CODEWITHSUNDEEP
raspberry-pican-bus
Korenron
Korenron

Reputation: 101

raspberry pi - canbus can-utils timeout?

I'm using raspberry PI with MCP2515 + the canbus-utils.

My raspberry pi is working on battery - so when I switch on the car&power up the PI - everything is working.

But when I switch off the car, then try to switch on after 1 hour I get no replay from the canbus-utils, and I need to restart the can service.

Any idea why?

Does the canbus-utils has some kind of TImeout? that can be change\ignore?

Upvotes: 0

Views: 1301

Answers (1)

Benno Geels
Benno Geels

Reputation: 118

When the PI is the only member on the bus the controller switch to bus_off state, because nobody is acknowledging the messages send and the message will otherwise be send indefinitely, to protect for bus overload of the retransmissions.

Also there was a version of the kernel a couple of months ago wich not recovered from some error condition. The latest version of the kernel has this fixed.

use sudo rpi-update to get the latest kernel.

Also at the initialisation script of your CAN bus add the following

ip link set can0 type can restart-ms 100

Upvotes: 2

Related Questions