How to using PH.00 GPIO35(SOC_GPIO21) is not working

I am using GPIO controlling with shell

echo 391 > /sys/class/gpio/export
echo out > /sys/class/gpio/PH.00/direction
echo 1 > /sys/class/gpio/PH.00/value

It’s not working…
But other GPIO is working ex: PH.01/PAC.00/PAC.01

Hi mnbhjk3,

Are you using devkit or custom board for AGX Orin?
What’s your current Jetpack version in use?
Do you change to su mode before these operation?

$sudo su

I’ve verified it should work on AGX Orin devkit with Jetpack 5.1.

Hi KevinFFF:
I am using devkit,and using su mode with Jetpack 5.0.1

Could you help to update to latest Jetpack5.1.1(R35.3.1) to verify?

Please just use SDK manager to flash clean Jetpack 5.1.1 on the devkit.
Install Jetson Software with SDK Manager :: NVIDIA SDK Manager Documentation

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