DSBOX-TX2NX CANBus Interface Tutorial

DSBOX-TX2NX CANBus Interface Tutorial

Jetson TX2 NX

20 May 2021
WHAT YOU WILL LEARN?

1-  The pinout of I/O connector  

2-  Example of an CANBus application 

3-  Examples of can-utils tools 

ENVIRONMENT

Hardware: DSBOX-TX2NX

OS: JetPack 4.5.1 (L4T-32.5.1)


This blog post is suitable for:

• NVIDIA Jetson TX2 NX SOM with DSBOARD-NX2 (Rev. 1.1) 

• DSBOX-TX2NX


In this blog post, we will test the CANBus interface of DSBOX-TX2NX.



First, let's look at the I/O connector. On the connector, there are 2 pins for CAN Bus and 1 pin for isolated ground. When using CAN Bus always double check which ground pin you are using. You must use digital ground for CAN Bus applications.


To test CAN Bus functionality, we used USB-CAN adapter. Connect that adapter to the USB port of the host PC and install its driver software if necessary. To the other side of the adapter connect your device’s CAN pins.


On next step, activate CAN drivers and activate CAN interface with “ip link” command. On host side, be sure that you are using same bitrate with your device.

• sudo modprobe can

• sudo modprobe can-raw

• sudo modprobe mttcan

• sudo ip link set can0 up type can bitrate 500000


Lastly, you can use can-utils tools to communicate.


Use cangen to write random data:

• cangen can0 -v






Use cansend to write data:

• cansend can0 123#1122334455667788





Use candump to listen bus:

• candump can0






Thank you for reading our blog post. 



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