GD32E103xx

At some point, I had a number of Green Pill boards made with a GD32E103xx MCU mounted. I had hoped for these to be a drop-in replacement for my regular Green Pill board, but unlike the GD32F103 series, these MCUs are based on an ARM M4 core and the memory map differs slightly.

Unfortunately, unlike the GD32F103 and GD32F405, this particular device does not appear to have a STM32 equivalent, so while some parts work, I have been unable to make USB work from STM32CubeMX.