COMMAPI freeing serial port

Question

I have a question about Java commapi and serial ports. In my application I call close on a SerialPort object and associated input/outputstreams. Later on I try to open the port again by calling open on a CommPortIdentifier object and I get a RuntimeException with message "Device busy". If I close the application and start it again, the serial port is opened without problems. My question is should I do something more when closing the port to free it?
Code that tries to close the port:
inStream.close(); //inputstream
outStream.close(); //outputstream
inStream=null;
outStream=null;
port.close(); //SerialPort
port.removeEventListener();
port=null;My platform is Sparc Solaris 10.
Thanking you in advance,
Anguinus

Answer 1

I know this is a very old post, but google came up with it after searching for ttyUSB0 and java, so I thought I'd chip in the solution so that other people arriving here might benefit :)
The trick is to go into javax.comm.properties and add the ttyUSB0 to the list of serial ports:
# Implementation specific driver
driver=com.sun.comm.LinuxDriver
# Paths to server-side serial port devices
serpath0 = /dev/ttyS0
serpath1 = /dev/ttyS1
serpath2 = /dev/ttyUSB0               # <--- added ttyUSB0
# Paths to server-side parallel port devices
parpath0 = /dev/parport0
parpath1 = /dev/parport1Works fine for me