Boards which have the Maple USB reset hardware need to defined HAS_MAPLE_HARDWARE There are definitions for LED_BANK (GPIO Port) LED pin (Pin in that port) LED_ON_STATE (Whether the LED is lit when ...

Additionally, the bootloader now works with "generic" STM32F103 boards that do not have the additional USB reset hardware which all Maple and Maple mini boards have.

While things like the Arduino platform certainly opened up the gates of microcontroller programming to a much wider audience, it can also be limiting in some ways. The Arduino IDE, for example, abs… ...