ciao a tutti scusate se mi ripeto (vedi oggetto) ma il programma cui troverete il codice sotto non mi termina per quale oscuro seppur banale motivo?
il codice tratta la comunicazione con un modem collegato alla porta seriale utilizzando le java comm il codice č lungo ma consolatevi con il fatto che potete usarlo dato che funziona( che consolazione?!)
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.TooManyListenersException;
import javax.comm.*;
/**
* Simple program to read characters from the command-line, send
* them to the specified serial port, and echo any characters
returned.
* Modeled after the SimpleRead and SimpleWrite sample programs
included
* with the Java Communications API distribution.
*/
public class SimpleWrite1 implements Runnable,
SerialPortEventListener {
static String DEFAULT_PORT = "COM4";
InputStream in;
OutputStream out;
private String message = "AT\r";
private Object readerThread;
public void writeToCommPort(String message) {
this.message = message;
Thread readerThread;
}
/**
* Main method.
*/
public static void main(String[] args) {
String portname = DEFAULT_PORT;
if (args.length > 1) {
System.err.println("Usage: java SimpleReadWrite [port_name]");
System.exit(1);
}
else if (args.length == 1) {
portname = args[0];
}
try {
CommPortIdentifier portId =
CommPortIdentifier.getPortIdentifier(portname);
if (portId.getPortType() ==
CommPortIdentifier.PORT_SERIAL) {
SimpleReadWrite1 srw = new SimpleReadWrite1(portId);
}
else {
System.err.println(portname + " is not a serial port");
System.exit(1);
}
}
catch (NoSuchPortException e) { //Port nicht vorhanden
System.err.println("No such port: " + portname);
System.exit(1);
}
catch (PortInUseException e) { //Port ist gesperrt/inGebrauch
System.err.println("Port in use: " + portname);
System.exit(1);
}
}
/**
* Constructor.
*/
public SimpleWrite1(CommPortIdentifier portId) throws
PortInUseException {
try {
SerialPort serialPort = (SerialPort)
portId.open("SimpleReadWrite",
2000);
//Port mit
in = serialPort.getInputStream();
out = serialPort.getOutputStream();
serialPort.addEventListener(this);
serialPort.notifyOnDataAvailable(true);
serialPort.setSerialPortParams(9600, //Schnittstelleneinstellungen initialisieren
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
Thread readerThread = new Thread(this);
readerThread.start();
} //Exception-Handling
catch (IOException e) {
System.err.println("Problem opening streams");
System.exit(1);
}
catch (TooManyListenersException e) {
System.err.println("Too Many Listeners");
System.exit(1);
}
catch (UnsupportedCommOperationException e) {
System.err.println("Problem setting port parameters");
System.exit(1);
}
}
/**
* This method loops forever, reading data from the
* command line and writing it directly to the serial port.
* No buffering is performed.
*/
public void run() {
try {
out.write(message.getBytes());
}
catch (IOException e) {
// Terminate thread
}
}
/**
* Process serial port events. This method is required
* when implementing SerialPortEventListener
*
* @param event SerialPortEvent object to process
*/
public void serialEvent(SerialPortEvent event) {
switch (event.getEventType()) {
case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
// If there is data available on serial port,
// read it in in chunks <=20 bytes
//
byte[] readBuffer = new byte[1];
try {String l;
while (in.available() >0 && (in.read())!=0) {
int numBytes = in.read(readBuffer);
in.close();
}
System.out.write(readBuffer);
}
catch (IOException e) {
// Terminate handling this event on read error
}
break;
default:
System.out.print("Unknown SerialPortEvent type = " +
event.getEventType());
break;
}
}
}
ciao e grazie
