Accessing hardware under RTEMS

[OUTWATER]

Greetings all - 

I have an application in which I need to provide contol of miscellaneous 
peripheral devices such as:

LEDs
Memories (SRAM, FIFO)
Hardware control registers

It seems like the best/elegant/preferred way to do this is via RTEMS device 
drivers.

Opinions?

If a device driver is the way to go, is there a basic example of one somewhere 
that I could use as a starting point?

Thanks!
Keith