R38.2 can dev not set up status

Robotics & Edge Computing Jetson & Embedded Systems Jetson Thor
1

hi::

now set the can0 up,but failed,

agi@ubuntu:~/caneth$ ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10
link/can
3: can1: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10
link/can
4: can2: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10
link/can
5: can3: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10
link/can

agi@ubuntu:~/caneth$ candump can0
read: Network is down
agi@ubuntu:~/caneth$ sudo ip link set can0 up
RTNETLINK answers: Invalid argument
agi@ubuntu:~/caneth$

3

Hi mingming,

Are you using the devkit or custom board for Thor?

You didn’t specify the CAN configurations before set can0 up.
Please refer to the commands I shared in Jetson Thor CAN bitrate issue - #3 by KevinFFF to verify.

4

hi：KevinFFF

can0 -can3 is it a physical interface？

5

Yes, you can also refer to the pinmux spreadsheet for the exact pins used for each interfaces.

6

thansks！

command ok

rmmod mttcan
modprobe mttcan
ip link set down can0
ip link set can0 up type can bitrate 1000000 dbitrate 8000000 berr-reporting on fd on loopback on
candump -x any &
cansend can0 123#abcdabcd

8

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