Moderator Comment by Chris Anderson on February 27, 2009 at 8:11am

If your NMEA generator isn't putting out a fix data flag, you can bypass that in the code. Just set fix_position to 1 in the GPS tab.

Comment by Roberto on February 27, 2009 at 8:21am

Look here:

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1220054359/15
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1220054359

Arduino and MAX7456 OSD.. great add-on to ArduPilot.. :D

Comment by Michal on February 27, 2009 at 8:23am

There is a fix data flag inside the simulator code in $GPGGA sample:

$GPGLL,4115.1100,N,08148.9400,W,232118.18,A
$GPRMC,232118.18,A,4115.1100,N,08148.9400,W,40,0,2 60209,4.5,A
$GPGGA,232118.18,4115.1100,N,08148.9400,W,1,16,0.0 ,300,M,1.2,M,,0000

As far as I understand (I dont know anything about programming) the parser code $GPGGA is used for fix flag and altitude and $GPRMC for lat and lon?

Moderator Comment by Chris Anderson on February 27, 2009 at 10:26am

Correct. It's the 1 after the W in the example above. If your NMEA generator isn't sending the GGA string, ArduPilot won't work.

Comment by Nick Sargeant on March 8, 2009 at 5:30am

Did you have any luck using the USB to TTL adapter that remzibi ships with the OSD loading code to the Ardupilot? I cant get it to work...

Comment by Michal on March 8, 2009 at 7:47am

I cant get it to work too. Now I am waing for the new ArduPilot - after arrival I will try once more.

Comment by Michal on April 20, 2009 at 2:26pm

Now when I got ArduPilot working I will try to get rid of RF noise that comes from both OSD and ArduPilot. This is the only obstackle that prevent me from flying with both devices.
A few days ago my friend come with o'scope and we measured RF noise comming through power lines of ArduPilot. In the point where GPS should be connected there was really big RF mess. There was a noise from 11 to 14 kHz with 0.5V amplitude. When I try to connect OSD and AP together (via GPS sharing and current probe fro OSD) I can only go 3 meters away with antenna collapsed.

I will twist all wires apply suppressors (or chockers - I dont know the proper word) and try to make more separations between RC Rx and all other wires. Will try to update soon.
Regards
Michal
P.S. I believe you have found the right person - Remzibi. Hope my trials will be helpfull somehow :)

Moderator Comment by Paul Mather on June 29, 2009 at 8:14am

Michal, Remzibi is currently working on the ArduPilot interface for his OSD. I wrote the PC configuration software and the GPS Emulator. If there's anything you need changed or added, I'd be happy to help! I'll post my current GPS strings here in a moment. It appears I already have the fix flag set to 1.

Moderator Comment by Paul Mather on June 29, 2009 at 8:15am

Here is a sample output from my Emulator

$GPGLL,5000.0100,N,02000.0000,W,151456.300,A,*21
$GPRMC,151456.300,A,5000.0100,N,02000.0000,W,40,0,290609,003.1,W,*5D
$GPGGA,151456.300.000,5000.0100,N,02000.0000,W,1,9,0.0,300,M,1.2,M,,*6C

Moderator Comment by Paul Mather on June 29, 2009 at 8:17am

Also, some people have had trouble with uploading the HEX and BIN files from laptops. If you download the latest software (found here http://remzibi.happykillmore.com) you can use the "MegaLOAD" software to do the upload instead.

Comment

• ‹ Previous
• 1
• 2
• Next ›
• Page