Helping in calibrating etp-4500ug for working in RPI3

[SGaist]

Hi and welcome to devnet,

As silly as it may sound, run ts_calibrate through a debugger to see what's going wrong.

[tictactoe]

Hi and Thanks you for reply
I connect to raspberry through ssh and run ts_calibrate and get the "Segmentation fault" message .
Recently I use below variable for TSLIB

 export LD_LIBRARY_PATH=/usr/local/qt5pi/lib
 export PATH=/usr/local/qt5pi/bin:$PATH
# hides mouse cursor
 export QT_QPA_EGLFS_HIDECURSOR=1
 # enables tslib plugin for touch screen
 export QT_QPA_GENERIC_PLUGINS=Tslib
 # disables evdev mouse input (to avoid getting duplicated input from tslib AND evdev)
 export QT_QPA_EGLFS_DISABLE_INPUT=1
 
 export TSLIB_FBDEVICE=/dev/fb0
 export TSLIB_CONSOLEDEVICE=none
 export TSLIB_TSDEVICE=/dev/input/by-id/`ls /dev/input/by-id/ | grep "eGalax"`
 export TSLIB_CONFFILE=/etc/ts.conf
 export TSLIB_CALIBFILE=/etc/pointercal
 export TSLIB_PLUGINDIR=/usr/lib/arm-linux-gnueabihf/ts0

But with the same error "Segmentation fault" ...

Regards,
tictactoe

[SGaist]

Like I wrote before, run it through the debugger. You can install gdb on your Pi.

[tictactoe]

I install QT5.7 on ubuntu on vmware and cross compile it to the Pi and I can debug my program through it. Do you mean this?

[tictactoe]

I got what you say . But is a new project for me :-)
I want to solve this problem easier than this.

[jsulm]

@tictactoe If you really do not want to use a debugger (this is actually something a programmer should learn) you can add qDebug() << "..." to your code at the places where you think the problem occurs. This can help to find out where the crash happens. But it isn't really easier than just using a debugger, which isn't rocket science.

[tictactoe]

I dont have any problem during on the running of my program . The only problem is the swapping the axes of X,Y of the touch controller.
I want to solve it

[tictactoe]

finally I cant run ts_calibrate and save calibration point in the /etc/pointercal .
The below list is the last updated of environment variable for tslib and eglfs

export QT_QPA_PLATFORM=eglfs
export QT_QPA_EGLFS_TSLIB=1
export QT_QPA_FB_DISABLE_INPUT=1
export QT_QPA_EGLFS_TOUCHSCREEN_PARAMETERS=/dev/input/event0:invertx=1
export TSLIB_FBDEVICE=/dev/fb0
export TSLIB_CONSOLEDEVICE=/dev/tty
export TSLIB_TSDEVICE=/dev/input/by-id/ls /dev/input/by-id/ | grep "eGalax"
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_PLUGINDIR=/usr/local/lib/ts

I dont know about the "QT_QPA_GENERIC_PLUGINS" variable.
I have a problem of inverting the X axis in my QT program that run on RPI3 yet
how can I solve this?

Regards,
tictactoe

[tictactoe]

@SGaist
Hi
I want to install gdb on RPI as you said before.
I want to use the below link for installing gdb on rpi and ubuntu. Is it correct ?

link text

Regards

[SGaist]

Does look good yes

[tictactoe]

I dont know how to debug my qt program with gdb. Can you give me link for this?

[SGaist]

It's the same as any other program. Note that you can remote debug from Qt Creator. It's explained in the Launching the Debugger chapter of Qt Creator's documentation.