How to use external interrupt to wake up sleep mode in nrf51822

RE: How to use external interrupt to wake up sleep mode in nrf51822

Martijn — Mon, 18 Jan 2016 21:38:49 GMT

No, in system off the system is off. You need wfi or wfe (sd_app_event_wait) to do that. You can use the sense machanism to wake the CPU.

RE: How to use external interrupt to wake up sleep mode in nrf51822

adrianwong — Wed, 06 Jan 2016 10:14:29 GMT

Ya. this is the typical configuration of nordic for external interrupt. Currently, I'm using Arduino IDE as compiler. By the way, is it possible to use sd_power_system_off(); when i want my timer or RTC to keep running at the background? so fast as i know it is not possible.

RE: How to use external interrupt to wake up sleep mode in nrf51822

Alex — Wed, 06 Jan 2016 10:09:03 GMT

for sending nRF to sleep I use:

NRF_GPIOTE->EVENTS_PORT = 0; 
nrf_gpio_cfg_sense_input(WAKEUP_INPUT, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_SENSE_HIGH); 
sd_power_system_off();

RE: How to use external interrupt to wake up sleep mode in nrf51822

adrianwong — Wed, 06 Jan 2016 10:05:02 GMT

It doesn't wake up and i try to use sd_app_evt_wait() is not working

RE: How to use external interrupt to wake up sleep mode in nrf51822

Alex — Wed, 06 Jan 2016 09:55:55 GMT

So ADXL345 generates signal by shaking it but nRF doesn't wake up or ADXL345 doesn't generate signal?