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First make sure you are running a linux-kernel with gpio-sim enabled. Otherwise recompile the kernel with it:

sudo apt install linux-source linux-headers-$(uname -r) build-essential libncurses-dev pahole
mkdir ~/kernel; cd ~/kernel
tar -xaf /usr/src/linux-source-*.tar.xz
cd linux-source*
yes '' | make localmodconfig
# configure gpio-sim here
make menuconfig
make -j$(nproc)
make bzImage
sudo make modules_install
sudo make install

Next install a Python 3.10:

sudo apt install wget build-essential libncursesw5-dev libssl-dev \
     libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev libffi-dev zlib1g-dev
wget https://www.python.org/ftp/python/3.10.14/Python-3.10.14.tgz
tar xzf Python-3.10.14.tgz
cd Python-3.10.14
./configure --enable-optimizations
sudo make altinstall

sudo apt update && sudo apt install libopus-dev libvpx-dev
sudo python3.10 -m pip install -r requirements.txt

After installation of new kernel and Python, you might want to restart your device and install the crosslab-virtual-gpio daemon. The install script only works on systemd enabled systems. It does not check for systemd usage!

cd src
sudo ./install

For running the Python example:

  • Open a PSPU web frontend using the json description in example.
  • Export the GPIOs (only once) and start the Python example (exporting GPIOs is only necessary when using the sysfs-based GPIO interface which is employed by the Python example:
cd example
./init_gpios.sh
python ./control_3axis.py

The C example can be run without exporting GPIOs as it uses the gpiod interface. For compiling please install libgpiod-dev upfront and link libgpiod.