[Buildroot] Fwd: Qt4 Application - Touch detection

["Björn Kirchner" <bjoern@am-soft.de>]

Am Thu, 15 Jan 2015 14:01:14 -0600
schrieb Santhosh Ramani <srcoolz@gmail.com>:

> Hello Bjorn,
> 
> Thanks once again for your reply.
> 
> Does the capital 'T' in "Tslib" make any difference? I've only seen
> > it written as 't', yet. Do you reboot between calibration and
> > starting of your program? In my case the devices changed
> > occasionally between reboots, so /dev/input/event0 was not always
> > the correct device.
> 
> 
> I tried with both options, but the results are the same. In my case,
> it's always /dev/input/event0 so I think I'm okay here.
> 
> I'm not quite sure here. If you start a script which exports
> environment
> > variables, I think those exportes variables only exist in this
> > script and in its child processes. So, if you start ts_calibrate
> > with a start script and after that your program from a differnt
> > script or directly from your login shell, I suppose those variables
> > aren't set anymore. Please try to export them either in a start
> > script for your application or, as a quick test, in the shell you
> > use to start your program. Just to make sure...
> 
> 
> I tried exporting the variables from command line along with the
> scripts and also the method you suggested, but there was no change in
> operation. I was able to run the qt examples and once I exported the
> variables from command line those examples worked fine.

So, you did something like this?
# export TSLIB_TSDEVICE=/dev/input/event0
# export QWS_MOUSE_PROTO="tslib:/dev/input/event0"
# <qtExample>

And there the touch screen worked correctly? And your program didn't?

> 
> I'm going to try to compile my Qt application with the library built
> by buildroot and see if that helps. Do you have any other suggestions?
> 
> Thanks
> 
> - Santhosh