Class PPort

java.lang.Object
  PPort

public class PPort

extends Object

This class provides access to the parallel port via JNI. This class is primarly used by the LittleDrinkMachine, since the little drink machine is based on a parallel port interface to the machine electronics.

Version:

$Revision: #3 $

Author:

Bill Kuker [kukester@csh.rit.edu]

Field Summary

(package private) int

address The machine address of the parallel port.

Constructor Summary

PPort(int _address)
Constructs the class by simply saving the passed-in-parameters.

Method Summary

private static int	inb(int port)
static void	main(String[] args) A simple main method to test the class.
void	outb(int b) Sends a single byte out on the port.
private static void	outb(int b, int port) These are function prototypes declaring that the real outb/inb are actually impleted in JNI code.
int	read() Reads a single byte from the port.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

address

int address

The machine address of the parallel port. This is usually the actual memory address of the parallel port interface chipset registers.

Constructor Detail

PPort

public PPort(int _address)

Constructs the class by simply saving the passed-in-parameters.

Method Detail

outb

public void outb(int b)

Sends a single byte out on the port.

read

public int read()

Reads a single byte from the port.

outb

private static void outb(int b,
                         int port)

These are function prototypes declaring that the real outb/inb are actually impleted in JNI code.

inb

private static int inb(int port)

main

public static void main(String[] args)

A simple main method to test the class.