PIC16F690 Comparator C1 - some helpage needed!

[HankMcSpank]

Ok, after spending ages on this ...and getting desperate, with one last push, I swapped everything around to use comparator2 instead - that one works fine.

Heaven knows what's going on with then C1IN+ pin 19 !!

[Darrel Taylor]

I guess I'm a little late, but ...

You had RA0 set to Output (C1IN+)
And RA2 set to Input (C1OUT)

TRISA.0 = 0
TRISA.2 = 1
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[HankMcSpank]

Thanks Darrel, but in my defence...

1. It was late (like 2.00am UK time).
2. I'm a noob
3. I'm stoopid!

[Darrel Taylor]

I disagree.
You seem to be doing fine.
He who makes no mistakes, makes nothing.
(one of my signature quotes)

Anyhow, I've been playing with the tone detector I mentioned in the other thread.
Getting some interesting results, but nothing workable yet.

If that's where you're headed with the comparator, I may have some thoughts ... although, not very good one's.
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[HankMcSpank]

I disagree.
You seem to be doing fine.
He who makes no mistakes, makes nothing.
(one of my signature quotes)

Anyhow, I've been playing with the tone detector I mentioned in the other thread.
Getting some interesting results, but nothing workable yet.

If that's where you're headed with the comparator, I may have some thoughts ... although, not very good one's.

Thanks for the moral support!

re extracting frequency from an analogue using a comparator - well, as you know, I used a sig gen - it was good, I used a guitar...alas, as predicted the result were just too erratic. I'm not at the stage yet where I feel up to programming in sufficient 'intelligence' to cater for all the variations (averaging, disregarding counts outside a 'window etc'), but that's where I want to get to.

In the meantime, I've since changed to a PIC16F690 iiit's a challenging little PIC for someone at my level, but it has way more pins for me to play with (the last IC got on my nerves becuase I had to share some of the programming pins with the comparator pins - mucho switching back & forward)

I read that Application Note you linked me to in my other thread ....I'm still standing on the chair trying to catch the info that went way over my head!

[Darrel Taylor]

Well I thought I would have something to say ... but I haven't got the darn thing working either.

Maybe I should go read that appnote again.
I'll use a butterfly net to catch the stuff wizzing over my head.

Haven't given up yet.
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