import java.io.*;
import javax.comm.*;
import java.util.*;
/**
* Read from multiple Serial ports, notifying when data arrives on any.
* @version $Id: SerialLogger.java,v 1.2 2000/11/25 17:55:36 ian Exp $
* @author Ian F. Darwin, ian@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, putting serial and parallel into ComboBoxes
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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