System ON (sleep mode) Wake on with NFC

[ricardo vasquez rossi]

Hi everybody,

I'm developing an product with :

NRF52840, V0.9.0, SDK15

I want to put the MCU in sleep mode (system on) and wake up with NFC or by timer (for example 4 hours).

I have tested the "wake_on_NFC" example in SDK 15, but the problem is the system goes power off and the NFC wake up but reseting the MCU.

Could you help me which example could help me to find the solution.?

I have used  (NRF_NFCT->EVENTS_FIELDDETECTED==1)  but iI dont know how to put it in the EVENT.

thanks in advance.

Ricardo

[Jørgen Holmefjord]

Hi,

You can use the code in this post to enable NFCT sensing and interrupts for FIELDDETECTED event. The code does not put the device into sleep, but you can do that by adding __WFE() inside while-loop in main.

Best regards,
Jørgen

[mdevil39]

Do you have made it success of wake up by timer ? I am confused  how to do this . 

[Jørgen Holmefjord]

Please post your question in a separate thread, this one is about NFC, not timers. There are multiple posts on DevZone showing how to implement timers, please use the search function.