Discussion :

[poiuyu]

Bonjour,
J'utilise javax.comm pour lire un port COM avec mon appli java (j'ai le meme problème avec RXTX), lorsque j'ai une IOException (sans doute du à une erreur de connexion entre le Lantronix Wi-Port et mon PC où je redirige le flux vers le port COM); je ferme mon port et le reouvre et en general ca remarche. Mais parfois j'obtiens une PortInUseException lors de la réouverture du port alors que le portId.isCurrentlyOwned() renvoi "false".
Note: parfois le port apparaît miraculeusement comme non occupé et ca remarche.

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Trying to open serial port 'COM20'!
Successfully opened serial port 'COM20'!
 
CA MARCHE- Tue Aug 20 16:48:52 CEST 2013
 
CA MARCHE- Tue Aug 20 16:48:54 CEST 2013
 
CA MARCHE- Tue Aug 20 16:48:56 CEST 2013
 
(plus tard)
 
CA MARCHE- Tue Aug 20 18:55:47 CEST 2013
 
CA MARCHE- Tue Aug 20 18:55:49 CEST 2013
 
CA MARCHE- Tue Aug 20 18:55:51 CEST 2013
 
waiting ...
waiting ...
waiting ...
waiting ...
waiting ...
echec ...
 
java.io.IOException: write error
	at com.sun.comm.Win32SerialPort.write(Win32SerialPort.java:677)
	at com.sun.comm.Win32SerialPort.write(Win32SerialPort.java:664)
	at com.sun.comm.Win32SerialOutputStream.write(Win32SerialOutputStream.java:34)
	at java.io.DataOutputStream.write(Unknown Source)
	at projet.RS232.demandecontext1(RS232.java:774)
	at projet.RS232.readBytes(RS232.java:441)
	at projet.GUI$Thread1.run(GUI.java:1981)
	at java.lang.Thread.run(Unknown Source)
trying to close system
succes to close system
 
Trying to to open serial port 'COM20'!
Failed to open serial port 'COM20'!
javax.comm.PortInUseException: Port currently owned by Unknown Windows Application
	at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337)
	at projet.RS232.openConnection(RS232.java:333)
	at projet.GUI$Thread1.run(GUI.java:1988)
	at java.lang.Thread.run(Unknown Source)
 
Trying to to open serial port 'COM20'!
Failed to open serial port 'COM20'!
javax.comm.PortInUseException: Port currently owned by Unknown Windows Application
	at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337)
	at projet.RS232.openConnection(RS232.java:333)
	at projet.GUI$Thread1.run(GUI.java:1988)
	at java.lang.Thread.run(Unknown Source)
 
Trying to to open serial port 'COM20'!
Failed to open serial port 'COM20'!
javax.comm.PortInUseException: Port currently owned by Unknown Windows Application
	at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337)
	at projet.RS232.openConnection(RS232.java:333)
	at projet.GUI$Thread1.run(GUI.java:1988)
	at java.lang.Thread.run(Unknown Source)

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		//dans le GUI
			cmdSTART.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent evt){
					lancer();
				}
 
 
	private void lancer(){
		if(rs232.openConnection()){
			animated1=true;
			t1=new Thread(new Thread1());
			t1.setPriority(7);
			t1.start();
			marche=true;
		}
	}
 
	class Thread1 implements Runnable{
		public void run(){
			while(animated1){
				try{
					rs232.readBytes();
				}
				catch(Exception e){
					e.printStackTrace();
					rs232.closeConnection();
					boolean nbbyte=false;
					while(nbbyte==false){
						nbbyte=rs232.openConnection();
						try{
							Thread.sleep(5000);
						}
						catch(InterruptedException e1){
							e1.printStackTrace();
						}
					}
				}
			}
		}
	}

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public void readBytes() throws IOException,InterruptedException{
		demandecontext1();
		receptdata();
		traitementdata();
		try{
			Thread.sleep(300);
		}
		catch(InterruptedException e){
			e.printStackTrace();
		}
	}
 
	private void demandecontext1() throws IOException,InterruptedException{
/*ligne 774*/out1x.write(91);
		out1x.write(91);
		Thread.sleep(100);
		out1x.write(48);
		Thread.sleep(100);
		out1x.write(65);
		Thread.sleep(100);
		out1x.write(48);
		Thread.sleep(100);
		out1x.write(48);
		Thread.sleep(100);
		out1x.write(48);
		Thread.sleep(100);
		out1x.write(49);
		Thread.sleep(100);
		out1x.write(93);
		Thread.sleep(1000);
	}
 
	private void receptdata() throws IOException,InterruptedException{
		byte bufferByte[]=new byte[1024]
		int nbbyte=in1x.available();
		int comp=0;
		while(nbbyte==0&&comp<5){
			System.out.println("waiting ...");
			Thread.sleep(1000);
			nbbyte=in1x.available();
			comp++;
		}
		if(comp==5){
			System.out.println("echec ...");
			return;
		}
		nbbyte=in1x.read(bufferByte,0,nbbyte);
		System.out.println("CA MARCHE- "+new Date());
 
		//+Gestion des bytes recu
 
	}
 
 
	public boolean openConnection(){
		if(portId1x.isCurrentlyOwned()){
			System.out.println("Port ouvert par une autre application");
			System.out.println(portId1x.getCurrentOwner());
			return false;
		}
		else{
			try{
				System.out.println("Trying to to open serial port '"+com1x+"'!");
				boolean flag1=portId1x.isCurrentlyOwned();
				if(flag1){
					System.out.println("port ="+!flag1);
				}
/*ligne 333*/	serialPort1x=(SerialPort) portId1x.open(appName,openTimeOut);
				System.out.println("Successfully opened serial port '"+serialPort1x.getName()+"'!");
 
				// Setting the serial connection as requested...
				serialPort1x.setSerialPortParams(baudrate1,databits,stopbit,parity);
				in1x=new DataInputStream(serialPort1x.getInputStream());
				out1x=new DataOutputStream(serialPort1x.getOutputStream());
				return true;
			}
			catch(Exception e){
				System.out.println("Failed to open serial port '"+serialPort1x[p].getName()+"'!");
				e.printStackTrace();
				return false;
				// JOptionPane.showMessageDialog(null,"Erreur lors de l'ouverture du port "
				// + com, "ERREUR", JOptionPane.ERROR_MESSAGE);
				// System.exit(1); // sortie de l'appli
			}
		}
	}
 
	public void closeConnection(){
		try{
			System.out.println("trying to close system ");
			in1x.close();
			out1x.close();
			serialPort1x.close();
			System.out.println("succes to close system ");
		}
		catch(IOException e){
			System.out.println("failed to close intrusion system ");
			System.out.println("Cannot open and / or close serial connection!Details:\n"+e.getMessage());
			//System.exit(1);
		}
	}