topic Re: How to detect illegal opcode in S32K1XX in S32K

How to detect illegal opcode in S32K1XX

Pratheek — Wed, 19 Oct 2022 09:41:56 GMT

How to detect ECU reset due to Illegal op code/undefined instructions. I think Usage fault exception will trigger if illegal opcode is executed. But, how to confirm the Usage fault exception is due to illgale opcode?

Re: How to detect illegal opcode in S32K1XX

danielmartynek — Thu, 20 Oct 2022 08:33:41 GMT

Hi @Pratheek,

Yes, this is a usage fault exception.

In the fault handler, read the CFSR[UNDEFINSTR] register.

Since the CM7 core is very similar to the CM4 on S32K14x in this regard, you can refer to this document/example:

https://community.nxp.com/t5/S32K-Knowledge-Base/Fault-handling-on-S32K14x/ta-p/1114447

Regards,

Daniel

Re: How to detect illegal opcode in S32K1XX

Pratheek — Wed, 26 Oct 2022 15:16:21 GMT

Hello Daniel,

Thank you veru much for your support, issue solved.

Thanks & Regards,

Pratheek