FatFileSystem Class Reference

Integration class for the FatLib library. More...

#include <FatFileSystem.h>

Inheritance diagram for FatFileSystem:

Collaboration diagram for FatFileSystem:

Public Member Functions
bool	begin (uint8_t part=0)
uint8_t	blocksPerCluster () const
uint32_t	blocksPerFat () const
cache_t *	cacheClear ()
bool	chdir (bool set_cwd=false)
bool	chdir (const char *path, bool set_cwd=false)
void	chvol ()
uint32_t	clusterCount () const
uint8_t	clusterSizeShift () const
uint32_t	dataStartBlock () const
int8_t	dbgFat (uint32_t n, uint32_t *v)
bool	exists (const char *path)
uint8_t	fatCount ()
uint32_t	fatStartBlock () const
uint8_t	fatType () const
int32_t	freeClusterCount ()
bool	init ()
bool	init (uint8_t part)
void	ls (uint8_t flags=0)
void	ls (const char *path, uint8_t flags=0)
void	ls (print_t *pr, uint8_t flags)
void	ls (print_t *pr, const char *path, uint8_t flags)
bool	mkdir (const char *path, bool pFlag=true)
File	open (const char *path, uint8_t mode=FILE_READ)
bool	remove (const char *path)
bool	rename (const char *oldPath, const char *newPath)
bool	rmdir (const char *path)
uint16_t	rootDirEntryCount () const
uint32_t	rootDirStart () const
bool	truncate (const char *path, uint32_t length)
FatVolume *	vol ()
uint32_t	volumeBlockCount () const
FatFile *	vwd ()
bool	wipe (print_t *pr=0)

Detailed Description

Integration class for the FatLib library.

Member Function Documentation

bool FatFileSystem::begin ( uint8_t  part = 0 )

inline

Initialize an FatFileSystem object.

Parameters

[in]

part

partition to initialize.

Returns

The value true is returned for success and the value false is returned for failure.

uint8_t FatVolume::blocksPerCluster ( ) const

inlineinherited

Returns

The volume's cluster size in blocks.

uint32_t FatVolume::blocksPerFat ( ) const

inlineinherited

Returns

The number of blocks in one FAT.

cache_t* FatVolume::cacheClear ( )

inlineinherited

Clear the cache and returns a pointer to the cache. Not for normal apps.

Returns

A pointer to the cache buffer or zero if an error occurs.

bool FatFileSystem::chdir ( bool  set_cwd = false )

inline

Change a volume's working directory to root

Changes the volume's working directory to the SD's root directory. Optionally set the current working directory to the volume's working directory.

Parameters

[in]

set_cwd

Set the current working directory to this volume's working directory if true.

Returns

The value true is returned for success and the value false is returned for failure.

bool FatFileSystem::chdir ( const char *  path, bool  set_cwd = false  )

inline

Change a volume's working directory

Changes the volume working directory to the path subdirectory. Optionally set the current working directory to the volume's working directory.

Example: If the volume's working directory is "/DIR", chdir("SUB") will change the volume's working directory from "/DIR" to "/DIR/SUB".

If path is "/", the volume's working directory will be changed to the root directory

Parameters

[in]	path	The name of the subdirectory.
[in]	set_cwd	Set the current working directory to this volume's working directory if true.

Returns

The value true is returned for success and the value false is returned for failure.

void FatFileSystem::chvol ( )

inline

Set the current working directory to a volume's working directory.

This is useful with multiple SD cards.

The current working directory is changed to this volume's working directory.

This is like the Windows/DOS <drive letter>: command.

uint32_t FatVolume::clusterCount ( ) const

inlineinherited

Returns

The total number of clusters in the volume.

uint8_t FatVolume::clusterSizeShift ( ) const

inlineinherited

Returns

The shift count required to multiply by blocksPerCluster.

uint32_t FatVolume::dataStartBlock ( ) const

inlineinherited

Returns

The logical block number for the start of file data.

int8_t FatVolume::dbgFat ( uint32_t  n, uint32_t *  v  )

inlineinherited

Debug access to FAT table

Parameters

[in]	n	cluster number.
[out]	v	value of entry

Returns

true for success or false for failure

bool FatFileSystem::exists ( const char *  path )

inline

Test for the existence of a file.

Parameters

[in]

path

Path of the file to be tested for.

Returns

true if the file exists else false.

uint8_t FatVolume::fatCount ( )

inlineinherited

Returns

The number of File Allocation Tables.

uint32_t FatVolume::fatStartBlock ( ) const

inlineinherited

Returns

The logical block number for the start of the first FAT.

uint8_t FatVolume::fatType ( ) const

inlineinherited

Returns

The FAT type of the volume. Values are 12, 16 or 32.

int32_t FatVolume::freeClusterCount ( )

inherited

Volume free space in clusters.

Returns

Count of free clusters for success or -1 if an error occurs.

bool FatVolume::init ( )

inlineinherited

Initialize a FAT volume. Try partition one first then try super floppy format.

Returns

The value true is returned for success and the value false is returned for failure.

bool FatVolume::init ( uint8_t  part )

inherited

Initialize a FAT volume.

Parameters

[in]

part

The partition to be used. Legal values for part are 1-4 to use the corresponding partition on a device formatted with a MBR, Master Boot Record, or zero if the device is formatted as a super floppy with the FAT boot sector in block zero.

Returns

The value true is returned for success and the value false is returned for failure.

void FatFileSystem::ls ( uint8_t  flags = 0 )

inline

List the directory contents of the volume working directory to Serial.

Parameters

[in]

flags

The inclusive OR of

LS_DATE - Print file modification date

LS_SIZE - Print file size.

LS_R - Recursive list of subdirectories.

void FatFileSystem::ls ( const char *  path, uint8_t  flags = 0  )

inline

List the directory contents of a directory to Serial.

Parameters

[in]	path	directory to list.
[in]	flags	The inclusive OR of

LS_DATE - Print file modification date

LS_SIZE - Print file size.

LS_R - Recursive list of subdirectories.

void FatFileSystem::ls ( print_t *  pr, uint8_t  flags  )

inline

List the directory contents of the volume working directory.

Parameters

[in]	pr	Print stream for list.
[in]	flags	The inclusive OR of

LS_DATE - Print file modification date

LS_SIZE - Print file size.

LS_R - Recursive list of subdirectories.

void FatFileSystem::ls ( print_t *  pr, const char *  path, uint8_t  flags  )

inline

List the directory contents of a directory.

Parameters

[in]	pr	Print stream for list.
[in]	path	directory to list.
[in]	flags	The inclusive OR of

LS_DATE - Print file modification date

LS_SIZE - Print file size.

LS_R - Recursive list of subdirectories.

bool FatFileSystem::mkdir ( const char *  path, bool  pFlag = true  )

inline

Make a subdirectory in the volume working directory.

Parameters

[in]	path	A path with a valid 8.3 DOS name for the subdirectory.
[in]	pFlag	Create missing parent directories if true.

Returns

The value true is returned for success and the value false is returned for failure.

File FatFileSystem::open ( const char *  path, uint8_t  mode = FILE_READ  )

inline

open a file

Parameters

[in]	path	location of file to be opened.
[in]	mode	open mode flags.

Returns

a File object.

bool FatFileSystem::remove ( const char *  path )

inline

Remove a file from the volume working directory.

Parameters

[in]

path

A path with a valid 8.3 DOS name for the file.

Returns

The value true is returned for success and the value false is returned for failure.

bool FatFileSystem::rename ( const char *  oldPath, const char *  newPath  )

inline

Rename a file or subdirectory.

Parameters

[in]	oldPath	Path name to the file or subdirectory to be renamed.
[in]	newPath	New path name of the file or subdirectory.

The newPath object must not exist before the rename call.

The file to be renamed must not be open. The directory entry may be moved and file system corruption could occur if the file is accessed by a file object that was opened before the rename() call.

Returns

The value true is returned for success and the value false is returned for failure.

bool FatFileSystem::rmdir ( const char *  path )

inline

Remove a subdirectory from the volume's working directory.

Parameters

[in]

path

A path with a valid 8.3 DOS name for the subdirectory.

The subdirectory file will be removed only if it is empty.

Returns

The value true is returned for success and the value false is returned for failure.

uint16_t FatVolume::rootDirEntryCount ( ) const

inlineinherited

Returns

The number of entries in the root directory for FAT16 volumes.

uint32_t FatVolume::rootDirStart ( ) const

inlineinherited

Returns

The logical block number for the start of the root directory on FAT16 volumes or the first cluster number on FAT32 volumes.

bool FatFileSystem::truncate ( const char *  path, uint32_t  length  )

inline

Truncate a file to a specified length. The current file position will be maintained if it is less than or equal to length otherwise it will be set to end of file.

Parameters

[in]	path	A path with a valid 8.3 DOS name for the file.
[in]	length	The desired length for the file.

Returns

The value true is returned for success and the value false is returned for failure.

FatVolume* FatFileSystem::vol ( )

inline

Returns

a pointer to the FatVolume object.

uint32_t FatVolume::volumeBlockCount ( ) const

inlineinherited

Returns

The number of blocks in the volume

FatFile* FatFileSystem::vwd ( )

inline

Returns

a pointer to the volume working directory.

bool FatFileSystem::wipe ( print_t *  pr = 0 )

inline

Wipe all data from the volume. You must reinitialize the volume before accessing it again.

Parameters

[in]

pr

print stream for status dots.

Returns

true for success else false.

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The documentation for this class was generated from the following file:

• Arduino/libraries/SdFat/src/FatLib/FatFileSystem.h