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[avr-libc-dev] [bug #19178] Propose: Exact-Delay

From: Joerg Wunsch
Subject: [avr-libc-dev] [bug #19178] Propose: Exact-Delay
Date: Wed, 09 Jun 2010 08:16:29 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv: Gecko/2008120121 Firefox/3.0.5

Update of bug #19178 (project avr-libc):

                  Status:                    None => Fixed                  
             Assigned to:                    None => joerg_wunsch           
             Open/Closed:                    Open => Closed                 
                 Release:                    None => Any                    


Follow-up Comment #1:

Provided you are using a patched compiler (the patch is
supposed to be integrated into GCC some day), you can get
exactly this with the function


which has been documented by <avr/builtins.h> for some time
now.  Exact delays for very short cycle counts must be
provided by the compiler rather than the library, as the
overhead to setup the delay has to be taken into account,
and this overhead is only known to the compiler.


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