Congrats to Alexey Kozin who recently added ArduPilot support for the F4BY board using ChibiOS. As far as I know, Alexey is the first to complete a ChibiOS port not including Tridge and Sid so well done! OneShot125 and Oneshot250 already work and D-shot is also on the way!
Specs of this new board and where you can purchase one are on our F4BY wiki here.
For those looking to follow Alexey’s lead and port ArduPilot to another flight controller, our porting guide is here on the wiki and we also have an active ArduPilot ChibiOS gitter channel!
Congrats again to Alexey Kozin!