Floppy Class Reference

This is the floppy disk driver. More...

#include <floppy.h>

Inherits Block_device.

Inheritance diagram for Floppy:

[legend]Collaboration diagram for Floppy:

[legend]List of all members.

Public Member Functions
virtual void	init ()
virtual void	deinit ()
void	reset ()
void	send_byte (unsigned short int byte)
short int	get_byte ()
bool	wait_for_op (bool sense_interrupt_status)
bool	seek (unsigned char track)
void	recalibrate ()
void	turn_motor_on ()
void	turn_motor_off ()
virtual bool	read_block (unsigned block, void *data)
virtual bool	write_block (unsigned block, void *data)
bool	read_write (unsigned block, void *data, bool read)
void	print ()
Public Attributes
Semaphore	operation_lock
Timer_callback	motor_kill_callback
bool	motor_on
Protected Attributes
DMA_buffer	buffer
bool	disk_change
unsigned char	status [7]
unsigned char	status_size
unsigned char	sr0
unsigned char	current_track
Int_handler	handler
Static Protected Attributes
const Size	BLOCK_SIZE = 512

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Detailed Description

This is the floppy disk driver.

Much of it is based on code by Fabian Nunez.

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Member Function Documentation

void Floppy::deinit (   )  [virtual]

Deinitialize the floppy driver. Implements Block_device.

short int Floppy::get_byte (   )

Receive a byte from the floppy disk controller. Return -1 on timeout.

void Floppy::init (   )  [virtual]

Initialize the floppy driver and reset the drive. Implements Block_device.

void Floppy::print (   )

Print basic information on the floppy driver.

bool Floppy::read_block (  unsigned  block, void *  data )  [virtual]

Read a block of data from disk into the provided 512-byte buffer. Implements Block_device.

bool Floppy::read_write (  unsigned  block, void *  data, bool  read )

Since reads and writes differ only by a few lines, this function handles both. It is called by read_block() and write_block().

void Floppy::recalibrate (   )

Recalibrate the drive.

void Floppy::reset (   )

Reset the floppy drive to a known state.

bool Floppy::seek (  unsigned char  track  )

Seek to the given track.

void Floppy::send_byte (  unsigned short int  byte  )

Send a byte to the floppy disk controller.

void Floppy::turn_motor_off (   )

Start drive motor kill countdown.

void Floppy::turn_motor_on (   )

Turn drive motor on.

bool Floppy::wait_for_op (  bool  sense_interrupt_status  )

Wait for a floppy controller operation to complete. Return false on timeout, true if operation completed.

bool Floppy::write_block (  unsigned  block, void *  data )  [virtual]

Write a block of data to disk from the provided 512-byte buffer. Implements Block_device.

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Member Data Documentation

const Size Floppy::BLOCK_SIZE = 512 [static, protected]

DMA_buffer Floppy::buffer [protected]

floppy read/write data buffer

unsigned char Floppy::current_track [protected]

current track position

bool Floppy::disk_change [protected]

Int_handler Floppy::handler [protected]

floppy interrupt handler

Timer_callback Floppy::motor_kill_callback

timer callback for stopping motor

bool Floppy::motor_on

whether the motor is on

Semaphore Floppy::operation_lock

locked while operation happening

unsigned char Floppy::sr0 [protected]

unsigned char Floppy::status[7] [protected]

unsigned char Floppy::status_size [protected]

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

• floppy.h
• floppy.cc

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Torsion Operating System, Copyright (C) 2000-2004 Dan Helfman