Does anyone have any help on this? I'm getting this too, using Ubuntu on 
the Beaglebone Black. I've upgrade to 3.8.13-bone31 (the only higher 
version is 3.12 but I can't get the cape to load)

I get some valid readings (for maybe a few minutes after I load the cape) 
then I get the resource temporarily unavailable, and there's nothing in the 
dmesg output to indicate an error :(


On Monday, December 2, 2013 7:56:11 AM UTC-5, [email protected] wrote:
>
> I am getting resource temporary unavailable when I tried to read ADC pins 
> from BeagleBone Black
>
> root@beaglebone:~# cat /sys/devices/ocp.2/helper.11/AIN*
> cat: /sys/devices/ocp.2/helper.11/AIN0: Resource temporarily unavailable
> cat: /sys/devices/ocp.2/helper.11/AIN1: Resource temporarily unavailable
> cat: /sys/devices/ocp.2/helper.11/AIN2: Resource temporarily unavailable
> cat: /sys/devices/ocp.2/helper.11/AIN3: Resource temporarily unavailable
> cat: /sys/devices/ocp.2/helper.11/AIN4: Resource temporarily unavailable
> cat: /sys/devices/ocp.2/helper.11/AIN5: Resource temporarily unavailable
> cat: /sys/devices/ocp.2/helper.11/AIN6: Resource temporarily unavailable
> cat: /sys/devices/ocp.2/helper.11/AIN7: Resource temporarily unavailable
>
> What might be the reason for the error ?
> The ADC pins AIN0 to AIN5 are connected to thermistors and the actual 
> voltage at the ADC pins is around 0.77 volt
>

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