Custom timer in nRF secure bootloader

RE: Custom timer in nRF secure bootloader

Jared — Tue, 11 Oct 2022 12:10:47 GMT

Hi,

The app timer is based on the RTC1 peripheral. The difference between RTC and TIMER is the that the latter is based on the more accurate HCLK vs the former which is based on the LFCLK. The former draws significantly more current as well.

regards

Jared

RE: Custom timer in nRF secure bootloader

Louis_263 — Mon, 10 Oct 2022 16:20:46 GMT

Hi Torbjorn,
thanks for your answer.
I think that using the app_timer library takes the most flash memory, right? I would like to choose the method that takes up less memory, so probably one of the hardware timers.

Louis

RE: Custom timer in nRF secure bootloader

ovrebekk — Fri, 07 Oct 2022 11:11:17 GMT

Hi Louis

For clarity, do you want to use an app_timer, or a dedicated TIMER or RTC peripheral?

If the app_timer library is used you can assign as many timers as you want, only limited by available memory.

Using a dedicated TIMER or RTC module is also an option, but then you are limited to the number of hardware peripherals available.

If you are using the nRF52820 you should be able to use TIMER2, TIMER3 or RTC2 if you want.

Best regards
Torbjørn