On Sun, 2004-08-22 at 14:54, Robert Monsen wrote:
> > Still, even with that, I only get a speed of 250kHz, still WELL below
> > what I'd expect of a processor running at 50MHz, that's still 200 cycles
> > just to flip a bit back and forth. TTYL
> >
>
>
> You might want to try it in asm, just to see if its any faster. The io call
> is probably whats getting you. You can often embed asm statements in C code
> using some kind of asm("stmt") statement.

FWIW the modification I made resulted in no more function calls, but it
seems the loop still ends up costing 200 cycles total, very weird...

> There may also be compiler optimization options you can enable. These might
> allow the compiler to forgo setting up the index register repeatedly.

I've looked and all I could find was a setting to "optimized for speed",
which I set, with no difference. TTYL

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