GpioEventManager.cpp

Go to the documentation of this file.

#include "events/GpioEventManager.h"
#include <cstdio>
#include <hardware/gpio.h>
 
#include "events/Event.h"
#include "events/EventManager.h"
#include "framework/AppContext.h"
#include "framework_config.h"
 
GpioEventManager& GpioEventManager::getInstance() {
    static GpioEventManager instance;
    return instance;
}
 
void GpioEventManager::enableInterrupt(uint pin, uint32_t edgeMask) {
     if(!handler_set){
        gpio_set_irq_callback(gpio_event_handler);
        handler_set = true;
    }
    gpio_set_irq_enabled(pin, edgeMask, true);
}
 
void GpioEventManager::disableInterrupt(uint pin) {
    gpio_set_irq_enabled(pin, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, false);
    listeners.erase(pin);
}
 
void GpioEventManager::registerCallback(uint pin, GpioCallback cb) {
    listeners[pin].push_back(cb);
}
 
void GpioEventManager::unregisterAll(uint pin) {
    listeners.erase(pin);
}
 
void GpioEventManager::gpio_event_handler(uint gpio, uint32_t events) {
    GpioEvent gpioEvent = {
        static_cast<uint16_t>(gpio),
        static_cast<uint16_t>(events)
    };
 
    // Dispatch to listeners
#if GPIO_EVENT_HANDLING & GPIO_NOTIFICATIONS
 
    auto it = listeners.find(gpio);
    if (it != listeners.end()) {
        for (auto& cb : it->second) {
            cb(gpioEvent);
        }
    }
#endif
 
    // Also send an Event to EventManager if anyone wants to subscribe
#if GPIO_EVENT_HANDLING & GPIO_EVENTS
    Event evt = Event(SystemNotification::GpioChange, gpioEvent, sizeof(GpioEvent)); // broadcast event to anyone subscribed as target isn't specified
    AppContext::get<EventManager>()->postEvent(evt); // EventManager knows whther it's an ISR or not
#endif
}