fatutil.h File Reference

#include "usb.h"
#include "DataRam.h"

Go to the source code of this file.

Data Structures
struct	BSStruct
struct	FAT
struct	FATTime
struct	FATDate
struct	DirEntry
struct	DISKIMAGE

Macros
#define	FAT12   1
#define	FAT16   2
#define	FAT32   3
#define	UDIV_ROUNDUP(a, b)   ((a + b - 1) / b)
#define	FATTYPE   FAT12
#define	DISKSIZE   (0x100000)
#define	BYTESPERSECTOR   (512)
#define	RESERVEDSECTORCNT   (1)
#define	ROOTENTRIES   (UDIV_ROUNDUP(BYTESPERSECTOR, 32))
#define	DIRECTORYSECTORCNT   (UDIV_ROUNDUP(ROOTENTRIES, 16))
#define	NUMFATS   (2)
#define	SECTORSPERCLUSTER   (1)
#define	DATASECTORS   (1024)
#define	TOTALSECTORS   (UDIV_ROUNDUP(DISKSIZE, BYTESPERSECTOR))
#define	FATENTRIESPERSECTOR   (UDIV_ROUNDUP(BYTESPERSECTOR * 8, 12 /*FAT12*/))
#define	SECTORSPERFAT
#define	NONDATASECTORS   (RESERVEDSECTORCNT + NUMFATS * SECTORSPERFAT + DIRECTORYSECTORCNT)
#define	STARTDATAREGION   (NONDATASECTORS * BYTESPERSECTOR)
#define	BYTESPERCLUSTER   (BYTESPERSECTOR * SECTORSPERCLUSTER)
#define	FAT_MEDIA   (0xF0)
#define	TIME_HOUR   16
#define	TIME_MIN   00
#define	TIME_SEC   00
#define	DATE_YEAR   2011 - 1980
#define	DATE_MONTH   8
#define	DATE_DAY   11

Functions
int16_t	GetFAT12Entry (DISKIMAGE *DiskImagePtr, int FATindex)
void	SetFAT12Entry (DISKIMAGE *DiskImagePtr, int FATindex, unsigned short FAT12ClusEntryVal)
uint32_t	CalculateCountOfClusters (DISKIMAGE *DiskImagePtr)
void	CreateDiskImage (DISKIMAGE *DiskImagePtr)
void	SetDiskMetricsFromDiskImage (DISKIMAGE *DiskImagePtr)
void	InitializeDiskDiskImage (DISKIMAGE *DiskImagePtr)
void	InitializeFAT12 (DISKIMAGE *DiskImagePtr)

Variables
int32_t	RootEntries
int32_t	BytesPerSector
int32_t	NumFats
int32_t	SectorsPerFat
int32_t	NonDataSectors
int32_t	TotalSectors
int32_t	StartDataRegion

Macro Definition Documentation

#define BYTESPERCLUSTER   (BYTESPERSECTOR * SECTORSPERCLUSTER)

Definition at line 47 of file fatutil.h.

#define BYTESPERSECTOR   (512)

Definition at line 31 of file fatutil.h.

#define DATASECTORS   (1024)

Definition at line 38 of file fatutil.h.

#define DATE_DAY   11

Definition at line 56 of file fatutil.h.

#define DATE_MONTH   8

Definition at line 55 of file fatutil.h.

#define DATE_YEAR   2011 - 1980

Definition at line 54 of file fatutil.h.

#define DIRECTORYSECTORCNT   (UDIV_ROUNDUP(ROOTENTRIES, 16))

Definition at line 35 of file fatutil.h.

#define DISKSIZE   (0x100000)

Definition at line 30 of file fatutil.h.

#define FAT12   1

Definition at line 22 of file fatutil.h.

#define FAT16   2

Definition at line 23 of file fatutil.h.

#define FAT32   3

Definition at line 24 of file fatutil.h.

#define FAT_MEDIA   (0xF0)

Definition at line 48 of file fatutil.h.

#define FATENTRIESPERSECTOR   (UDIV_ROUNDUP(BYTESPERSECTOR * 8, 12 /*FAT12*/))

Definition at line 41 of file fatutil.h.

#define FATTYPE   FAT12

Definition at line 27 of file fatutil.h.

#define NONDATASECTORS   (RESERVEDSECTORCNT + NUMFATS * SECTORSPERFAT + DIRECTORYSECTORCNT)

Definition at line 45 of file fatutil.h.

#define NUMFATS   (2)

Definition at line 36 of file fatutil.h.

#define RESERVEDSECTORCNT   (1)

Definition at line 32 of file fatutil.h.

#define ROOTENTRIES   (UDIV_ROUNDUP(BYTESPERSECTOR, 32))

Definition at line 33 of file fatutil.h.

#define SECTORSPERCLUSTER   (1)

Definition at line 37 of file fatutil.h.

#define SECTORSPERFAT

Value:

(UDIV_ROUNDUP(UDIV_ROUNDUP((TOTALSECTORS - RESERVEDSECTORCNT), SECTORSPERCLUSTER), \
         FATENTRIESPERSECTOR))

Definition at line 42 of file fatutil.h.

#define STARTDATAREGION   (NONDATASECTORS * BYTESPERSECTOR)

Definition at line 46 of file fatutil.h.

#define TIME_HOUR   16

Definition at line 51 of file fatutil.h.

#define TIME_MIN   00

Definition at line 52 of file fatutil.h.

#define TIME_SEC   00

Definition at line 53 of file fatutil.h.

#define TOTALSECTORS   (UDIV_ROUNDUP(DISKSIZE, BYTESPERSECTOR))

Definition at line 40 of file fatutil.h.

#define UDIV_ROUNDUP	(		a,
			b
	)		((a + b - 1) / b)

Definition at line 26 of file fatutil.h.

Function Documentation

uint32_t CalculateCountOfClusters

(

DISKIMAGE *

DiskImagePtr

)

Definition at line 148 of file fatutil.c.

void CreateDiskImage

(

DISKIMAGE *

DiskImagePtr

)

Definition at line 198 of file fatutil.c.

int16_t GetFAT12Entry	(	DISKIMAGE *	DiskImagePtr,
		int	FATindex
	)

Definition at line 86 of file fatutil.c.

void InitializeDiskDiskImage

(

DISKIMAGE *

DiskImagePtr

)

Definition at line 175 of file fatutil.c.

void InitializeFAT12

(

DISKIMAGE *

DiskImagePtr

)

Definition at line 120 of file fatutil.c.

void SetDiskMetricsFromDiskImage

(

DISKIMAGE *

DiskImagePtr

)

Definition at line 187 of file fatutil.c.

void SetFAT12Entry	(	DISKIMAGE *	DiskImagePtr,
		int	FATindex,
		unsigned short	FAT12ClusEntryVal
	)

Definition at line 103 of file fatutil.c.

Variable Documentation

int32_t BytesPerSector

Definition at line 168 of file fatutil.c.

int32_t NonDataSectors

Definition at line 171 of file fatutil.c.

int32_t NumFats

Definition at line 169 of file fatutil.c.

int32_t RootEntries

Definition at line 167 of file fatutil.c.

int32_t SectorsPerFat

Definition at line 170 of file fatutil.c.

int32_t StartDataRegion

Definition at line 173 of file fatutil.c.

int32_t TotalSectors

Definition at line 172 of file fatutil.c.