i.mx8qm flexcan bus error at board side

[aksh9354]

hello I am using the i.mx8qm MEK board for adas project

as per the procedure provided in the below link

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/System-Controller-Firmware-101-Resource-...

I did the image build now can communication is working but the issue is if the first message sends from the board that time can bus is in an off state (error counter is also zero).

But if the first message sent from another node or host pc that time can communication working without any issue, can bus working fine

any idea regarding this behavior??????

[igorpadykov]

Hi aksh9354

one can check if both sides use similar mode, can or can-fd. Example for legacy mode

with "disable-fd-mode" can be found on

https://github.com/alliedvision/linux_imx8_apalis/blob/master/arch/arm64/boot/dts/freescale/fsl-imx8...

Also may be recommended to try to reproduce issue using two MEK boards and latest

nxp linux from source.codeaurora.org/external/imx/linux-imx repository
https://source.codeaurora.org/external/imx/linux-imx/tree/?h=imx_5.4.70_2.3.0

Documentation

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

Then try to debug issue using AN12631

Normal and Secure Debug for i.MX8/8X Family of Applications Processors

Best regards
igor