[Jetpack6] USB-CAN: Cannot find device "can1"

Autonomous Machines Jetson & Embedded Systems Jetson Orin Nano
1

Hi, I am using Jetpack6. In Jetpack5, I just connect the device and it is newly recognized as can1 and I could immediately communicate with CAN by typing sudo ip link set can1 type bitrate 500000 and up commands. I want to use multiple CAN buses so USB-CAN must be used in addition to built-in CAN.

However, since Jetpack6, only the Built-in CAN can be used because the USB-CAN is not recognized.

I would like to know if there are any changes in the kernel drivers or something with the update from Jetpack5 to Jetpack6, and if you know how to get USB-CAN to work or what to look for.

3

Hi k.uchiyama,

Are you using the devkit or custom board for Orin Nano?
Are you using JP6.0 DP or JP6.0GA?

Do you mean this USB-CAN can not be recognized through lsusb?

4

Thank you for reply.

I’m using devkit for Orin Nano and JP6.0GA.

It can be recognized thought lsusb. USB-CAN device is not recognized as CAN device.

5

Is the issue specific to your USB-CAN device?

How about USB mouse and keyboard? Could they working with JP6.0GA?

6

I think so. Other USB devices such as mouse and keyboard are woking on JP6.0GA.

7

If other USB devices work as expected, then the USB functions seem okay.

Is there any dmesg/errors showing when you plug/remove your USB-CAN device?

8

Run sudo dmesg, it is displayed like below.

[   16.486528] Bridge firewalling registered
[   16.593288] nvidia-modeset: Loading NVIDIA UNIX Open Kernel Mode Setting Driver for aarch64  540.3.0  Release Build  (buildbrain@mobile-u64-6269-d7000)  Wed Apr 24 20:03:36 PDT 2024
[   18.628627] ACK 04 d4
[   18.633459] ACK 04 d4
[   18.746701] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   19.634482] rfkill: input handler disabled
[   28.719198] rfkill: input handler enabled
[   32.790740] rfkill: input handler disabled
[  219.494147] loop7: detected capacity change from 0 to 8
[  225.206276] loop7: detected capacity change from 0 to 8
[  458.828750] usb 1-2.1: new full-speed USB device number 5 using tegra-xusb
[  481.898047] usb 1-2.1: USB disconnect, device number 5

The last two lines are related to plug/remove my USB-CAN device. So it seem okay.

But it still be shown Cannot find device "can1"

9

I use this USB-CAN module.
https://www.inno-maker.com/product/usb2can-cable/

10

Sorry that we don’t have this USB-CAN module to verify it locally.
Does your USB-CAN adapter only can not work on Orin Nano with JP6?

Do you need to run any command to setup can1?

What’s the expected message would be?

11

When I use JP5, I can use USB-CAN just run like below.

sudo ip link set can1 type can bitrate 500000
sudo ip link set can1 up

But, now USB-CAN cannot be used in the same way.

I have tried what is in the SDK documentation, but I don’t know how to get it to work.
I am looking for ideas on something to try.

12

In JP5 do an lsmod and check if the required modules are present on JP6. NVidia has a habit of removing important modules from the distro, e.g. mdadm-raid or wwan-qmi, so you could be a victim of that. In that case you need the kernel sources and recompile the missing modules for yourself - and you need to repeat that for each new kernel revision.

1 Like
13

Please share if the module is missing in your case.
You can also share the full dmesg for further check.

1 Like
15

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.