update

app/utils.cpp

@@ -73,3 +73,32 @@ int Rssi2Quality(sint8 rssi)
 	else
 		return 4;
 }
+
+Debounce::Debounce() : state(0xFF) {}
+Debounce::Debounce(bool signal) { init(signal); }
+void Debounce::init(bool signal)
+{
+	if(signal)
+		state = 0xFF;
+	else
+		state = 0x00;
+}
+
+int8_t Debounce::debounce(bool signal)
+{
+	const uint8_t current = state & UPPER;
+	const uint8_t history = (state << 1) & LOWER;
+
+	state = current | history | signal;
+
+	// Events are triggered when the history is saturated
+	// with the opposite of the active switch state.
+	// As a result, the events are guaranteed to alternate.
+
+	switch (state) {
+	    case UPPER: state = 0x00; return -1; // LOW/False (falling edge)
+	    case LOWER: state = 0xFF; return 1; // HIGH/True (rising edge)
+	}
+
+	return 0;//state & UPPER;
+}