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ADALM-PLUTO: Manual GPIO Control of the AD9363 Chip

I would like to manually control the GPO pins GP00-GP03 of the AD9363 chip.

So far i tried two things:

1. Set them via sysfs as hinted in:  RE: how can i control pl_gpio0 in plutosdr? 

Result: I could export the pins, set them to ouput and set the value. However i could not meassure any voltage change.

2. Set them via the GPO Manual Control as stated in the documentation: https://wiki.analog.com/resources/tools-software/linux-drivers/iio-transceiver/ad9361?doc=ad9363.pdf#gpo_manual_control

I was able to set:

# echo 1 > adi,gpo-manual-mode-enable

However when trying:
# echo 0 1 > gpo_set

I received the error:
-sh: can't create gpo_set: Permission denied

Am I missing something here?


fixed spelling mistake
[edited by: Latissi at 8:43 PM (GMT -4) on 8 Sep 2022]