RE: what's the differences between timer and work queue?

kfcube — Fri, 10 Nov 2023 13:38:21 GMT

I see. thanks.

RE: what's the differences between timer and work queue?

Einar Thorsrud — Fri, 10 Nov 2023 13:11:32 GMT

Hi,

A work queue is a way to queue work to be done at a later point in a different thread, with or without a delay. Read more under Workqueue Threads.

A zephyr timer is a mechanism to measure time, that threads can wait for or check, and you can have an expiry function that runs (as an interrupt). There are also other Zephyr API that relate to time, like k_sleep(). Read more under Kernel Timing and more specifically, Timers.

So while both can relate to time, they are different concepts. There are often many ways to achieve the same end goal, so there are times where you could just as well use one or the other mechanism (and others, where one is the only sensible or even possible).