Thanks in Advance

If I use “export QWS_MOUSE_PROTO=tslib:/dev/input/ts” it shows “Segmentation fault”. When I replace this line by just “export QWS_MOUSE_PROTO=” (without :” the my “Hello World” shows perfectly, but no touch screen.

Compiling Qt with “-no-freetype” generates the same result: “Segmentation fault”.

I can’t find a way to work touch with my app.

Any suggestion?
Thank you.
Afonso.

Thanks a lot Cor. I have compiled my qt 4.6.3 and tslib successfully and loaded into mini2440 and run it from terminal by giving

./myapp -qws

It run successfully. Now I want to launch from the desktop by creating an icon and by clicking on it.

Please help me how to do it

Thanks for your work, it really helpfull for beginer as me

I am working with ubuntu 10.10 and I installed emdebian grip lenny on my mini2440.

I installed tslib, it seems to work well then I configure/make/make install Qt. Both I installed in the usr/local folder;

Then I cross-compiled a demo application “mousecalibration” and when I want to execute it : /lib/libc.so.6: version `GLIBC_2.9′ not found …

I didn’t compile Qt with “-static” but anyway I think it will be the same problem.

Do you have any issue ?

Thank you very much guys !!

Jeremy from France

thanks in advance
ketan patel

Thanks for the tutorial.
I got a problem tough: I tried everything out what you said, but my calibration still doesn’t work…
I only got that problem in Qt, out of Qt (while running a test) it works…
But in Qt I got 2 possibilities:
1. I don’t export: QWS_MOUSE_PROTO=tslib:/dev/input/ts
=> mouse isn’t moving the right way when touching the screen
2. I do export it => mouse is blocking when touching the screen, it even doesn’t move anymore…

can you plz help me out?

Thanks

I finally managed to make it work.
I tried A LOT of things but the linux kernel/distro that comes installed on the mini2440 is very wierd. Being a newbie, it’s been a lot of googling, trial and error but finally the solution is quite simple.

Everything is done in /etc/rcS.
To declare environment variables such as QWS_MOUSE_PROTO, you have to do it in two parts, first assing a value, and then export.
For instance:

QWS_MOUSE_PROTO=tslib:/dev/input/touchscreen0
export QWS_MOUSE_PROTO

When you have exported all the env. variables useful for Qt to work, then you can invoke your app.

Now when my device boots, my app is launched and the touchscreen works fine.

Again, thanks for your good walkthrough for installing Qt.

JF

I think that you may want to make a short script that set your variables and then launch the app.
For instance, something like that:

#!/bin/sh

export BLABLA = bla
exec myApp

A command like “source /etc/profile” might work too, I dunno.

Good luck, please post a feedback telling how you managed to make it work, I’m interested