fat.h

本程序为ST公司开发的源代码

/**************************************************
 *
 * fat.h
 *
 * CVS ID:   $Id: 
 * Author:   Michal Chlapik [ MCH ] - STM
 * Date:     $Date: 2006/09/15 19:46:47 $
 * Revision: $Revision: 1.8 $
 * 
 * Description:
 * 
 *   <...>
 *
 ***************************************************
 * 
 * COPYRIGHT (C) ST Microelectronics  2005
 *            All Rights Reserved
 *
 ***************************************************
 *
 * STM CVS Log:
 *
 * $Log: FAT.h,v $
 * Revision 1.8  2006/09/15 19:46:47  belardi
 * Merged the m8_cav2_cm80506_cs3563.
 * - moved code outside of #ifdef
 *
 *
 ***************************************************/
 
#ifndef __FAT_H
#define __FAT_H

#include "configuration.h"

#include "FATsupport.h"

#if (HAVE_FAT)

//#include "filesys.h" // [OK] SCAN_CTRUCT

#include <stdlib.h>
#include <string.h>

#define ATTR_READ_ONLY         0x01      
#define ATTR_HIDDEN            0x02
#define ATTR_SYSTEM            0x04      
#define ATTR_VOLUME_ID         0x08
#define ATTR_DIRECTORY         0x10      
#define ATTR_ARCHIVE           0x20      

#define ATTR_LONG_NAME_MASK    (ATTR_READ_ONLY| \
                               ATTR_HIDDEN|    \
                               ATTR_SYSTEM|    \
                               ATTR_VOLUME_ID| \
                               ATTR_DIRECTORY| \
                               ATTR_ARCHIVE)

#define ATTR_LONG_NAME         (ATTR_READ_ONLY| \
                               ATTR_HIDDEN|    \
                               ATTR_SYSTEM|    \
                               ATTR_VOLUME_ID)


#define FAT12    1
#define FAT16    2
#define FAT32    0


//M.Ch.
//#define DSP      1



typedef struct
{
    uint32    Sector;
    uint32    Offset;    
} SectorAndOffset_t;


typedef enum 
{
  FAT_DIR_FOUND,
  FAT_FILE_FOUND

} ENTRY_TYPE;



typedef struct
{
    uint8 *EntryBuf;
    uint8 *SectorBuffer;
    SCAN_STRUCT *Scan_struct_ptr;
    DIR_ITEM *Dir_item_ptr;
    PRIVATE_DATA_FAT *FAT_private_struct_ptr;
    boolean LongNameFound;
    uint32 N;
    uint16 WholeLongEntryLength;
    uint8 CheckSum;
    boolean StatusLongName;
    uint16 LongName[255];
    uint8 (*ExtTbl)[3];
    uint32 ExtTblLen;
    ENTRY_TYPE TypeOfEntry;

} ENTRY_STUFF_STRUCT;




//macroes definition
#define GET_BYTE(_data_, _var_, _off_) (_var_ = *( ((uint8 *)_data_) + (_off_) ) )

#define GET_WORD(_data_, _var_, _off_)                      \
    (_var_ = *( ((uint8 *)_data_) + (_off_) )     |         \
             *( ((uint8 *)_data_) + (_off_) + 1 ) << 8)

#define GET_DWORD(_data_, _var_, _off_)                         \
    (_var_ = *( ((uint8 *)_data_) + (_off_))             |  \
             *( ((uint8 *)_data_) + (_off_) + 1 ) << 8   |  \
             *( ((uint8 *)_data_) + (_off_) + 2 ) << 16  |  \
             *( ((uint8 *)_data_) + (_off_) + 3 ) << 24)

#define GET_BYTES(_data_, _var_, _size_, _off_) \
    memcpy((void *)(_var_), (void*)(((uint8 *)_data_)+(_off_)),_size_)


//function declaration
GRESULT FAT_GetPartitions(DUID did, uint8 *Secbuf, FS_DESCRIPTOR *fsd);
void FillExtTbl(FS_DESCRIPTOR *fsd, char ExtTblOEM[][4], uint32 ExtTblLen);
GRESULT FAT_Detect(DUID cdid, int partition, FS_DESCRIPTOR *fsd);
GRESULT FAT_GetDirItem(SCAN_STRUCT *scans, DIR_ITEM *item, uint8 *buf);

#endif /* (HAVE_FAT) */

#endif /* __FAT_H */