bt_sdc_hci_driver: SoftDevice Controller ASSERT: 52, 402

[Hayden Ball]

Given this appears to be coming from within the SoftDevice controller, are you able to advise what the following assertion would mean, please?

[   2351007] <err> bt_sdc_hci_driver: SoftDevice Controller ASSERT: 52, 402
[   2351008] <err> os: ***** HARD FAULT *****
[   2351009] <err> os:   Fault escalation (see below)
[   2351009] <err> os: ARCH_EXCEPT with reason 3

[   2351010] <err> os: r0/a1:  0x00000003  r1/a2:  0x00000000  r2/a3:  0x00008005
[   2351010] <err> os: r3/a4:  0x00000003 r12/ip:  0x21000b18 r14/lr:  0x00000000
[   2351011] <err> os:  xpsr:  0x0100001c
[   2351011] <err> os: Faulting instruction address (r15/pc): 0x0102d618
[   2351012] <err> os: >>> ZEPHYR FATAL ERROR 3: Kernel oops on CPU 0
[   2351012] <err> os: Fault during interrupt handling

[   2351014] <err> os: Current thread: 0x21004ef8 (unknown)
[   2354630] <err> os: Halting system

[Einar Thorsrud]

Hi,

Which SDK version are you using?

Edit: Which periodic advertising parameters are you using? And can you say more about the situation when you get this assert?

[Hayden Ball]

Hi Einar.

nRF Connect version 2.9.0.

static const struct bt_le_per_adv_param per_adv_params = {
    .options = 0,
    .num_subevents = 1,
    .num_response_slots = 20,
    .interval_min = 80,
    .interval_max = 80,
    .subevent_interval = 80,
    .response_slot_delay = 24,
    .response_slot_spacing = 20,
};

Unfortunately I've no helpful information about the situation - I haven't been able to reliably reproduce this, but it happens intermittently.

[Einar Thorsrud]

Hi,

We are having some problems seeing how this assert could happen. I understand reproducing is difficult, but if it is possible, it could be usefull with a sniffer trace showing what is happening when the assert happens.

Also, can you share more details of your use case and perhaps code to show what you are doing?