Unstable sine PWM output

[pxidr84]

Maybe it isn't DIV32... I don't know, but when I remove it, the glitches disapppears. I've also already tried to change the dummy values.

My min. frequency is 1Hz (freq=10), reload value=about 0
and my max. frequency is 120Hz (freq=1200), reload value=about 64600

And I don't directly use the 0-1023 potentiometer value, first I convert it to the "freq" variable :

potsense=(potsense<<6)**maxfreq

"maxfreq" correspond to the maximum frequency defined by the user. Here, "maxfreq"=1200. So here "freq" variable varies between 0 and 1200. Note I'm using an additional number to have the 0.1Hz accuracy (for exemple, 50.2Hz frequency equals freq=502).

I have to said, your timer reload routine with DIV32 was pretty accurate and provides very good results. In terms of accuracy, I really had a 0.1Hz precision, both in low and high frequencies.