// Include the AccelStepper Library
#include <AccelStepper.h>

// Define pin connections
const int dirPin = 2;
const int stepPin = 4;

// Define motor interface type
#define motorInterfaceType 1

// Creates an instance
AccelStepper myStepper(motorInterfaceType, stepPin, dirPin);

void setup() {
	Serial.begin(115200);
	// set the maximum speed, acceleration factor,
	// initial speed and the target position
	myStepper.setMaxSpeed(1000);
	myStepper.setAcceleration(50);
	myStepper.setSpeed(200);
	myStepper.moveTo(200);
}

void loop() {
	Serial.println("Current Step: " + String(myStepper.currentPosition()));
	Serial.println("Remaining Step: " + String(myStepper.distanceToGo()));
	
	// Change direction once the motor reaches target position
	if (myStepper.distanceToGo() == 0) {
		if (myStepper.currentPosition() == 200)
			myStepper.moveTo(0);
		else if (myStepper.currentPosition() == 0)
			myStepper.moveTo(200);
	}

	// Move the motor one step
	myStepper.run();
}