#include <Adafruit_Floppy.h>

Inheritance diagram for Adafruit_MFM_Floppy:

Public Member Functions
	Adafruit_MFM_Floppy (Adafruit_Floppy *floppy, adafruit_floppy_disk_t format=AUTODETECT)
	Instantiate an MFM-formatted floppy. More...

bool	begin (void)
	Initialize and spin up the floppy drive. More...

void	end (void)
	Spin down and deselect the motor and drive.

uint32_t	size (void) const
	Quick calculator for expected max capacity. More...

int32_t	readTrack (int track, bool head)
	Read one track's worth of data and MFM decode it. More...

uint8_t	sectors_per_track (void) const
	The expected number of sectors per track in this format. More...

uint8_t	tracks_per_side (void) const
	The expected number of tracks per side in this format. More...

bool	dirty () const
	Check if there is data to be written to the current track. More...

void	removed ()
	Call when the media has been removed. More...

bool	inserted (adafruit_floppy_disk_t format)
	Call when media has been inserted. More...

virtual bool	isBusy ()
	Check if device busy. More...

virtual uint32_t	sectorCount ()
	Max capacity in sector block. More...

virtual bool	syncDevice ()
	Sync written blocks NOT IMPLEMENTED YET. More...

virtual bool	readSector (uint32_t block, uint8_t *dst)
	Read a 512 byte block of data, may used cached data. More...

virtual bool	readSectors (uint32_t block, uint8_t *dst, size_t ns)
	Read multiple 512 byte block of data, may used cached data. More...

virtual bool	writeSector (uint32_t block, const uint8_t *src)
	Write a 512 byte block of data NOT IMPLEMENTED YET. More...

virtual bool	writeSectors (uint32_t block, const uint8_t *src, size_t ns)
	Write multiple 512 byte blocks of data NOT IMPLEMENTED YET. More...

Public Attributes
uint8_t	track_data [MFM_IBMPC1440K_SECTORS_PER_TRACK *MFM_BYTES_PER_SECTOR]

uint8_t	track_validity [MFM_IBMPC1440K_SECTORS_PER_TRACK]

Detailed Description

This class adds support for the BaseBlockDriver interface to an MFM encoded floppy disk. This allows it to be used with SdFat's FatFileSystem class. or for a mass storage device

Constructor & Destructor Documentation

◆ Adafruit_MFM_Floppy()

Adafruit_MFM_Floppy::Adafruit_MFM_Floppy	(	Adafruit_Floppy *	floppy,
		adafruit_floppy_disk_t	format = `AUTODETECT`
	)

Instantiate an MFM-formatted floppy.

Parameters

floppy	An Adafruit_Floppy object that has the pins defined
format	What kind of format we will be parsing out - we DO NOT autodetect!

Member Function Documentation

◆ begin()

bool Adafruit_MFM_Floppy::begin ( void )

Initialize and spin up the floppy drive.

Returns: True if we were able to spin up and detect an index track

◆ size()

uint32_t Adafruit_MFM_Floppy::size ( void ) const

Quick calculator for expected max capacity.

Returns: Size of the drive in bytes

◆ readTrack()

int32_t Adafruit_MFM_Floppy::readTrack	(	int	logical_track,
		bool	head
	)

Read one track's worth of data and MFM decode it.

Parameters

logical_track	the logical track number, 0 to whatever is the max tracks for the given format during instantiation (e.g. 40 for DD, 80 for HD)
head	which side to read, false for side 1, true for side 2

Returns: Number of sectors captured, or -1 if we couldn't seek

◆ sectors_per_track()

uint8_t Adafruit_MFM_Floppy::sectors_per_track ( void ) const

inline

The expected number of sectors per track in this format.

!

Returns: The number of sectors per track

◆ tracks_per_side()

uint8_t Adafruit_MFM_Floppy::tracks_per_side ( void ) const

inline

The expected number of tracks per side in this format.

!

Returns: The number of tracks per side

◆ dirty()

bool Adafruit_MFM_Floppy::dirty ( ) const

inline

Check if there is data to be written to the current track.

!

Returns: True if data needs to be written out

◆ removed()

void Adafruit_MFM_Floppy::removed ( )

Call when the media has been removed.

!

◆ inserted()

bool Adafruit_MFM_Floppy::inserted ( adafruit_floppy_disk_t format )

Call when media has been inserted.

!

Parameters

format The hard coded format or AUTODETECT to try several common formats

Returns: True if media is hard coded or if the media was detected by autodetect

◆ isBusy()

bool Adafruit_MFM_Floppy::isBusy ( )

virtual

Check if device busy.

Returns: true if busy

◆ sectorCount()

uint32_t Adafruit_MFM_Floppy::sectorCount ( )

virtual

Max capacity in sector block.

Returns: Size of the drive in sector (512 bytes)

◆ syncDevice()

bool Adafruit_MFM_Floppy::syncDevice ( )

virtual

Sync written blocks NOT IMPLEMENTED YET.

Returns: True on success, false if failed or unimplemented

◆ readSector()

bool Adafruit_MFM_Floppy::readSector	(	uint32_t	block,
		uint8_t *	dst
	)

virtual

Read a 512 byte block of data, may used cached data.

Parameters

block	Block number, will be split into head and track based on expected formatting
dst	Destination buffer

Returns: True on success

◆ readSectors()

bool Adafruit_MFM_Floppy::readSectors	(	uint32_t	block,
		uint8_t *	dst,
		size_t	nb
	)

virtual

Read multiple 512 byte block of data, may used cached data.

Parameters

block	Starting block number, will be split into head and track based on expected formatting
dst	Destination buffer
nb	Number of blocks to read

Returns: True on success

◆ writeSector()

bool Adafruit_MFM_Floppy::writeSector	(	uint32_t	block,
		const uint8_t *	src
	)

virtual

Write a 512 byte block of data NOT IMPLEMENTED YET.

Parameters

block	Block number, will be split into head and track based on expected formatting
src	Source buffer

Returns: True on success, false if failed or unimplemented

◆ writeSectors()

bool Adafruit_MFM_Floppy::writeSectors	(	uint32_t	block,
		const uint8_t *	src,
		size_t	nb
	)

virtual

Write multiple 512 byte blocks of data NOT IMPLEMENTED YET.

Parameters

block	Starting lock number, will be split into head and track based on expected formatting
src	Source buffer
nb	Number of consecutive blocks to write

Returns: True on success, false if failed or unimplemented

Member Data Documentation

◆ track_data

uint8_t Adafruit_MFM_Floppy::track_data[MFM_IBMPC1440K_SECTORS_PER_TRACK *MFM_BYTES_PER_SECTOR]

! The raw byte decoded data from the last track read

◆ track_validity

uint8_t Adafruit_MFM_Floppy::track_validity[MFM_IBMPC1440K_SECTORS_PER_TRACK]

! Which tracks from the last track-read were valid MFM/CRC!

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

src/Adafruit_Floppy.h
src/Adafruit_MFM_Floppy.cpp

Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Adafruit_MFM_Floppy()

Member Function Documentation

◆ begin()

◆ size()

◆ readTrack()

◆ sectors_per_track()

◆ tracks_per_side()

◆ dirty()

◆ removed()

◆ inserted()

◆ isBusy()

◆ sectorCount()

◆ syncDevice()

◆ readSector()

◆ readSectors()

◆ writeSector()

◆ writeSectors()

Member Data Documentation

◆ track_data

◆ track_validity