Feature request: support for one wire PAS

[AkbarRamzan]

Currently only quadrature sensors are supported but many (cheaper) PAS sensors use only a single wire.
There are 2 signal types for one wire PAS:
One pulse every time a magnet passes when pedalling forward, no signal when pedalling backwards
One pulse of a certain width when pedalling forwards, a different width when pedalling backwards. Backwards pedalling can be used for regen.
Ideally the servo pin should be the default as uart could be used for Bluetooth / display but ebikes are unlikely to use servo.

[AkbarRamzan]

[AkbarRamzan]

#243 (comment)
some code for PAS that may be useful.

[AkbarRamzan]

I captured the signal generated when pedalling forwards using lisp at increasing RPM

It appears back-pedalling has <50% duty cycle so you can work out pedal direction that way. Back-pedalling for regen would be nice.

[AkbarRamzan]

I'm adding support through lisp/ QML and packages. Stay tuned

[ReFeXe]

How did you manage to implement this?
Have varied width pas.
when using code #243 (comment)
I get triggered both ways

[ReFeXe]

I'm adding support through lisp/ QML and packages. Stay tuned

I can't figure out how to adapt the above code

[ReFeXe]

I did it, though.
https://github.com/ReFeXe/bldclcd3/blob/release_6_02/applications/app_pas.c