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Well, in the spirit of overthinking this, what about using one of the adc inputs to drive one of the leds? won't an led create a voltage when it's exposed to light? This could be read at startup, ma ...

It's funny that it seems so hard to generate a random number, yet a large amount of posts on this site are about random events occurring in a seemingly deterministic design.

Kinda reminds me of the ...

I kinda like jeremiah's idea, but with a twist. Since it's hard to differentiate between a long pulse and a short one without something to compare to, I would consider something like this:

Just do ...

SOLVED:

after several attempts to delete & reinstall MPLABX and the CCS plugin, I finally landed on the solution. The missing step, apparently.

I went to:
Tools>Options>Embedded
and ...

Thanks for the checklist.

I went thru all of what you said - same result.
I even renamed the plug-in directories to force the installer to create new. I had two of them, one was probably a remna ...

I ran some of the MPLABX updates and now it can't find the CCS compiler. I removed and reinstalled MPLABX (was v5.5 or so, now v6.05) but seem to still have the same problem.

I removed and reinsta ...

Would either of you guys be interested in buying a slightly used UV eraser and some windowed 16c56/57 chips, LOL!
I remember I just used to keep the lamp running all day while I swapped chips and d ...

Just looking at the .h file, there is no revision reference within it. So there is no way to tell what compiler version it is associated with. They are small but many, so it would be impractical to ...

Just to follow-up, I was sent a patch from CCS. I dropped it into my PICC\DLL\5.105 folder per instructions.
Now I get a compile error:

*** Error 44 "C:\Program Files (x86)\PICC\devices\18LF ...

another one of my sources of confusion. This is right out of the CCS manual:

#opt
Syntax:
#opt n
Elements:
All Devices: n is the optimization level 1-9 or by using the word "compress" ...

response from CCS support:
"It was an optimization bug related to the CLRF instruction. A bank selection instruction was incorrectly removed.
It showed up when that statement used registers in ...

Update:
Even though the short example version worked, the full program still did not.
I commented out the entire program and got it down to one line of code that would cause the failed calculati ...

Hmm...well that's embarrassing!

I just copied your code into a test program and ran it thru PICSIM and mine worked, too.
I guess I should have tried that first, eh?

I will have to dig deeper. ...

I've sent this off to tech support, but I thought you guys might spot something quicker.

I'm not sure if it's my code or a math issue with the latest compiler. My code worked fine in previous vers ...

Hmm...I did read a lot of app notes back then.
It seems like every idea I have is probably a spinoff of something I've read or seen and then forgotten about.

Thanks, T.
At least my subconscious i ...