RE: I have a simple question about the timer.

schosdas — Mon, 07 Sep 2020 02:34:18 GMT

Thank you! You've been very helpful.

RE: I have a simple question about the timer.

Jørgen Holmefjord — Wed, 02 Sep 2020 08:47:11 GMT

Hi,

App_timer and nrf_drv_timer can operate simultaneously. App_timer runs off a single RTC instance for creating multiple software timer instances, while the TIMER driver can utilize any of the available HW TIMER instances.

The RTC runs off the 32.768 kHz Low-Frequency Clock, which gives much lower current consumption than the TIMERs running off the 16 MHz High-Frequency Clock. The advantage of TIMER vs RTC is that TIMERS have much better resolution (62.5 ns) than RTC (~30.5 us). For operations where timing accuracy is essential, TIMERS are preferred. For long-time task planning, etc, RTCs/app_timer are usually better.

A timer example is available in the SDK.

Best regards,
Jørge