MPSL assert

[Nicolas Brunner]

Hello, i'm using NCS 1.4.99 with a nRF5340 and i'm trying to use BLE and radio synchronization in the network core.
My code run can run minutes without problem but sometime it crash unexpectedly with the following error message:
mpsl_init: MPSL ASSERT: 112, 2214
The error code give the file and the line number but it doesn't help without the source code of the MPSL library.
Would it be possible to know more about the cause of this assertion ?

Fullscreen err messages.txt Download

<err> mpsl_init: MPSL ASSERT: 112, 2214
<err> os: ***** HARD FAULT *****
<err> os:   Fault escalation (see below)
<err> os: r0/a1:  0x00000003  r1/a2:  0x2100bda8  r2/a3:  0x00000000
<err> os: r3/a4:  0x00000003 r12/ip:  0x00000000 r14/lr:  0x010203cf
<err> os:  xpsr:  0x41000018
<err> os: Faulting instruction address (r15/pc): 0x01026e3e
<err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
<err> os: Fault during interrupt handling
<err> os: Current thread: 0x21001b60 (unknown)
<err> os: Halting system

[Simon]

I've asked for help internally about this assert and waiting for a reply. I'll keep you updated.

Best regards,

Simon

[Simon]

The assert might be caused by not cleaning up the RADIO after using a timeslot. Try doing that, and see if it still appears

[Nicolas Brunner]

Thanks for this information.
My cleaning code come from nRF5-ble-timesync-demo and do the following :
NRF_RADIO->TASKS_DISABLE = 1;
NRF_RADIO->INTENCLR      = 0xFFFFFFFF;
Is the cleaning enough or do i need to clear more registers ?
I will also try to check if this cleaning code is always called when the timeslot is expiring.

[Simon]

Try running NRF_RADIO->POWER = 0 . That cleans up all RADIO registers, and will also clear all pending interrupts.

[Nicolas Brunner]

I have tried what you say but it didn't help.
I have identified that the issue was coming when I'm in the MPSL_TIMESLOT_SIGNAL_TIMER0 callback to end the radio (it's in rx just before) but just before disabling the radio, a frame is finished to be received (saw it by mapping NRF_RADIO_EVENT_END to a GPIO).
At the end of MPSL_TIMESLOT_SIGNAL_TIMER0, I return to schedule another timeslot and so i'm unable to manage the radio event because the timeslot is ended.
I suppose the end of reception event is then managed by the MPSL and assert because it's outside any timeslot.