Tx2 test can failed

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

hi ,i test tx2 (jetpack4.4,32.4.3)can bus failed.my step follows:
sudo modprobe can
sudo modprobe can_raw
sudo modprobe mttcan

sudo ip link set can0 type can bitrate 500000 dbitrate 2000000 berr-reporting on fd on
sudo ip link set can1 type can bitrate 500000 dbitrate 2000000 berr-reporting on fd on

sudo ip link set up can0
sudo ip link set up can1

sudo apt-get install can-utils

cansend can0 123#abcdabcd //one terminal
candump can1 //second terminal

but no message.
do i have to connect CAN0 TX to CAN1 RX using a wire??
how can i test loopback? or other way testing CAN?

3

Hi zsjalive,

This link is a good example, and there are step by step description to help you.

4

i have no CAN tranceivers on my hand. i just want to test loopback.can you tell me the way to test loopback?

5

hi zsjalive,
For loopback, you cannot test CAN0 to CAN1 transfer without transceiver.
For individual CAN controller loopback test: you do not need any connections. controller has internal loopback connected when used “loopback on” in can command
$ ip link set can0 up type can bitrate 500000 loopback on
$ candump can0 &
$ cansend can0 123#abcdabcd