Acces GPIO register on Jetson Xavier NX module and modify GPIO02 value

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
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1

Hi all,

We outsourced the development of a carrier board for a Jetson Xavier NX module. Everything work perfectly. We have a SD card holder in order to have the possibily to add external storage. The problem is that the SD card holder is not under alimentation so the company told me that : "This power supply is done through the GPIO02.
Once the OS has booted correctly, this IO must be switched to 0 and the SD card holder power supply should be triggered."
I have no idea how to do that. I can acces de desktop of the board but I don’t where to go in order to acces the registers.

Can someone help me?
Thank you in advance

3

hello arnaud.tullio,

you may refer to GitHub - NVIDIA/jetson-gpio: A Python library that enables the use of Jetson's GPIOs to control GPIO;
you’re able to control it via sysnode; please also check GPIO Changes session for the steps to check the GPIO number,
thanks