PWM invert support for ESP32

[DavideRossi]

Description

The ESP32 port does not support the invert parameter in PWM.
By reading the first comment to this post https://www.reddit.com/r/esp32/comments/zd9o2t/ho_do_i_invert_the_ledc_pwm_signal/ it seems like it would be quite trivial.
With a little guidance I might be able to do it myself, I can compile micropython, I just need to understand where to start for this specific task.

BTW: for some reason the preview of docs/library/machine.PWM.rst in Github does not show the paragraph in Constructors. It took me a while to understand why the page was showing up when searching for PWM invert while I could not spot invert in the page: I was looking at the preview where the constructor is missing!

Code Size

No response

Implementation

I intend to implement this feature and would submit a Pull Request if desirable

Code of Conduct

Yes, I agree

[robert-hh]

See PR #10854, which implements it among many other improvements.

[DavideRossi]

See PR #10854, which implements it among many other improvements.

Thanks @robert-hh, do you have idea if I can just apply it against the current master branch (or 1.24) and have it working with no major issues?

[robert-hh]

You can fetch that PR and rebase it onto the current master branch. That's what I did several times for testing.