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