Timers interrupt lagging on nRF5340

RE: Timers interrupt lagging on nRF5340

ovrebekk — Mon, 06 Dec 2021 11:21:31 GMT

That's great news, I will close this ticket then.

The best of luck with your project 🙂

Best regards
Torbjørn

RE: Timers interrupt lagging on nRF5340

David Dabi — Mon, 06 Dec 2021 09:58:01 GMT

ovrebekk on behalf of Michal Obrembski we've checked together with him the suggestion and you are correct, the issue is with UART delays rather than Timer callback.
Thanks for the support !!!! this ticket can be resolved.

RE: Timers interrupt lagging on nRF5340

ovrebekk — Mon, 08 Nov 2021 12:03:28 GMT

I don't have any issues running your code, but I made one change to store the instance to a variable:

nrfx_timer_t my_timer = NRFX_TIMER_INSTANCE(1);

And then I just refer to this in the later calls:

nrfx_timer_init(&my_timer, &initCfg, timerEventHandler);

But if it works some times but not others I doubt this is the reason for the issue.

What happens if you toggle a LED instead of writing to the UART?

Is the problem still the same?

[quote user=""]

Then it appears that uart_irq_rx_disable also disables timer interrupt. When i do frequently rx_disable, then timer interrupt is lagging even more.

Can't really understood why disabling UART interrupt also disables Timer interrupt?

[/quote]

Could this be because the UART gets delayed rather than the interrupt?

What if you add a small delay after each time you disable and re-enable the uart RX?

k_msleep(1);

Best regards
Torbjørn

RE: Timers interrupt lagging on nRF5340

Michal Obrembski — Fri, 05 Nov 2021 09:02:31 GMT

ovrebekk, i've posted a code in first topic ;)

This is all problematic code. If you need something specific, please let me know.

RE: Timers interrupt lagging on nRF5340

ovrebekk — Fri, 29 Oct 2021 11:55:40 GMT

Hi Michal

Sorry for the missing response on our end. Håkon is currently unavailable, and I will help out with your case in the mean time.

If you are still having issues with this, are you able to share your sample with me so I can try to reproduce the issue on my end?

If you don't want to share your code in a public case just let me know, and I can make it private.

Best regards
Torbjørn

RE: Timers interrupt lagging on nRF5340

Michal Obrembski — Sun, 10 Oct 2021 19:59:07 GMT

OK, but i already provided handler in previous post:

void timerEventHandler( nrf_timer_event_t event_type, void *p_context )
{
printk("Timer called");
}

It's just a simple printk, what's wrong with that?

RE: Timers interrupt lagging on nRF5340

helsing — Wed, 18 Aug 2021 17:54:13 GMT

Hi Michal,

It looks like the interrupts are not handled properly. You could try handling the interrupt in a similar way as in this nrfx rtc sample. This is similar to nrfx_timer.

Best regards,

Håkon