topic Re: MRCANHUBK344 FLEXCAN PROBLEM in S32K

MRCANHUBK344 FLEXCAN PROBLEM

vinmotion — Thu, 22 Jan 2026 00:57:47 GMT

Hello Experts , im using board MRCANHUB K344 but got problem cannot receive data in Logic analyzer although turn on pin STB and EN . Then connect yellow and white cable to logic analyzer. Hopefully you can check my zip test program where's wrong, and do i need to use the Drone Can term provided with MRCANHUBK344

Re: MRCANHUBK344 FLEXCAN PROBLEM

PetrS — Thu, 22 Jan 2026 11:25:18 GMT

Hi,

the usage of Siul2_Dio_Ip_WritePin is wrong. You should have

or if pin labels are defined in Pins tool you can use

If you are connecting just logic analyzer, then the termination (e.g. Drone Can term) is needed otherwise no CAN message will be seen. Moreover as logic analyzer does not ACK message it will be sent repeatedly and you never pass while statement for checking transfer. Also with TX polling mode used you need to call FlexCAN_Ip_MainFunctionWrite repeatedly. It can be used as

Finally, do not use FIRC as CAN protocol clock, rather select FXOSC or system clock.

With above changes and terminated bus I see this one using analyzer

BR, Petr

Re: MRCANHUBK344 FLEXCAN PROBLEM

vinmotion — Thu, 22 Jan 2026 12:35:38 GMT

Thank you Sir, but after config like you said above i still got can error, can you please check that is this wiring correct , i connect can0A to Logic and can0B with drone can term... it would be helpful if i can see how you wiring test with MRCANHUBK344

Re: MRCANHUBK344 FLEXCAN PROBLEM

PetrS — Thu, 22 Jan 2026 13:26:49 GMT

Hi,

I used the same connection. With just Saleae logic connected I see CAN message still, as there is no ACK, no CAN node connected.
With PCAN tool connected, I see message transmitted each 200ms

In the code I overlooked ";" on while loop

BR, Petr