topic Re: Is there a register that indicates LIN bus off? in S32K

Is there a register that indicates LIN bus off?

Kang111 — Thu, 06 Mar 2025 07:27:58 GMT

Hi?
I'm using S32K144.
Is there a register that indicates LIN bus off?
Or if you have any examples related to this, please let me know.

danielmartynek — Thu, 06 Mar 2025 12:45:45 GMT

What do you mean by the BUS OFF?

The LIN bus is pulled to VBAT, so do you mean the bus is OFF if the bus is recessive for an some time?

Thanks,

Daniel

Kang111 — Fri, 07 Mar 2025 00:17:53 GMT

The LIN bus off state means that an error has occurred and normal communication is no longer possible.

It also means that the LIN connection has been disconnected in hardware!

danielmartynek — Fri, 07 Mar 2025 14:21:22 GMT

There is no such register.

There is a LIN Tranceiver between the LIN BUS and the LPUART module of the S32K144.

The LPUART HW module is managed by the RTD LIN Driver / LIN Stack that can detect errors.

Detection of such a BUS OFF would need to be implemented in the user code.

Regards,

Daniel