Exiting Sleep mode via GPIO interrupt

RE: Exiting Sleep mode via GPIO interrupt

Mike Austin (LPI) — Tue, 26 Apr 2022 22:56:53 GMT

Hi Amanda,

Great, that makes sense. Thanks for the explanation

Regards,

Mike

RE: Exiting Sleep mode via GPIO interrupt

Amanda Hsieh — Fri, 22 Apr 2022 07:40:29 GMT

Hi Mike,

GPIO wakeup from system OFF uses the GPIO SENSE event. While normally in system ON idle, the gpio interrupt is generated by GPIOTE IN event which does not work in system OFF. Therefore, the function gpio_pin_interrupt_configure_dt will not work in the sleep mode because that uses the GPIOTE IN event.

-Amanda

RE: Exiting Sleep mode via GPIO interrupt

Mike Austin (LPI) — Thu, 21 Apr 2022 23:10:46 GMT

Hi Amanda,

Thanks, but if you read my original post, you'll see I have been using that example, and that API. My question pertains to why I need to essentially configure the GPIO for "normal" interrupts using one API, and then reconfigure it again for "exit sleep mode" interrupts using a different API.

Can I configure the API to trigger both types of interrupts with one API? Or do I have to call the:

nrf_gpio_cfg_sense_set(DT_GPIO_PIN(DT_NODELABEL(button0), gpios), NRF_GPIO_PIN_SENSE_LOW);

API just prior to going into sleep mode so that the GPIO will trigger it out of sleep mode, then call the:

gpio_pin_interrupt_configure_dt(&sml_strike,GPIO_INT_EDGE_TO_ACTIVE);

API to configure the GPIO to trigger my ISR within my code when its operating normally?

Thanks and regards,

Mike

RE: Exiting Sleep mode via GPIO interrupt

Amanda Hsieh — Thu, 21 Apr 2022 08:34:11 GMT

Hi,

To wake up from the sleep mode (system off), see the correct settings in https://github.com/nrfconnect/sdk-zephyr/blob/a4edab554f67590a89703067af703c7996604562/samples/boards/nrf/system_off/src/main.c#L61-64 :

nrf_gpio_cfg_input(DT_GPIO_PIN(DT_NODELABEL(button0), gpios), NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_sense_set(DT_GPIO_PIN(DT_NODELABEL(button0), gpios), NRF_GPIO_PIN_SENSE_LOW);

Regards,
Amanda