MPSL assert

RE: MPSL assert

Simon — Tue, 09 Feb 2021 09:54:22 GMT

I'm happy you found a workaround to the issue!

RE: MPSL assert

Nicolas Brunner — Fri, 05 Feb 2021 16:41:34 GMT

My workaround to this problem is to not end the timeslot when disabling the radio.
Another timer event is added 100 us after the disabling of the radio, this event end the timeslot.
This give enough time to deal if a last radio event occurs.
With this solution running tens of minutes, i saw radio event occurs after the firt timer event but they don't make MPSL assert anymore.

RE: MPSL assert

Nicolas Brunner — Fri, 05 Feb 2021 15:18:40 GMT

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.

RE: MPSL assert

Simon — Fri, 05 Feb 2021 13:16:58 GMT

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

RE: MPSL assert

Nicolas Brunner — Fri, 05 Feb 2021 10:40:31 GMT

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.

RE: MPSL assert

Simon — Fri, 05 Feb 2021 10:13:39 GMT

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

RE: MPSL assert

Simon — Thu, 04 Feb 2021 17:00:57 GMT

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

Best regards,

Simon