RE: HCI UART simultaneous advertising and scanning MPU fault

Jared — Thu, 08 Sep 2022 01:32:47 GMT

Another update!

So far, no faults on the nRF52. Did get one on the nRF9160 side:

[19:48:18.956,115] [1;31m<err> os: Exception occurred in Secure State[0m
[19:48:18.956,115] [1;31m<err> os: ***** HARD FAULT *****[0m
[19:48:18.956,115] [1;31m<err> os: Fault escalation (see below)[0m
[19:48:18.956,115] [1;31m<err> os: ***** BUS FAULT *****[0m
[19:48:18.956,146] [1;31m<err> os: Precise data bus error[0m
[19:48:18.956,146] [1;31m<err> os: BFAR Address: 0x50008158[0m
[19:48:18.956,146] [1;31m<err> os: r0/a1: 0x2002cac1 r1/a2: 0x00000000 r2/a3: 0x00000001[0m
[19:48:18.956,176] [1;31m<err> os: r3/a4: 0x00000000 r12/ip: 0x0000f9c0 r14/lr: 0x0002db4f[0m
[19:48:18.956,176] [1;31m<err> os: xpsr: 0x21000000[0m
[19:48:18.956,176] [1;31m<err> os: Faulting instruction address (r15/pc): 0x0002db38[0m
[19:48:18.956,207] [1;31m<err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0[0m
[19:48:18.956,237] [1;31m<err> os: Current thread: 0x2000dd48 (BT TX)[0m

Looks like it happened in the BT TX thread

I tracked it down again using addr2line and got essentially the same places related to the net buffer

app on  final-tweaks [$!+] 
❯ arm-none-eabi-addr2line -e nrf9160/build/zephyr/zephyr.elf 0x0002db38
/Users/jaredwolff/Git/broodminder/zephyr/drivers/bluetooth/hci/h4.c:435

app on  final-tweaks [$!+] 
❯ arm-none-eabi-addr2line -e nrf9160/build/zephyr/zephyr.elf 0x0002db4f
/Users/jaredwolff/Git/broodminder/zephyr/include/net/buf.h:2072

I'm going to increase the ISR_STACK_SIZE on the nRF91 side as well. Let me know if you have any other insights/suggestions.

RE: HCI UART simultaneous advertising and scanning MPU fault

Jared — Mon, 29 Aug 2022 12:33:26 GMT

I'll give it a try. Thanks Sigurd

RE: HCI UART simultaneous advertising and scanning MPU fault

Sigurd — Mon, 29 Aug 2022 12:24:43 GMT

Hi,

[quote user=""]

Any suggestions would be greatly appreciated.

[/quote]

Could you try to double CONFIG_ISR_STACK_SIZE , and see if it fixes the issue ?