/*     UV Cure System with Rotation, Cooling and Purge
 *      
 *  by Lyle Stratton, www.HowToMechatronics.com
 *  
 */
 
// Defines Pins Numbers
const int ledPin = 12;  // UV LED's
const int stepPin = 7;  // Stepper Motor Step
const int dirPin = 5;  // Stepper Motor Direction
const int enbPin = 6;  // Stepper Motor Enable
const int purge = 23;  // Place Holder for Pneumatic Valve for Purge Flow
const int fan = 25;  // Place Holder for Fan
#define BUTTON_PIN 2

//RGB Pin Numbers
const int pinR = 28;
const int pinG = 32;
const int pinB = 30;

//some global variables available anywhere in the program
unsigned long startMillis;
unsigned long currentMillis;

// Fixed Variables for starting and stopping functions based on time
// Values are in milliseconds
const unsigned long MotorRampTime = 2000;  //Runs Motor Slow Till Time Elapses
const unsigned long MotorRampTime1 = 3000;  //Runs Motor Slow Till Time Elapses
const unsigned long MotorRampTime2 = 4000;  //Runs Motor Slow Till Time Elapses
const unsigned long LEDTimeOn = 6000;  //Turns UV LED Lights ON After Time Interval
const unsigned long TimeOn = 8000;  //Time Set to Turn Everything OFF After Time Interval
const unsigned long customDelayRamp = 1500;  // Defines variable for Stepper Speed
const unsigned long customDelayRamp1 = 1000;  // Defines variable for Stepper Speed
const unsigned long customDelayRamp2 = 700;  // Defines variable for Stepper Speed
const unsigned long customDelay = 400;  // Defines variable for Stepper Speed

static int turnOn; /*Variable Used to Evaluate State Change of Magnetic Switch, Button 
  is a Place Holder for the Magnetic Switch */

void setup() {
  pinMode(BUTTON_PIN, INPUT);  // Defines Button/Magnetic Switch as an Inpute
   Serial.begin(115200);  // Start Serial in case we need to print debugging info
  pinMode(ledPin, OUTPUT);  // Defines ledPin Variable as an Output
  startMillis = millis();  //initial start time

  turnOn = false;  /* Prevents Start of Functions if Equipment is Turned on With the 
  Magnetic Switch/Button on HIGH */

// Sets the pins as Outputs
  pinMode(stepPin,OUTPUT);
  pinMode(dirPin,OUTPUT);
  pinMode(purge,OUTPUT);
  pinMode(fan,OUTPUT);

//RGB Pins Set to Outputs
  pinMode(pinR, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinB, OUTPUT);
  digitalWrite(pinB, HIGH);

  digitalWrite(dirPin,LOW); //Enables the Motor to Move in a Particular Direction
}

void loop() {

// if Function That Only Exicutes if Button/Magnetic Switch is High and "turnOn" State is true
if (digitalRead(BUTTON_PIN)==HIGH & turnOn==true) {
  
    currentMillis = millis();  //Gets the Current "time" (The number of milliseconds since the program started)
 
  if (currentMillis - startMillis >= LEDTimeOn)  //Test Whether the Time Period has Elapsed
  {
    digitalWrite(ledPin, HIGH);  // If Time Period Elapsed Turn on the UV LED's
   }

  // Makes Stepper Pulse with Custom Delay Ramp and Ramp Up Time,
  if (currentMillis - startMillis <= MotorRampTime) {
  digitalWrite(stepPin, HIGH);
  delayMicroseconds(customDelayRamp);
  digitalWrite(stepPin, LOW);
  delayMicroseconds(customDelayRamp);
}

  // Makes Stepper Pulse with Custom Delay 1 Ramp and Ramp Up Time,
  if (currentMillis - startMillis <= MotorRampTime1) {
  digitalWrite(stepPin, HIGH);
  delayMicroseconds(customDelayRamp1);
  digitalWrite(stepPin, LOW);
  delayMicroseconds(customDelayRamp1);
}

  // Makes Stepper Pulse with Custom Delay 1 Ramp and Ramp Up Time,
  if (currentMillis - startMillis <= MotorRampTime2) {
  digitalWrite(stepPin, HIGH);
  delayMicroseconds(customDelayRamp2);
  digitalWrite(stepPin, LOW);
  delayMicroseconds(customDelayRamp2);
}

  // Makes Stepper Pulse with Custom Delay After Custom Delay 1,
  if (currentMillis - startMillis >= MotorRampTime2) {
  digitalWrite(stepPin, HIGH);
  delayMicroseconds(customDelay);
  digitalWrite(stepPin, LOW);
  delayMicroseconds(customDelay);
}

  //Turns Purge Fan and Red LED ON When Lid is Closed,
  digitalWrite(purge, HIGH);
  digitalWrite(fan, HIGH);
  digitalWrite(pinG, LOW);
  digitalWrite(pinB, LOW);
  digitalWrite(pinR, HIGH);
  
  // Turns everything but the fan off when TimeOn has Elapsed
  if (currentMillis-startMillis >= TimeOn) {
    turnOn = false;
    digitalWrite(ledPin, LOW);
    digitalWrite(purge, LOW);
    digitalWrite(pinB, LOW);
    digitalWrite(pinR, LOW);
    digitalWrite(pinG, HIGH);
    startMillis = currentMillis;  //IMPORTANT to save the time of the current LED state.
   }
}

// Turns Everything off if the Magnetic Swithc/Button is LOW and Resets Time/Counts and "turnOn" State
if (digitalRead(BUTTON_PIN)==LOW) {
  digitalWrite(ledPin, LOW);
  digitalWrite(purge, LOW);
  digitalWrite(fan, LOW);
    digitalWrite(pinR, LOW);
    digitalWrite(pinG, LOW);
    digitalWrite(pinB, HIGH);
  startMillis = currentMillis;
  currentMillis = millis();
  turnOn = true;
 }

}