By the end of this section, you will have learned how to create a virtual CAN interface on the Gemstone development board.
In the Gemstone operating system, a virtual CAN interface can be created, allowing data communication without the need for any additional hardware.
  • After connecting to the Gemstone operating system, install the kernel-module-vcan-6.1.83-ti module to create a virtual CAN interface.
sudo apt install picocom kernel-module-vcan-6.1.83-ti
  • Activate the installed module using the modprobe command.
sudo modprobe vcan
  • Follow the commands below to create the virtual CAN interface.
sudo ip link add dev vcan0 type vcan
sudo ip link set up vcan0
  • Create a script file named can-test.sh and open it.
touch can-test.sh
nano can-test.sh
  • Copy and paste the following code into the can-test.sh file. Save and close the file.
#!/bin/bash

while :
do
   cansend vcan0 123 #AABBCCDDEE112233
   sleep 1
done
  • Install the can-utils package to use commands such as cansend and candump for sending and receiving CAN packets.
sudo apt install can-utils
  1. Open two terminals.
  2. Start listening to the CAN interface from the first terminal. 
candump vcan0
  1. Run the can-test.sh script from the second terminal.
./can-test.sh

Communication over virtual CAN interface