RE: Timer confusion

sara — Wed, 18 May 2016 06:32:32 GMT

Hello, You mentioned that "app_timer.c" uses 32kHz RTC, does it mean I can use this library to using RTC in order to save more power? Or I have to stop using "app_timer.c" library but using only RTC to run the counter mode?

Thanks.

RE: Timer confusion

Håkon Alseth — Fri, 12 Jul 2013 10:52:00 GMT

Hi,

A timer usually holds different modes. "Counter mode" is one of these modes. What we do is that we have a Capture/Compare mode, and we emulate a counter mode by making the timer reset itself using "SHORTS" register.
You can setup any timer for the purpose you'd like. If you need good resolution, use TIMER0/1/2 (16 MHz based with prescaling options). If you need a low power timer, use the RTC (32 kHz based)

We also provide a timer library. The "app_timer" library uses the 32 kHz RTC.

Note: If you are using the S110 stack, please see the softdevice specification to see which peripherals are blocked.

Best regards Håkon