Problem running CAN bus example in nRF Connect SDK v1.5.0

RE: Problem running CAN bus example in nRF Connect SDK v1.5.0

olovh — Tue, 18 May 2021 12:01:02 GMT

Finally got some time and the new logic analyzer in place - after some troubleshooting we found two bugs in sdk 1.5.1 - then realized that both have been corrected in upstream zephyr - in other words you can close this issue. Thanks!

https://github.com/zephyrproject-rtos/zephyr/commit/73db443320d735deebe028261b7f8d7c136f0032

https://github.com/zephyrproject-rtos/zephyr/commit/99a0c416bf51adc515b342574f12c694f008dcdb

RE: Problem running CAN bus example in nRF Connect SDK v1.5.0

olovh — Thu, 25 Mar 2021 09:00:03 GMT

no worries, yes the fact that loopback works points towards hardware communication error. We have thought the same but unfortunately our logic analyzer now seems to be lost. Will have to look into buying a new one and continue troubleshooting before moving up to 1.5.0 then.

RE: Problem running CAN bus example in nRF Connect SDK v1.5.0

Didrik Rokhaug — Tue, 23 Mar 2021 14:27:46 GMT

Sorry for the late reply.

Are you able to use a logic analyzer to capture the communication between the nRF9160 and the MCP2515?

It would be interresting to compare the SPI communication and commands sent between v1.4.2 and v1.5.0.

Looking at the code for the CAN driver, when it is configured to use loopback mode, the messages never leave the nRF9160. So loopback mode cannot be used to test the MCP2515.

RE: Problem running CAN bus example in nRF Connect SDK v1.5.0

olovh — Tue, 16 Mar 2021 16:14:43 GMT

Hi,

there are no other nodes on the bus besides a PC-dongle connected to PCAN-View. It does not send any messages on the bus and when sending messages from the dongle to v.1.5.0 application is looks like CAN RX goes permanently low. Same setup everything works under v1.4.2.

We don't see any errors even if enabling debug printouts on CAN driver.

best Olov

RE: Problem running CAN bus example in nRF Connect SDK v1.5.0

Didrik Rokhaug — Tue, 16 Mar 2021 14:40:55 GMT

Hi,

Are there other nodes on the CAN bus that is ACK'ing the messages sent from the CAN-controller?

Or doesn't it send any messages at all on the CAN bus?

Do you get any errors in the log?

Best regards,

Didrik

RE: Problem running CAN bus example in nRF Connect SDK v1.5.0

helsing — Mon, 15 Mar 2021 20:04:49 GMT

Hi Olov,

I will be looking into this tomorrow. Thank you for sharing the files.

Best regards,

Håkon