?? fat.h
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/*************************************************************/
/* FAT操作函數庫 */
/* 環境WinAVR 20060421 */
/* 作者：Bozai（章其波） */
/* E-mail：sudazqb@163.com */
/* 2007年2月13日 */
/*************************************************************/
/* 20071109: add & modify function for any directory music file playing */
/* 20071103: add function for lyric display */
/*History: 2007年2月13日 */
/* 添加了適合于RAM豐富的AVR單片機操作 的FAT表函數 */
/* 改進了查找FAT表的函數,使在硬盤操作時不需頻繁去讀FAT表. */
/* 注: 只適合RAM足夠多的單片機 */
/*************************************************************/
#ifndef __FAT_H__
#define __FAT_H__
#define CHAR char
#define BYTE unsigned char
#define WORD unsigned int
#define DWORD unsigned long
#define MAX_LONG_NAME_SIZE 80 /* 26*n+2 n=3 */
#define FAT_DEBUG 0 /* FAT debug flag */
#define FIX_DIRECTORY 0 /* 1 means use fix directory, 0 for any directory */
#if FIX_DIRECTORY==0
#define RECORD_ADDR_START 1500 /* eeprom start address */
#define RECORD_ADDR_END 2048 /* eeprom end address */
#include<avr/eeprom.h>
#include<avr/pgmspace.h>
#include<stdio.h>
#endif
//#include "UART.H"
#include <stdlib.h>
extern int USART_putchar(char CH);
extern BYTE (* FAT_ReadSector)(DWORD,BYTE *);
extern BYTE (* FAT_WriteSector)(DWORD,BYTE *);
extern DWORD (* FAT_ReadCapacity)(void);
//聲明外部器件讀寫函數
extern BYTE CH375_ReadOneSector(DWORD LBA,BYTE *buffer);
extern BYTE CH375_WriteOneSector(DWORD LBA,BYTE *buffer);
extern BYTE MMC_SD_ReadSingleBlock(DWORD sector, BYTE* buffer);
extern BYTE MMC_SD_WriteSingleBlock(DWORD sector, BYTE* buffer);
extern BYTE IDE_ReadOneSector(DWORD LBA,BYTE *buffer);
extern BYTE IDE_WriteOneSector(DWORD LBA,BYTE *buffer);
extern DWORD MMC_SD_ReadCapacity(void);
#define MSDOSFSROOT 0 // cluster 0 means the root dir
#define CLUST_FREE 0 // cluster 0 also means a free cluster
#define MSDOSFSFREE CLUST_FREE
#define CLUST_FIRST 2 // first legal cluster number
#define CLUST_RSRVD 0xfff6 // reserved cluster range
#define CLUST_BAD 0xfff7 // a cluster with a defect
#define CLUST_EOFS 0xfff8 // start of eof cluster range
#define CLUST_EOFE 0xffff // end of eof cluster range
struct partrecord // length 16 bytes
{
BYTE prIsActive; // 0x80 indicates active partition
BYTE prStartHead; // starting head for partition
WORD prStartCylSect; // starting cylinder and sector
BYTE prPartType; // partition type (see above)
BYTE prEndHead; // ending head for this partition
WORD prEndCylSect; // ending cylinder and sector
DWORD prStartLBA; // first LBA sector for this partition
DWORD prSize; // size of this partition (bytes or sectors ?)
};
struct partsector
{
CHAR psPartCode[512-64-2]; // pad so struct is 512b
BYTE psPart[64]; // four partition records (64 bytes)
BYTE psBootSectSig0; // two signature bytes (2 bytes)
BYTE psBootSectSig1;
#define BOOTSIG0 0x55
#define BOOTSIG1 0xaa
};
struct extboot {
CHAR exDriveNumber; // drive number (0x80)//0x00 for floopy disk 0x80 for hard disk
CHAR exReserved1; // reserved should always set 0
CHAR exBootSignature; // ext. boot signature (0x29)
#define EXBOOTSIG 0x29
CHAR exVolumeID[4]; // volume ID number
CHAR exVolumeLabel[11]; // volume label "NO NAME"
CHAR exFileSysType[8]; // fs type (FAT12 or FAT)
};
struct bootsector50 {
BYTE bsJump[3]; // jump inst E9xxxx or EBxx90
CHAR bsOemName[8]; // OEM name and version
CHAR bsBPB[25]; // BIOS parameter block
CHAR bsExt[26]; // Bootsector Extension
CHAR bsBootCode[448]; // pad so structure is 512b
BYTE bsBootSectSig0; // boot sector signature byte 0x55
BYTE bsBootSectSig1; // boot sector signature byte 0xAA
#define BOOTSIG0 0x55
#define BOOTSIG1 0xaa
};
struct bpb50 {
WORD bpbBytesPerSec; // bytes per sector //512 1024 2048 or 4096
BYTE bpbSecPerClust; // sectors per cluster // power of 2
WORD bpbResSectors; // number of reserved sectors //1 is recommend
BYTE bpbFATs; // number of FATs // 2 is recommend
WORD bpbRootDirEnts; // number of root directory entries
WORD bpbSectors; // total number of sectors
BYTE bpbMedia; // media descriptor //0xf8 match the fat[0]
WORD bpbFATsecs; // number of sectors per FAT
WORD bpbSecPerTrack; // sectors per track
WORD bpbHeads; // number of heads
DWORD bpbHiddenSecs; // # of hidden sectors
DWORD bpbHugeSectors; // # of sectors if bpbSectors == 0
};
struct bootsector710 {
BYTE bsJump[3]; // jump inst E9xxxx or EBxx90
CHAR bsOemName[8]; // OEM name and version
CHAR bsBPB[53]; // BIOS parameter block
CHAR bsExt[26]; // Bootsector Extension
CHAR bsBootCode[418]; // pad so structure is 512b
BYTE bsBootSectSig2; // boot sector signature byte 0x00
BYTE bsBootSectSig3; // boot sector signature byte 0x00
BYTE bsBootSectSig0; // boot sector signature byte 0x55
BYTE bsBootSectSig1; // boot sector signature byte 0xAA
#define BOOTSIG0 0x55
#define BOOTSIG1 0xaa
#define BOOTSIG2 0x00
#define BOOTSIG3 0x00
};
struct bpb710 {
WORD bpbBytesPerSec; // bytes per sector
BYTE bpbSecPerClust; // sectors per cluster
WORD bpbResSectors; // number of reserved sectors
BYTE bpbFATs; // number of FATs
WORD bpbRootDirEnts; // number of root directory entries
WORD bpbSectors; // total number of sectors
BYTE bpbMedia; // media descriptor
WORD bpbFATsecs; // number of sectors per FAT
WORD bpbSecPerTrack; // sectors per track
WORD bpbHeads; // number of heads
DWORD bpbHiddenSecs; // # of hidden sectors
// 3.3 compat ends here
DWORD bpbHugeSectors; // # of sectors if bpbSectors == 0
// 5.0 compat ends here
DWORD bpbBigFATsecs;// like bpbFATsecs for FAT32
WORD bpbExtFlags; // extended flags:
#define FATNUM 0xf // mask for numbering active FAT
#define FATMIRROR 0x80 // FAT is mirrored (like it always was)
WORD bpbFSVers; // filesystem version
#define FSVERS 0 // currently only 0 is understood
DWORD bpbRootClust; // start cluster for root directory
WORD bpbFSInfo; // filesystem info structure sector
WORD bpbBackup; // backup boot sector
// There is a 12 byte filler here, but we ignore it
};
// Structure of a dos directory entry.
struct direntry {
BYTE deName[8]; // filename, blank filled
#define SLOT_EMPTY 0x00 // slot has never been used
#define SLOT_E5 0x05 // the real value is 0xE5
#define SLOT_DELETED 0xE5 // file in this slot deleted
#define SLOT_DIR 0x2E // a directorymmm
BYTE deExtension[3]; // extension, blank filled
BYTE deAttributes; // file attributes
#define ATTR_NORMAL 0x00 // normal file
#define ATTR_READONLY 0x01 // file is readonly
#define ATTR_HIDDEN 0x02 // file is hidden
#define ATTR_SYSTEM 0x04 // file is a system file
#define ATTR_VOLUME 0x08 // entry is a volume label
#define ATTR_LONG_FILENAME 0x0F // this is a long filename entry
#define ATTR_DIRECTORY 0x10 // entry is a directory name
#define ATTR_ARCHIVE 0x20 // file is new or modified
BYTE deLowerCase; // NT VFAT lower case flags (set to zero)
#define LCASE_BASE 0x08 // filename base in lower case
#define LCASE_EXT 0x10 // filename extension in lower case
BYTE deCHundredth; // hundredth of seconds in CTime
BYTE deCTime[2]; // create time
BYTE deCDate[2]; // create date
BYTE deADate[2]; // access date
WORD deHighClust; // high bytes of cluster number
BYTE deMTime[2]; // last update time
BYTE deMDate[2]; // last update date
WORD deStartCluster; // starting cluster of file
DWORD deFileSize; // size of file in bytes
};
// number of directory entries in one sector
#define DIRENTRIES_PER_SECTOR 0x10 //when the bpbBytesPerSec=512
// Structure of a Win95 long name directory entry
struct winentry {
BYTE weCnt; //
#define WIN_LAST 0x40
#define WIN_CNT 0x3f
BYTE wePart1[10];
BYTE weAttributes;
#define ATTR_WIN95 0x0f
BYTE weReserved1;
BYTE weChksum;
BYTE wePart2[12];
WORD weReserved2;
BYTE wePart3[4];
};
#define WIN_ENTRY_CHARS 13 // Number of chars per winentry
// Maximum filename length in Win95
// Note: Must be < sizeof(dirent.d_name)
#define WIN_MAXLEN 255
// This is the format of the contents of the deTime field in the direntry
// structure.
// We don't use bitfields because we don't know how compilers for
// arbitrary machines will lay them out.
#define DT_2SECONDS_MASK 0x1F // seconds divided by 2
#define DT_2SECONDS_SHIFT 0
#define DT_MINUTES_MASK 0x7E0 // minutes
#define DT_MINUTES_SHIFT 5
#define DT_HOURS_MASK 0xF800 // hours
#define DT_HOURS_SHIFT 11
// This is the format of the contents of the deDate field in the direntry
// structure.
#define DD_DAY_MASK 0x1F // day of month
#define DD_DAY_SHIFT 0
#define DD_MONTH_MASK 0x1E0 // month
#define DD_MONTH_SHIFT 5
#define DD_YEAR_MASK 0xFE00 // year - 1980
#define DD_YEAR_SHIFT 9
// Stuctures
struct FileInfoStruct
{
unsigned long StartCluster; //< file starting cluster for last file accessed
unsigned long Size; //< file size for last file accessed
unsigned char Attr; //< file attr for last file accessed
//unsigned short CreateTime; //< file creation time for last file accessed
//unsigned short CreateDate; //< file creation date for last file accessed
unsigned long Sector; //<file record place
unsigned int Offset; //<file record offset
};
//MP3后添加的函數
#if FIX_DIRECTORY
extern BYTE Search(BYTE *dir,struct direntry *MusicInfo,WORD *Count,BYTE *type);//查找音樂文件
extern BYTE SearchLrc(BYTE *dir,BYTE * longnamebuffer,struct direntry *LrcInfo);//serch lrc file
#else
extern BYTE SearchInit();
extern BYTE Search(WORD *music_record_addr,struct direntry *MusicInfo,WORD *Count,BYTE *type);//查找音樂文件
extern BYTE SearchLrc(BYTE *dir,BYTE * longnamebuffer,struct direntry *LrcInfo,WORD music_record_addr);//serch lrc file
#endif
extern unsigned char FAT_LoadPartCluster(unsigned long cluster,unsigned part,BYTE * buffer);//加載文件
extern unsigned long FAT_NextCluster_NEW(unsigned long cluster);//fit system which has large ram
//FAT原有的函數
extern unsigned char FAT_Init();//初始化
//unsigned char FAT_LoadCluster(unsigned long cluster,BYTE * buffer);//讀一個扇區
extern unsigned long FAT_NextCluster(unsigned long cluster);//查找下一簇號
extern unsigned long FAT_FindFreeCluster();//查找空簇
extern unsigned char FAT_DisDir(BYTE *dir);//顯示目錄內容
extern unsigned int FAT_FindItem(unsigned long cluster, BYTE *name, struct FileInfoStruct *FileInfo);//查找文件
extern unsigned long FAT_Open(BYTE * dir);//打開文件
extern unsigned long FAT_OpenDir(BYTE * dir);//打開目錄
extern unsigned char FAT_Read(unsigned long pointer, unsigned long size);//讀文件，size=0代表整個文件
extern unsigned char FAT_Rename(BYTE *dir,BYTE *newname);//重命名
extern unsigned char FAT_ModifyFAT(unsigned long cluster,unsigned long val);//修改FAT項
extern unsigned char FAT_Delete(BYTE *dir);//刪除文件
extern unsigned char FAT_DelItem(struct FileInfoStruct *FileInfo);//刪除記錄項
extern unsigned int FAT_FindFreeItem(unsigned long cluster, struct FileInfoStruct *FileInfo);//查找空余項
extern unsigned char FAT_MkDir(BYTE * dir);//建目錄
extern unsigned char FAT_Write(unsigned long cluster,unsigned char *data,unsigned long size);//寫文件
extern unsigned long FAT_Create(BYTE * dir,unsigned long size);//建文件，必須指定文件大小
extern unsigned char FAT_RmDir(BYTE * dir);//刪除目錄
extern unsigned int FAT_Close(unsigned long * p);//關閉文件
#endif
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