Hi Spamzor,
Sorry for any late replies. I had to look all over for a java sample. Here it is below. This program will take keypad inputs and display them on the LCD.
/**
* LCDControl.java
*
* Author: Owen Langman (
langman@cs.wisc.edu)
*
* Description:
* Basic commands to control a Matrix Orbital (we love MO!)
* LCD screen.
*
* NOTE: This requires the javax.comm package.
* Check java.sun.com
**/
import java.io.*;
import java.util.*;
import javax.comm.*;
/**
* Collection of methods to control a Matrix Orbital LCD.
*
* <p> Bugs: None known.
*
* @author Owen Langman (
langman@cs.wisc.edu)
*
**/
public class LCDControl {
private CommPortIdentifier portId;
private SerialPort serialPort;
private OutputStream outputStream;
public static final char COMMAND_START = (char)254;
public static final char COMMAND_NULL = (char)0;
public static final char COMMAND_ETX = (char)3;
public static final char COMMAND_DEL = (char)253;
/**
* Constructor. Uses COM1 as the default port.
*
**/
public LCDControl() {
this(1); //uses com1 with default const.
}
/**
* Constructor. Initializes COM port and resets the LCD.
*
* @param port Interger specifying the COM port to output to.
**/
public LCDControl(int port) {
String portname = new String("COM");
portname += port;
try {
portId = CommPortIdentifier.getPortIdentifier(portname);
} catch (NoSuchPortException ex) {
System.out.println(portname + " does not exist.");
return;
}
try {
serialPort = (SerialPort)portId.open("LCDControl",2000);
} catch (PortInUseException ex) {
System.out.println("Could not open " + portname);
return;
}
try {
serialPort.setSerialPortParams(19200,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException ex) {
System.out.println("Could not set serial stuff");
}
try {
outputStream = serialPort.getOutputStream();
} catch (IOException e) {}
resetLCD();
}
/**
* Resets the lcd in every way possible.
*/
public void resetLCD() {
String resetString;
resetString = new String(COMMAND_START + "B" + COMMAND_NULL +
COMMAND_START + "~" + COMMAND_NULL + COMMAND_START +
"T" + COMMAND_START + "Y" + COMMAND_ETX +
COMMAND_START + "X");
try {
outputStream.write(resetString.getBytes());
} catch (Exception ex) {
System.out.println("Could not reset lcd");
}
}
/**
* Clears the LCD screen.
*/
public void clear() {
String clearString;
clearString = new String(COMMAND_START + "X");
try {
outputStream.write(clearString.getBytes());
} catch (Exception ex) {
System.out.println("Could not clear lcd");
}
}
/**
* Writes a string to the screen at the cursor's current
* position.
*
* @param str String to write to the screen.
*/
public void display_write(String str) {
try {
outputStream.write(str.getBytes());
} catch (Exception ex) {
System.out.println("Could not write to lcd");
}
}
/**
* Changes position of the lcd's cursor.
*
* @param x Horizontal index to move the cursor to
* @param y Line number to move the cursor to
*/
public void display_position(int x, int y) {
String displayString;
displayString = new String(COMMAND_START + "G");
try {
outputStream.write(displayString.getBytes());
outputStream.write(y);
outputStream.write(x);
} catch (Exception ex) {
System.out.println("Could not change cursor position on lcd");
}
}
/**
* Full clear then shutdown of the LCD
*/
public void display_close() {
String clearString, closeString;
clearString = new String(COMMAND_START + "X");
closeString = new String(COMMAND_START + "F");
try {
outputStream.write(clearString.getBytes());
outputStream.write(closeString.getBytes());
} catch (Exception ex) {
System.out.println("Could not close lcd");
}
}
}
