Timer during Zephyr Sleep

RE: Timer during Zephyr Sleep

Sigurd — Tue, 28 May 2024 15:48:29 GMT

[quote user="rmartin92"] So is there a callback function to notify us of a System Idle wakeup from sleep?[/quote]

I don't see why that would be useful in this context. It would trigger each time there is a interrupt the CPU need to process.

[quote user=""]We also are keeping a running count of seconds and synching that once a day with a modem.[/quote]

Maybe you could use a kernel timer, https://docs.zephyrproject.org/latest/kernel/services/timing/timers.html , that triggers every 24 hours, and in the timer callback, call k_uptime_get () and update your modem with that.

RE: Timer during Zephyr Sleep

rmartin92 — Mon, 27 May 2024 21:31:16 GMT

yes, We are not turn off, but using the Zephyr automatic sleep. System on Idle mention by Helmut Lord above. So is there a callback function to notify us of a System Idle wakeup from sleep?

RE: Timer during Zephyr Sleep

Sigurd — Mon, 27 May 2024 08:28:54 GMT

Hi!

[quote user="rmartin92"]Is there any callback funtion that we can use that tells us when zephyr exists sleep?[/quote]

What sleep are you referring to here? System OFF sleep, or System ON idle sleep?

RE: Timer during Zephyr Sleep

rmartin92 — Sun, 26 May 2024 19:11:55 GMT

Is there any callback funtion that we can use that tells us when zephyr exists sleep? If so we can update our clock with a call k_uptime_get.

RE: Timer during Zephyr Sleep

Sigurd — Tue, 21 May 2024 11:04:02 GMT

Hi!

If you are not entering system off, then k_uptime_get should not stop either.

RE: Timer during Zephyr Sleep

rmartin92 — Mon, 20 May 2024 17:27:21 GMT

We are using

k_uptime_get();

And associating this with the calendar time being set by the network or a cli. The sleep is the zephyr thread sleep. We are never entering system off. When we wake from this sleep we need to be sure that time is updated correctly.

RE: Timer during Zephyr Sleep

khelmutlord — Mon, 20 May 2024 17:17:33 GMT

Hello Roger,

Could you share what function call you are using to get the time? Are you using the CMSIS osTimer? There are a number of different kernel timing functions you can use, but it will depend on what power mode the part is in (I believe). docs.zephyrproject.org/.../clocks.html

Also, are you entering system off sleep or yielding/sleeping all possible threads to enter sleep?

Thanks,

Helmut Lord

RE: Timer during Zephyr Sleep

Amanda Hsieh — Fri, 17 May 2024 21:37:09 GMT

Hello,

Most of the staff is away for a long weekend in Norway, so there will be some delays in response time. Thanks for your patience.