nrf52832 system off/ low-power mode and wakeup by gpio detecc

[jinvers]

Hello,

I am using a nRF52832 and I need to put it in low power mode with the minimum current consumption when the customer pushes the switch-off button.

I have found interesting the next case for this

https://devzone.nordicsemi.com/f/nordic-q-a/36475/nrf52832-go-system-off-low-power-mode-and-wakeup-by-gpio/140687

However, I still don't see how to specifically program the two GPIO pins I need to wake-up the system. I am using the nRF5_SDK_17.1.0 and the SES IDE environment. Do you know of any example for nRF5_SDK_17.1.0 that could better show how to program the DETECT wake-up of specific pins? Perhaps there are some examples on how to setup these pins and excuse me I have not found them. 

Thank you very much in advance.

Regards,

Joel

[Kazi Afroza Sultana]

You just need to enable the SENSE mechanism for any given GPIO by writing 0x2 or 0x3 to the SENSE field in PIN_CNF[0] (https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/gpio.html?cp=5_2_0_19_2_9#register.PIN_CNF-0). If the SENSE condition of any gpio is met the DETECT signal will wake up the system from SystemOFF. You can call nrf_gpio_cfg_sense_input() (https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/group__nrf__gpio__hal.html?cp=9_1_6_8_0_13_0_11#ga91f72be8204a892956fa5d5dd59c32b2) to enable a given sense and pull config for a given gpio.

[jinvers]

Thank you for your message. I will check it.

Regards,

Joel