AVR-Chat

David VanHorn wrote:

> If they've started preloading SP to the end of ram in the larger
> devices, that's news.
> It's no big deal either way, four instructions that execute once isn't
> anything to worry about.

Normally, I'd agree with you ... but in this particular instance I have
exactly 2 words left in some real tight code that I rewrote from a
AVRFreaks contribution -- the original author didn't init stack and uses
a rcall ;-)    The code works, but I started wondering if I was playing
Russian Roulette by no init of SP.

(And yes, I also agree that it is good and "normal" practice to init the
stack pointer to highest address in SRAM -- but even then you can easily
run into weird problems if you don't allocate enough space.  I was just
questioning the misleading "must" in Atmel's statement.)

I've submitted a query to Atmel support, so we'll see what is up.

Don