[Gta04-owner] Second trial with QtMoko2

[Sven Dyroff]

Hello Nikolaus,

it would astonish me if you're right, but of course I'll then test it 
again in order to give you a chance to astonish me...    :-))

Best regards
   Sven
 




Von:    "H. Nikolaus Schaller" <hns at goldelico.com>
An:     List for communicating with real GTA04 owners 
<gta04-owner at goldelico.com>
Datum:  12.04.2018 14:25
Betreff:        Re: [Gta04-owner] Second trial with QtMoko2
Gesendet von:   "Gta04-owner" <gta04-owner-bounces at goldelico.com>



Hi Sven,

Am 12.04.2018 um 14:19 schrieb Sven Dyroff <S.Dyroff at phytec.de>:

Hello Nikolaus, 

fine, but this will "only" correct the swapping. It will still not correct 
the calibration. 

Whereat the comments of the affected source give a nice hint: "On my 
GTA04, sitting flat on the table, the raw Z acceleration value is about 
256, so we divide by 256 here." 

So I suggest to add a further printf of the value of "accel -> z", in 
order that your code will provide you the needed calibration data that you 
can then use for "accel -> [xyz]scale" in case of having detected a 
GTA04A5. 

It is easier than a printf: evtest /dev/input/accel reports the range 
[0..512] and the current values.

I have checked that and the GTA04A5 also reports roughly 256.

So I think you should test (after I have uploaded it to the server) if it 
is now ok for you.

BR,
Nikolaus


Best regards 
   Sven 
    




Von:        "H. Nikolaus Schaller" <hns at goldelico.com> 
An:        Sven Dyroff <S.Dyroff at phytec.de> 
Kopie:        List for communicating with real GTA04 owners <
gta04-owner at goldelico.com> 
Datum:        11.04.2018 19:21 
Betreff:        Re: [Gta04-owner] Second trial with QtMoko2 


Hi Sven, 

Am 05.04.2018 um 18:05 schrieb Sven Dyroff <S.Dyroff at phytec.de>: 

Hello Nikolaus, 

> I have now booted my GTA04A4 and the orientation is completely correct. 
> Hm. Maybe a subtle difference between GTA04A4 and A5? They use different 
accelerometer chips. 

something like that is what I already assumed. Would have wondered me if 
some scaling factors would have gone lost by just rebuilding QtMoko... 

I have now added a device version detection to swap the horizontal axis if 
we run on a GTA04A5: 

http://git.goldelico.com/?p=gta04-qtmoko.git;a=commit;h=04c30a3b18be8b55148427d6c63423837f6a77cc 


I have not yet published the new debian packages, but will do soon. So 
apt-get update will not 
yet find anything new. 

BR, 
Nikolaus 
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