How to get milliseconds elapsed in a fast, simple method - without APIs.

RE: How to get milliseconds elapsed in a fast, simple method - without APIs.

kobyfr — Sun, 14 Apr 2019 12:15:15 GMT

see my answer on how to activate the time-stamp output in NRF logs, here.

I guess you can dive into the log code responsible for formatting the time-stamp,and see how they extract the millisecond portion of it.

RE: How to get milliseconds elapsed in a fast, simple method - without APIs.

RK — Fri, 13 Apr 2018 14:01:04 GMT

well SysTick only counts when the CPU is running, so in any mode you'd usually want to use a Nordic chip in, which is 'sleep as much as possible', it's not ticking fairly often. I'm assuming that's what the OP is referring to although if they are doing these measurements in code they can be sure is constantly executing .. SysTick will be counting, although possibly at the internal RC frequency.

RE: How to get milliseconds elapsed in a fast, simple method - without APIs.

MartinBL — Fri, 13 Apr 2018 13:21:13 GMT

Hi,

I haven't heard about any issues with the SysTick and nRF52840. Do you mind linking to the posts you are referring to?

Anyway, would it be possible to simply start a timer or RTC when you receive your timestamp and then use it exactly as you would with the systick?