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Re: [Paparazzi-devel] Home mode on takeoff


From: Joseph Muhlhausen
Subject: Re: [Paparazzi-devel] Home mode on takeoff
Date: Wed, 10 Jun 2015 10:20:33 -0400

OK I figured it out. 

The frame rate drop is from the radio frames dropping because of a weak signal. The MCU follows because I am assuming there is less to compute.

I am swapping for another radio and see if it will make any difference.

On Tue, Jun 9, 2015 at 11:21 AM, Joseph Muhlhausen <address@hidden> wrote:
Hi Felix,

Thanks!

I looked more carefully at my logs, and it look like MCU1_STATUS and FRAME_RATE drop on take off (see screenshots). 
Inline image 2
What are MCU1_STATUS and FRAME_RATE? 
Is this a normal behavior? If not can the issue be software related?

Thanks,
Joseph


On Mon, Jun 8, 2015 at 6:20 PM, Felix Ruess <address@hidden> wrote:
Hi Joseph,

in AUTO1 it only switches to HOME mode if RC_REALLY_LOST (which happens after RC_REALLY_LOST_TIME, so ~1s).

Regarding switching to a newer version if you have changes, it is usually best/easiest if you start a new personal branch based on the version you want to use and re-apply your changes on top of that...

Cheers, Felix

On Mon, Jun 8, 2015 at 9:41 PM, Joseph Muhlhausen <address@hidden> wrote:
Hi Felix,


Ah I forgot to attach the data file sorry about that! Although if messages come at different rates it is probably my radio signal that got lost for a split second. Is there anyway to add a 1s delay before switching to HOME mode?

About updating to 5.4. When I do a git pull from my branch I get a lot of conflicts that need to be manually resolved. Do I need to checkout branch v5.4 and then make changes to it myself?

Thanks,
Joseph

On Sun, Jun 7, 2015 at 9:48 AM, Felix Ruess <address@hidden> wrote:
Hi Joseph,


Regarding the log: without the .data file that contains the actual logged data, the .log file is not really of much use...

Since not all messages come at the same rate, it can sometimes look like the the events have different order at first glance.
e.g. consider the following:
- everything ok
- send current rc status in FBW_STATUS message
- you loose RC and go to HOME mode
- send PPRZ_MODE message that says you are in home mode
- send FBW_STATUS message again that shows that you lost RC


On a sidenote: I also recommend to upgrade to the latest stable version (currently v5.4.2)

Cheers, Felix

On Mon, Jun 1, 2015 at 12:51 AM, Joseph Muhlhausen <address@hidden> wrote:
Hi all,

On my last flight my autopilot switched to HOME mode during takeoff. I usually toss the plane in AUTO1 and immediately switch to AUTO2. The plane seems to have lost radio signal for a split second but when I look at the log it looks like the HOME mode was triggered before that. Attached are the logs and flight plan. I am using version 5.0.1

I can't figure out why the plane switched to HOME mode... Has this happened to anyone?

Thanks,
Joseph



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