GPIO Interrupt Low Accuracy Mode not Working

[Ameer Usman]

Ok I am using GPIO interrupt and want absolute power saving but when I set the GPIO_INTERRUPT_HIGH_ACCURACY to true it works fine but when I set GPIO_INTERRUPT_HIGH_ACCURACY to false (low accuracy with power saving) the I receive only one interrupt and then my LED stays on (like no other interrupt was detected)

What could be the possible issues in low accuracy mode?

#define GPIO_INTERRUPT_HIGH_ACCURACY true

static void gpio_init(void)
{
    ret_code_t err_code;

    err_code = nrf_drv_gpiote_init();
    APP_ERROR_CHECK(err_code);

    nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);

//    err_code = nrf_drv_gpiote_out_init(PIN_OUT, &out_config);
//    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_gpiote_out_init(PIN_LED, &out_config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_gpiote_out_init(PIN_BUZZER, &out_config);
    APP_ERROR_CHECK(err_code);



    nrf_drv_gpiote_in_config_t in_1_config = GPIOTE_CONFIG_IN_SENSE_LOTOHI(GPIO_INTERRUPT_HIGH_ACCURACY); // previous: GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
    in_1_config.pull = NRF_GPIO_PIN_PULLDOWN;

    err_code = nrf_drv_gpiote_in_init(PIN_INT_1, &in_1_config, int_1_pin_handler); //Creating Interrupt Handler
    APP_ERROR_CHECK(err_code);

    nrf_drv_gpiote_in_event_enable(PIN_INT_1, true);  //Enabling Interrupt for Pin
}

[Kenneth]

Are you using "\nRF5_SDK\examples\peripheral\pin_change_int" as-is here? It seems to work on an nRF52-DK I have here when I change to nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false);

Kenneth

[Ameer Usman]

When I use:

GPIOTE_CONFIG_IN_SENSE_LOTOHI(false);

It keeps on giving interrupts even though there is no low to high pulse. But when I set the condition to true it works just fine.

[Ameer Usman]

Kenneth, can you confirm with the development team that is there is a difference in how GPIOTE_CONFIG_IN_SENSE_HITOLO(false); works and how GPIOTE_CONFIG_IN_SENSE_LOTOHI(false);

As I believe on using GPIOTE_CONFIG_IN_SENSE_HITOLO(false); it is working fine on low accuracy.

Also can you try these on your end performing HITOLO and LOTOHI.

[Kenneth]

Did you try my suggestion? Do note that the example is setup to toggle the output on pin change, so this means that the LED is turned ON once when button is pressed.

[Ameer Usman]

Bump.