MCP2515 SPI CAN

[ricky...@gmail.com]

Hi,

I am trying to get an MCP2515 running on SPI1.0. I can successfully load the .dtbo,  found the device under /sys/bus/spi/devices/spi1.0, but couldn't seem to get the CAN bus running. Does anyone know if the driver is already compiled into the kernel? Or if I need to do something to activate it?

Thanks for the help!

Regards,

Ricky Chang

[Travis Lytle]

On the console do: lsmod

You should see something like:

can_raw                 7618  3

can                    31379  1 can_raw

mcp2515                 8341  0

mcp251x                12797  0

c_can_platform          7581  0

c_can                  12220  1 c_can_platform

can_dev                14358  3 c_can,mcp2515,mcp251x

If mcp251x is there the driver is loaded.  You can do an ifconfig -a to show if active too.

To bring up the interface you can check here: http://elinux.org/Bringing_CAN_interface_up

Travis

[ricky...@gmail.com]

Hi Travis,

Thanks for the reply. 

The problem was with the driver, the MCP251x drivers that came with 4.4.30-ti-r64 kernel are not compatible. I got a new driver and now I can bring the CAN bus online. But other problems now came up. Whenever I tried to send with cansend, I got a TXWAR/EP error and the link went down(it didn't say it went down but it's not responsive to cansend commands afterwards). And if I tried to receive using candump, when the other device send a frame, I got RXWAR/EP errors. I've tried sending with the Canbus connected or disconnected it's still the same. Do you have any idea what might be causing this problem?

Thanks,

Ricky