// Dino -- Ambient Display Creature
//
// By James Kim, dzeikei1@hotmail.com
//
// Last Updated 8/11/2006


int servoPin = 2;     // Control pin for servo motor
int lastPulse = 0;    // the time in milliseconds of the last pulse
int refreshTime = 20; // the time needed in between pulses
int pulse = 0;
int servoPos = 50;

int redPin   = 9;   // Green LED,   connected to digital pin 9
int greenPin = 10;  // Yellow LED, connected to digital pin 10
int bluePin  = 11;  // Red LED,  connected to digital pin 11
int in = -1;

int redVal = 0;
int greenVal = 0;
int blueVal  = 0;

void setup()
{
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);   
  pinMode(bluePin, OUTPUT);
  pinMode(servoPin, OUTPUT);
  Serial.begin(9600);
}

void loop(){
  if (Serial.available() > 0){  
    in = Serial.read();
    if( in >= 30 && in <= 70 ){
      servoPos = in;
      if (millis() - lastPulse >= refreshTime){
        pulse = servoPos * 20 + 500;
        digitalWrite(servoPin, HIGH);   // Turn the motor on
        delayMicroseconds(pulse);       // Length of the pulse sets the motor position
        digitalWrite(servoPin, LOW);    // Turn the motor off
        lastPulse = millis();           // save the time of the last pulse
      }
    }               // servo position
    
    if( in == 101 ){
    redVal = 0;
    greenVal = 0;
    blueVal = 0;
    }
    
    if( in == 102 ){
    redVal = 0;
    }
    
    if( in == 103 ){
    greenVal = 0;
    }
    
    if( in == 104 ){
    blueVal = 0;
    }
    
    if( in >= 105 && in <= 108 ){
      redVal = redVal + (in - 104) * 64;
    }  // red LED increase

    if( in >= 109 && in <= 112 ){
      redVal = redVal - (in - 108);
    }  // red LED decrease
    
    if( in >= 113 && in <= 116){
      greenVal = greenVal + (in - 112) * 64;
    } // green LED increase
    
    if( in >= 117 && in <= 120){
      greenVal = greenVal - (in - 116);
    } // green LED decrease
    
    if( in >= 121 && in <= 124){
      blueVal = blueVal + (in - 120) * 64;
    }  // blue LED increase
    
    if( in >= 125 && in <= 128){
      blueVal = blueVal - (in - 124) * 4;
    }  // blue LED decrease
    
    if(redVal > 255){
      redVal = 255;
    }
    if(greenVal > 255){
      greenVal = 255;
    }
    if(blueVal > 255){
      blueVal = 255;
    }
    if(redVal < 0){
      redVal = 0;
    }
    if(greenVal < 0){
      greenVal = 0;
    }
    if(blueVal < 0){
      blueVal = 0;
    }
    analogWrite(redPin, redVal);
    analogWrite(greenPin, greenVal);
    analogWrite(bluePin, blueVal);
  }
}