Create SwitchRunTimeBahavior_Demo_01.ino

Created example to show how to switch button behavior at run time.

Author: lendres

examples/SwitchRunTimeBahavior_Demo_01/SwitchRunTimeBahavior_Demo_01.ino

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+/*
+	Demonstrates how to switch behavior of a button at run time.  This example uses
+	two alternating time frames.  During the first, the button will turn the LED on
+	and off.  During the second, the LED will remain on and the button will have no
+	effect.  The two modes are toggled back and forth every few seconds.
+	
+	The button should be wired such that when pressed, the "buttonPin" is
+	connected to ground.
+
+	The LED should be wired with the "ledPin" to the positive lead and the
+	negative lead should be connected to ground.  A current limiting resistor
+	should be used.
+*/
+
+#include "MomentaryButton.h"
+#include "AlwaysOnButton.h"
+
+// Change these if your button or LED are on other pins.
+int buttonPin	= 8;
+int ledPin		= 9;
+
+
+// We will access the button through a pointer.  That way we can change the button
+// behavior by changing what type of button is being pointed to.
+SimpleButton	*button;
+
+// The MomentaryButton will automatically configure the button pin.
+MomentaryButton momentaryButton(buttonPin);
+
+// Always on button.  The button pin is require to remain compatible with the base class,
+// however, it is not used by this class.
+AlwaysOnButton	onButton(buttonPin);
+
+// Used for timing and switching between the two states.
+unsigned long	intervalStartTime; 
+const int		intervalLength		= 5000;
+int				currentState;
+
+
+void setup()
+{
+	// Setup the output LED.
+	pinMode(ledPin, OUTPUT);
+	digitalWrite(ledPin, LOW);
+
+	// Set our initial state as using the momentary button.
+	button			= &momentaryButton;
+	currentState	= 0;
+
+	// Capture the start time to be used to calculate the time ellapsed.
+	intervalStartTime = millis();
+
+	// Allow printing to the serial monitor.  Provides additional information and debugging.
+	Serial.begin(9600);
+	Serial.println("Serial monitor initialized.");
+}
+
+
+void loop()
+{
+	if (millis() - intervalStartTime > intervalLength)
+	{
+
+
+		// Toggle between the two states.  In state 0, the button can turn the LED
+		// on or off.  In state 1, the LED is always on.
+		if (currentState == 0)
+		{
+			// Were in state 0, so switch to state 1.
+			button 			= &onButton;
+			currentState	= 1;
+			Serial.println("Current state: ALWAYS ON");
+		}
+		else
+		{
+			// Were in state 1, so switch to state 0.
+			button			= &momentaryButton;
+			currentState	= 0;
+			Serial.println("Current state: BUTTON");
+		}
+
+		// Reset the start time.
+		intervalStartTime = millis();
+	}
+
+	// If the button is pressed, turn the LED light on.  In state 0 (responding to the button),
+	// the actual state of the button is returned.  In state 1, on (ISPRESSED), is always returned.
+	if (button->getStatus() == ISPRESSED)
+	{
+		// Turns on LED.
+		digitalWrite(ledPin, HIGH);
+
+	}
+	else
+	{
+		// Turns off LED.
+		digitalWrite(ledPin, LOW);
+	}
+}