pwm_set_output_polarity

[tinkerbug]

Is there a way to set the output of two PWM channels to have opposite polarity? The Pico hardware PWM library has a method pwm_set_output_polarity that allows you set one channel to always be off while the other is on and vice versa. I am looking to create an alternating current for wireless power transfer and need the two channels to be always opposite. I am hoping to use Arduino for compatibility with other libraries, though I tested the Pico option and it does work.

Thanks!

[khoih-prog]

HI @tinkerbug

I've modified the library to enable push-pull mode as in your question. Please reply if this is what you'd like? Anything else you need to have ?

[tinkerbug]

That is awesome, thank you!

[khoih-prog]

Hi @tinkerbug

The RP2040_PWM v1.7.0 has just been published to add the new PushPull mode. Your contribution is noted in Contributions and Thanks

Please don't hesitate to post issue or even discussion, to request enhancement, new features, etc

Best Regards,

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Releases v1.7.0

1. Add functions setPWMPushPull_Int, setPWMPushPull and setPWMPushPull_Period for the new PushPull mode. Check pwm_set_output_polarity #21
2. Add these examples to demo the new PushPull mode

• PWM_PushPull
• PWM_PushPull_DynamicDC
• PWM_PushPull_DynamicFreq

3. Fix bug of half frequency when using phaseCorrect mode
4. Improve README.md so that links can be used in other sites, such as PIO