S32KのトピックRe: S32K3 CANFD support 8Mbps Demo example code?

S32K3 CANFD support 8Mbps Demo example code?

CherryDeng — Wed, 12 Mar 2025 09:13:01 GMT

Could you help share the 8Mbps CANFD Demo example code in S32K3? Thanks.

Re: S32K3 CANFD support 8Mbps Demo example code?

PetrS — Wed, 12 Mar 2025 12:59:27 GMT

Hi,

as far as I know there is no such example directly, but you can reuse any existed one, let say https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K344-FlexCAN-Ip-TX-RX-EnhanceRXFIFO-test-S32DS3-4/ta-p/1536225 and modify CAN bitrate accordingly using below tool:
https://community.nxp.com/t5/MPC5xxx-Knowledge-Base/MPC5xxx-S32Kxx-LPCxxxx-CAN-CAN-FD-bit-timing-calculation/ta-p/1119319
However question could be, do you have CAN transceiver which is capable to run on such rates? What is a board you have?

BR, Petr

Re: S32K3 CANFD support 8Mbps Demo example code?

CherryDeng — Thu, 13 Mar 2025 01:10:18 GMT

Petr,

We use S32K358+ TJA1462 CANFD.

Re: S32K3 CANFD support 8Mbps Demo example code?

PetrS — Thu, 13 Mar 2025 12:39:00 GMT

ok, do not have such combination, but I modified my old demo for MRCANHUB344, which have TJA1463. So I added test code for FlexCAN2 using 1M/8M bitrate and it is working well with PCAN USB Pro FD connected.

You can refer to that code.

BR, Petr

Re: S32K3 CANFD support 8Mbps Demo example code?

CherryDeng — Fri, 14 Mar 2025 01:14:59 GMT

Petr,

Thanks for your demo, we test the CANFD data bit waveform, but it is not 8Mbps, it is 3.205Mbps. Could you help check it?

Re: S32K3 CANFD support 8Mbps Demo example code?

CherryDeng — Fri, 14 Mar 2025 05:42:08 GMT

Petr：

Another question, how many S32K3 CANFD frames can be sent and received per second by PCAN View?

Re: S32K3 CANFD support 8Mbps Demo example code?

PetrS — Fri, 14 Mar 2025 08:13:58 GMT

Hi,

this is my measurement on CAN TX line, I see expected signal

Single pulse in data phase is 125ns, that corresponds to 8Mbps rate.
If you see timing issues, check CAN PE clock and CAN bit timing setting.

How many S32K3 CANFD frames can be sent and received per second by PCAN View?
An answer requires to have more inputs, bitrates for both nominal/data phases, payload.
You can see above a message with 1M/8M and 64byte payload take about 110us.

BR, Petr