Joe,

Thank you for explaining your suggestion about using the Comparator.  I wil=
l give that consideration once I figure out why my current approach isn't w=
orking, which I will now explain.

As mentioned previously, I was able to use a single CLC module to AND-gate =
the NCO with my 32kHz PWM (for volume reduction), and then send the CLC out=
put to the CWG module.  But as I mentioned in a previous post here, the inv=
erted CWG output is not what I need.  Anyway, here is the complete ASM code=
 listing for doing that:

https://cl.ly/1P3z440W0M0b

The solution I have been pondering is the use of two CLC modules so I can a=
void CWG altogether for volume reduction, and yet still be able to generate=
 the proper inverted waveform on RC4.  To do this, CLC1 would AND-gate the =
NCO with my 32kHz PWM (for volume reduction) and then output that on RC5.  =
I would then use CLC4 to AND-gate the NCO with the PWM again, but this time=
 I would INVERT the NCO output as it enters the AND gate, sending that CLC4=
 output to RC4.  I would not have any deadband this way (like I would get i=
f I used the CWG), but I just wanted to give it a try so I could connect an=
d scope and see if the output would be acceptable for my H-BRIDGE.  But unf=
ortunately, I don't get an output on RC5 or RC4 for some reason.  I've sear=
ched for my code for errors but cannot find any.  Perhaps I am overlooking =
something.  Here is the complete ASM code:

https://cl.ly/0x3W12220F1v

I know the PWM is working fine in my ver.0.4 code (with both CLC modules), =
since I can put the PWM on a pin and check that with a scope.  And again, I=
 have the CWG module disabled (see my "PWMsetup" subroutine in that ver.0.4=
 code).  Disabling CWG that way should relinquish control of RC5 and RC4 to=
 the CLC modules, I would think.  I have the CLC1 and CLC4 modules properly=
 setup (to my eyes) in my code to output to RC5 and RC4.  But again, when I=
 write the HEX file to the 16F1508, drop it in the breadboard and check RC4=
 and RC5 with a scope and I get nothing at all from either pin.

Perhaps I made a mistake that you can spot in the ASM code?

Many thanks,

James W.


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