A bus fault has occurred on an instruction prefetch (CFSR.IBUSERR, BFAR).

RE: A bus fault has occurred on an instruction prefetch (CFSR.IBUSERR, BFAR).

moon.kim — Fri, 30 Oct 2020 09:34:25 GMT

There was an error in my source code. It was a silly question.

Thank you very much.

RE: A bus fault has occurred on an instruction prefetch (CFSR.IBUSERR, BFAR).

Vidar Berg — Fri, 30 Oct 2020 08:54:22 GMT

Are you able check what the input paramaters to memset() were when it crashed? Maybe the size input is too big and causing memset() to overflow the input buffer?

RE: A bus fault has occurred on an instruction prefetch (CFSR.IBUSERR, BFAR).

moon.kim — Fri, 30 Oct 2020 08:16:48 GMT

Hi.

Screenshots are attached.

Whenever the source code is changed, LR changes.

But the call stack is always the same.

RE: A bus fault has occurred on an instruction prefetch (CFSR.IBUSERR, BFAR).

Vidar Berg — Fri, 30 Oct 2020 07:48:35 GMT

Hi,

The bus fault is caused by the fact that the program is trying to execute code outside the valid memory range on the nRF52820 (0x2002f9ce), but we have to try trace back to what made the program jump to this address in the first place to determine a root cause. Could you post a screenshot of the call stack when the bus fault has occurred? It may show the last function call the program was executing prior to the exception.