RMT frequency other than 80 MHz?
Description
In the documentation I read that the frequency for the RMT function is fixed at 80 Mhz.
Any chance you could add also the other frequencies available?
Code Size
The additional code size should be very tiny.
Implementation
I hope the MicroPython maintainers or community will implement this feature
Code of Conduct
Yes, I agree
Change esp32.RMT.source_freq() to class method
To create a esp32.RMT() instance with an optimum (i.e. highest resolution) clock_div is currently awkward because you need to know the source clock frequency to calculate the best clock_div but unfortunately that is only currently available as an source_freq() method on the instance after you have already created it, i.e. we have a chicken and egg problem. So RMT.source_freq() should really be a class method, not an instance method and this PR changes that in the code and documentation. Of course this change is backwards compatible for existing code because you can still reference that function from an instance, or now also, from the class, i.e.
from esp32 import RMT
rmt = RMT(0, pin)
assert rmt.source_freq() == RMT.source_freq()