Bus fault detected when entering function

RE: Bus fault detected when entering function

Vidar Berg — Tue, 29 Dec 2020 09:20:10 GMT

Thank you for the update. I'm glad to hear that you found the problem 🙂

RE: Bus fault detected when entering function

sjf — Mon, 28 Dec 2020 15:44:00 GMT

Thanks so much. We could identify that there was an uninitialized pointer quite close to where the pc was pointing to.

Regards

RE: Bus fault detected when entering function

Vidar Berg — Mon, 28 Dec 2020 14:54:26 GMT

Hi,

Could you please try to follow instructions provided here in the blog post to see if you can find the exact instruction that lead to the hardfault: https://interrupt.memfault.com/blog/cortex-m-fault-debug#imprecise-error-code-example? Also, maybe you have tried it already, but would it make sense to increase the stack sizes in your application, or have you already profiled the stack usage?

Best regards,

Vidar

RE: Bus fault detected when entering function

sjf — Mon, 28 Dec 2020 11:46:21 GMT

Hi, find below some extra info when Bus Fault is detected:

BFSR = 0x00000004 (IMPRECISERR = 1)