Cannot get GPIO control working via sysfs!

dijitanix · Posted at 12/15/2018 00:49:16

Hello,
I am trying to control GPIO pins using sysfs but nothing is working. I have tried both armbian and ubuntu.

Here's my code:
[Trying to control Pin 40 on the board]

on debian, I tried:
echo "93" > /sys/class/gpio/export
echo "out" > /sys/class/gpio/gpio93/direction
echo 1 > /sys/class/gpio/gpio93/value

on ubuntu, I tried the above and also tried using 1093 instead of 93. Nothing works.

I get no errors, but the pin voltage is not changing.
Can someone please point me to a properly documented way to control GPIO on ROC-RK3328-CC ?

dijitanix · Posted at 12/15/2018 09:20:20

Is there no proper, official documentation for the GPIO pins on the ROC-RK3328-CC ?
The only "documentation" I've seen online doesn't work https://libre.computer/2018/05/1 ... e-for-aml-s905x-cc/

penguin · Posted at 12/18/2018 17:50:18

@dijitanix , which pin do you want to manipulate?