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Re: [Paparazzi-devel] Tiny V2.11 GPS Configuration

From: Felix Ruess
Subject: Re: [Paparazzi-devel] Tiny V2.11 GPS Configuration
Date: Sat, 31 Mar 2012 19:20:55 +0200

Hi Bryan,

regarding programming of the Tiny: and
You normally only use the serial on DOWNLOAD to program the USB bootloader once (if you didn't already buy it with bootloader). To do that you need to hold BOOT low as explained in the wiki.
After that you normally just flash via USB (since you now flashed the USB bootloader).

You don't need to manually add that, just use the appropriate gps subsystem

regarding "set the tiny_2_1_1.h file"
you don't need to do that either... just select your board in the airframe file

If these two steps are still somewhere in the wiki, they are outdated... please correct them.

Cheers, Felix

On Fri, Mar 30, 2012 at 11:25 PM, Bryan Rogler <address@hidden> wrote:
Hey all,

First off I'd like to say thanks for everyone's quick responses to my last question about using an alternative GPS antenna. It turns out that the signal is relatively unaffected by my placement of it in the aircraft which is good news.

Recently I have been having a few issues with configuring the GPS on board of my Tiny 2.11 (is a LEA-5H-0-008) and have been through the wiki and a few external guides with no luck. I am successfully able to load the tunnel and communicate to the GPS receiver via the ublock software (Ubuntu 10.something) and am able to see the incoming binary messages and can get a GPS lock (lat, lon, altitude, etc.). However, when I try to change any of the settings (through the View->Messages) they do not seem to be saving. For example, when I try to change the baudrate in the Ports section of Config to 38400 and hit send, nothing seems to happen as the GPS still communicates through the 9600 default manufacturer baudrate (I have specified 38400 as the baud in my airframe file). I noticed that at this point I only have an option to change the baud on UART1 instead of USART1 which the wiki specifies. Also, I tried following the detailed instructions through the wiki, but the LEA-5H configuration file link seems to be broken, so I am trying to do the manual steps.

As a side note, I am connecting to the Tiny V2.11 with an FTDI cable with connections for ground, RX, and TX on the DOWNLOAD port of the board. I also have not been able to upload any new firmware onto the module. In fact, when I try to save a configuration file off of the GPS (GPS >> File) I only get timeouts in the window, which confuses me because it appears to be communicating correctly as I can get a GPS lock.

Also I have a question as to where to add the flag -DGPS_USE_LATLONG in the airframe file and also how to "set the tiny_2_1_1.h file." 

Any help or insight anyone might be able to provide would be greatly appreciated. If you need any other information please let me know and I can provide it. I have been turning my wheels on this issue for quite some time and can't think of where to go from here.



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