//////////////////////////////////////////////////////////
//
// STEPPER MOTOR CONTROLLER FOR MASTWERKS ROTOR
// HB9MTN
// 31.01.2023
//
//////////////////////////////////////////////////////////

// A good tutorial to start with Big Easy Driver (BED):
// http://www.schmalzhaus.com/EasyDriver/Examples/EasyDriverExamples.html
// 
// and for the NEOPIXEL Ring:
// https://github.com/adafruit/Adafruit_NeoPixel
//
//
// LET'S GO:


#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h> 
#endif

#define PIN 6            // LED Ring Data pin
#define NUMPIXELS 16     // Number of LEDs in array

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels

const int TargetSteps = 677;             // Target 22.5° per Button Push, to be adjusted [677]  
int Del         = 2000;
int StepCounter = 0;
int Stepping = false;
int Azimuth = 0;
int Dirsign = 0;


// 16 LED Ring
int i = 0;                                // LED address in array                          
int j = 30;                               // Offset to keep the math allways > 0 

void setup() {
  
  Serial.begin(112500); 
  pinMode(2, INPUT);
  pinMode(5, INPUT);
  
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);            
  pinMode(11, OUTPUT);             
  pinMode(12, OUTPUT);            
  pinMode(13, OUTPUT);
  
  digitalWrite(2, HIGH);   // CW  BUTTON
  digitalWrite(5, HIGH);   // CCW BUTTON 
  
  digitalWrite(8, LOW);    // DIR
  digitalWrite(9, LOW);    // STEP
  digitalWrite(10, LOW);   // M3
  digitalWrite(11, LOW);   // M2
  digitalWrite(12, HIGH);  // M1 
  digitalWrite(13, HIGH);  // DISABLE BED


#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif 
 
  pixels.begin();          // INITIALIZE NeoPixel strip object (REQUIRED)
  pixels.clear();          // Set all pixel colors to 'off'
  pixels.setPixelColor(i, pixels.Color(0, 80, 0));  

  delay(1000);             // allow time to start up

}

void loop() {

  pixels.show();           // Send the updated pixel colors to the hardware.
                                 
  if (digitalRead(2) == LOW && Stepping == false && digitalRead(5) == HIGH)
  {
    digitalWrite(8, HIGH);  // DIR CW   // if rotation is not CW, change to "LOW"
    Stepping = true;
    if ((j == 15) && (i == 1))   // check for limit
    {
      Dirsign = 1;
      Stepping = false;
    }
    else
    {
      Dirsign = -1;
      Stepping = true;
    }
  }
  
  if (digitalRead(5) == LOW && Stepping == false && digitalRead(2) == HIGH)
  {
    digitalWrite(8, LOW); // DIR CCW   // if rotation is not CCW, change to "HIGH"  
    Stepping = true;
    if ((j == 45) && (i == 15))   // check for limit
    {
      Dirsign = -1;
      Stepping = false;
    }
    else
    {
      Dirsign = 1;
      Stepping = true;
    }
  }

  if (Stepping == true)
  
  {
    digitalWrite(13, LOW);
    digitalWrite(9, HIGH);
    delayMicroseconds(Del);
    digitalWrite(9, LOW);
    delayMicroseconds(Del);
    StepCounter = (StepCounter + 1);
    Serial.println(StepCounter);
       
    if (StepCounter == TargetSteps)
    
    {
      StepCounter = 0;
      Stepping = false;
      digitalWrite(13, HIGH);
      j = (j + 1 * Dirsign);
      //i = (i + 1 * Dirsign);
      //pixels.clear();  // Set all pixel colors to 'off'
      pixels.setPixelColor(i, pixels.Color(0, 0, 80));
      pixels.show();   // Send the updated pixel colors to the hardware.
      calculateLED();
      Serial.println("i = ");
      Serial.println(i);      
      Serial.println("j = ");
      Serial.println(j);
      Serial.println("Dirsign = ");
      Serial.println(Dirsign);

    }
     
  }

}

void calculateLED()
{

if ((j > 29) && (j < 42))                             // between 30 and 41
{
  i = (j - 30);
  pixels.clear(); // Set all pixel colors to 'off'
  pixels.setPixelColor(i, pixels.Color(0, 0, 150));    // blue
}
if ((j > 18) && (j < 30))                             // between 19 and 29
{
  i = (j - 14);
  pixels.clear(); // Set all pixel colors to 'off'
  pixels.setPixelColor(i, pixels.Color(0, 0, 150));    // blue
}
else if ((j < 19) || (j > 41))                        // below 19 or above 41
{
  if (j < 19)
  {
  i = (j - 14);                                       // below 19
  pixels.clear(); // Set all pixel colors to 'off'
  pixels.setPixelColor(i, pixels.Color(80, 0, 0));    // red
  }
  else if (j > 41)                                    // above 41
  {
    i = (j - 30);
  pixels.clear(); // Set all pixel colors to 'off'
  pixels.setPixelColor(i, pixels.Color(80, 0, 0));    // red
}
}


else  
{
// do nothing
}

}