How understand who wake up from system off

RE: How understand who wake up from system off

Susheel Nuguru — Thu, 27 Oct 2016 20:36:51 GMT

@annapalu, The only things that will exit system off is when DETECT signal in the device peripheral goes high, a pin reset or a power cycle. Nothing else will make system off exit because most of the resources are powered off. In your case it most likely a configured GPIO with sense input which could cause DETECT signal when the condition on pin is true. In your reference manual read more about DETECT signal.

RE: How understand who wake up from system off

FormerMember — Thu, 27 Oct 2016 11:03:18 GMT

@annapalu : Do you have tested one of these examples? github.com/.../nrf51-powerdown-examples

RE: How understand who wake up from system off

FormerMember — Thu, 27 Oct 2016 10:58:56 GMT

@annapalu : did you were able to find the wake-up reason? If not, could you please share some more of your code? Could you also elaborate a little more on what you want to do and what is actually happening?

RE: How understand who wake up from system off

annapalu — Fri, 14 Oct 2016 15:30:32 GMT

hi alex, can you give me information, about set the gpio to go insleep please

RE: How understand who wake up from system off

annapalu — Fri, 14 Oct 2016 14:06:27 GMT

Alex, if use i clear gpio events, the system not go in power off... It give me an error.

BTN_MGR_SetWakeUp();

     nrf_gpiote_event_clear(NRF_GPIOTE_EVENTS_PORT);
     err_code = sd_power_system_off();

RE: How understand who wake up from system off

Alex — Fri, 14 Oct 2016 13:25:55 GMT

nrf_gpiote_event_clear(NRF_GPIOTE_EVENTS_PORT);

RE: How understand who wake up from system off

annapalu — Fri, 14 Oct 2016 13:13:42 GMT

sorry Alex, how i can clear the port event?

RE: How understand who wake up from system off

annapalu — Fri, 14 Oct 2016 11:46:20 GMT

I check in this documentation, but not useful. I think that some reset can be wake-up.

RE: How understand who wake up from system off

annapalu — Fri, 14 Oct 2016 10:09:41 GMT

yes, i use a nrf52.

RE: How understand who wake up from system off

Alex — Fri, 14 Oct 2016 10:08:22 GMT

Check 19.2 in here regarding events and system wakeup. From your previous posts I understand that you are using nRF52.

RE: How understand who wake up from system off

annapalu — Fri, 14 Oct 2016 10:06:16 GMT

Also, i try to read register RESETREAS for understand if a Reset is reason of wkae up. I read that the field A (RW RESETPIN) C(RW SREQ) and E RW OFF are 1.

RE: How understand who wake up from system off

annapalu — Fri, 14 Oct 2016 10:00:04 GMT

Hi Alex, wake up and curent consumption is high variable from 0.5 uA to 1.5 uA . Yes i use a gpio example to wake the system with Gpio Interrupt. Before to go in sleep mode i use this configuration to set the gpio wake up

uint32_t BTN_SetWakeUpBotton(BTN_Id_t idButton ) {
uint32_t new_sense = 0;

for (int btnIndex = 0; btnIndex < BTN_ID_STOP; btnIndex ++) { uint32_t new_cnf = NRF_GPIO->PIN_CNF[ButtonConfigTable[btnIndex].pin_no]; if(ButtonConfigTable[btnIndex].idBtn == idButton) { new_sense = GPIO_PIN_CNF_SENSE_Low; } else { new_sense = GPIO_PIN_CNF_SENSE_Disabled; }

  new_cnf &= ~GPIO_PIN_CNF_SENSE_Msk;
  new_cnf |= (new_sense << GPIO_PIN_CNF_SENSE_Pos);
  NRF_GPIO->PIN_CNF[ButtonConfigTable[btnIndex].pin_no] = new_cnf;

} return NRF_SUCCESS;

}

RE: How understand who wake up from system off

Alex — Fri, 14 Oct 2016 09:52:06 GMT

Does your system wake up straight after calling system off? What is your main source for wakeup in design? If GPIO for example then make sure that you clear events port before system off otherwise previouse signal changes on IO remembered.