> Joe Koberg wrote:
>> http://s3.ae5ne.com.s3.amazonaws.com/dspic33_bad_sinewave.pdf
> I have no idea what you're trying to do and what this waveform is suppose=
d
> to look like.  However, this looks very much like high bits wrapping
> somewhere.  That could be due to overflow or improper handling of signed
> versus unsigned integers, for example.


Just for added detail, here is a capture containing "at least one"=20
complete cycle without a glitch.  To me this indicates the table is=20
being indexed properly (and the counter is wrapping OK), and that the=20
table values are valid.

     http://s3.ae5ne.com.s3.amazonaws.com/dspic33_bad_sinewave2.pdf


FYI the PC scope software is OSQOOP from

    =20
http://www.eig.ch/fr/laboratoires/systemes-numeriques/projets/osqoop-l-osci=
lloscope-libre/index.html

Joe


--=20
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