Workflow

Define the interrupt callback function in the application:

static void eic_callback(void)
{
    /* Check if EIC push button line interrupt line is pending. */
    if (eic_line_interrupt_is_pending(EIC, GPIO_PUSH_BUTTON_EIC_LINE)) {
        eic_line_clear_interrupt(EIC, GPIO_PUSH_BUTTON_EIC_LINE);
        bToggle = 1;
    }
}

Enable EIC module:

eic_enable(EIC);

Configure EIC line with specified mode:

eic_line_set_config(EIC, GPIO_PUSH_BUTTON_EIC_LINE, &eic_line_conf);

Set the EIC callback function and enable EIC interrupt.

eic_line_set_callback(EIC, GPIO_PUSH_BUTTON_EIC_LINE, eic_callback,
GPIO_PUSH_BUTTON_EIC_IRQ, 1);

Enable EIC line:

eic_line_enable(EIC, GPIO_PUSH_BUTTON_EIC_LINE);