Re: [avr-gcc-list] sbi and cbi

[Dave Hansen]

From: "Royce & Sharal Pereira" <address@hidden>:

> Hi Andi,
>
> On Fri, 18 Feb 2005 13:01:28 +0700, andi  
> <address@hidden> wrote:
>
> > Hi,
> >
> > Looks like cbi and sbi (using 'C' not asm) command doesn't exist too :(
> >
> > Andi
> -----------------------
> Where have you been? All this has been discussed ad nauseam on this list a  
> month ago ;)

Indeed.  Synopsis:  It's a good thing!  The sbi and cbi macros are 
non-standard, confusing, and just an all-around bad idea.  They were 
necessary once, but have been redundant and deprecated for years.

To fix old code, change things like "sbi(PORTA,7);" to "PORTA |= (1<<7);".  
As a temporary measure to fix large volumes of code, create a "legacy.h" 
header, and define the macros in there:

  #define sbi(p,n)  (p) |= (1<<(n))
  #define cbi(p,n)  (p) &= ~(1<<(n))

And #include "legacy.h" in the source file.  But _only_ in old code: use the 
more standard syntax in new code.

HTH,
  -=Dave