Cofiguration of serial port

Projects Libraries
1

Hello,
I'am a student , i am begginer in programmaion Arduino.I should configure my serial port with net beans in order to know what can i send and what i recieve.
So I used com0com and rxtx to write a little java program to intercept the bytes between avrdude and my usual com port (COM3) to see what exactly was being sent and received.

My code is:

import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;


public class ComProxy {
	public static final String applicationComPort = "COM7";
	public static final String deviceComport = "COM3";
    public static final int baud=19200;


	static InputStream input1;
	static OutputStream output1;

	static InputStream input2;
	static OutputStream output2;

	static OutputStream out;

	public static void main(String[] args) throws Exception {
//		out=new FileOutputStream("/comproxy.log");
		out=System.out;

		CommPortIdentifier portId1 = CommPortIdentifier
		.getPortIdentifier(applicationComPort);

		CommPortIdentifier portId2 = CommPortIdentifier
		.getPortIdentifier(deviceComport);

		System.out.println("Serial Proxy Starting");
		System.out.println("Serial application port: " + portId1.getName());
		System.out.println("Serial proxied to device port: " + portId2.getName());


		SerialPort port1 = (SerialPort) portId1.open("serial madness1", 4000);
		input1 = port1.getInputStream();
		output1 = port1.getOutputStream();
		port1.setSerialPortParams(baud,
				SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
				SerialPort.PARITY_NONE);
		//this assumes the application starts the serial conversation
		   while(input1.available() > 0){ input1.read();};
			  System.out.println("waiting for "+applicationComPort+" activity...");
		   while(input1.available() ==0);


		SerialPort port2 = (SerialPort) portId2.open("serial madness2", 4001);
		input2 = port2.getInputStream();
		output2 = port2.getOutputStream();
		port2.setSerialPortParams(baud,
				SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
				SerialPort.PARITY_NONE);
		   while(input2.available() > 0){ input2.read();};



		  System.out.println("proxy started");

		while (true) {
		  int c;
		  if(input1.available() > 0){
			  c=input1.read();
			  out.write(("I"+hexval(c)+"\n").getBytes());
			  output2.write(c);
		  }
		  if(input2.available() > 0){
			  c=input2.read();
			  out.write(("O"+hexval(c)+"\n").getBytes());
			  output1.write(c);
		  }
		}
	}
	public static void waitfor(int w) throws Exception{
		int c;
		do{
			while(input2.available() == 0);
			c=input2.read();
			System.out.println((char)c + " " + (int) c);
		}while(c != w);
	}


static String hexvals[] = {
	"0", "1","2","3","4","5","6","7","8","9", "A", "B", "C", "D", "E","F"};

static String hexval(int i){
	return hexvals[i/16] + hexvals[i%16];
}
}

But in compilation i have this error message :
*
Java lib Version = RXTX-2.1-7
WARNING: RXTX Version mismatch
Jar version = RXTX-2.1-7
native lib Version = RXTX-2.1-7pre16
Exception in thread "main" gnu.io.NoSuchPortException
at gnu.io.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:218)
at test.Test.main(Test.java:28)
Java Result: 1
BUILD SUCCESSFUL (total time: 15 seconds)

I don’t know really what’s the error.

Can you help me please.
Thank you for advance!

Moderator edit: changed to [code] [/code] tags.

2

To see the bytes actually send it is easier to press the SHIFT key while uploading.
most/all of the communication will appear in the debugging window.

(to see this allways you can set build.verbose=true and upload.verbose=true in the preferences.txt file before starting the IDE.

3

hi,
First thank you very much for your reply
Where can i found the file preferences.txt please???
thanks for advance!!!

4

Start the Arduino IDE
File menu ==> Preferences somewhere bottom of the window is a link to the file.