topic CAN FD with RxErr in LPC Microcontrollers

CAN FD with RxErr

黎明孟 — Wed, 26 Dec 2018 15:18:22 GMT

The offical demo used for CANFD debug, the RxErr occured;

The CAN OE used for the msg monitor and the Rate change to 500K/2M; the 2 nodes connected together; No other CAN node in the network;

You can see that the data also received but with the form error; actually, sometimes report CRC error and sometimes report Stuff bit error;

It seems something wrong at the Stuff fileld or the CRC field, but i don't know how to fix it!!!

Re: CAN FD with RxErr

kerryzhou — Fri, 28 Dec 2018 03:16:03 GMT

Hi Limeng,

Please tell me your LPC chip part number, then I can help you to check the details.

What the CANFD code you are using, do you try the official code, if you also use the official code, please tell me what the code you are using?

Please also tell me what the LPC board you are using, you own designed board or the nxp official board?

Waiting for your reply!

Have a great day,
Kerry

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Re: CAN FD with RxErr

黎明孟 — Fri, 28 Dec 2018 14:42:23 GMT

Thanks Kerry,

The kit ordered from NXP the part is OM13094,uP is 54618 with CAN FD kit;

The project used also from NXP offical example "LPC5461x-CANFD-DriverAPI"-->"fd_msgobjs";

When i change the register "config.enableNonISOMode=true;" The error frame fixed！

So it seems the CANOE version can't support the ISO FD protocol.

Also many thanks!

Re: CAN FD with RxErr

kerryzhou — Sat, 29 Dec 2018 07:17:27 GMT

Hi Liming,

Thank you for your updated information.

Do you mean, when you use fd_msgobjs project directly without any modification in the CANFD driver, it has error.

But, if you modify the code :

config.enableNonISOMode=true;

It doesn't have errors.

Is it right?

If yes, i will test it on my side.

Have a great day,
Kerry

Re: CAN FD with RxErr

黎明孟 — Sat, 29 Dec 2018 14:02:50 GMT

Hi Kerry

That's right.

I think the error frame occured due to my CAN OE device is VN1630, not compatiable with ISO11898-2015 standard. and when the project change to non-iso mode, no error frame occured;

If you have the newest CAN instruments to monitor the CANFD frame, maybe no error occured even in ISO mode;

Also hope you can feedback a result for the test, thanks!