Datasheet

You can do this if the calibration on the screen isn't to your liking or any time you change the rotate=XX module

settings for the screen. Since the screen and touch driver are completely separated, the touchscreen doesn't auto-

rotate

Download and compile it with the following:

You must be running PIXEL (the GUI) while calibrating.

Before you start the calibrator you will need to 'reset' the old calibration data so run

DISPLAY=:0.0 xinput set-prop "stmpe-ts" 'Coordinate Transformation Matrix' 1 0 0 0 1 0 0 0 1

Now you'll have to run the calibrator while also running X. You can do this by opening up the terminal program and

running the the xtcal command (which is challenging to do on such a small screen) OR you can do what we do which is

create an SSH/Terminal shell and then run the calibrator from the same shell, which requires the following command:

DISPLAY=:0.0 xtcal/xtcal -geometry 640x480

Note that the geometry may vary!

If you are using a 2.4"/2.8"/3.2" 320x240 display with landscape orientation, use 640x480. If you're in portrait, use

480x640.

If you are using a 3.5" display with landscape, use 720x480, portrait is 480x720

Follow the directions on screen

Once complete you'll get something like:

sudo apt-get install libxaw7-dev libxxf86vm-dev libxaw7-dev libxft-dev

git clone https://github.com/KurtJacobson/xtcal

cd xtcal

make