//https://www.circuits-diy.com/stepper-motor-and-limit-switch-arduino-tutorial/

#include <ezButton.h>
#include <AccelStepper.h>

#define STEPPER1_DIR_PIN 16
#define STEPPER1_STEP_PIN 17

#define DIRECTION_CCW -1
#define DIRECTION_CW   1

#define MAX_POSITION 0x7FFFFFFF // maximum of position we can set (long type)

ezButton limitSwitch(23); // create ezButton object that attach to pin A0;

AccelStepper stepper1(AccelStepper::DRIVER, STEPPER1_STEP_PIN, STEPPER1_DIR_PIN);

int count = 0;

int direction  = DIRECTION_CW;
long targetPos = 0;

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

  limitSwitch.setDebounceTime(20); // set debounce time to 50 milliseconds

  stepper1.setMaxSpeed(500.0);   // set the maximum speed
  stepper1.setAcceleration(50.0); // set acceleration
  stepper1.setSpeed(100);         // set initial speed
  stepper1.setCurrentPosition(0); // set position

  targetPos = direction * MAX_POSITION;
  stepper1.moveTo(targetPos);
}

void loop() {
  limitSwitch.loop(); // MUST call the loop() function first

  if (limitSwitch.isPressed()) {
    count++;
    Serial.print(F("The limit switch: TOUCHED  count= "));
    Serial.println(count);
    //direction *= -1; // change direction
    //Serial.print(F("The direction -> "));
    //if (direction == DIRECTION_CW)
      //Serial.println(F("CLOCKWISE"));
    //else
    // Serial.println(F("ANTI-CLOCKWISE"));

    targetPos = direction * MAX_POSITION;
    stepper1.setCurrentPosition(0); // set position
    stepper1.moveTo(targetPos);
  }

  // without this part, the move will stop after reaching maximum position
  if (stepper1.distanceToGo() == 0) { // if motor moved to the maximum position
    stepper1.setCurrentPosition(0);   // reset position to 0
    stepper1.moveTo(targetPos);       // move the motor to maximum position again
  }

  stepper1.run(); // MUST be called in loop() function
}