The code isn’t quite there yet, but [ZiB] has proven a software-based USB implementation on the STM8 is possible. All the code is available for download (comments in Russian) and a video demoing ...

Even after they have been snapped off, there is a DIL socket on-board for re-programming. Each chip has a 16MHz STM8 core with 8kbyte of flash. System-control features include watchdog, clock control, ...

If you’ve ever eyed up the very inexpensive STM8 processor, you’ll want to check out [Shane Burrell’s] video (see below) about how to get started with the STM8.

There is also a Single-Wire Interface Module (SWIM) for programming and debugging. It is an 8-bit STM8 Core device which is designed for high code efficiency. It contains six internal registers, 20 ...