[Tinyos-help] javacomm version 3 on Linux Ubuntu - serial port not receiving data

[Miguel Ángel «MrNet»]

Hi, I've installed javacomm version 3 on Ubuntu 'Gutsy Gibbon' and I've set up successfully,
but my code it's only capable of transmitting data and not receiving it (!!!).

SUMMARY:

Device: TMOTE IV
API: TinyOS 1.0.x
Comm: javacomm v3.0-u1
OS: Linux Ubuntu 'Gutsy Gibbon'
Driver USB-Serial: ftdi_sio included in the Linux kernel.

I'm using the /dev/ttyS0 port to communicate with the USB device on /dev/2-1 via the ftdi_sio driver.

The problem isn't the port permissions:
crw-rw-rw- 1 root root 189, 129 2007-11-14 18:24 /dev/2-1
crw-rw-rw- 1 root dialout 4, 64 2007-11-14 18:22 /dev/ttyS0

I attatch my code because any person could help me. NOTE: This code works smoothly on Windows, and in Linux I can open the port and set up it, even send data, but I'm not receiving anything...

In the comments I read some warnings about working on Linux, but I don't fully understand them to modify the code.


*** CODE: ***

package net.tinyos.packet;

import java.util.*;
import java.io.*;
import javax.comm.*;
import javax.swing.JOptionPane;
 

/**
 * A serial port byte source, with extra special hack to deal with
 * broken javax.comm implementations (IBM's javax.comm does not set the
 * port to raw mode, on Linux, at least in some implementations - call
 * an external program (tinyos-serial-configure) to "fix" this)
 */
public class SerialByteSource extends StreamByteSource implements SerialPortEventListener
{
    private SerialPort serialPort;
    private String portName;
    private int baudRate;
   
    
    public SerialByteSource(String portName, int baudRate) {
	this.portName = portName;
	this.baudRate = baudRate;
    }

    public void openStreams() throws IOException {
	CommPortIdentifier portId = null;
	try {
	    portId = CommPortIdentifier.getPortIdentifier(portName);
           
	}
	catch (NoSuchPortException e) {
           
           
          throw new IOException("Invalid port. " + allPorts());
        }   
	try {
	    serialPort = (SerialPort)portId.open("SerialByteSource",
						 CommPortIdentifier.PORT_SERIAL);
            String own = serialPort.getName();
	}
	catch (PortInUseException e) {
           throw new IOException("Port " + portName + " busy");
	}

	try {
	    serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
	    serialPort.setSerialPortParams(baudRate,
					   SerialPort.DATABITS_8,
					   SerialPort.STOPBITS_1,
					   SerialPort.PARITY_NONE);

	    serialPort.addEventListener(this);
	    serialPort.notifyOnDataAvailable(true);
	}
	catch (Exception e) {
           serialPort.close();
	    throw new IOException("Couldn't configure " + portName);
	}

	// Try & run external program to setup serial port correctly
	// (necessary on Linux, IBM's javax.comm leaves port in cooked mode)
	try {
	    Runtime.getRuntime().exec("tinyos-serial-configure " + portName);
	}
	catch (IOException e) { }

	is = serialPort.getInputStream();
	os = serialPort.getOutputStream();
        
     
    }

    public void closeStreams() throws IOException {
	serialPort.close();
    }

    public String allPorts() {
	Enumeration ports = CommPortIdentifier.getPortIdentifiers();
	if (ports == null)
	    return "No comm ports found!";

	boolean  noPorts = true;
	String portList = "Known serial ports:\n";
	while (ports.hasMoreElements()) {
	    CommPortIdentifier port = (CommPortIdentifier)ports.nextElement();

	    if (port.getPortType() == CommPortIdentifier.PORT_SERIAL) {
		portList += "- " + port.getName() + "\n";
		noPorts = false;
	    }
	}
	if (noPorts)
	    return "No comm ports found!";
	else
	    return portList;
    }

    Object sync = new Object();

    public byte readByte() throws IOException {
	// On Linux at least, javax.comm input streams are not interruptible.
	// Make them so, relying on the DATA_AVAILABLE serial event.
	synchronized (sync) {
	    while (is.available() == 0) {
		try {
		    sync.wait();
		}
		catch (InterruptedException e) {
		    close();
		    throw new IOException("interrupted");
		}
	    }
	}

	return super.readByte();        ///////// -> VIEW THE NEXT CLASS
    }

    public void serialEvent(SerialPortEvent ev) {
    	
		// DEBUG
		System.out.println(this.getClass().getName()+ ": serialEvent: EVENTO.");

		if (ev.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
			
			// DEBUG
			System.out.println(this.getClass().getName()+ ": serialEvent: DATOS DISPONIBLES.");
			
			synchronized (sync) {
				sync.notify();
			}
			
		}
		
     }

}



////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

package net.tinyos.packet;


import java.io.*;

abstract public class StreamByteSource implements ByteSource
{
    protected InputStream is;
    protected OutputStream os;
    private boolean opened;

    protected StreamByteSource() {
    }

    abstract protected void openStreams() throws IOException;
    abstract protected void closeStreams() throws IOException;

    public void open() throws IOException {
	openStreams();
	opened = true;
    }

    public void close() {
	if (opened) {
	    opened = false;
	    try { 
		os.close(); 
		is.close();
		closeStreams();
	    }
	    catch (Exception e) { }
	}
    }

    public byte readByte() throws IOException {
	int serialByte;

	if (!opened)
	    throw new IOException("not open");

	try {
	    serialByte = is.read();
	}
	catch (IOException e) {
 	    serialByte = -1;
	}

	if (serialByte == -1) {
	    close();
	    throw new IOException("read error");
	}

	return (byte)serialByte;
    }

    public void writeBytes(byte[] bytes) throws IOException {
	if (!opened)
	    throw new IOException("not open");

	try {
	    os.write(bytes);
	    os.flush();
	}
	catch (IOException e) {
	    close();
	    throw new IOException("write error");
	}
    }
}

I'm going crazy with this, so any help would be wellcomed!!!

Thank you very much. :-)
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