On 26.10.2015 14:04, Robert Nelson wrote:
On Sun, Oct 25, 2015 at 7:49 AM, <m.schies...@gmail.com> wrote:
Hi out there,
hope someone can help me to activate the CAN Bus interface at Beaglebone
Black. I describe shortly what I
have done so far
The can interface works fine, what did you use to interface the bbb's
pins to your can network?
Regards,
Hi Robert,
I use a simple breakout board,
https://www.pi-shop.ch/adafruit-proto-cape-kit-for-beagle-bone
soldered CAN Transceiver SN65HVD230D on it and connected Pin
P9_26 -> 4
P9_24 -> 1
GND -> 2
+3.3 -> 3
CANL -> 6
CANH -> 7
GND -> 8
I verified the signals by oscilloscope and receive a good signal at pin
P9_26 but the socket interface does not show any frame. The same signal
connected to raspberry and it receives valid frames at a bitrate of
125kBit.
If I try to send frames from bbb I don't can measure any signal at pin
P9_24. And the interface goes straight into BUS-OFF mode, if I don't
give "restart-ms 100" option during interface creation.
Do I give the "loopback" option
ip link set can0 type can bitrate 125000 triple-sampling on loopback on
everything is fine and I can receive my own frames.
could it be a bitrate issue / frequency problem?
Do you have a tool handy, reading register values form the arm. Maybe
this would help to understand the issue better
Regards
markus
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