18F2520 clock speed ?

[Archangel]

Actually, my old Robosapien walked off with what I had under my pillow (you'll have to do a forum search for that thread) some time back, and I've not seen him or it since... however I think he's earning a good living somewhere as the girls in the neighborhood seem to always have smiles on their faces...

Hmmmph, Powertools, whoa ho ho ho

[Gixxer]

...........zzzzzzzzzzz

wow, thank you Sooo much for such useless information....

John

[Melanie]

John

Get up off your butt and do a forum search for DEFINE OSC (a secret phrase known only to everyone that programs with MeLabs PICBASIC who happens to have read the product manual) that I mentioned back in post number #4 in this thread. Not got the manual? Then go onto the manufacturers website (this forum has got a dozen pointers to it) where you can locate the product manual and look up DEFINE OSC. You do remember who makes your compiler don't you? No? (there's a highlighted clue in this paragraph and Google comes free with every internet connection). In case you missed it - DEFINE OSC is the answer to your problem. Once you've got the manual, go look in the section I pointed you to (again back in Post #4). Don't say that you've had "useless information" when you were told the answer a few hours after posting your question.

Geeze, teach a guy to fish and he'll spend all day in a boat with a crate of beer.

[Archangel]

Geeze, teach a guy to fish and he'll spend all day in a boat with a crate of beer.

That's why I'm learnin' to fish

[Gixxer]

MEL,

Your right, you did explain in post #4 that using DEFINE OSC was needed to adjust all required timings. You then said "There's also a whole section entitled "How fast is fast enough?" (section 7.1 in my manual). "
To which I asked "where do I find your book ?"

How the hell should I know that you have some connection to Melabs.
Honestly, I don't really care who you are affiliated with, I was just trying to get this circuit working. As it turns out, the board is fully functional and has been since the first post, I had already figured out that it would work with a 4Mhz xtal.
I did try the define osc before my first post, I had deleted it from my code because it didn't work. That is what lead to Post #3, which I described how the xtal fuse settings vastly affected the timing, again looking for a constructive reply !

Thanks

[manwolf]

"where do I find your book ?" = Melanie's manual
Melanie's manual = MicroEngineering Labs, Inc. PICBASIC PROtm Compilier manual



In my copy

Section 7.1 is on page 171, look down the page about 3/4 of the ways. Sentence begins "However..."


You should be able to find the answers to your questions there.

The PBP Manual is also known as: the Manual, the ugly green book, the bible, etc. around these parts.

That explains my problems with any xtal other than 4mhz. I will check into my PBP manual for info about DEFINE OSC, but will that allow the use of other osc frequencies ?

If you had checked the PBP manual you would not have asked that question or needed to for that matter.

[Gixxer]

Hi,

Yes I had cheched the manual, just didn't know or cared who wrote it. I don't run and post a question here or anywhere unless I just can't figure something out. I will read anything I can get my hands on, online or otherwise, until I find the solution. Granted, I'm no expert, so this process can take some time, but usually I will succeed. I DID refer to the manual, don't need a forum to tell me to look there first. As I said, I had also ALREADY tried using DEFINE OSC 10Mhz, it did not work. The output baud timing was way off. I also wasn't sure about what config fuses to set with the U2 programmer regarding the xtal. The original crystal is a SMT type, 10 Mhz. I tried all different fuse settings, which of course affected the timing, but none gave the proper result at the pic output. So I installed a SMT 4Mhz xtal and, you guessed it-works great.