C-Berry_Display/README.md

C-Berry_Display

Some code to bring the C-Berry Display alive. Updated code from admatec GmbH so it will compile with newer gcc-versions

Dependencies:

Raspberry Pi Userland: https://github.com/raspberrypi/userland

$ sudo apt install build-essential pkg-config cmake $ mkdir /tmp/ramdisk $ sudo mount -t tmpfs -o size=128M tmpfs /tmp/ramdisk $ cd /tmp/ramdisk $ git clone https://github.com/raspberrypi/userland $ cd userland $ ./buildme

Add login username to /etc/group for audio, video:

... audio❌29:username video❌44:username ...

Create '/etc/udev/rules.d/10-local-rpi.rules', to set VC device group and permissions:

SUBSYSTEM=="vchiq", GROUP="video", MODE="0660" SUBSYSTEM=="vc-sm", GROUP="video", MODE="0660" SUBSYSTEM=="bcm2708_vcio", GROUP="video", MODE="0660"

Then reboot:

$ sudo reboot

Testing (shows a rotating tiger): $ sudo apt install libfreetype6-dev

$ cd /opt/vc/src/hello_pi $ sudo sh rebuild.sh $ export LD_LIBRARY_PATH=/opt/vc/lib $ ./hello_tiger/hello_tiger.bin

BCM2835 c library for Raspberry Pi:

Look for the latest version (http://www.airspayce.com/mikem/bcm2835/)

$ wget http://www.airspayce.com/mikem/bcm2835/bcm2835-$VERSION.tar.gz

$ tar zxvf bcm2835-$VERSION.tar.gz $ cd bcm2835-1.36 $ ./configure $ make $ sudo make check $ sudo make install

Compile

• Complie tft_test and fb2cberry with "make"
• Go to the root folder

$ cd SW/tft_test $ make $ sudo ./tft_test # shows some test pictures and waits for touch input (if availabe)

$ cd SW/fb2cberry $ make $ sudo ./fb2cberry & # copys the HDMI output to the framebuffer (around 2% cpu usage), very slow and runs in the background (because of "&")