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Re: [avr-libc-dev] [Bug #3327] I read from phorum that outb() is deprec

From: E. Weddington
Subject: Re: [avr-libc-dev] [Bug #3327] I read from phorum that outb() is deprecated? But still can found a note from library "Use outb
Date: Tue, 29 Apr 2003 10:22:44 -0600

On 29 Apr 2003 at 9:06, Theodore A. Roth wrote:

> On Tue, 29 Apr 2003, E. Weddington wrote:
> :) On 28 Apr 2003 at 23:41, address@hidden wrote:
> :)
> :) > There are some portability issues that are better handled by
> using :) > outb() instead of the <SFR> = <VAL>; idiom. :) :) Such as?
> Not so much portability, but a valid point:
>   http://www.egnite.de/pipermail/en-nut-discussion/2003-April/000670.h
>   tml
> Also, It's conceivable that someone could want to use a chunk of on
> linux (using direct io access) or some other system and avr. Of
> course, it would be some ugly code full of #if's and such.
> If someone has some compelling arguments for deprecating outb and
> friends, the bug report can be reopened.


You're right. 

After going through the convolutions in sfr_defs.h, the outb, inb, 
etc. macros look to be equivalent to the <sfr> = <val> idiom. And I 
can now see the portability issues.

Perhaps (eventually) adding a note about portability issues and the 
reasons for using / not using these macros in the docs would help 

No arguments. Bug stays invalid and closed.

Thanks Ted.


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