SDK17 timestamp issue: clean time auto

RE: SDK17 timestamp issue: clean time auto

Kenneth — Wed, 02 Sep 2020 07:48:59 GMT

Do you have an app_timer running here or are all stopped? I guess you need an app_timer running.

Kenneth

RE: SDK17 timestamp issue: clean time auto

Jack Wang — Tue, 01 Sep 2020 01:52:29 GMT

Dear Kenneth,

Thanks for your reply. Yes, if set USE_CYCCNT_TIMESTAMP_FOR_LOG = 0 ,the time is OK at the beginning.

Then,another issue comes out. I use my phone send '0' and '1' to nRF52 very slowly after connect, you can see them in below.But the time is stopped, no matter how many times I send.

After that, I disconnect nRF52, and re-connect it. The time runs(it runs ,but it is not right, the time runs very slowly).

Then, the time stopped again : I use my phone send '0' and '1' to nRF52 very slowly, and the time is not change.

What is the reason of it? How can we fix it?

Thank you very much!

Best regards,

Jack Wang

RE: SDK17 timestamp issue: clean time auto

Kenneth — Mon, 31 Aug 2020 11:56:13 GMT

Hi,

The CYCCNT seems to overflow after 2^32 / 64MHz = 67,108seconds. You likely will need to use app_timer here by:

USE_CYCCNT_TIMESTAMP_FOR_LOG 0

Best regards,
Kenneth