how to implement time stamp in nrf52

[singh]

Hi,

I have nrf52 DK and sdk11. I want to implement the time using internal RTC , the clock should run if the power is off ,i'm implementing in central code ,it has to scan the beacons and send the data to UART with timestamp. Is there any example code please help me.

Regards,

Prudhvi

[Wojtek]

Internal RTC should run when power is off? how?

[Stefan Birnir Sverrisson]

Hi Prudhvi

Perhaps the System On mode is what you are asking for. In System On, all peripheral block can be enabled, including RTC. Normal operation in beacon example, as any BLE example in the SDK, is to disable the CPU by calling power_manage in the main loop. RTC will run in the background even though the CPU is disabled. Further information is found in the Power chapter in the nRF52 PS. Information in the nRF51 current consumption guide, section "Low power mode with BLE softdevice" also includes some information about System On low power mode that also applies to the nRF52.