MORE GPIOS AS EVENTS

[Shariff]

Hi,

I am developing some application for that I want 12 pins as interrupt mode, but I can see only 8 pins can be configured.

Can anyone suggest me please.

Thanks, and regards.

[haakonsh]

You need to use the PORT event instead of the IN events. Then you can use any number of GPIOs. See:

EVENTS_PORT

GPIO — General purpose input/output

[Shariff]

Hi haakonsh,

In my application multiple buttons are also pressed together so these situations should be considered, and as per your suggestion if i use port events then still i can configure 8 interrupts since it has only 8 config in gpiote (0-7). If you have any code for the same then please do share it with me.

Thanks and regards.

[haakonsh]

Hey Ajmal,

The PORT event does not use GPIOTE channels at all. 

Call nrfx_gpiote_in_init() with an nrfx_gpiote_in_config_t struct where the hi_accuracy member is set to 'false'. The GPIOTE driver will now use the PORT event for the provided pin and its trigger config.

BR,
haakonsh.

[Shariff]

Hi haakonsh,

I tried as per your suggestion and i found that many pins are automatically getting triggered like Pin 0,1,2,3,11,12 etc. and also I am not able to configure more than one pin for port interrupt because it is triggering    NRF_BREAKPOINT_COND; 

uint32_t err_code;

// Initialize GPIOTE module
err_code = nrf_drv_gpiote_init();
APP_ERROR_CHECK(err_code);

nrf_gpio_cfg_input(PIN_NUMBER_1, NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_input(PIN_NUMBER_2, NRF_GPIO_PIN_PULLUP);

NRF_P0->PIN_CNF[PIN_NUMBER_1] |= (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos);
NRF_GPIOTE->INTENSET = (1 << PIN_NUMBER_1);

NRF_P0->PIN_CNF[PIN_NUMBER_2] |= (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos);
NRF_GPIOTE->INTENSET = (1 << PIN_NUMBER_2);

nrfx_gpiote_in_config_t in_config;
in_config.pull = NRF_GPIOTE_POLARITY_HITOLO;

err_code = nrf_drv_gpiote_in_init(PIN_NUMBER_1, &in_config, port_event_handler);
APP_ERROR_CHECK(err_code);

err_code = nrf_drv_gpiote_in_init(PIN_NUMBER_2, &in_config, port_event_handler);
APP_ERROR_CHECK(err_code);

NVIC_EnableIRQ(GPIOTE_IRQn);
}

BR,

Ajmal

[haakonsh]

Try this:

void port_event_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
    switch(pin)
    {
        case PIN_NUMBER_1:
            // Do stuff
            break;
        
        case PIN_NUMBER_2:
            // Do stuff
            break;
            
        default:
            // Do nothing, not interrested in any of the other pins port events
            break;
    }
}


uint32_t err_code;

// Initialize GPIOTE module
err_code = nrf_drv_gpiote_init();
APP_ERROR_CHECK(err_code);

nrfx_gpiote_in_config_t in_config;

in_config.sense = NRF_GPIOTE_POLARITY_HITOLO;
in_config.pull = NRF_GPIO_PIN_PULLUP;
in_config.is_watcher = false;
in_config.hi_accuracy = false;
in_config.skip_gpio_setup = false;

err_code = nrf_drv_gpiote_in_init(PIN_NUMBER_1, &in_config, port_event_handler);
APP_ERROR_CHECK(err_code);

err_code = nrf_drv_gpiote_in_init(PIN_NUMBER_2, &in_config, port_event_handler);
APP_ERROR_CHECK(err_code);

If you still get an error, note the file name and line number.