Re: [Flashforth-devel] Git(?), v5.0, and long division

[Mikael N. <mik...@pp...>]

Hi Craig,

Here is in general about git
http://git-scm.com/
http://git-scm.com/book/en/Getting-Started-About-Version-Control
http://git-scm.com/downloads

And here about git at sourceforge 
https://sourceforge.net/p/forge/documentation/Git/

Here you can find uq/mod
https://sourceforge.net/p/flashforth/code/ci/master/tree/PIC18/forth/qmath.txt

\ Divide a 64 bit unsigned number with a 32 bit unsigned number
\ The result is a 32 bit remainder and 32 bit quotient
uq/mod ( qu du -- du-rem du-quot )

https://sourceforge.net/p/flashforth/code/ci/master/tree/PIC18/forth/qmath.txt

But instead of loading uq/mod I would prefactor and scale (divide Fcy 
and the UART rates by 100) and use the 32/16 bit words.
You don't need 32 bit accuracy for the UART rates.

BR Mike


On 03/05/2014 01:53 PM, craig bair wrote:
> Doing my first serious application project in FF3.8-Pic18 and having a blast with it, but you've gotten my curiosity up...
>
> 1)  Is there a tutorial or walk-through for using Git?  From what I can seee in SourceForge, it looks like a hash of sort-of-DIFF files for multiple projects and I've got no clue where to start with it.  Things sound like v5.0 is coming along nicely and it might be nice to take a look at it.
>
>
> 2)  Is there a word for doing 32bit by 32bit division and am I just missing it?  Pouring over the docs and a quick scan of the source has only turned up a few variants of 32bit by 16bit which I've been able to work around up to this point.  I thought it might be more elegant to calculate SPBRG load values on the fly instead of building a lookup for each chip clockrate/baudrate.  Then I tried to divide 16000000 by 921600 and said "Oh BUGS!"...  Will I need to build this one myself?  (or just pre-factor the living bejeezes out of this problem, too?)
>
>
> Just curious,
> craig bair
>
>   
> ...averaging may or may not help clarify data.
>     If Bill Gates walks into a bar,
>     the average patron becomes a millionaire...
>
> ------------------------------------------------------------------------------
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