[Gumstix-users] Tutorial / FAQ for breakout-gs, GPIO?

[Kevin W. <kw...@gm...>]

I have looked through the Intel PXA255 Developer's Manual and I
understand most of the information about GPIO's, but what I'm trying
to figure out is how I actually implement something in code.

Is there a particular header file I can use to get information from,
like how to write to/read from a certain address? What about the
/proc/gpio stuff? Is that slower or not as C-friendly?

If anyone has or is able to show me something like a simple program
that makes an LED flash or get input from a pushbutton connected to
the breakout-gs that would be killer and should totally be put on the
wiki.

-Kevin