Wake up from system off using GPIO

[Oliviertl]

Hi,

i am trying to wake up the nrf52832 from system off with a gpio interrupt.

When the signal on my gpio pin 28 goes from Hi to Lo, i trigger a callback function in which i set the nrf52832 to system off. When the signal on the pin goes from Lo to Hi, it needs to wake up the chip.

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I am using the GPIOTE driver :

 // Init gpiote driver
 err_code = nrf_drv_gpiote_init();
 APP_ERROR_CHECK(err_code);

 nrf_drv_gpiote_in_config_t config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false);
 
 err_code = nrf_drv_gpiote_in_init(28, &config, on_power_low);
 APP_ERROR_CHECK(err_code);

 nrf_drv_gpiote_in_event_enable(28, true);

Right now, the chip can't wake up. Am i missing something ?

Note: When i push my button (wich is another GPIO configured with the GPIOTE driver, it wakes up the chip).

[Tizana]

i have the same problem and unfortunately we didn't have any answer.

but i did some try and i notice that when i add this code line the input PIN 28 will woke up the nrf.

nrf_gpio_cfg_sense_input(28, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_SENSE_HIGH);

the problem is when you are in system off and the pin 28 goes from Lo to Hi the nrf won't execute the callback function which you called on_power_low() but the system will reset and start executing from the beginning of the main file.

unfortunately i didn't found any information about how to wake up the nrf, i had to struggle and looking for many example to find out this line to add in order to wake up the nrf