[microblaze-uclinux] Write to GPIO

[Dag Mattis Pettersen <dagmatti@xxxxxxxxxxxxxxxxxx>]

Hi all,

hope you guys are not yet tired from my newbie questions. :-)


I'm trying to use the GPIO to read the buttons and set the LEDs on my 
ml401 card.

I added

ifdef CONFIG_XILINX_GPIO
DEVICES +=      \
        gpio,c,10,185

to my vendors/Xilinx/uclinux-auto/Makefile, and I got the /dev/gpio 
device. Now I can compile a simple program and read the buttons 
(IBMGPIO_IN), but for some reason I cannot set the LEDs with IBMGPIO_OUT. 
Is there some trick I have to do to make this work?


Thanks in advance!



--
Sincerely Mattis


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