/*
  Stepper Motor Control - Bounce Between Limit Switches
  
  https://wokwi.com/projects/403962641012999169

  This program drives a unipolar or bipolar stepper motor.
  The motor is attached to digital pins 8 - 11 of the Arduino.

  The motor should revolve one revolution in one direction, then
  one revolution in the other direction.


  Created 11 Mar. 2007
  Modified 30 Nov. 2009
  by Tom Igoe

  Modified to use a simple two-state state machine for
  https://forum.arduino.cc/t/stepper-motor-not-running-continuously/1283598

*/

#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);


int movingCW = true;

void setup() {
  // set the speed at 60 rpm:
  myStepper.setSpeed(60);
  // initialize the serial port:
  Serial.begin(9600);
  pinMode(A0, INPUT_PULLUP);
  pinMode(A1, INPUT_PULLUP);
}

void loop() {

  if (movingCW) {
    // step one revolution in one direction:
    myStepper.step(stepsPerRevolution/100);
    if (digitalRead(A0) == LOW) {
      movingCW = false;
      Serial.println("counterclockwise");
    }
  } else {
    // step one revolution in the other direction:
    myStepper.step(-stepsPerRevolution/100);
    if (digitalRead(A1) == LOW) {
      movingCW = true;
      Serial.println("clockwise");
    }
  }
  //  delay(500);
}