Re: [Paparazzi-devel] Magnetometer freeze problem occurring AR Drone 2.0

[Oswald Berthold]

just tested that in flight. there was only one occasion for resetting
which seemed to go glitch-free. while flying, i didn't notice it at all.

the value 600 (3s) might actually be reduced significantly because even
a few ten identical values in a row are extremely unlikely, looking at
IMU_MAG_RAW on the plotter while the drone sits on the table.

mag-reset.png
Description: PNG image

mag-reset-shell.png
Description: PNG image

bst, opt

Gautier Hattenberger writes:

> Nice that we may have a solution for the freeze of the magnetometer.
> Out of curiosity, does anyone knows which sensor is used for mag on the 
> ardrone2 ?
>
> Gautier
>
> Le 05/06/2014 18:20, Oswald Berthold a écrit :
>> hi daren,
>>
>> very nice, i just tested your code in navdata.c and it seems to work.
>>
>> the MagFreezeCount needs to be reset in an else clause of
>>
>>     if (LastMagValue == navdata.mx)
>>
>> have you tested how the 20ms or so navdata dropout is reflected during
>> flight? need to rush now, can only try that next week.
>>
>> cheers, opt
>>
>>
>> opersupport writes:
>>
>>> I believe the problem might still occur on Paparazzi, considering that this
>>> has happened with the "toilet bowl" effect with one particular incident.
>>>
>>> http://lists.paparazziuav.org/Interesting-flight-with-ARDrone2-and-master-branch-td14499.html#a14679
>>>
>>> For resetting the nav board, I modified some code by hand and re-compiled,
>>> not with the Paparazzi source. I believe you can write something simple to
>>> reset it yourself. My logic looks something like this, it occurs inside the
>>> navigation update function
>>>
>>>     
>>>
>>>
>>> Use at your own risk, i've only tested on my custom code which works
>>> similarly to Paparazzi but is not set up exactly the same way
>>>
>>>
>>>
>>> --
>>> View this message in context: 
>>> http://lists.paparazziuav.org/Magnetometer-freeze-problem-occurring-AR-Drone-2-0-tp15283p15575.html
>>> Sent from the paparazzi-devel mailing list archive at Nabble.com.
>>>
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