8000 Fix and restore PR: #9343 Fix delays and rounding in samd PWM · Issue #9448 · adafruit/circuitpython · GitHub
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Fix and restore PR: #9343 Fix delays and rounding in samd PWM  #9448
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@dhalbert

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@dhalbert

The code changes in #9343 were reverted by #9447, because they broke screen backlighting on SAMD51 boards like PyPortal (and maybe other PWM things as well), as reported in #9443.

The intention of #9343 is good, but it needs to be fixed.

Note that #9343 did not affect backlighting on Hallowing M0, so I'm guessing the #9343 changes were OK for SAMD21 but not SAMD51.

@timchinowsky I hope you are able to take a look at this. Thanks.

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