Help using my gps with javelin

claym53

I bought a javelin chip (http://www.parallax.com/detail.asp?product_id=JS1-IC), a mini-ABB board to put it on (http://www.lynxmotion.com/Category.aspx?CategoryID=66) and a gps module from parallax (http://www.parallax.com/detail.asp?product_id=28146).

I'm trying to read in the gps coordinates so I can work with them in my java program. From what I've read of the gps documentation and the javelin manual, I think I need to use the Uart VP to send the·hex codes to the gps module and then recieve what·comes back.

So if someone could get me started with some·code, I would be very gratefull.

Please help A.S.A.P!

Peter Verkaik

This should give you a start.

regards peter

Post Edited (Peter Verkaik) : 12/8/2006 9:16:41 AM GMT

claym53

I dont have the GPS package (package stamp.peripheral.gps) to run it and I don't know where to get it... I even looked in the yahoo groups. So if someone could post it for me, that would be great [noparse]:)[/noparse]

Peter Verkaik

Just create a folder ...../lib/stamp/peripheral/gps/
and put the attachement from above post in it.

In your application prgram put

import stamp.peripheral.gps.*;
import stamp.core.*;

static Uart sio = new Uart(Uart.dirReceive,CPU.pin0,Uart.dontInvert,Uart.speed4800,Uart.stop1);
static GPS_Parallax mygps = new GPS_Parallax(sio,0);

then you can use mygps.getValid() and other public methods from class GPS_Parallax.

regards peter

claym53

I'm getting this error: No match was found for constructor "GPS_Parallax(stamp.core.Uart,int)"

Peter Verkaik

The attachement is an example application
that compiles ok.
Put it in the projects folder.

regards peter

claym53

I seem to be getting the same error: No match was found for constructor "GPS_Parallax(stamp.core.Uart,int)"...

any ideas?

Peter Verkaik

If you installed the Javelin IDE into its default folder,
then you must have a folder
c:\Program Files\Parallax Inc\Javelin Stamp IDE\lib\stamp\peripheral\gps\
in which you place GPS_Parallax.java
and a folder
c:\Program Files\Parallax Inc\Javelin Stamp IDE\Projects\
in which you place gps_test.java

Use capital and small print letters EXACTLY as above.

The error you get suggests there is no Uart.java class
in folder ...\lib\stamp\core\
If it is not there, I suggest you reinstall the Javelin IDE program.

regards peter

claym53

ok, it seems that the mygps.getValid works, but I can use getLat or getLong because they are void and don't return anything.... So how do I get the lat and long?

Peter Verkaik

In the GPS_Parallax class I have defined

· //public results for fast access (read only)
· public int hours,minutes,seconds;
· public int day,month,year;
· public int latDegrees,latMinutes,latFracmin,latDirection;
· public int lngDegrees,lngMinutes,lngFracmin,lngDirection;

You can access these values using mygps.hours etc.
I could have defined methods that return those values
but that would only take additional·codespace.
Just don't assign values·to these variables.

regards peter