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Comparator question...

 
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KamPutty
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Comparator question...
PostPosted: Thu Mar 16, 2006 1:13 pm     Reply with quote
Hi all,

I would like to use a comparator on my 16f688. Looking around on the CCS docs, and here on the site, I'm still alittle unsure.

Here is my pnseudo code...

Code:

    // comparators
   setup_comparator(A0_A1);


This says "use one comparator", and the +V is connected to A0, and ground (-) to A1.

Code:

    setup_vref(VREF_HIGH|15);


Okay, this is where I'm gonna guess. This is where I tell the system my "trip" point in voltages. And the or "|" allows me to adjust the setting by dividing the power by my value.

Am I safe to assume that VREF_HIGH is determined at run time when I apply power and not a coded constent?

Now to get a value back, I can use the interrupt

Code:

#INT_COMP
void isr(){...};


What about this variable that is listed in the 16f688 header file

Code:

#bit C1OUT = 0x19.6


Could I just check that?

Thanks all!

~Kam (^8*
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Mar 16, 2006 4:08 pm     Reply with quote
See my sample program in this thread.
http://www.ccsinfo.com/forum/viewtopic.php?t=22955
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