On this machine: http://www.nexcom.com/ProductModel.aspx?id=376f4fa5-64f3-41d1-afba-60ee48883465
I'm trying to access gpio, but neither Nexcom or Intel support has been very helpful.
The closest I've come is this blog post which says I have to write my own driver: http://geekswithblogs.net/BruceEitman/archive/2010/08/01/windows-ce-using-a-driver-to-readwrite-hardware-registers.aspx
From the nexcom manual it states gpio port is located at 0EE4H (0xEE4). What am I supposed to with this info? Am I really supposed to write my own driver?
edit: is must work on windows xp embedded and windows 7 embedded.
You can't directly access hardware resources (like GPIO pins) from userspace processes unless there's a driver that exposes this functionality. This means that either you find a suitable driver (I have no clue about where to look for such a thing) or you write your own.
p.s. It may also be the case that your OS expose the GPIO pins somewhere. On a linux prototyping board I worked on once there were a few files (IIRC /dev/gpioX, with X being the number of the pin) you could read/write to if you had the appropriate permissions.