i.MX ProcessorsのトピックRe: flexcan issue

flexcan issue

aksh9354 — Tue, 09 Mar 2021 05:49:38 GMT

hello, I am using i.mx8qm mek for adas project. when the board sent the first message on can bus, the bus is going in off state if another node send the first message the system is working fine

log files

error getting is

normal can status

can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 10
link/can promiscuity 0
can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0
bitrate 500000 sample-point 0.875
tq 50 prop-seg 17 phase-seg1 17 phase-seg2 5 sjw 1
flexcan: tseg1 2..64 tseg2 1..32 sjw 1..32 brp 1..1024 brp-inc 1
flexcan: dtseg1 1..39 dtseg2 1..8 dsjw 1..8 dbrp 1..1024 dbrp-inc 1
clock 40000000numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

thanks & regards

Re: flexcan issue

igorpadykov — Tue, 09 Mar 2021 07:26:41 GMT

Hi aksh9354

in nxp linux releases flexcan is used by m4, so necessary to perform steps below:

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/System-Controller-Firmware-101-Resource-management-service/ta-p/1123227

Also please try latest nxp linux releases described on

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX?tab=In-Depth_Tab

Best regards
igor

Re: flexcan issue

aksh9354 — Wed, 10 Mar 2021 05:14:07 GMT

The device tree would still need to be modified to configure the pads and FlexCAN resources.

as per the above line mentioned in the modification of default device configuration which modification we need to do in the device tree and what modification we need to do

Re: flexcan issue

aksh9354 — Wed, 10 Mar 2021 09:38:15 GMT

hello,

the mentioned step is already done, but the issue is still there .

issue only from i.mx side while initiating the communication.

if the first message sends by the board that time bus is going in off state.

Re: flexcan issue

igorpadykov — Wed, 10 Mar 2021 10:39:54 GMT

since you are using not default configuration and changed sources, for

helping with this issue please proceed with help of NXP Professional Services:
https://contact.nxp.com/new-prof-svcs-sw-tech

Best regards
igor