Getting the System Uptime

[JordanK]

I have an application where I need to get the number of seconds that the chip has been running. It seems like it should be possible with the "clock" API, but all clock examples seem to have been removed from the SDK as of v13, and the `nrf_clock` content seems to have been moved to `legacy`.

Are there any examples available of getting the current system "uptime" using current (non-legacy) code from v17.1.0?

[Einar Thorsrud]

Hi,

There is nothing in the SDK that gives you a monotonic uptime counter of of the box. However, you can do a small change to the app_timer2 implementation to access it's internal 64 bit timer as explained in this post.

[JordanK]

Thanks Einar Thorsrud . I'll take a look at that.

In the time since I posted this question, we've actually moved to the nRF Connect SDK. Are you familiar with any way to achieve the same in nRF Connect?

[Einar Thorsrud]

Hi,

In the nRF Connect SDK you get this from the Zephyr kernel, for instance with k_uptime_get() which gives you a 64 bit integer with the uptime in milliseconds. See Kernel Timing in the documentation for details.