Add option invert PWM output about litex-cnc HOT 3 CLOSED

This feature is now ready to be tested (note: recompilation of the firmware required)

I tried to quickly test as you asked - I don’t see any problems...
I checked 6 channels from 5Hz to 100kHz, duty from 0.001 to 0.999. (+4 stepgen while moving)

The only thing I had to deal with was that yosys did too many routing iterations (more than an hour), although there were no problems before this patch.
I didn’t wait for it to finish and ran build on the new version of yosys (0.38) - this got rid of the problem, although there is a warning “Max frequency..”

The install_toolchain.py script still installs v0.24...(this line) From users of a similar project (litehm2) I heard that yosys has made a lot of improvements over the past year.

from litex-cnc.

This feature is now ready to be tested (note: recompilation of the firmware required)

pip install git+https://https://github.com/Peter-van-Tol/LiteX-CNC@76-add-option-invert-pwm-output
sudo env "PATH=$PATH" litexcnc install_driver
litexcnc build_firmware <JSON_CONFIGURATION> --build -a
cd /<CARD_NAME>/gateware
litexcnc flash_firmware colorlight.svf

from litex-cnc.

Thank you for testing!

Will merge this branch to main and open an additional issue to upgrade Yosys to 0.38.

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