detect wake up reason from deep sleep.

RE: detect wake up reason from deep sleep.

MaxRPEng — Tue, 11 Sep 2018 15:14:37 GMT

Thats the solution. Great thank you so much.

RE: detect wake up reason from deep sleep.

Kenneth — Tue, 11 Sep 2018 14:52:16 GMT

Likely my mistake, from the description of the register:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/power.html?cp=2_1_0_17_8_2#register.RESETREAS

"A field is cleared by writing '1' to it". So, then the procedure to clear the register is:

int32_t reset_reason = 0;
reset_reason = NRF_POWER->RESETREAS;
NRF_LOG_PRINTF("reset_reason: 0x%08x.\n",reset_reason );
NRF_POWER->RESETREAS = NRF_POWER->RESETREAS;

Make sure to write to RESETREAS before for instance softdevice is enabled.

RE: detect wake up reason from deep sleep.

MaxRPEng — Tue, 11 Sep 2018 13:00:30 GMT

Hello, thank you for your anwser. If i put this in my the top of my main.
The device hangs up.

Is there any example available?

RE: detect wake up reason from deep sleep.

Kenneth — Tue, 11 Sep 2018 12:36:24 GMT

You need to also clear the RESETREAS, else the value will be cumulative. So try with:

int32_t reset_reason = 0;
reset_reason = NRF_POWER->RESETREAS;
NRF_POWER->RESETREAS = 0; // Edit: Wrong! A field is cleared by writing '1' to it.
NRF_LOG_PRINTF("reset_reason: 0x%08x.\n",reset_reason );