org.halfdog.io.parport
Class ParPort
java.lang.Object
org.halfdog.io.parport.ParPort
- Direct Known Subclasses:
- LinuxParPort, WindowsParPort
- public abstract class ParPort
- extends java.lang.Object
Interface for parallel port access. System specific
implementations of this interface grant access to the
parallel port avoiding ioctls or port write commands.
Warning: Writing data into the control register will
put the data as is into the reg, setting a bit high may
result in a low level on the corresponding output line.
This is because some lines are inverted. You have to xor
the value with CTRL_INVERT to get an electrical high
for each logical 1 bit.
The current version of this driver is in project 7
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
PPORT_WDATA
public static final byte PPORT_WDATA
- See Also:
- Constant Field Values
PPORT_WCTRL
public static final byte PPORT_WCTRL
- See Also:
- Constant Field Values
PPORT_RDATA
public static final byte PPORT_RDATA
- See Also:
- Constant Field Values
PPORT_RSTATUS
public static final byte PPORT_RSTATUS
- See Also:
- Constant Field Values
PPORT_SEQUENCE
public static final byte PPORT_SEQUENCE
- See Also:
- Constant Field Values
CTRL_STROBE
public static final int CTRL_STROBE
- Control flags to set the control lines with the
writeStatus method. If a flag is set the corresponding
line is set to 5V, no matter if signal has to be
internally inverted or not.
- See Also:
- Constant Field Values
CTRL_AUTOFEED
public static final int CTRL_AUTOFEED
- See Also:
- Constant Field Values
CTRL_INIT
public static final int CTRL_INIT
- See Also:
- Constant Field Values
CTRL_SELECT
public static final int CTRL_SELECT
- See Also:
- Constant Field Values
CTRL_DIRECTION
public static final int CTRL_DIRECTION
- See Also:
- Constant Field Values
STATUS_ERROR
public static final int STATUS_ERROR
- See Also:
- Constant Field Values
STATUS_SELECT
public static final int STATUS_SELECT
- See Also:
- Constant Field Values
STATUS_NOPAPER
public static final int STATUS_NOPAPER
- See Also:
- Constant Field Values
STATUS_ACKN
public static final int STATUS_ACKN
- See Also:
- Constant Field Values
STATUS_BUSY
public static final int STATUS_BUSY
- See Also:
- Constant Field Values
CTRL_INVERT
public static final int CTRL_INVERT
- See Also:
- Constant Field Values
STATUS_INVERT
public static final int STATUS_INVERT
- See Also:
- Constant Field Values
ParPort
public ParPort()
createPort
public static ParPort createPort(java.lang.String dev)
throws java.io.IOException
- Get a parallel port object matching the current os
- Throws:
java.io.IOException
read
public abstract byte read()
throws java.io.IOException
- Throws:
java.io.IOException
write
public abstract void write(byte b)
throws java.io.IOException
- Throws:
java.io.IOException
readStatus
public abstract byte readStatus()
throws java.io.IOException
- Throws:
java.io.IOException
writeControl
public abstract void writeControl(byte b)
throws java.io.IOException
- Throws:
java.io.IOException
createSequence
public abstract Sequence createSequence()
doSequence
public abstract byte[] doSequence(Sequence seq)
throws java.io.IOException
- Throws:
java.io.IOException