183 lines
3.6 KiB
Java
183 lines
3.6 KiB
Java
package altimeter;
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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.util.ArrayList;
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import java.util.Enumeration;
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/**
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* Class to interface the PerfectFlite Alt15K/WD altimeter.
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*
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* Also includes a main method that retrieves all flight profiles and saves them to files.
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*
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* @author Sampo Niskanen <sampo.niskanen@iki.fi>
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*/
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public class SerialDownload {
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private static final boolean DEBUG = false;
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private static final int MAGIC = 666;
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private final CommPortIdentifier portID;
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private SerialPort port = null;
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private InputStream is = null;
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public static String[] getNames() {
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ArrayList<String> list = new ArrayList<String>();;
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Enumeration<?> pids = CommPortIdentifier.getPortIdentifiers();
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while (pids.hasMoreElements()) {
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CommPortIdentifier pid = (CommPortIdentifier) pids.nextElement();
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if (pid.getPortType() == CommPortIdentifier.PORT_SERIAL)
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list.add(pid.getName());
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}
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return list.toArray(new String[0]);
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}
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public SerialDownload(String name) throws IOException {
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CommPortIdentifier myPortID = null;
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Enumeration<?> portIdentifiers = CommPortIdentifier.getPortIdentifiers();
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while (portIdentifiers.hasMoreElements()) {
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CommPortIdentifier pid = (CommPortIdentifier) portIdentifiers.nextElement();
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if(pid.getPortType() == CommPortIdentifier.PORT_SERIAL &&
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pid.getName().equals(name)) {
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myPortID = pid;
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break;
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}
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}
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if (myPortID == null) {
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throw new IOException("Port '"+name+"' not found.");
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}
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this.portID = myPortID ;
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}
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public void readData() throws IOException, PortInUseException {
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long t0 = -1;
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long t;
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int previous = MAGIC;
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try {
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open();
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System.err.println("Ready to read...");
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while (true) {
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int c = is.read();
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t = System.nanoTime();
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if (t0 < 0)
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t0 = t;
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System.out.printf("%10.6f %d\n", ((double)t-t0)/1000000000.0, c);
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if (previous == MAGIC) {
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previous = c;
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} else {
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System.out.printf("# Altitude: %5d\n", previous*256 + c);
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previous = MAGIC;
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}
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if (c < 0)
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break;
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}
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} catch (UnsupportedCommOperationException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} finally {
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close();
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}
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}
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private void open() throws PortInUseException, IOException,
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UnsupportedCommOperationException {
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if (port != null) {
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System.err.println("ERROR: open() called with port="+port);
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Thread.dumpStack();
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close();
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}
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if (DEBUG) {
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System.err.println(" Opening port...");
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}
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port = (SerialPort)portID.open("OpenRocket",1000);
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port.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
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SerialPort.PARITY_NONE);
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port.setInputBufferSize(1);
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port.setOutputBufferSize(1);
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is = port.getInputStream();
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}
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private void close() {
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if (DEBUG)
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System.err.println(" Closing port");
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SerialPort p = port;
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port = null;
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is = null;
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if (p != null)
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p.close();
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}
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public static void main(String[] arg) throws Exception {
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String device = null;
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String[] devices = SerialDownload.getNames();
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for (int i=0; i<devices.length; i++) {
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if (devices[i].matches(".*USB.*")) {
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device = devices[i];
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break;
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}
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}
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if (device == null) {
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System.err.println("Device not found.");
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return;
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}
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System.err.println("Selected device "+device);
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SerialDownload p = new SerialDownload(device);
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p.readData();
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}
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}
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