How to set gpioe to low accuracy in NCS

[helen]

Excuse me:

                      I now use NCS to develop nrf52840 applications. My applications require IO events of more than 8 channels. How should I configure them.

[Stian Røed Hafskjold]

You can add a GPIO input interrupt with a callback using the following code:

#define PIN 23

void button_callback(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
{
    printk("Button pressed");
}

void main(void)
{
    const struct device *gpio_dev;
    static struct gpio_callback button_cb_data;
    
    gpio_dev = device_get_binding("GPIO_0");
    gpio_pin_configure(gpio_dev, PIN, GPIO_INPUT | GPIO_PULL_UP);
    gpio_pin_interrupt_configure(gpio_dev, PIN, GPIO_INT_EDGE_TO_INACTIVE);
    gpio_init_callback(&button_cb_data, button_callback, BIT(PIN));
    gpio_add_callback(gpio_dev, &button_cb_data);
}

To use GPIOTE PORT event instead of GPIOTE IN event, add the following to prj.conf:

CONFIG_GPIO_NRF_INT_EDGE_USING_SENSE=y