Touch screen 90 degrees out

[computinginschools]

I don't know whether this is the right place to ask this but I'm having some trouble with this touch screen (https://www.amazon.co.uk/gp/product/B075JFT9SF) which I want to use with my Raspberry Pi 2 and pi-scan. The touch screen works fine with a normal raspian installation and is calibrated very well however does not work at all with the 'touch screen' version you supplied (I understand this is for the raspberry pi touch screen only) or the mouse version. I have removed the read only permission from the / and /boot mounts and installed the drivers for the screen (https://github.com/goodtft/LCD-show) and the screen resolution is now fine but the touch screen is 90 degrees out - when I press the top right, it shows in the bottom right and when I press on the bottom right it shows in the bottom left etc. I realise this is a very specific issue but could you help at all?

[duerig]

I don't know what the interaction is between the Kivy libraries (this is what is used for the touch-screen UI) and your screen drivers. So I can't help directly. However, if you want to take a vanilla image and install all the pre-requisites for Pi Scan yourself, you can do the following:

• Set up locale/keyboard stuff (unless you want to leave it as Great Britain keyboard locale)

• Install these apt-get packages:

python-setuptools python-dev pkg-config python-pip build-essential python-pil
git-core
dbus python-dbus udisks2 exfat-fuse
liblua5.2-0 lua5.2 liblua5.2-dev libusb-dev
build-essential libltdl-dev libusb-dev libexif-dev libpopt-dev libudev-dev pkg-config git
automake autoconf autopoint gettext libtool wget

• Install gphoto2 (for latest version, install here instead of from apt-get https://github.com/gonzalo/gphoto2-updater )

• pip install -I Cython==0.25.2

• pip install lupa --install-option="--no-luajit"

ldconfig

udev_version=$(udevd --version)

if [ "$udev_version" -ge "201" ]
then
udev_rules=201
elif [ "$udev_version" -ge "175" ]
then
udev_rules=175
elif [ "$udev_version" -ge "136" ]
then
udev_rules=136
else
udev_rules=0.98
fi

• Install wiringpi

• Install Kivy dependencies:

libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev
libgl1-mesa-dev libgles2-mesa-dev
libgstreamer1.0-dev
gstreamer1.0-plugins-bad gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-ugly
gstreamer1.0-omx gstreamer1.0-alsa libmtdev1 libmtdev-dev
xclip

• Install Kivy

apt_file="/etc/apt/sources.list.d/mitako.list"
apt_entry="deb http://archive.mitako.eu/ jessie main"
apt_key="http://archive.mitako.eu/archive-mitako.gpg.key"
apt_cache="/var/lib/apt/lists/archive.mitako.eu_dists_jessie_main_binary-armhf_Packages"

echo "Registering pipaOS repository: $apt_entry"
echo "$apt_entry" | sudo tee $apt_file > /dev/null

echo "Adding repository key $apt_key"
curl -L "$apt_key" | sudo apt-key add -

echo "Refreshing available packages"
apt-get update

apt-get install python2-kivypie

• Install configuration files. See attached.

files.zip

Now you should be able to play around with the kivy options in .kivy/config.ini (default options are at: https://github.com/Tenrec-Builders/pi-scan/blob/master/config/touch.ini ). The read-only stuff isn't installed either so you don't need to muck around with remounting to modify stuff. But you do need to remember to shutdown cleanly. Once you have figured out the driver/kivy issues, please post here and I may integrate those options back into the main code base.

Best of luck.

[computinginschools]

First of all, thanks for the comprehensive response! I am a bit of a noob with Linux so I may need to pick your brains about the finer points of the installation. Am I OK doing that on here or via email?

[duerig]

Probably best to useemail if you want to get into the weeds. You can ask any questions at help at tenrec dot builders.

On Mon, Apr 16, 2018, at 12:35 PM, computinginschools wrote: First of all, thanks for the comprehensive response! I am a bit of a noob with Linux so I may need to pick your brains about the finer points of the installation. Am I OK doing that on here or via email?> — You are receiving this because you commented. Reply to this email directly, view it on GitHub[1], or mute the thread[2].>

Links: 1. #16 (comment) 2. https://github.com/notifications/unsubscribe-auth/AA1sTJwxvLkou-Ncg9905gqbIQsWVUlCks5tpORpgaJpZM4TSlVi

[duerig]

Just one other thought on this. As a workaround, just rotate the screen and control it with a keyboard. Every button on the interface has a labelled hotkey. So you can do everything you need without actually using the touch screen at all.