The current practice of adding topics to the default set isn't scalable,
as it affects all setups.
By making sure topics are advertised on init, logger can just discard
topics that don't exist. This does not work for all topics, so topics are
specifically marked as optional. It can be extended to more topics later
on though.
This reduces the list of topics by ~35 on a pixracer configured as quad,
and reduces RAM usage by ~1KB.
This allows modules to do a first-come-first-serve pin/timer reservation
on bootup.
E.g. camera trigger reserves any of the pins, and then PWM/DShot output
will just use the rest of the available pins.
- parameter updates can be quite expensive because they trigger nearly all modules to reload all of their parameters immediately
- limit modules from updating faster than once per second
* Break out dshot.h from dshot.cpp and rename files to reflect the class name.
Move DShot class specific #defines from drv_pwm_output.h to dshot.h.
Replace c-style casts with static_casts, standardize method naming, single line comment styles, and formatting.
Rename update_dshot_out_state() to enable_dshot_outputs().
Beat Küng