RE: nrf52832 go system off/ low-power mode and wakeup by gpio

Ars Morozov — Thu, 02 Aug 2018 12:19:09 GMT

Thank you very much!

RE: nrf52832 go system off/ low-power mode and wakeup by gpio

Simon — Thu, 19 Jul 2018 13:52:23 GMT

In order to put nrf52832 to "system OFF sleep mode" you need to call sd_power_system_off(), which puts the system to the deepest power saving mode.

The system can be woken up through a DETECT signal generated by GPIO pins, check out this link for more information about DETECT signals. Configurations of individual pins is done through the SENSE field in the PIN_CNF[n] register, and can be set by calling nrf_gpio_cfg_sense_input(...). However, system OFF will disable all peripherals except for GPIO, LPCOMP and NFC, and after waking up the system gets reset.

Another possibility is to put the system into System ON sleep mode, where the system will wake up on any event, and can be invoked by calling sd_app_evt_wait(). All the peripherals can be used and you can use GPIOTE interrupts to wake it up.

Here is a similar question:

https://devzone.nordicsemi.com/f/nordic-q-a/19859/system-off-and-gpiote

More information about System ON and System OFF:

http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fpower.html&anchor=concept

Best regards Simon Iversen

RE: nrf52832 go system off/ low-power mode and wakeup by gpio

haakonsh — Thu, 19 Jul 2018 13:30:51 GMT

See the Power Management library and Power management library API reference, as well as its source code in the SDK.