Method attach_interrupt

libraries/AP_HAL_ChibiOS/GPIO.cpp:309–328

Attach an interrupt handler to a GPIO pin number. The pin number must be one specified with a GPIO() marker in hwdef.dat */

   must be one specified with a GPIO() marker in hwdef.dat
 */
bool GPIO::attach_interrupt(uint8_t pin,
                            irq_handler_fn_t fn,
                            INTERRUPT_TRIGGER_TYPE mode)
{
    struct gpio_entry *g = gpio_by_pin_num(pin, false);
    if (!g) {
        return false;
    }
    g->isr_disabled_ticks = 0;
    g->isr_quota = 0;
    if (!_attach_interrupt(g->pal_line,
                           palcallback_t(fn?pal_interrupt_cb_functor:nullptr),
                           g,
                           mode)) {
        return false;
    }
    g->fn = fn;
    g->isr_mode = mode;
    return true;
}

/*
   Attach an interrupt handler to ioline_t