Gui question

[Playagood]

Allo

Starting a new project on sending/receiving data with the arduino and eclipse via serial port. This is the tutorial presented by Arduino Arduino Playground - Java.

Everything works fine now...(since I don't have much knowledge with eclipse/java, it tooks me about 2 weeks to figure it out).

Project goal: Creating a runnable jar file(application) which print out the data received from the arduino.

Project status right now: Monitor the data received from the Arduino and print out the message in the eclipse console

Next step I want to achieve: Print this message on a simple design application.(one button , one text area)

Note: WindowBuilder installed.

Thank you if you give me hints

Here is the method that generates the print out:

public synchronized void serialEvent(SerialPortEvent oEvent) {
if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
try {
int available = input.available();
byte chunk[] = new byte[available];
input.read(chunk, 0, available);

// Displayed results are codepage dependent
System.out.print(new String(chunk));

Here is the full project code from Arduino website:

import java.io.InputStream;
import java.io.OutputStream;
import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent;
import gnu.io.SerialPortEventListener;
import java.util.Enumeration;

public class SerialTest implements SerialPortEventListener {
SerialPort serialPort;
/** The port we're normally going to use. */
private static final String PORT_NAMES[] = {
"/dev/tty.usbserial-A9007UX1", // Mac OS X
"/dev/ttyUSB0", // Linux
"COM3", // Windows
};
/** Buffered input stream from the port */
private InputStream input;
/** The output stream to the port */
private OutputStream output;
/** Milliseconds to block while waiting for port open */
private static final int TIME_OUT = 2000;
/** Default bits per second for COM port. */
private static final int DATA_RATE = 9600;

public void initialize() {
CommPortIdentifier portId = null;
Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();

// iterate through, looking for the port
while (portEnum.hasMoreElements()) {
CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
for (String portName : PORT_NAMES) {
if (currPortId.getName().equals(portName)) {
portId = currPortId;
break;
}
}
}

if (portId == null) {
System.out.println("Could not find COM port.");
return;
}

try {
// open serial port, and use class name for the appName.
serialPort = (SerialPort) portId.open(this.getClass().getName(),
TIME_OUT);

// set port parameters
serialPort.setSerialPortParams(DATA_RATE,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);

// open the streams
input = serialPort.getInputStream();
output = serialPort.getOutputStream();

// add event listeners
serialPort.addEventListener(this);
serialPort.notifyOnDataAvailable(true);
} catch (Exception e) {
System.err.println(e.toString());
}
}

/**
* This should be called when you stop using the port.
* This will prevent port locking on platforms like Linux.
*/
public synchronized void close() {
if (serialPort != null) {
serialPort.removeEventListener();
serialPort.close();
}
}

/**
* Handle an event on the serial port. Read the data and print it.
*/
public synchronized void serialEvent(SerialPortEvent oEvent) {
if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
try {
int available = input.available();
byte chunk[] = new byte[available];
input.read(chunk, 0, available);

// Displayed results are codepage dependent
System.out.print(new String(chunk));
} catch (Exception e) {
System.err.println(e.toString());
}
}
// Ignore all the other eventTypes, but you should consider the other ones.
}

public static void main(String[] args) throws Exception {
SerialTest main = new SerialTest();
main.initialize();
System.out.println("Started");
}
}

[DarrylBurke]

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[Playagood]

thank you

[kaydell2]

1. To create a .jar from Eclipse, choose "Export" from the "File" menu and then choose "Java" and then choose "Runnable Jar". You'll probably have to include a .jar file with your libraries in it for your serial communications stuff.

2. To have a simple GUI and have your output go there instead of going to the console, you could implement a JTextArea like this:

ConsolePrintWriter.java

import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;

import javax.swing.JTextArea;

class ConsoleWriter extends Writer {
	
	private JTextArea jTextArea;
	
	public ConsoleWriter(JTextArea jTextArea) {
		this.jTextArea = jTextArea;
	}
	
	public JTextArea getTextArea() {
		return jTextArea;
	}
	
	public void setTextArea(JTextArea jTextArea) {
		this.jTextArea = jTextArea;
	}

	public String charBufToString(char[] cbuf, int off, int len) {
		StringBuffer sb = new StringBuffer();
		int max = Math.min(off+len, cbuf.length);
		for (int i = 0; i < max; i++) {
			char ch = cbuf[i];
			sb.append(ch);
		}
		return sb.toString();
	}

	@Override
	public void write(char[] cbuf, int off, int len) throws IOException {
		String string = charBufToString(cbuf, off, len);
		jTextArea.append(string);
	}

	@Override
	public void close() throws IOException {
		// TODO we should probably have a flag of whether the writer is open or not
	}

	@Override
	public void flush() throws IOException {
	}
	
}

public class ConsolePrintWriter extends PrintWriter {
	
	public ConsolePrintWriter(JTextArea jTextArea) {
		super(new ConsoleWriter(jTextArea));
	}
	
	public JTextArea getTextArea() {
		ConsoleWriter consoleWriter = (ConsoleWriter)out;
		return consoleWriter.getTextArea();
	}

}

ConsoleFrame.java

import java.lang.reflect.InvocationTargetException;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;

public class ConsoleFrame {

	private JFrame jFrame;
	private ConsolePrintWriter consolePrintWriter;

	public ConsoleFrame() throws InterruptedException, InvocationTargetException {
		SwingUtilities.invokeAndWait(new Runnable() {
			public void run() {
				jFrame = new JFrame("Console");
				JTextArea jTextArea = new JTextArea();
				jTextArea.setEditable(false);
				JScrollPane jScrollPane = new JScrollPane(jTextArea);
				consolePrintWriter = new ConsolePrintWriter(jTextArea);
				jFrame.add(jScrollPane);
				jFrame.setSize(500,500);
				jFrame.setVisible(true);
			}
		});
	}

	public static void main(String[] args) throws InterruptedException, InvocationTargetException {
		
		// create a window to test the ConsolePrintWriter
		ConsoleFrame consoleFrame = new ConsoleFrame();
		
		// get a reference to the ConsolePrintWriter
		ConsolePrintWriter out = consoleFrame.consolePrintWriter;
		
		// test printing out the the ConsolePrintWriter because it's a type of PrintWriter
		out.println("Hello World");
		out.println("More Stuff");
		out.println(1.0); // test printing a double
		for (int i = 1; i <= 100; i++) {
			out.println(i);
		}
	}

}

[Playagood]

Thank you for your reply...I will give it a try!!!