How to use A20 CAN interface with the A20 universal Armbian image for OLinuXino

CAN-Network-Diagram

To use A20 CAN interface you need A20-OLinuXino board and A20-CAN board.

Then you have to install the armbian A20 CAN overlay:

 

$ sudo armbian-add-overlay <path_to_the_dts_file>

 

  • connect A20-CAN to your OLinuXino and reboot.

You can see if CAN is available now:

$ ifconfig -a

   can0     Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 
            NOARP MTU:16 Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:10
            RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
            Interrupt:51

 

To use CAN interface you can install can-utils and setup the CAN interface:

$ sudo apt-get install can-utils 
$ ip link set can0 down
$ ip link set can0 type can bitrate 100000 triple-sampling on loopback off
$ ip link set can0 up

 

Now conect A20-CAN to the CAN network two wire interface.

To send a packet over CAN use :

cansend <can_interface> <packet>

 

For instance:

$ cansend can0 5AA#10.10.10

 

To sniff for CAN network messages you can use candump :

$ candump can0

 

Now you can log your car CAN networking messages and interpret them. There is plenty of info on the web about the different CAN messages which are exchanged on car CAN bus.

MOD-RS485-ISO – ISOLATED RS485/RS422 CONVERTER IN STOCK

Image

MOD-RS485-ISO is 3000V isolated RS232 to RS485/RS422 full duplex converter based on ISO35T integrated circuit from Texas Instrument. This module is perfect for industrial applications and transmission of data in highly noisy industrial environments.

Works with all our boards with UEXT connector.