/////////////////////////////////////////////////////////////////////////////
//////                Code for Personal Spheres Project                //////
//////                       by Brian && Daniel                        //////
//////                         October, 2006                           //////
//////                                                                 //////
//////      "Dipping the biscuits while the gravy is still hot."       //////
/////////////////////////////////////////////////////////////////////////////

int trigger = 8;       // trigger pin 
int echo = 9;          // echo pin 
int toggle = 0;        // for lights to flash on and off
int treesandplants;    // added to give this code some environmental charm

int i, x, y, count, count2, val1, val2, output, outputLED;    // give me a sandbox...its playtime!!
float ratio;           // to toggle output values to serial port

int pin1 = 2;  //pins correspond to lights
int pin2 = 3;
int pin3 = 4;
int pin4 = 5;
int pin5 = 6;
int pin6 = 7;

int potPin = 0;  //pin for potentiometer
int potVal;  //var to determine pot value (usually $45 for an 1/8oz)
int potThreshold;  //user controlled threshold
 
void setup() {  
    pinMode(trigger, OUTPUT);  //sets trigger pin as output
    pinMode(echo, INPUT);      //sets echo pin as input
    
    pinMode(potPin, INPUT);     //sets potpin as input
 
    Serial.begin(9600);  
    printMode(SERIAL);      // sets the print method to print to the serial port 
    count = 0; //sets counter to zero
    y = 0;
    val2 = 0;
    
    pinMode(pin1, OUTPUT);    //sets LED pins as outputs
    pinMode(pin2, OUTPUT);
    pinMode(pin3, OUTPUT);
    pinMode(pin4, OUTPUT);
    pinMode(pin5, OUTPUT);
    pinMode(pin6, OUTPUT);
}

void loop()
{
//////////ultrasonic sensor code below//////////////////////////////////
      digitalWrite(trigger, 1); //send trigger pulse  
      delayMicroseconds(10);// delay loop for long-enough pulse 
      digitalWrite(trigger, 0); 
 
      val1 = digitalRead(echo);
  
      while(val1 != 1)          //waits for echo pin to go high
      {
        val1 = digitalRead(echo);
      }
        
      while(val1 == 1)          //times the duration that the echo pin is high (corresponds to distance)
      {
        count = count + 1;
        val1 = digitalRead(echo);
      }
      
      output = count/12;  //reduces count so numbers range from 0-100
      
      potVal = analogRead(potPin)/4;    //read pot value 0-255 (for testing purposes)
            
      outputLED = count/potVal; //for case statement

//////////////////////////output to LEDS below/////////////////////////////////////       
      if (output != 0 && outputLED < 25)
      { 
         printInteger(outputLED);              // send it out the serial port 
         serialWrite(10);  //line break
         serialWrite(13);  //start at beginnig of line
  
        switch (outputLED)         //not the most elegant way to code, but it works just fine.
         {
           case 0:   // uh oh, personal sphere has been violated
              toggle = 1;
              digitalWrite(pin1, toggle);        // Q. what do you get when you cross
              digitalWrite(pin2, toggle);        //    mark foley and a librarian??
              digitalWrite(pin3, toggle);        // A. i don't know, but he sure knows
              digitalWrite(pin4, toggle);        //    how to "turn" pages.
              digitalWrite(pin5, toggle);
              digitalWrite(pin6, toggle);
              
              delay(100);
              
              toggle = 0;
              digitalWrite(pin1, toggle);
              digitalWrite(pin2, toggle);
              digitalWrite(pin3, toggle);
              digitalWrite(pin4, toggle);
              digitalWrite(pin5, toggle);
              digitalWrite(pin6, toggle);
              break;
              
           case 1:   // hey, you are pushing it buddy
              digitalWrite(pin1, 1);
              digitalWrite(pin2, 1);
              digitalWrite(pin3, 0);
              digitalWrite(pin4, 0);
              digitalWrite(pin5, 0);
              digitalWrite(pin6, 0);
              break;
 
           case 2:   // object is pretty close
              digitalWrite(pin1, 0);
              digitalWrite(pin2, 0);
              digitalWrite(pin3, 1);
              digitalWrite(pin4, 1);
              digitalWrite(pin5, 0);
              digitalWrite(pin6, 0);
             break;
           case 3:   // an object has been detected at a distance
              digitalWrite(pin1, 0);
              digitalWrite(pin2, 0);
              digitalWrite(pin3, 0);
              digitalWrite(pin4, 0);
              digitalWrite(pin5, 1);
              digitalWrite(pin6, 1);
             break;             
           default:   // i was alone, i was all by myself, no one was looking, i was thinking of you...
              digitalWrite(pin1, 1);
              digitalWrite(pin2, 1);
              digitalWrite(pin3, 1);
              digitalWrite(pin4, 0);
              digitalWrite(pin5, 1);
              digitalWrite(pin6, 1);
              
              //whew!! i love the copy and paste functions.
         }                  
         output = count2;      
      } 
      delay(50);    //delay 50ms before next ping
      count = 0;    //sets count back to zero
}