S32 Design StudioのトピックRe: S32k144 will support CANFD with 5000kbps?

S32k144 will support CANFD with 5000kbps?

sreevishakhkp — Tue, 06 Aug 2019 12:26:41 GMT

I need to generate CAN FD message with 5000kbps with s32k144. Tried by modifying the sample code which is configured at 500kbps.CAN FD works with 500kbps but not with any other higher bit rates.Please let me know any other changes to be done.

Re: S32k144 will support CANFD with 5000kbps?

jorge_a_vazquez — Thu, 08 Aug 2019 20:02:39 GMT

Hi Sreevishakh kp

The module by itselft is capable of supporting 5Mbps, for this scenario you would need to use an external oscillator of more than 30MHz and use a setup of the module for the correct time configuration. Our evaluation board uses a osc of 8MHz, so with our EVB it is not possible to achive this baudrate.

Regardless of this, you would need a transciver capable of that frequency, and also consider that you sampling point will decrease.

Have a great day,
TIC

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Re: S32k144 will support CANFD with 5000kbps?

sreevishakhkp — Mon, 12 Aug 2019 09:37:00 GMT

Hi Jorge,

Thanks for your replay.

From flexCan component clock configuration its showing at 40MHz external clock only it will configure bit rate to 5000Kbps.Is it possible to use internal clock sources.

Re: S32k144 will support CANFD with 5000kbps?

jorge_a_vazquez — Mon, 12 Aug 2019 23:35:28 GMT

Hi Sreevishakh kp

The oscillator clock should be selected whenever a tight tolerance (up to 0.1%) is required in the CAN bus timing. The crystal oscillator clock has better jitter performance than the peripheral clock.

Regards.

Jorge Alcala

Re: S32k144 will support CANFD with 5000kbps?

sreevishakhkp — Tue, 13 Aug 2019 04:21:25 GMT

Hi Jorge,

The CAN configuration shows only one Bit rate setting .As CAN FD supports different bit rates for data and Arbitration field,where I can set different bit rates?

Thanks in Advance,

Vishakh

Re: S32k144 will support CANFD with 5000kbps?

jorge_a_vazquez — Wed, 14 Aug 2019 15:59:25 GMT

Hi Sreevishakh kp

If you scroll down in that field, you can see the data phase too:

Regards

Jorge Alcala

Re: S32k144 will support CANFD with 5000kbps?

sreevishakhkp — Fri, 16 Aug 2019 04:18:56 GMT

Thanks a lot Jorge

Re: S32k144 will support CANFD with 5000kbps?

sreevishakhkp — Fri, 16 Aug 2019 04:23:33 GMT

Can you suggest crystal oscillator part number suitable for generating 5 Mbps baud rate please.

Re: S32k144 will support CANFD with 5000kbps?

Andy_Pu — Fri, 24 Jun 2022 09:06:58 GMT

Hi,

Sorry to bother you. I am a complete novicea and my boss keep telling me that if I can not let the CANFD communication run at 2Mhz with osc of 8MHz and then it will be my problem.But I thought that it at least need an osc of 12MHz.So can you just tell me how fast can the CANFD run with osc of 8MHz?I'll be apreciate.