svn-gvsig-desktop / trunk / extensions / extGPS / src / org / gvsig / gps / GPSDriver.java @ 4749
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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/* CVS MESSAGES:
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*
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* $Id: GPSDriver.java 4749 2006-04-05 17:08:18Z jaume $
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* $Log$
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* Revision 1.1 2006-04-05 17:08:18 jaume
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* *** empty log message ***
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*
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* Revision 1.2 2006/04/03 21:07:35 jaume
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* *** empty log message ***
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*
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* Revision 1.1 2006/04/03 16:10:27 jaume
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* *** empty log message ***
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*
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* Revision 1.1 2006/03/31 09:55:34 jaume
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* *** empty log message ***
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*
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*
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*/
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package org.gvsig.gps; |
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import gnu.io.CommPortIdentifier; |
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import gnu.io.PortInUseException; |
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import gnu.io.SerialPort; |
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import gnu.io.UnsupportedCommOperationException; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.util.ArrayList; |
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import java.util.Enumeration; |
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import java.util.Hashtable; |
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import java.util.Iterator; |
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import org.gvsig.gps.listeners.GPSEventListener; |
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import org.gvsig.gps.parser.NMEA.GGASentence; |
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import org.gvsig.gps.parser.NMEA.IllegalSentenceException; |
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import org.gvsig.gps.parser.NMEA.NMEASentence; |
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import org.gvsig.gps.parser.NMEA.NMEASentenceFactory; |
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import org.gvsig.gps.parser.NMEA.RMCSentence; |
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import org.gvsig.gps.parser.NMEA.VTGSentence; |
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public class GPSDriver extends Thread { |
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private ArrayList eventListeners = new ArrayList(); |
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// The timeOut field specifies how long a value received from the device
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// is valid. After this time, no more events of the corresponding class
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// will be fired.
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private static final long timeOut = 60 * 1000; // 60 seconds. |
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private SerialPort serialPort = null; |
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private InputStream inputStream; |
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private OutputStream outputStream; |
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private Hashtable register = new Hashtable(); |
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private int rate = 1000; |
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private long lastSampleTime; |
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private boolean eventsEnabled; |
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private static GPSDriver instance = null; |
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private GPSDriver() {};
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public static GPSDriver getInstance() { |
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if (instance == null) |
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instance = new GPSDriver();
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return instance;
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} |
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public void setPort(CommPortIdentifier portID, int portSpeed) throws PortInUseException{ |
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closePort(); |
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serialPort = (SerialPort) portID.open("gvSIG", portSpeed);
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try {
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inputStream = serialPort.getInputStream(); |
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outputStream = serialPort.getOutputStream(); |
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serialPort.setSerialPortParams( |
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portSpeed, |
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SerialPort.DATABITS_8, |
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SerialPort.STOPBITS_1, |
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SerialPort.PARITY_NONE |
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); |
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} catch (UnsupportedCommOperationException e) {
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e.printStackTrace(); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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} |
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/**
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* Tells the driver to start monitoring and capturing data from the device.
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*/
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public void start() { |
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eventsEnabled = true;
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if (!this.isAlive()) |
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super.start();
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} |
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public void run() { |
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byte[] readBuffer = new byte[2048]; |
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StringBuffer line = new StringBuffer(); |
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try {
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for (int bytes = inputStream.read(readBuffer); bytes>-1; bytes = inputStream.read(readBuffer)){ |
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// Creates a new buffer to contain the previous readed bytes and the next bunch of bytes
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String str = new String(readBuffer).substring(0, bytes); |
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int i = str.indexOf("\n"); |
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if (i == -1) { |
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line.append(str); |
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} else {
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line.append(str.substring(0,i));
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analyzeMessage(line.toString()); |
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line = new StringBuffer(); |
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line.append(str.substring(i+1,str.length()));
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} |
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} |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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try {
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System.err.println("Sending request"); |
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outputStream.write(new String("$PMCAG,005,1,GGA,001").getBytes()); |
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for (int bytes = inputStream.read(readBuffer); bytes>-1; bytes = inputStream.read(readBuffer)){ |
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// Creates a new buffer to contain the previous readed bytes and the next bunch of bytes
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String str = new String(readBuffer).substring(0, bytes); |
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int i = str.indexOf("\n"); |
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if (i == -1) { |
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line.append(str); |
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} else {
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line.append(str.substring(0,i));
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analyzeMessage(line.toString()); |
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try {
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sleep(rate); |
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} catch (InterruptedException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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line = new StringBuffer(); |
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line.append(str.substring(i+1,str.length()));
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} |
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} |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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} |
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private void analyzeMessage(String line) { |
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try {
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NMEASentence data = NMEASentenceFactory.createFromString(line); |
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NMEASentence oldData = (NMEASentence) register.get(data.getName()); |
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boolean mustNotifyListeners = !data.isEquivalentTo(oldData);
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register.put(data.getName(), data); |
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//if (mustNotifyListeners)
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fireEvents(); |
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} catch (IllegalSentenceException e) {
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// if (eventsEnabled && line!=null)
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// NotificationManager.addWarning("Unrecognized sentence: "+line, null);
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} |
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} |
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public void setSampleRate(int millis) { |
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this.rate = millis;
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} |
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public void addEventListener(GPSEventListener l) { |
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eventListeners.add(l); |
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} |
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private void fireEvents() { |
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Iterator it = eventListeners.iterator();
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while (eventsEnabled && it.hasNext()) {
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GPSEventListener l = (GPSEventListener) it.next(); |
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if (System.currentTimeMillis() - lastSampleTime >= rate ) { |
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Iterator i = register.keySet().iterator();
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while (i.hasNext()) {
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NMEASentence aux = (NMEASentence) register.get(i.next()); |
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if (isCurrent(aux)) {
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// This is a valid record
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if (aux instanceof GGASentence) { |
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GGASentence s = (GGASentence) aux; |
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l.newLonLatPositionReceived(s.getLongitude(), s.getLatitude()); |
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} else if (aux instanceof RMCSentence) { |
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// TODO
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l.unhandledMessage(aux.toString()); |
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} else if (aux instanceof VTGSentence) { |
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VTGSentence s = (VTGSentence) aux; |
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l.speedChanged(s.getSpeed(), s.getCourse()); |
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} else {
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l.unhandledMessage(aux.toString()); |
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} |
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} else {
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// This record is too old.
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register.remove(aux); |
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} |
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} |
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lastSampleTime = System.currentTimeMillis();
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} |
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} |
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} |
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private boolean isCurrent(NMEASentence n) { |
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return System.currentTimeMillis() - n.getTime() < timeOut; |
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} |
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/**
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* Silences the event firing. To resume the event firing just call <b>start()</b> method.
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*/
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public void silence() { |
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eventsEnabled = false;
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} |
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public static void main(String[] args) { |
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if (args.length < 1) { |
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System.out.print("GPSReader port\n"); |
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System.exit(-1); |
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} |
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Enumeration portList = CommPortIdentifier.getPortIdentifiers();
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while (portList.hasMoreElements()) {
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CommPortIdentifier myPortId = (CommPortIdentifier) portList.nextElement(); |
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if (myPortId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
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if (myPortId.getName().equals(args[0])) { |
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try {
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GPSDriver reader = GPSDriver.getInstance(); |
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reader.setPort(myPortId, 4800);
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reader.setSampleRate(100);
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reader.addEventListener(new GPSEventListener() {
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public void unhandledMessage(String msg) { |
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System.out.println("UNHANDLED: "+msg); |
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} |
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public void connectionLost() { |
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System.out.println("CONNECTION LOST"); |
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} |
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public void connectionEstablished() { |
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System.out.println("CONNECTION ESTABLISHED"); |
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} |
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public void newLonLatPositionReceived(double lon, double lat) { |
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System.out.println("NEW LONLAT POSITION RECEIVED: ("+lon+", "+lat+")"); |
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} |
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public void signalLevelChanged(float level) { |
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System.out.println("NEW SIGNAL LEVEL: "+level); |
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} |
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public void speedChanged(float speed, short course) { |
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System.out.println("SPEED/COURSE CHANGED: ( "+speed+" Km/h, "+course+" degrees)"); |
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} |
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public void estimatedPosErrorChanged(double f) { |
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} |
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public void heightChanged() { |
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} |
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}); |
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reader.start(); |
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} catch (PortInUseException e) {
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System.err.println("Port busy"); |
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} |
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} |
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} |
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} |
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} |
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public void closePort() { |
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if (serialPort != null) { |
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serialPort.notifyOnDataAvailable(false);
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serialPort.removeEventListener(); |
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if (inputStream != null) { |
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try {
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inputStream.close(); |
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inputStream = null;
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} |
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catch (IOException e) {} |
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} |
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if (outputStream != null) { |
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try {
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outputStream.close(); |
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outputStream = null;
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} |
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catch (IOException e) {} |
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} |
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serialPort.close(); |
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serialPort = null;
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} |
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} |
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} |