First Draft with only one GPIO usable

HIB.cpp

@@ -0,0 +1,80 @@
+#include "HIB.h"
+
+static uint8_t pin;
+static uint8_t initialState;
+static int state;
+static volatile bool debouncing;
+static ETSTimer timer;
+static unsigned long previousMillis;
+static unsigned int longPressMsec;
+void timerCallback(void *);
+void IRQ_handler();
+void onButtonPressed();
+void onButtonReleased();
+void onLongButtonPressed();
+void setConfig(uint8_t p, uint8_t initState, int longPress );
+
+
+HIB::HIB(uint8_t pin, uint8_t initialState, int longPressMsec)
+{
+	setConfig(pin, initialState, longPressMsec);
+}
+
+HIB::HIB(){
+}
+
+void HIB::configure(uint8_t pin, uint8_t initState, int longPressMsec){
+	setConfig(pin, initState, longPressMsec);
+}
+
+void setConfig(uint8_t p, uint8_t initState, int longPress ){
+	pin = p;
+	initialState = initState;
+	state = initialState;
+	debouncing = false;
+	previousMillis = 0;
+	longPressMsec = longPress;
+
+	pinMode(pin, INPUT);
+	attachInterrupt(digitalPinToInterrupt(pin), IRQ_handler, CHANGE);
+	os_timer_setfn(&timer, timerCallback, NULL);
+}
+
+void IRQ_handler(){
+	if(!debouncing){
+		debouncing = true;
+		os_timer_arm(&timer, 50, 0);
+	}
+}
+
+void timerCallback(void *){
+	debouncing = false;
+	state = !state;
+	if (state != digitalRead(pin)){
+		Serial.println("Debounce failed");
+		state = !state;
+		return;
+	}
+	if(state != initialState)
+		onButtonPressed();
+	else
+		onButtonReleased();
+}
+
+void onButtonPressed(){
+	Serial.println("Button Pressed");
+	previousMillis = millis();
+}
+
+void onLongButtonPressed(){
+	Serial.println("Long Button Pressed");
+}
+
+void onButtonReleased(){
+	Serial.println("Button Released");
+	if(millis() - previousMillis >= longPressMsec){
+		onLongButtonPressed();
+	}
+}
+
+HIB Hib;

HIB.h

@@ -0,0 +1,17 @@
+#pragma once
+#include "Arduino.h"
+extern "C" {
+#include "osapi.h"
+}
+// Human Interface Button
+class HIB {
+private:
+
+public:
+    HIB(uint8_t pin, uint8_t initialState, int longPressMsec = 5000);
+    HIB();
+    void configure(uint8_t pin, uint8_t initialState, int longPressMsec = 5000);
+};
+
+
+extern HIB Hib;