Buzzer stops working with MatekH743-bdshot firmware

[xfacta (Shawn)]

Using BDSHOT can take away from other non-important features due to the resource requirements of BDSHOT.
Personally I disable the buzzer anyway, since usually you can hear it inflight. They can also cause fluctuations on the 5vdc for the flight controller.

How to enable BDSHOT

bdshot changes the DMA allocation and usually changes the PWM timer allocation. In particular it cannot use complimentary timer channels which some manufacturers use to make timer/pin allocation easier. Switching from complimentary timers to regular timers usually involves a timer that is currently used for something else (e.g. the buzzer). For non-H7 finding a good DMA allocation can be a merry dance involving many changes. These are fairly fundamental changes that change both the configuration…