (!count) return RES_PARERR; 
  do{
  	 SdWriteOneSector(buff,sector);
    }while(count--);
   
  
}