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/***************************************************************************
* Copyright (C) 2005 by David Saxton *
* [email protected] *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
***************************************************************************/
#ifndef PORT_H
#define PORT_H
#include <qstringlist.h>
#include <termios.h>
/**
@author David Saxton
*/
class Port
{
public:
enum ProbeResult
{
ExistsAndRW = 1 << 0,
ExistsButNotRW = 1 << 1,
DoesntExist = 1 << 2
};
Port();
virtual ~Port();
/**
* Returns a list of ports, whose probe status AND's with probeResult.
* This function just returns the combination of the lists for
* SerialPort::ports and ParallelPort::ports.
*/
static QStringList ports( unsigned probeResult );
};
/**
Abstraction for a serial port, allowing control over individual pins.
@author David Saxton
*/
class SerialPort : public Port
{
public:
enum Pin
{
CD = 1, // Carrier detect
RD = 2, // Recieved data
TD = 3, // Transmitted data
DTR = 4, // Data terminal ready
GND = 5, // Signal ground
DSR = 6, // Data set ready
RTS = 7, // Request to send
CTS = 8, // Clear to send
RI = 9, // Ring indicator
};
SerialPort();
~SerialPort();
/**
* Writes state (high or low) to the given pin.
*/
void setPinState( Pin pin, bool state );
bool pinState( Pin pin );
static ProbeResult probe( const QString & port );
/**
* @see Port::ports
*/
static QStringList ports( unsigned probeResult );
/**
* Opens the given port.
* @return if the port could be opened.
* @param baudRate The baud rate as defined in bits/termios.h
*/
bool openPort( const QString & port, speed_t baudRate );
/**
* Closes any currently open port.
*/
void closePort();
protected:
/// Read in on port open; restored on port close
termios m_previousState;
/// File descriptor for the port.
int m_file;
};
/**
Abstraction for a parallel port, allowing control over individual pins.
Based loosely on code in the parapin project; see http://parapin.sf.net
@author David Saxton
*/
class ParallelPort : public Port
{
public:
enum Pin
{
// Data Register
// Offset: Base + 0
// Readable / writable
PIN02 = 1 << 0, // Data 0
PIN03 = 1 << 1, // Data 1
PIN04 = 1 << 2, // Data 2
PIN05 = 1 << 3, // Data 3
PIN06 = 1 << 4, // Data 4
PIN07 = 1 << 5, // Data 5
PIN08 = 1 << 6, // Data 6
PIN09 = 1 << 7, // Data 7
DATA_PINS = PIN02 | PIN03 | PIN04 | PIN05 | PIN06
| PIN07 | PIN08 | PIN09,
// Status Register
// Offset: Base + 1
// Read only
PIN15 = 1 << 11, // Error
PIN13 = 1 << 12, // Online
PIN12 = 1 << 13, // Paper End
PIN10 = 1 << 14, // Ack
PIN11 = 1 << 15, // Busy
STATUS_PINS = PIN15 | PIN13 | PIN12 | PIN10 | PIN11,
// Control Register
// Offset: Base + 2
// Readable / writable
PIN01 = 1 << 16, // Strobe
PIN14 = 1 << 17, // Auto Feed
PIN16 = 1 << 18, // Init
PIN17 = 1 << 19, // Select
CONTROL_PINS = PIN01 | PIN14 | PIN16 | PIN17,
// Pins 18 to 25 are ground
};
enum Register
{
Data = 0,
Status = 1,
Control = 2,
};
/**
* For setting the direction of the Data register or the Control pins.
*/
enum Direction
{
Input = 0,
Output = 1,
};
ParallelPort();
~ParallelPort();
/**
* Opens the given port.
* @return if the port could be opened.
*/
bool openPort( const QString & port );
/**
* Closes any currently open port.
*/
void closePort();
//BEGIN Pin-oriented operations
/**
* @param pins A list of ParallelPort::Pin OR'd together.
*/
void setPinState( int pins, bool state );
/**
* @return the pin states for the given list of pins.
*/
int pinState( int pins );
/**
* Sets the given pins to the given state in the Data register.
*/
void setDataState( uchar pins, bool state );
/**
* Sets the given pins to the given state in the Control register.
*/
void setControlState( uchar pins, bool state );
//END Pin-oriented operations
//BEGIN Register-oriented operations
/**
* Reads and stores the value in the given reigsters, and returns it.
*/
uchar readFromRegister( Register reg );
/**
* Write the given value to the Data register.
*/
void writeToData( uchar value );
/**
* Write the given value to the Control register (any input pins will be
* set to one).
*/
void writeToControl( uchar value );
//END Register-oriented operations
//BEGIN Changing pin directions
/**
* Sets the (input / ouput) direction of the data pins.
*/
void setDataDirection( Direction dir );
/**
* Sets the given pins to the given direction.
*/
void setControlDirection( int pins, Direction dir );
//END Changing pin directions
static ProbeResult probe( const QString & port );
/**
* @see Port::ports
*/
static QStringList ports( unsigned probeResult );
protected:
/**
* Writes the value to the given register.
*/
void writeToRegister( Register reg, uchar value );
void reset();
uchar m_reg[3];
/// Mask of the pins that are currently set as input
int m_inputPins;
/// Mask of the pins that are currently set as output
int m_outputPins;
/// File descriptor for the port.
int m_file;
};
#endif
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