Tukukkk

i want to do com port two way communication with embedded controller using java .when i send some string to controller my controller send me return response

example string 01 04 01 00 00 0C F1 F3

public class SerialClass implements SerialPortEventListener
{

public 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

    "COM9", // Windows

};



public static BufferedReader input;

public static OutputStream output;

/** Milliseconds to block while waiting for port open */

public static final int TIME_OUT = 200;

/** Default bits per second for COM port. */

public static final int DATA_RATE = 9600;



public void initialize() 

{

    CommPortIdentifier portId = null;

    Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();



    //First, Find an instance of serial port as set in PORT_NAMES.

    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 = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));

        output = serialPort.getOutputStream();

        char ch = 1;

        output.write(ch);



        // add event listeners

        serialPort.addEventListener(this);

        serialPort.notifyOnDataAvailable(true);

    }

    catch (Exception e) 

    {

        System.err.println(e.toString());

    }

}



public synchronized void close() 

{

    if (serialPort != null) 

    {

        serialPort.removeEventListener();

        serialPort.close();

    }

}



@Override

public synchronized void serialEvent(SerialPortEvent oEvent) 

{

    if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) 

    {

        try 

        {

            String inputLine=input.readLine();

            System.out.println("aa"+inputLine);

        } 

        catch (Exception e) 

        {

            System.err.println(e.toString());

        }

    }



}



public static synchronized void writeData(String data) 

{

    System.out.println("Sent: " + data);

    try 

    {

        output.write(data.getBytes());

    } 

    catch (Exception e) 

    {

        System.out.println("could not write to port");

    }

}



public static void main(String args) throws Exception {

SerialClass main = new SerialClass();

main.initialize();

Thread t=new Thread() 

{

    public void run() 

    {

        //the following line will keep this app alive for 1000 seconds,

        //waiting for events to occur and responding to them (printing incoming messages to console).

        try 

        {

            Thread.sleep(1500);

            writeData("01 04 01 00 00 0C F1 F3");



            //serialEvent

        } 

        catch (InterruptedException ie) 

        {



        }

    }

};

t.start();

System.out.println("Started");

}

}