Re: [avr-gcc-list] Newbie - should this work?

[Christoph Plattner]

Ok, that's new.
One furhter question. What's the reason for the change ?
Is there any optimazation in it ?

Otherwise, it is not my preferred method "hiding" functionality
too much into macros - especially in this example of primitive
I/O.
I am "POSIX fan", and one reason is the easy readablilty of code,
and not so complicated macro-hacks ...

Bye
Christoph




Artur Lipowski wrote:
> > -----Original Message-----
> > From: address@hidden
> > [mailto:address@hidden Behalf Of Christoph Plattner
> > Sent: Monday, January 20, 2003 12:24 AM
> > To: Volkmar Dierkes
> > Cc: address@hidden
> > Subject: Re: [avr-gcc-list] Newbie - should this work?
>
>
> > sorry, but I cannot understad this !
>
> ...
>
> > So this is the reason, why I cannot understand, that this code
> > works. Or is the io.h completely written in another way.
> > I cannot see a way per include files to get a
> >
> >                 PORTD = 0x00;
> >
> > to a
> >
> >                 outp (0x00, 0x12);
>
>
> It is compiler part of work.
> Remember also that IO space can be accessed like normal data memory (with
> offset).
>
> BTW from avr-libc documentation, deprecated list section:
> "Global outp(val, sfr)
> For backwards compatibility only. This macro will eventually be removed"
>
> Regards,
> --
> Artur Lipowski



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