Re: [Gumstix-users] Newbie with a Connex and GPS

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Hi Jana,

On Sat, Apr 12, 2008 at 4:46 PM, Jana Coakley <ja...@ag...> wrote:
> Hey Dave thanks,
> How do I access any of the pins individually. I just want to tie them to
> turn on 4 different leds in different sequences.

Once you figure out the GPIO number you can do:

modprobe proc_gpio
echo "GPIO out set" > /proc/gpio/GPIO99 (replace 99 with the GPIO pin number)
Replace "set" with "clear" to change the output to be low.

You might also want to try:
<http://docswiki.gumstix.com/index.php/Sample_code/C/gpregs>
but replace

#ifdef __ARM_EABI__
              0x40E00000 / MAP_SIZE
#else
              0x40E00000 & ~MAP_MASK
#endif

with
              0x40E00000 & ~MAP_MASK

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/