Mega Code Archive
Read from multiple Serial ports, notifying when data arrives on any
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/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import java.util.logging.Logger;
import javax.comm.CommPortIdentifier;
import javax.comm.NoSuchPortException;
import javax.comm.PortInUseException;
import javax.comm.SerialPort;
import javax.comm.SerialPortEvent;
import javax.comm.SerialPortEventListener;
import javax.comm.UnsupportedCommOperationException;
/**
* Read from multiple Serial ports, notifying when data arrives on any.
*
* @version $Id: SerialLogger.java,v 1.4 2004/03/11 04:09:14 ian Exp $
* @author Ian F. Darwin, http://www.darwinsys.com/
*/
public class SerialLogger {
public static void main(String[] argv) throws IOException,
NoSuchPortException, PortInUseException,
UnsupportedCommOperationException {
new SerialLogger();
}
/* Constructor */
public SerialLogger() throws IOException, NoSuchPortException,
PortInUseException, UnsupportedCommOperationException {
// get list of ports available on this particular computer,
// by calling static method in CommPortIdentifier.
Enumeration pList = CommPortIdentifier.getPortIdentifiers();
// Process the list, processing only serial ports.
while (pList.hasMoreElements()) {
CommPortIdentifier cpi = (CommPortIdentifier) pList.nextElement();
String name = cpi.getName();
System.out.print("Port " + name + " ");
if (cpi.getPortType() == CommPortIdentifier.PORT_SERIAL) {
System.out.println("is a Serial Port: " + cpi);
SerialPort thePort;
try {
thePort = (SerialPort) cpi.open("Logger", 1000);
} catch (PortInUseException ev) {
System.err.println("Port in use: " + name);
continue;
}
// Tell the Comm API that we want serial events.
thePort.notifyOnDataAvailable(true);
try {
thePort
.addEventListener(new Logger(cpi.getName(), thePort));
} catch (TooManyListenersException ev) {
// "CantHappen" error
System.err.println("Too many listeners(!) " + ev);
System.exit(0);
}
}
}
}
/** Handle one port. */
public class Logger implements SerialPortEventListener {
String portName;
SerialPort thePort;
BufferedReader ifile;
public Logger(String name, SerialPort port) throws IOException {
portName = name;
thePort = port;
// Make a reader for the input file.
ifile = new BufferedReader(new InputStreamReader(thePort
.getInputStream()));
}
public void serialEvent(SerialPortEvent ev) {
String line;
try {
line = ifile.readLine();
if (line == null) {
System.out.println("EOF on serial port.");
System.exit(0);
}
System.out.println(portName + ": " + line);
} catch (IOException ex) {
System.err.println("IO Error " + ex);
}
}
}
}
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