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+--- Thread: eGalax touchscreen calibration (/thread-832.html)
RE: eGalax touchscreen calibration - brantje - 7th Jun, 2013 02:36 AM
Correct
Code:
calib_x_d=1280;calib_x_fact= -0.66667;calib_y_d=720;calib_y_fact=-0.666667;swap_axes=1;RE: eGalax touchscreen calibration - Markamc - 7th Jun, 2013 03:47 AM
Ok, so you cannot see the pointer when using the touchscreen, and it has no effect on the reported pointer value when touching the screen.
So at max x-pos., the equation gives: 1280 - (-0.666 * 1280) - 1280 = 852.48
and at min x-pos, , the equation gives: 1280 - (-0.666 * 0) - 1280 = 0
can you find the corresponding evtest values for top left and bot right, it might help
RE: eGalax touchscreen calibration - brantje - 7th Jun, 2013 05:20 PM
(7th Jun, 2013 03:47 AM)Markamc Wrote: Ok, so you cannot see the pointer when using the touchscreen, and it has no effect on the reported pointer value when touching the screen.With current config i see the pointer in xbmc, but its only moving in the wrong direction.
So at max x-pos., the equation gives: 1280 - (-0.666 * 1280) - 1280 = 852.48
and at min x-pos, , the equation gives: 1280 - (-0.666 * 0) - 1280 = 0
can you find the corresponding evtest values for top left and bot right, it might help
RE: eGalax touchscreen calibration - Markamc - 7th Jun, 2013 06:37 PM
Ok, by changing the sign of the scale factor will reverse the direction of the axis, try it in a spread sheet.
max x = 1280 -(0.666 * 1280) - 1280 = -852.48
minx x = 0 -(0.666 * 1280) - 0 = 0
so, range is 0 < x < -852.2, which is the opposite of the other range result, 0 < x < 852.4
Not sure why you can't see any difference? check the syntax of the calib file for errors maybe?
RE: eGalax touchscreen calibration - brantje - 8th Jun, 2013 09:49 PM
Without the - sign where ever i touch, the mouse jumps to 1280,720.
Quote:The simplest way to swap axes is to switch the four wires cable plug's orientation which comes from the touchscreen to the touch controller.Maybe i can do this?
Do i need to swap this cable? looks a lot like the one coming from the touchscreen in the blog post.
RE: eGalax touchscreen calibration - brantje - 10th Jun, 2013 08:51 PM
I swapped the cable and now its working!
Now only thing left to do is the calibration.
But its driving me crazy, the formula mentioned in the blog isn't accurate.
Is there another way to find those values?
RE: eGalax touchscreen calibration - Markamc - 11th Jun, 2013 01:54 PM
(##Disclaimer .....works with 1a5 and beta1 for me)
Ok, this is a long process atm, but does work, for me at least.
I was originally looking into changing the xbmc patch, but not had the time yet.
Method : TS_CALIBRATE
Enter the following, line by line and obviously follow the instructions:
Terminal
sudo su
stop xbmc
apt-get install libtool automake build-essential git
git clone git://github.com/kergoth/tslib.git
cd tslib
./autogen.sh
./configure
make
make install
edit the ts.conf file and remove the '# ' from '# module-raw input' on line:2 using:
Terminal
nano /usr/local/etc/ts.conf
Close and save the ts.conf file
Next enter the following at the prompt......
Terminal
ls -l /dev/input/by-id
The output shows the input event that your touchscreen is linked to, My egalax TS is on /dev/input/event2
Terminal
root@xbian:/home/xbian/tslib# ls -l /dev/input/by-id
total 0
lrwxrwxrwx 1 root root 9 Jan 1 1970 usb-Riitek_Micro_Keyboard-event-kbd -> ../event0
lrwxrwxrwx 1 root root 9 Jan 1 1970 usb-Riitek_Micro_Keyboard-event-mouse -> ../event1
lrwxrwxrwx 1 root root 9 Jan 1 1970 usb-Riitek_Micro_Keyboard-if01-event-mouse -> ../event1
lrwxrwxrwx 1 root root 9 Jan 1 1970 usb-Riitek_Micro_Keyboard-if01-mouse -> ../mouse0
lrwxrwxrwx 1 root root 9 Jan 1 1970 usb-Riitek_Micro_Keyboard-mouse -> ../mouse0
lrwxrwxrwx 1 root root 9 Jan 1 1970 usb-eGalax_Inc._Touch-event-if00 -> ../event2
root@xbian:/home/xbian/tslib#
Paste the following lines at the prompt......
*** NB. change export TSLIB_TSDEVICE=/dev/input/eventX to suit your device event no. where 'X' is your value.
Terminal
export LD_LIBRARY_PATH=/usr/local/lib
export TSLIB_CONSOLEDEVICE=none
export TSLIB_FBDEVICE=/dev/fb0
export TSLIB_TSDEVICE=/dev/input/event2 <----***
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_CONFFILE=/usr/local/etc/ts.conf
export TSLIB_PLUGINDIR=/usr/local/lib/ts
and then
Terminal
ts_calibrate
Terminal
root@xbian:/home/xbian/tslib# ts_calibrate
xres = 1280, yres = 720
Took 16 samples...
Top left : X = 317 Y = 108
Took 34 samples...
Top right : X = 324 Y = 1937
Took 16 samples...
Bot right : X = 1863 Y = 1933
Took 19 samples...
Bot left : X = 1856 Y = 113
Took 11 samples...
Center : X = 1067 Y = 1028
-21.938232 -0.000184 0.646745
-75.615356 0.402788 -0.001534
Calibration constants: -1437744 -12 42385 -4955528 26397 -100 65536
root@xbian:/home/xbian/tslib#
The information you want is from the end of the output
Terminal
Center : X = 1067 Y = 1028
-21.938232 -0.000184 0.646745
-75.615356 0.402788 -0.001534
Top line is X, bottom Y
x offest is -21.938232 , x scale factor is 0.646745
y offest is -75.615356 , y scale factor is 0.402788
so for our calib file we need this:
Code:
calib_x_d=1302;calib_x_fact=-0.647;calib_y_d=796;calib_y_fact=-0.402;swap_axes=1;Create the calib file and enter the above calibration into the editor with:
Terminal
mkdir /usr/share/eGalaxCalibration
nano /usr/share/eGalaxCalibration/touchscreen_axes_calib
As you can see, I needed to change the direction of both axes by changing the sign on the scale factor and I also needed to swap the axes too, swap_axes=1.
ThHe offset values need to be "subtracted" from those already "programmed" into xbmc patch, hence (1280 -) -22 = 1302 (approx) and (720 -) -76 = 796
Hope it helps
bye y'all
(##Disclaimer .....works with 1a5 and beta1 for me)
RE: eGalax touchscreen calibration - brantje - 11th Jun, 2013 05:30 PM
Works almost here...
Terminal
make[1]: Leaving directory `/home/xbian/tslib'
root@xbian:/home/xbian/tslib# nano /usr/local/etc/ts.conf
root@xbian:/home/xbian/tslib# export LD_LIBRARY_PATH=/usr/local/lib
root@xbian:/home/xbian/tslib# export TSLIB_CONSOLEDEVICE=none
root@xbian:/home/xbian/tslib# export TSLIB_FBDEVICE=/dev/fb0
root@xbian:/home/xbian/tslib# export TSLIB_TSDEVICE=/dev/input/event2
root@xbian:/home/xbian/tslib# export TSLIB_CALIBFILE=/etc/pointercal
root@xbian:/home/xbian/tslib# export TSLIB_CONFFILE=/usr/local/etc/ts.conf
root@xbian:/home/xbian/tslib# export TSLIB_PLUGINDIR=/usr/local/lib/ts
root@xbian:/home/xbian/tslib# ts_calibrate
ts_open: No such file or directory
And if i run it directly (on pi not ssh):
ts_calibrate: error while loading shared libraries: libts-1.9.so.0: cannot open shared object file: No Such file or directory
RE: eGalax touchscreen calibration - Markamc - 11th Jun, 2013 07:49 PM
Sorry my fault, just edited post above,
Change the line
export TSLIB_TSDEVICE=/dev/input/event2
to suit your event device
I'll have a look later, I had that error at some point, and manage to fix it
Think it will work SSH, if you set the paths, if you run it locally, you need to set paths too.
RE: eGalax touchscreen calibration - brantje - 11th Jun, 2013 10:06 PM
Terminal
xbian@xbian /dev/input $ ls
by-id by-path event0 event1 mice mouse0 mouse1
ts_calibrate: error while loading shared libraries: libts-1.0.so.0: cannot open shared object file: No such file or directory
do i have to paste the export things in the file or execute them? Because i executed them.
RE: eGalax touchscreen calibration - Markamc - 11th Jun, 2013 11:14 PM
you can paste them for now, it's fine
I'll check later, I thought I'd prevented this error:
ts_calibrate: error while loading shared libraries: libts-1.0.so.0: cannot open shared object file: No such file or directory
Just tested on mine,
if I set the path export LD_LIBRARY_PATH= then i get the error
when I set it as export LD_LIBRARY_PATH=/usr/local/lib
Entering,
find / -name libts-1.0.so.0
the file is located in /usr/local/lib
I have no error, I am testing on beta1, i will check a5
RE: eGalax touchscreen calibration - brantje - 11th Jun, 2013 11:40 PM
Entering the lines in the file does not work, same error.
xbian@xbian / $ sudo find / -name libts-1.0.so.0
/usr/local/lib/libts-1.0.so.0
So it does exists :/
Also on Beta 1 here
RE: eGalax touchscreen calibration - Markamc - 12th Jun, 2013 12:03 AM
Ok, will test later and update instructions if I find a problem....and be a bit clearer with the instructions, for now just paste the "export path=" section to prompt, not into the ts.conf file.
RE: eGalax touchscreen calibration - brantje - 12th Jun, 2013 04:40 AM
Will try again with a fresh beta 1 image.
RE: eGalax touchscreen calibration - Markamc - 12th Jun, 2013 04:42 AM
I've modified the instructions slightly to avoid confusion and then tried it out on a fresh beta1 installation with no errors.