MCAN early control on Jetson AGX Xavier industrial

Dear NViDiA experts,
Our system is used the Jetson AGX Xavier Industrial module.
I have a request to send a Message CAN in 100ms early under booting up after power on the system.
Thanks

hello thinhnt7,

what exactly the 100ms you’re going to send a message. is it before enter linux kernel or during the bootloader stage?

Hello JerryChang,
Device shall advertise/send an its existence, and its status/capability through CAN to Main device within 100ms from power up.
Thanks

hello thinhnt7,

you’ll need boot into linux kernel then enable CAN network drivers.
please also refer to CAN documentation,
$L4T_Sources/r32.6.1/Linux_for_Tegra/source/public/kernel/kernel-4.9/Documentation/networking/can.txt

so, the possible approach would reduce the boot-up time,
please see developer guide, Kernel Boot Time Optimization for reference,
thanks

Hello JerryChang,
It is impossible to send a CAN message in kernel for 100ms from boot.
I think that, I want to early CAN control as sqlash screen. So I can modify the MB2 boot for my ideas?
Thanks

hello thinhnt7,

currently, it doesn’t support CAN control during bootloader stage.