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I used an Arduino Uno, first. I have now tried with an AtMEGA2560, using the same code (but switching SCL/SDA pins from A4A5 to digital20/21 marked SCL/SDA); the scope output...
Cool, thanks for the input! I'll give those a try. (As I'm just now starting to dive into the RF mire, but this sounds useful.)
Comment after the fact: The Si5351 PLLs may take up to 10ms thereabouts to lock onto a new frequency when changed, so (though I haven't gotten this far yet) to...
Additional comment which solved the problem: Kicking up the Wire library speed from 100kHz to 400kHz with Wire.setClock(400000L); and using a bulk transfer to shove out a pre-calculated array of...
My code (on the Mega2560): In setup: Wire.begin(); Wire.setClock(400000L); - Create a set of precalculated bytes to send out, using the formula from the Si5351 library with mult, num and...
> @frohro Hi Rob - excellent, thanks much! I'll take a look at this shortly. :) > > thanks much and 73, > Ben, KD5BYB Did the above replies help?...