// Matic Subelj
// 13.9
.2012

// This code is designed to run a sound sensor and a laser sensor. 
// Both of these sensors are used to trigger a flash.  
// It should be easy to add additional sensors if you want, depending on the type of your Arduino.

// The threshhold values for the different triggers with potentiometer control.
// These may need to be changed depending on evironment and sensors being used.
// Using PRINT_MESSAGES can help determine the correct value for these.
#define LASER_THRESHHOLD 20 + analogRead(potPin)
#define SOUND_THRESHHOLD 100 + analogRead(potPin2)

// This prints messages to the serial port.  This is good to enable while determining
// the threshholds for your trigger, these communications are very slow and
// when using these sensors to actually take pictures this should be turned off.
#define PRINT_MESSAGES

// The digital pins being used
#define CAMERA_FLASH_PIN 4
#define LASER_PIN 5

// The analog pins being used
#define LASER_TRIGGER_ANALOG_PIN 5
#define SOUND_TRIGGER_ANALOG_PIN 1

// this constant won't change:
const int buttonPin = 11;    // the pin that the pushbutton is attached to
const int buttonPin2 = 3;    // the pin that the pushbutton2 is attached to
const int ledPin = 13;       // the pin that the LED is attached to
const int potPin = A2;        // the pin that the Potentiometer for Laser trigger threshhold is attached to
const int potPin2 = A3;       // the pin that the Potentiometer for Sound trigger threshhold is attached to

// Variables will change:
int buttonPushCounter = 0;   // counter for the number of button presses
int buttonState = 0;         // current state of the button
int lastButtonState = 0;     // previous state of the button
int button2State = 0;         // current state of the button
int lastButton2State = 0;     // previous state of the button
boolean button2_mode = false;

void setup()
{
  // initialize the button pin as a input:
  pinMode(buttonPin, INPUT);
  pinMode(buttonPin2, INPUT);
  // initialize the LED as an output for armed/disarmed status light:
  pinMode(ledPin, OUTPUT);
  // initialize FLASH trigger pin as an output:
  pinMode(CAMERA_FLASH_PIN, OUTPUT);
  digitalWrite(CAMERA_FLASH_PIN, LOW);
  pinMode(LASER_PIN, OUTPUT);
  digitalWrite(LASER_PIN, LOW);
  digitalWrite(LASER_PIN, LOW);


#ifdef PRINT_MESSAGES
  Serial.begin(9600); // open serial
#endif
}

void loop()
{
  // PushButton is used to enable/disable the rest of the code so you can prepare the DSLR rig.   
  // read the pushbutton input pin:
  buttonState = digitalRead(buttonPin);
  // compare the buttonState to its previous state
  if (buttonState != lastButtonState) {
    // if the state has changed, increment the counter
    if (buttonState == HIGH) {
      // if the current state is HIGH then the button
      // wend from off to on:
      buttonPushCounter++;
      Serial.println("on"); 
      if (buttonPushCounter % 2 != 0) 
      {
        if(button2_mode)
        {
          Serial.println("B1 Pressed turning off laser.. switchin to sound"); 
          digitalWrite(LASER_PIN,LOW);   
        } else
        {
          Serial.println("B1 Pressed turning off sound.. switchin to laser");
          digitalWrite(LASER_PIN,HIGH);
        }
      }
    } 
    else {
      // if the current state is LOW then the button
      // wend from on to off:
      Serial.println("off"); 
    }
  }
  // save the current state as the last state, 
  //for next time through the loop
  lastButtonState = buttonState;

  button2State = digitalRead(buttonPin2);
  // compare the buttonState to its previous state
  if (button2State != lastButton2State) {
    // if the state has changed, increment the counter
    if (button2State == HIGH) 
    {
      Serial.println("button2 pressed. switchin mode.."); 
      button2_mode = !button2_mode;
        if(button2_mode)
        {
          Serial.println("B2 Pressed turning off laser.. switchin to sound"); 
          digitalWrite(LASER_PIN,LOW);   
        } else
        {
          Serial.println("B2 Pressed turning off sound.. switchin to laser");
          digitalWrite(LASER_PIN,HIGH);
        }
    }
  }
  // save the current state as the last state, 
  //for next time through the loop
  lastButton2State = button2State;

  
  // turns on the LED every four button pushes by 
  // checking the modulo of the button push counter.
  // the modulo function gives you the remainder of 
  // the division of two numbers:
  if (buttonPushCounter % 2 == 0) {
    digitalWrite(ledPin, HIGH);
  } else {
   digitalWrite(ledPin, LOW);
  int soundVal;
  int laserVal;

  ////////////////////////////////////////////////////////////
  // SOUND TRIGGER
  ////////////////////////////////////////////////////////////
if(button2_mode)
{
    soundVal = analogRead(SOUND_TRIGGER_ANALOG_PIN);
    if (soundVal > SOUND_THRESHHOLD)
    {
       digitalWrite(CAMERA_FLASH_PIN, HIGH);
  #ifdef PRINT_MESSAGES
       Serial.println("Flash Triggered!!!");
  #endif
       delay(100);
       digitalWrite(CAMERA_FLASH_PIN, LOW);
     }
  #ifdef PRINT_MESSAGES
    Serial.print("Sound: ");
    Serial.println(soundVal, DEC);
  #endif
} else
{
 ////////////////////////////////////////////////////////////
  // LASER TRIGGER
  ////////////////////////////////////////////////////////////
    laserVal = analogRead(LASER_TRIGGER_ANALOG_PIN);
   if (laserVal < LASER_THRESHHOLD)
    {
       digitalWrite(CAMERA_FLASH_PIN, HIGH);
       digitalWrite(LASER_PIN, LOW);  // Turn off laser during picture
  #ifdef PRINT_MESSAGES
       Serial.println("Flash Triggered!!!");
  #endif
       delay(100);
       digitalWrite(CAMERA_FLASH_PIN, LOW);
       digitalWrite(LASER_PIN, HIGH);  // Turn laser back on after picture
     }
  #ifdef PRINT_MESSAGES
    Serial.print("Laser: ");
    Serial.println(laserVal, DEC);
  #endif
}
}
  }