WS2812B diodes using STM32F103C8T6 MCU.
Diodes are driving by SPI interface with DMA.
Library description: https://msalamon.pl/adresowalne-diody-ws2812b-na-stm32-cz-1/
https://msalamon.pl/adresowalne-diody-ws2812b-na-stm32-cz-2/
https://msalamon.pl/adresowalne-diody-ws2812b-na-stm32-cz-3/
The FX library is based od WS2812FX Arduino librarby by kitesurfer1404 - https://github.com/kitesurfer1404/WS2812FX