[Rxtx] Baud rate problem

[Mike Markowski]

Andy and all,

It works fine with minicom as well as my own C code and Java using rxtx 
2.1.7.  I tried to make a minimal example which is tacked on below.  
Here is output running the same program but first using 2.1.7r2 and then 
2.2-2:

mm at ab3ap ~/baudTest $ java -classpath "217/RXTXcomm.jar:." 
-Djava.library.path=217 Baud
Experimental:  JNI_OnLoad called.
Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
RXTX Warning:  Removing stale lock file. /var/lock/LCK..ttyUSB0
RVM04.39;

mm at ab3ap ~/baudTest $ java -classpath "222/RXTXcomm.jar:." 
-Djava.library.path=222 Baud
WARNING:  RXTX Version mismatch
         Jar version = RXTX-2.2pre1
         native lib Version = RXTX-2.2pre2
Unsupported comm op.
[Never returns here till I hit a ctrl-C]

And the code is below.  (The RVM command returns firmware version.)  
Many thanks for your ideas.

Mike

import gnu.io.*;
import java.io.*;

public class Baud {

     public static void main(String args[]) throws Exception {

         CommPortIdentifier portId
             = CommPortIdentifier.getPortIdentifier("/dev/ttyUSB0");
         SerialPort sport
             = (SerialPort) portId.open("Baud rate test", 2000);

         sport.setSerialPortParams(38400, SerialPort.DATABITS_8,
             SerialPort.STOPBITS_2, SerialPort.PARITY_NONE);
         sport.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
         sport.setRTS(false);
         sport.setDTR(false);

         InputStream is = sport.getInputStream();
         OutputStream os = sport.getOutputStream();

         os.write("RVM;".getBytes());
         Thread.sleep(100);
         byte[] response = new byte[16];
         is.read(response);
         System.out.println(new String(response, 0, 9));
         sport.close();
     }
}

On 04/28/2012 09:15 PM, Andy Eskelson wrote:
> It is highly unlikely that 38400 would not be supported, it's a standard
> bitrate.
>
> If in doubt, this can be tested via minicom which is a perfectly good
> terminal program. very basic, very like the old DOS procom terminal.
>
> If you have never run this before, run as root, that makes things
> easier. ctl-A Z O will get to the setup screen. then you can select
> device, and bitrates.
>
>
> If you want to run as a normal user, then if I remember correctly you
> need to run as root first, then save the config file in the users
> home directory. After that i6t will run as a nor5mal users (providing the
> user is a member of the correct groups. uucp, and dialout (depends on
> distro)
>
>
> Andy