#include <AccelStepper.h>
#include <Bounce2.h>

#define NUM_BUTTONS 2

const int dirPin = 4;
const int stepPin = 5;
const int motorInterfaceType = 1;

bool start = false;

const int buttonPin[NUM_BUTTONS] = {2, 3};

AccelStepper myStepper = AccelStepper(motorInterfaceType, stepPin, dirPin);

Bounce2::Button button[NUM_BUTTONS] = {Bounce2::Button()};

void setup()
{
  Serial.begin(9600);

  for (byte i = 0; i < NUM_BUTTONS; i++)
  {
    button[i].attach(buttonPin[i], INPUT_PULLUP);
    button[i].setPressedState(LOW);
    button[i].interval(5);
  }
  myStepper.setMaxSpeed(1000);
}

void loop()
{
  if (start == true)
  {
    myStepper.setSpeed(400);
    myStepper.runSpeed();
  }
  else
  {
    myStepper.stop();
  }

  for (byte i = 0; i < NUM_BUTTONS; i++)
  {
    button[i].update();

    if (button[0].pressed() )
    {
      Serial.println("start");
      start = true;
    }
    else if (button[1].pressed() )
    {
      Serial.println("stop");
      start = false;
    }
  }
}