sn32: introduce software pwm

dexter93 commented 1 year ago

Sometimes manufacturers try to use GPIO pins for PWM that aren't in any of the CT16 banks, or pins that are both in A and B PWM banks causing the last picked one to override the other. Try to workaround it by doing software pwm in that case, timed by the hardware timer.

The driver defaults to hardware pwm control. In order to use the software control, add in config.h #define SN32_PWM_CONTROL SOFTWARE

Description

Types of Changes

[ ] Core
[ ] Bugfix
[ ] New feature
[ ] Enhancement/optimization
[ ] Keyboard (addition or update)
[ ] Keymap/layout/userspace (addition or update)
[ ] Documentation

Issues Fixed or Closed by This PR

124

Checklist

[ ] My code follows the code style of this project: C, Python
[ ] I have read the PR Checklist document and have made the appropriate changes.
[ ] My change requires a change to the documentation.
[ ] I have updated the documentation accordingly.
[ ] I have read the CONTRIBUTING document.
[ ] I have added tests to cover my changes.
[ ] I have tested the changes and verified that they work and don't break anything (as well as I can manage).

dexter93 commented 1 year ago

for #124 we might need to do some checks on pfpa logic

dexter93 commented 1 year ago

WIP, first results are promising. Will resume after the driver rework

dexter93 commented 1 year ago

changes now in #312 . closing

dexter93 commented 1 year ago

changes now in #312 . closing

SonixQMK / qmk_firmware