APM 1280 upload problem

Hi guys, we are having some problems uploading firmware with Arduino to APM 1280 board when the size of the sketch is more than 122880 bytes (0x1E000).

I understand that bootloader starts at 0x1F000, so the maximum sketch size is 126976 bytes as Arduino shows.

What can be wrong? Tested on different boards and different computers. Arduino 0022 version.

Example:

Compiling:

Binary sketch size: 122904 bytes (of a 126976 byte maximum)

Uploading:

avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x1e000
         0xe1 != 0xff
avrdude: verification error; content mismatch

Thank you!!

 

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DeveloperPermalink Reply by Michael Oborne on May 26, 2011 at 4:11pm
when your uploading do you have servos/ecs attached?
Permalink Reply by Juampa on May 26, 2011 at 4:43pm
Nothing connected. Tried with USB only and external supply too. Less than 122880 bytes goes perfect, more than that gives the error.

DeveloperPermalink Reply by jasonshort on May 27, 2011 at 3:23pm

I've uploaded sketches a few hundred bytes shy to a 1280 without problems. Older versions of AC2 were 125k.

 

Permalink Reply by Juampa on May 27, 2011 at 3:35pm

Jason do you have any of the older versions with 125k? If so, please post the zip to give a try, I'm not sure if it is code related, I can't upload over 0x1E000.

 

Permalink Reply by Juampa on May 28, 2011 at 8:40am

I just added some lines to APM code to go over 122880 bytes, can you try to compile and upload this code?

Thank you

Attachments:
Permalink Reply by Juampa on May 30, 2011 at 4:26pm

I would really appreciate it if someone could try to upload the sketch and post the results.

Thanks!

Permalink Reply by Juampa on May 31, 2011 at 12:39pm

I tried to upload to Arduino Mega board with success, then I just found the problem, my APM boards came with fuses set wrong.

Boot flash start is wrong, preventing to write from 0x1E000 to 0x1EFFF.

Comparing to Arduino Mega fuses the brown out detection is wrong too.

I've set the fuses in APM board and now it's working.

Who know how many APM boards are out there with wrong fuses?

Take a look at BODLEVEL and BOOTSZ.

My APM boards fuses:

Arduino Mega fuses:


3D RoboticsPermalink Reply by Chris Anderson on May 31, 2011 at 2:21pm
Where did you get the APM boards from?
Permalink Reply by Juampa on May 31, 2011 at 3:52pm

From DIYDrones Store.

Right fuses should be as shown from Arduino Mega board?


3D RoboticsPermalink Reply by Chris Anderson on May 31, 2011 at 4:21pm
Gotcha. Thanks for the heads up. We're checking with QA to see what might have happened. We've had no other reports of this, so hopefully it's an isolated incident.
Permalink Reply by Juampa on May 31, 2011 at 4:35pm

Maybe it happened with a batch because I got several boards with same condition. Never noticed using sketches of less than 122880 bytes.

I will look for the date of purchase if it helps.

The fuses settings from Arduino Mega are fine for APM? I'm not sure what the settings should be in right condition.

 


3D RoboticsPermalink Reply by Chris Anderson on May 31, 2011 at 4:44pm
Date of purchase would be super helpful. The brown-out setting should be 2.7v as you say. We had a small batch with bad fuse settings last year, but there shouldn't have been any since then.

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