fattypes.h

本程序为ST公司开发的源代码

/**************************************************
 *
 * fattypes.h
 *
 * CVS ID:   $Id:
 * Author:   Michal Chlapik [ MCH ] - STM
 * Date:     $Date: 2006/09/18 09:55:22 $
 * Revision: $Revision: 1.5 $
 *
 * Description:
 *
 *   <...>
 *
 ***************************************************
 *
 * COPYRIGHT (C) ST Microelectronics  2005
 *            All Rights Reserved
 *
 ****************************************************
 *
 * STM CVS Log:
 *
 * $Log: FATtypes.h,v $
 * Revision 1.5  2006/09/18 09:55:22  belardi
 * Corrected CVS keyword usage
 *
 * Revision 1.4  2006/09/18 09:24:02  belardi
 * Added Log CVS keyword into file header
 *
 *
 ***************************************************/

#ifndef FATTYPES_H
#define FATTYPES_H

#include "OS20i.h"

typedef struct
{
  uint32 Cluster;
  uint32 Byte;
} ENTRY_ADDRESS;


typedef struct BPB_boot_common_s
{
    uint8     jmpBoot0;         // 00h : Jump code
    uint8     jmpBoot1;         // 01h : Jump code
    uint8     jmpBoot2;         // 02h : Jump code
    char      OEMName[9];         // 03h : OEM name [8+1]
    uint16    BytesPerSec;      // 0Bh : Bytes per sector
    uint8     SecPerClust;      // 0Dh : Sectors per cluster
    uint16    RsvdSecCnt;       // 0Eh : Number of reserved sectors
    uint8     NumFATs;          // 10h : Number of copies of fat
    uint16    RootEntCnt;       // 11h : Maximum number of root dir entries
    uint16    TotSec16;         // 13h : Number of sectors in partition < 32MB
    uint8     Media;            // 15h : Media descriptor
    uint16    FATSz16;          // 16h : Sectors per FAT
    uint16    SecPerTrk;        // 18h : Sectors per track
    uint16    NumHeads;         // 1Ah : Number of heads
    uint32    HiddSec;          // 1Ch : Number of hidden sectors
    uint32    TotSec32;         // 20h : Number of sectors in partition
    //information not in file, but our own
    uint8     FATType;          // FAT type
    uint32    FATSz32Estim;     // 4 bytes at position 36, mess in FAT type determination
} BPB_boot_common_t;



typedef struct BPB_boot_rest_FAT_12_16_s
{
    uint8     DrvNum;               // 24h : Logical drive number of partition
    uint8     BootSig;              // 26h : Extended signature
    uint32    VolID;                // 27h : Serial number of partition
    //char      VolLab[12];           // 2Bh : Volume name of partition [11+1]
    char      FilSysType[9];        // 36h : FAT name [8+1]
} BPB_boot_rest_FAT_12_16_t;


typedef struct BPB_boot_rest_FAT_32_s
{
    uint32    FATSz32;          // 24h : Sectors per FAT
    uint16    ExtFlags;         // 28h : number of active FAT
    uint16    FSVer;            // 2Ah : Version number of the FAT32 volume
    uint32    RootClus;         // 2Ch : First cluster of the root directory (2)
    uint16    FSInfo;           // 30h : Sector number of FSINFO structure in the reserved area
    uint16    BkBootSec;        // 32h : Sector number in the reserved area of a copy of the boot record
    uint8     DrvNum;           // 40h : Logical drive number of partition
    uint8     BootSig;          // 42h : Extended signature
    uint32    VolID;            // 43h : Serial number of partition
    //char      VolLab[12];       // 47h : Volume name of partition [11+1]
    char      FilSysType[9];    // 52h : FAT name [8+1]
} BPB_boot_rest_FAT_32_t;


typedef union
{
  BPB_boot_rest_FAT_12_16_t BPB_boot_rest_FAT_12_16;
  BPB_boot_rest_FAT_32_t    BPB_boot_rest_FAT_32;
} BPB_boot_rest_union;


typedef struct
{
    BPB_boot_common_t   BPB_boot_common;
    BPB_boot_rest_union BPB_boot_rest;

    uint32 RootRecordLba;
    uint32 RootDirSec;
    uint32 FirstDataSector;

    //for Get_SectorRel
    uint32 LastRequiredSector_rel;
    boolean FirstPassGetSector_FAT;
    //for Get_SectorAbs
    uint32 LastRequiredSector_abs;
    boolean FirstPassGetSectorAbs_FAT;

    //ext filter
  //  uint8 ExtTbl[10][3];  //M.Ch.
    uint32 ExtTblLen;     //M.Ch.

} PRIVATE_DATA_FAT;


#endif