/*
  Button

 Turns on and off a light emitting diode(LED) connected to digital
 pin 13, when pressing a pushbutton attached to pin 2.


 The circuit:
 * LED attached from pin 13 to ground
 * pushbutton attached to pin 2 from +5V
 * 10K resistor attached to pin 2 from ground

 * Note: on most Arduinos there is already an LED on the board
 attached to pin 13.


 created 2005
 by DojoDave <http://www.0j0.org>
 modified 30 Aug 2011
 by Tom Igoe

 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/Button
 */

// constants won't change. They're used here to
// set pin numbers:
const int buttonPin = 2;     // the number of the pushbutton pin
const int ledPin =  6;      // the number of the LED pin
const int latchPin = 9;
boolean thisState = 0;     // declare thisState as a variable and set once to zero
boolean mySwitch = 0;      // declare mySwitch as a variable and set once to zero
boolean lastMySwitchState = 0; //declare lastMySwitchState as a variable and reset to zero


// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
  pinMode(latchPin, OUTPUT);
  Serial.begin(19200);
}

void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }
  //***************************    
  //check if this switch has changed state
  thisState = digitalRead(mySwitch);
  if (thisState != lastMySwitchState)
  {  
    //update the switch state
    lastMySwitchState = thisState;  

    //"HIGH condition code"
    //switch goes from LOW to HIGH
    if(thisState == HIGH)        
    {
      //LED on pin 9 is Push ON, Push OFF
      digitalWrite(latchPin,!digitalRead(latchPin)); 
    }
}
Serial.print("mySwitch State ");
Serial.print(mySwitch);
Serial.print(" switch State ");
Serial.println(latchPin);
}