Re: CAN Interface on Toradex Board

[Oliver Hartkopp <socketcan@hartkopp.net>]

On 23.10.2013 18:49, Spies, Raphael | BFFT GmbH wrote:
> Hi everyone,
> 

Hi Raphael,

> 
> at the moment i try to get a can interface to work on a toradex 
> tegra2 evaluation board. in the manual there are some instructions:
> 
> 
> http://developer.toradex.com/software-resources/arm-family/linux/linux-%28colibri-t20%29-know-how#CAN
> 
> I downloaded the packages from: 
> 
> http://developer.toradex.com/files/toradex-dev/uploads/media/Colibri/Linux/Extra/can-packages.tar.bz2
> 
> and installed them on my device. When I try to set my bitrate as explained 
> 
> "ip link set can0 type can bitrate 125000"
> 
> it quits with 
> 
> "RTNETLINK answers: Invalid argument".

Can you see the can0 interface itself?

E.g. with

ip link show
ip -det link show

or

cat /proc/net/dev

??

Can you see this message from the documentation

[    4.904898] CAN device driver interface
[    4.932793] Colibri EvalBoard V3.1a/MECS Tellurium xPOD CAN Initialisation
[    4.979119] mcp251x spi3.0: probed

when invoking 'dmesg' ?

> 
> 
> A strace command yields a line with
> 
> 
> "open("usr/lib/ip/link_can.so", ...) = -1 ENOENT (No such file or directory)".
> 

This looks like the installed iproute2 package is broken.

My 'ip' does not try to access "usr/lib/ip/link_can.so"

at least the leading slash "/" is missing.

Is it possible that you have a built-in "ip" in your busybox which is invoked
here?

Say

 ls -l `which ip`

to check if 'ip' is linked to the busybox binary.

Regards,
Oliver

> 
> Does anyone have any idea how can I fix that problem? or in what direction I have to search for solutions?
> 
> 
> Thanks a lot,
> Raphael Spies
> 
> 
> 
> Kernel version 3.1.10-gd831d2d, build as explained on toradex homepage