AVR-Chat

David VanHorn wrote:
>> As for variable initialization, I can't provide any information with any
>> confidence. My reference is the avr-libc documentation and the gas (gnu
>> assembler) documentation. For gcc tutorial, Smiley has a nice book out
>> with some of the chapters on line on his website.
> 
> You see where I'm coming from.  :)  I don't want to waste the
> space/cycles with needless inits, but I want to absolutely KNOW which
> it is.
> Small chips are not a place to waste cycles or bytes.

   GCC might be a rude surprise then!  There is an init section of code 
linked in that handles startup housekeeping that will take up several 
hundred bytes.  That is what handles the "int foo = 1;" stuff, so I 
don't think that is avoidable.  Of course it also handles setting up the 
call stack, DATA heap and all the rest of the stuff that goes into a 
high level language.  If you are coming from assembly programming it all 
looks pretty "dirty", but essential.

DLC

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Dennis Clark          TTT Enterprises
www.techtoystoday.com
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