The STM32C0 family of MCUs from ST Microelectronics is very tiny in resources. Very power efficient, small CPU, and a very tiny set of peripherals.
In this video I show an easy use of the very robust RTOS Threadx, ex-Microsoft, and now above Eclipse Foundation umbrella in a very cool MIT open-source permissive license.
Two threads run and communicate over a Queue of the Threadx operating system.
This is in less than 6KB of RAM.
ST Microelectronics advertises this MCU family with the appeal: “Your next 8-bit microcontroller running in 32bits.”
Very cool.
The board used in the video is Franzininho C0, a Brazilian hardware project of Embarcados.com.br guys.