>Roman,
>I've got a suspicion: that would be conventional PWM, wouldn't it?

Bob:-

To me, the unique feature of Walter's suggestion is that it didn't
have to be called with an exact time between calls. If you started
making it a sawtooth (a counter or whatever) then you have to start
worrying about beat frequencies between whatever is going on in
the software and the period of the sawtooth. Ugh.

As you say, if you call it regularly at fixed times, it's just a
software PWM.

Best regards,



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