[avr-libc-dev] Re: printf in avr-libc

[ken restivo]

Attached is a very small, trivial printf. Anyone's welcome to use it if they 
see fit. I did it a long time ago, and haven't looked at it since, but it 
worked at the time. I think I tested it with the UartSend routines in the old 
avr-libc sample code.

I wrote this in order to:
        1) Mix PSTR and memory variables in one printf, i.e.:
                kprintf("my pstr is %S and my ram str is %s\n", pstr, str);

        2) Automatically put the format into PSTR, i.e.:
                kprintf("this string goes into PSTR automagically\n");

        3) I only needed [xXdcsS] formats.

I still need to go back and combine the printSigned() and printUnsigned(), and 
experiment to determine whether 
        nybble > 10 ? nybble + 'A' : nybble + '0' 
is cheaper than the clunky PRG_RDB lookup I used. I suspect it will be.

-ken
---------
On Tue, Sep 10, 2002 at 11:20:34PM +0200, Joerg Wunsch wrote:
> As Jamie Morken wrote:
> 
> > Here is a working printf that I downloaded from some unremembered place
> > awhile ago  (it is not a full implementation but works well otherwise!)
> > http://www.rocketresearch.org/new/printf.zip
> 
> That version once accompanied Marek's distribution of avr-libc (under
> `experimental' or something like that).
> 
> We've at least got a copyright problem with it.  For whatever reason,
> Alexander Popov blindly stuck a GPL in front of the BSD license that's
> apparently inherited from the original source code.  Both are
> contradicionary to some extent, and i guess nobody really using
> avr-libc for their (non-hobbyist) projects is going to accept a GPL.
> 
> Anyway, my hope was to get it somewhat smaller than this version.  I
> already looked at the one in my FreeBSD system, but it looks already
> huge and twisted in the C code...  Well, let's see.  We can always
> fall back to the BSD version (and the copyright problem could easily
> be solved by simply starting to port it again straight from a BSD
> 
> -- 
> J"org Wunsch                                         Unix support engineer
> address@hidden        http://www.interface-systems.de/~j/
> 
> 
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