// // Stepper motor on Wokwi!

// #include <Stepper.h>

// const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
// // for your motor

// // initialize the stepper library on pins 8 through 11:
// Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

// void setup() {
//   // set the speed at 60 rpm:
//   myStepper.setSpeed(60);
//   // initialize the serial port:
//   Serial.begin(9600);
// }

// void loop() {
//   // step one revolution  in one direction:
//   Serial.println("clockwise");
//   myStepper.step(stepsPerRevolution);
//   delay(500);

//   // step one revolution in the other direction:
//   Serial.println("counterclockwise");
//   myStepper.step(-stepsPerRevolution);
//   delay(500);
// }


/*
 * Unipolar stepper motor speed and direction control with Arduino.
 * Full step control.
 * This is a free software with NO WARRANTY.
 * https://simple-circuit.com/
 */

// include Arduino stepper motor library
#include <Stepper.h>

// change this to the number of steps on your motor
#define STEPS 32

// create an instance of the stepper class, specifying
// the number of steps of the motor and the pins it's
// attached to
Stepper stepper(STEPS, 8, 9, 10, 11);

const int button =  4; // direction control button is connected to Arduino pin 4
const int pot    = A0; // speed control potentiometer is connected to analog pin 0

void setup()
{
  // configure button pin as input with internal pull up enabled
  pinMode(button, INPUT_PULLUP);
}

int direction_ = 1, speed_ = 0;

void loop()
{
  if ( digitalRead(button) == 0 )  // if button is pressed
    if ( debounce() )  // debounce button signal
    {
      direction_ *= -1;  // reverse direction variable
      while ( debounce() ) ;  // wait for button release
    }

  // read analog value from the potentiometer
  int val = analogRead(pot);

  // map digital value from [0, 1023] to [2, 500]
  // ===> min speed = 2 and max speed = 500 rpm
  if ( speed_ != map(val, 0, 1023, 2, 500) )
  { // if the speed was changed
    speed_ = map(val, 0, 1023, 2, 500);
    // set the speed of the motor
    stepper.setSpeed(speed_);
  }

  // move the stepper motor
  stepper.step(direction_);

}

// a small function for button debounce
bool debounce()
{
  byte count = 0;
  for(byte i = 0; i < 5; i++) {
    if (digitalRead(button) == 0)
      count++;
    delay(10);
  }
  if(count > 2)  return 1;
  else           return 0;
}