[Buildroot] Qt5 and touchscreen calibration

[Buildroot] Qt5 and touchscreen calibration

[David Picard]

Hello,


I got my touchscreen working perfectly with ts_test. Many thanks to 
Peter Seiderer !

But the thing is that my Qt5 app does not grab the touchscreen properly 
: x and y axis are switched. I did enable the tslib option under Qt5 in 
menuconfig. Is there some magic command line option to pass to the 
application ? I tried this :

$ myapp -platform linuxfb:fb=/dev/fb1 -plugin tslib
ts_open() failed (No such file or directory)

 >>> the app shows up, but TS still messed up.

My config :
- Raspberry Pi B+ and Adafruit 2.8" PiTFT w/ cap touch.
- Buildroot 2015.08.1
- Qt5 w/ tslib support enabled (BR2_PACKAGE_QT5BASE_TSLIB=y).


Regards,
David.

[Buildroot] Qt5 and touchscreen calibration

[Arnout Vandecappelle]

On 30-10-15 17:55, David Picard wrote:
> Hello,
> 
> 
> I got my touchscreen working perfectly with ts_test. Many thanks to Peter
> Seiderer !
> 
> But the thing is that my Qt5 app does not grab the touchscreen properly : x and
> y axis are switched. I did enable the tslib option under Qt5 in menuconfig. Is
> there some magic command line option to pass to the application ? I tried this :
> 
> $ myapp -platform linuxfb:fb=/dev/fb1 -plugin tslib
> ts_open() failed (No such file or directory)

 Did you export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event0 (but
replace with the correct device of course)?

 Or hang on, for tslib it's TSLIB_TSDEVICE that you have to set.


 Regards,
 Arnout

> 
>>>> the app shows up, but TS still messed up.
> 
> My config :
> - Raspberry Pi B+ and Adafruit 2.8" PiTFT w/ cap touch.
> - Buildroot 2015.08.1
> - Qt5 w/ tslib support enabled (BR2_PACKAGE_QT5BASE_TSLIB=y).
> 
> 
> Regards,
> David.
> 
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
> 


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

[Buildroot] Qt5 and touchscreen calibration

[Peter Seiderer]

Hello David, Arnout,

On Fri, 30 Oct 2015 18:23:02 +0100, Arnout Vandecappelle <arnout@mind.be> wrote:

> On 30-10-15 17:55, David Picard wrote:
> > Hello,
> > 
> > 
> > I got my touchscreen working perfectly with ts_test. Many thanks to Peter
> > Seiderer !
> > 
> > But the thing is that my Qt5 app does not grab the touchscreen properly : x and
> > y axis are switched. I did enable the tslib option under Qt5 in menuconfig. Is

The following 

	$ QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS='rotate=270' /usr/lib/qt/examples/touch/fingerpaint/fingerpaint -platform 
linuxfb:fb=/dev/fb1

worked for me to get x/y right, see [1] for Qt5 parameters.

Regards,
Peter

[1] http://doc.qt.io/qt-5/embedded-linux.html

> > there some magic command line option to pass to the application ? I tried this :
> > 
> > $ myapp -platform linuxfb:fb=/dev/fb1 -plugin tslib
> > ts_open() failed (No such file or directory)
> 
>  Did you export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event0 (but
> replace with the correct device of course)?
> 
>  Or hang on, for tslib it's TSLIB_TSDEVICE that you have to set.
> 
> 
>  Regards,
>  Arnout
> 
> > 
> >>>> the app shows up, but TS still messed up.
> > 
> > My config :
> > - Raspberry Pi B+ and Adafruit 2.8" PiTFT w/ cap touch.
> > - Buildroot 2015.08.1
> > - Qt5 w/ tslib support enabled (BR2_PACKAGE_QT5BASE_TSLIB=y).
> > 
> > 
> > Regards,
> > David.
> > 
> > 
> > _______________________________________________
> > buildroot mailing list
> > buildroot at busybox.net
> > http://lists.busybox.net/mailman/listinfo/buildroot
> > 
> 
> 

[Buildroot] Qt5 and touchscreen calibration

[David Picard]

Hello,

The 'rotate' trick did it.

Thanks,
David.

Le 30/10/2015 21:12, Peter Seiderer a ?crit :
> Hello David, Arnout,
>
> On Fri, 30 Oct 2015 18:23:02 +0100, Arnout Vandecappelle <arnout@mind.be> wrote:
>
>> On 30-10-15 17:55, David Picard wrote:
>>> Hello,
>>>
>>>
>>> I got my touchscreen working perfectly with ts_test. Many thanks to Peter
>>> Seiderer !
>>>
>>> But the thing is that my Qt5 app does not grab the touchscreen properly : x and
>>> y axis are switched. I did enable the tslib option under Qt5 in menuconfig. Is
>
> The following
>
> 	$ QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS='rotate=270' /usr/lib/qt/examples/touch/fingerpaint/fingerpaint -platform
> linuxfb:fb=/dev/fb1
>
> worked for me to get x/y right, see [1] for Qt5 parameters.
>
> Regards,
> Peter
>
> [1] http://doc.qt.io/qt-5/embedded-linux.html
>
>>> there some magic command line option to pass to the application ? I tried this :
>>>
>>> $ myapp -platform linuxfb:fb=/dev/fb1 -plugin tslib
>>> ts_open() failed (No such file or directory)
>>
>>   Did you export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event0 (but
>> replace with the correct device of course)?
>>
>>   Or hang on, for tslib it's TSLIB_TSDEVICE that you have to set.
>>
>>
>>   Regards,
>>   Arnout
>>
>>>
>>>>>> the app shows up, but TS still messed up.
>>>
>>> My config :
>>> - Raspberry Pi B+ and Adafruit 2.8" PiTFT w/ cap touch.
>>> - Buildroot 2015.08.1
>>> - Qt5 w/ tslib support enabled (BR2_PACKAGE_QT5BASE_TSLIB=y).
>>>
>>>
>>> Regards,
>>> David.
>>>
>>>
>>> _______________________________________________
>>> buildroot mailing list
>>> buildroot at busybox.net
>>> http://lists.busybox.net/mailman/listinfo/buildroot
>>>
>>
>>
>