CAN bus testing tools and commands

[george]

Test tools

Canutils is a commonly used CAN communication testing toolkit that includes five independent programs: canconfig, candump, canecho, cansend, and cansequence. The functions of these programs are briefly described as follows:

• canconfig
  The parameters used to configure the CAN bus interface mainly include baud rate and mode.

• candump
  Receive data from the CAN bus interface and print it in hexadecimal format to standard output, or output it to a specified file.

• canecho
  Resend all data received from the CAN bus interface to the CAN bus interface.

• cansend
  Send the specified data to the specified CAN bus interface.

• cansequence
  Automatically repeat the increment number to the specified CAN bus interface, or specify the receive mode and verify the received increment number.

• ip
  Configuration of CAN baud rate, functions, etc.

Common commands

• Query current network devices:

ifconfig -a

• CAN start:

ip link set can0 down  //Close CAN
ip link set can0 type can bitrate 500000 //Set bit rate of 500KHz:
ip -details -statistics link show can0 //Print can0 information:
ip -details -statistics link show can0 //Start CAN:

• CAN sending:

Send (standard frame, data frame, ID: 123, date: DEADBEEF):

cansend can0 123#DEADBEEF

Sending (standard frame, remote frame, ID: 123):

cansend can0 123#R

Send (extended frame, data frame, ID: 0000123, date: DEADBEEF):

cansend can0 00000123#12345678

Sending (extended frame, remote frame, ID: 0000123):

cansend can0 00000123#R

• CAN reception:

Start printing and wait for reception:

candump can0