The /dev/can0 node is missing. How to create it manually?
Best regards
Andi
/dev/can0 is missing
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CAN is provided as Socket CAN. This means it is not a character or block device that will appear under /dev, but it is a network device that is controlled via ifconfig or better the ip program. The Readme.txt shows a section of how to use CAN:
Display MoreCode- CAN
- ---
- The CAN driver uses Socket CAN, i.e. the CAN bus is accessed as a network
- device, similar to an ethernet card. If the driver is available, you can find a
- can0 device when issuing the command
- ifconfig -a
- But better use the newer ip program as the older ifconfig does not know
- anything more detailed about CAN controllers.
- ip link
- Before you can activate this device, you have to set the baud rate. This is not
- done via the /sys filesystem anymore. But instead it requires the ip program.
- For example to set 125000 bit/s for CAN, you would issue the command:
- ip link set can0 type can bitrate 125000
- Then you can activate the CAN device:
- ip link set can0 up
- Now you can create sockets that access the CAN device.
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Remark: Please note that only the Premium version of the armStoneA8 is equipped with a CAN controller. Especially the Embedded World 2012 Special Edition (for 49 EUR) has no CAN controller on-board. You can see this in the boot messages. If you see a message like this
then you don't have a CAN controller on your board.
