I got distracted and had a hack on using a STL Link v2 clone as a development board. There’s a lot to like:
- A Cortex-M3 STM32F103C8T processor with 64 KiB of flash and 20 KiB of RAM
- 4 I/O lines and a LED to blink
- Decent support in STM32duino with a DFU bootloader
- Comes in a case and plugs directly into a USB port
I won’t continue with this though. The I/O is too limited and a Blue Pill is the same price sans case.