Hi All.
I would like to be able to control an GPIO Output pin on one of the header pins of a Jetson AGX Orin Dev-kit.
A 1PPS signal will arrive as an input to another pin and be bound to the kernel PPS consumer by a “ppsctl” function and sync the internal system clock this way.
What’s the Jetpack version in use for AGX Orin devkit?
Sorry that I’m not clear about your requirement.
Do you want to control a GPIO(Output) as PPS source and connect it to another pin(Input) as PPS input?
Please let us know the exact pin you want to use and the block diagram of your connection.
Hi Kevin - thank for the answer, I find no traces of Jetpack from the suggestions at Google and GitHub - do you have any commands for me to send?
How does JetPack relate to GPIO/1PPS, sorry I do not understand ?
The nVidia itself has no accurate clock itself.
So, the 1PPS is provided from another system (separate module/chip made to be a stable XO), then shall enter a GPIO input-pin at the nVidia for it to sync the internal clock nVidia board.
Secondly, a GPIO output-pin will be used to forward sync to the next controller in the chain - if possible from the kernel functions.
The pin used will be any appropriate output-pin from the pin-mux.
Anecdotally, my GPS unit produces a PPS signal with a 3.3V logic level. From what I recall the GPIOs are 3.3V tolerant on Jetson Dev Kits, if you’re using a different carrier that might be different.