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

[mnbhjk3]

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

[KevinFFF]

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

@mnbhjk3

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

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

[mnbhjk3]

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

[KevinFFF]

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