/////////////////////////////////////////////////////////////////////////////////////
//  TomatoCam v1.0 by Bryan Zimmer
//  http://www.bryanzimmer.net
//  Released 1-10-2009
/////////////////////////////////////////////////////////////////////////////////////

int picture_interval = 60;   // minutes between pictures. if setting to seconds you must account for time to start up and shut down camera.
int dusk = 100;              // 0 - 1024 is dark to light
int powerPinTime = 1000;     // milliseconds to hold down the power button
int shutterPinTime = 2500;   // milliseconds to hold down the shutter button

int powerPin = 9;            // power button connected to digital pin 9
int shutterPin = 10;         // shutter button connected to digital pin 10
int ledPin = 13;             // led connected to digital pin 13
int lightPin = 0;            // photoresistor connected to analog pin 0

int light = 0;               // current light level
int time = 0;                // seconds since last shutter release
int first_run = 1;           // first run of loop sets off a test run no matter what
extern volatile unsigned long timer0_millis;  // needed for resetting millis()


/////////////////////////////////////////////////////////////////////////////////////
 
void setup() 
{
  pinMode(ledPin, OUTPUT);  // configure output pins
  pinMode(powerPin, OUTPUT);
  pinMode(shutterPin, OUTPUT);
  
  digitalWrite(powerPin, LOW);  // set output to zero/low/off
  digitalWrite(shutterPin, LOW);
  digitalWrite(ledPin, LOW);
  
  Serial.begin(9600);
  delay(5000);
}


/////////////////////////////////////////////////////////////////////////////////////

void loop() 
{
  Serial.print("Light: ");  // print debugging info to the console
  Serial.print(light);
  Serial.println();
  Serial.print("Minutes: ");
  Serial.print(time);
  Serial.println();
  Serial.println();

  time = millis() / 1000 / 60;  // read current time in minutes
  light = analogRead(lightPin);  // read value from the light sensor

  if ( (light <= dusk && time >= picture_interval) || (first_run == 1) )
  {
    digitalWrite(ledPin, HIGH);  // turn on led
    digitalWrite(powerPin, HIGH);  // turn on camera by holding down power button
    delay(powerPinTime);
    digitalWrite(powerPin, LOW);
    digitalWrite(ledPin, LOW);
    delay(3000);
  
    digitalWrite(ledPin, HIGH);  // turn on led  
    digitalWrite(shutterPin, HIGH);  // take a picture by holding down the shutter button
    delay(shutterPinTime);
    digitalWrite(shutterPin, LOW);
    digitalWrite(ledPin, LOW);
    resetMillis();  // use this to avoid the millis() overflow at 9.5 hours
    time = 0;  // start timer over again
    first_run = 0;
    delay(3000);
  
    digitalWrite(powerPin, HIGH);  // turn off camera
    delay(powerPinTime);
    digitalWrite(powerPin, LOW);
    
  } 
}


/////////////////////////////////////////////////////////////////////////////////////

void resetMillis()  // use this to avoid the millis() overflow at 9.5 hours
{
  cli();  // disable interrupts
  timer0_millis = 0;
  sei();  // enable interrupts
}


/////////////////////////////////////////////////////////////////////////////////////