bella-hat

Bella Hat Python library for Raspberry Pi.

Docs

https://github.com/sunfounder/bella-hat/blob/main/docs/build/markdown/index.md

Installation

Install in python venv:

git clone https://github.com/sunfounder/bella-hat.git
cd bella-hat
sudo pip3 install ./

if you need to install in system environment, you need add "--break-system-packages" parameter:

sudo pip3 install ./ --break-system-packages

Enable i2c and spi

sudo raspi-config nonint do_i2c 0
sudo raspi-config nonint do_spi 0

Warning

See: https://github.com/jgarff/rpi_ws281x
On an RPi 3 you have to change the GPU core frequency to 250 MHz, otherwise the SPI clock has the wrong frequency.
Do this by adding the following line to /boot/firmware/config.txt and reboot:

core_freq=250

Warning

On an RPi 4 you must set a fixed frequency to avoid the idle CPU scaling changing the SPI frequency and breaking the ws281x timings:
Do this by adding the following lines to /boot/firmware/config.txt and reboot:

core_freq_min=500