SAMD21 inverted HF PWM for H-Bridge - How?

Official Hardware Nano Family Nano 33 IoT
1

Hi!

I am trying to build a PWM source for a H-Bridge amplifier.

Need:

  • 2 separate PWM signals
  • 180 deg. offset between them (1st pin is high when 2nd pin is low, vice versa)
  • Small dead time between the pulses (although the pull up time of the pin might be slow enough for this to be fulfilled)
  • At least 200 kHz of frequency

I have successfully made this same kind of setup with Arduino Mega 2560, but the SAMD21-based Arduino Nano 33 IoT is giving me headache!

image
image1913×982 107 KB

This is the signal I'm trying to achieve.

I have tried pretty much everything and even asked AI for help with registry usage, with no success.

So is it even possible? And what is the possible route to success?

Any help is much appreciated :smiling_face_with_tear:

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