RE: NRF9160 Low Power GPIO interrupt

Sigurd — Tue, 11 Feb 2020 09:55:17 GMT

Hi,

[quote userid="76764" url="~/f/nordic-q-a/57374/nrf9160-low-power-gpio-interrupt"]Is there a solution to get the GPIOTE peripheral to be used to reduce power, but to keep the ability to get only a single interrupt on a rising/falling edge?[/quote]

As of today, the Zephyr GPIO driver only support edge triggering with GPIOTE channel. Improvements on this has been has been requested.

But, if you are using these pins to wake-up from System OFF mode, it might be easier to just access the GPIO peripheral directly, configure it with sense, and then go to System OFF sleep.

Snippet:

#include <gpio.h>
#include <hal/nrf_regulators.h>
#include <hal/nrf_gpio.h>
#include <hal/nrf_power.h>



nrf_gpio_cfg_input(WAKEUP_PIN_1,NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_sense_set(WAKEUP_PIN_1,NRF_GPIO_PIN_SENSE_LOW);

lte_lc_power_off();
bsd_shutdown(); // Method to gracefully shutdown the BSD library.
nrf_regulators_system_off(NRF_REGULATORS_NS);