/*
* Lesson 107-4: Controlling a stepper motor using 2 push buttons STPB-2.
STPB-2: We control a stepper motor using two push buttons. One push button rotates the motor clockwise (CW), and the other rotates it counter-clockwise (CCW). Keys must be kept pressed.

In this lesson, we learn how to use a mini stepper motor 28BYJ-48 for our project. I am presenting 8 projects so you can use it in almost any application. In the video, I have explained the code, shown the full wiring diagram, and shown how to connect the wires, push buttons, and breadboard.

  Project 1: Running motor
  Project 2: Controlling stepper motor from Serial Monitor
  Project 3: Controlling stepper motor using push button STPB-1
  Project 4: Controlling using push button STPB-2 keep pressing (this code)
  Project 5: One Revolution using push button STPB-3
  Project 6: Push button: Any Angle and speed STPB-4
  Project 7: Using multiple buttons for any angle: STPB-5 (angle, speed and direction)
  Project 8: Controlling stepper motor using potentiometer

  * Watch Video instruction for this code: https://youtu.be/TQ7R2bY-MWU
  *
  * This code is part of the Arduino Step by Step Course, which starts here:  https://youtu.be/-6qSrDUA5a8
  *
  * For the library for this code, visit http://robojax.com/
  *

If you found this tutorial helpful, please support me so I can continue creating
content like this. Make a donation using PayPal or a credit card: https://bit.ly/donate-robojax

* Written by Ahmad Shamshiri for Robojax Robojax.com
* on Feb 20, 2019 at 19:34 in Ajax, Ontario, Canada

  *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.*
  * This code has been downloaded from Robojax.com
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.

     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/
int Pin1 = 10;//IN1 is connected to 10
int Pin2 = 11;//IN2 is connected to 11
int Pin3 = 12;//IN3 is connected to 12
int Pin4 = 13;//IN4 is connected to 13
int switchCW  =2;//define input pin for CW push button
int switchCCW =3;//define input pin for CCW push button


int pole1[] ={0,0,0,0, 0,1,1,1, 0};//pole1, 8 step values
int pole2[] ={0,0,0,1, 1,1,0,0, 0};//pole2, 8 step values
int pole3[] ={0,1,1,1, 0,0,0,0, 0};//pole3, 8 step values
int pole4[] ={1,1,0,0, 0,0,0,1, 0};//pole4, 8 step values


int poleStep = 0;
int  dirStatus = 3;// stores direction status 3= stop (do not change)

void setup()
{
 pinMode(Pin1, OUTPUT);//define pin for ULN2003 in1
 pinMode(Pin2, OUTPUT);//define pin for ULN2003 in2
 pinMode(Pin3, OUTPUT);//define pin for ULN2003 in3
 pinMode(Pin4, OUTPUT);//define pin for ULN2003 in4

 pinMode(switchCW,INPUT_PULLUP);
 pinMode(switchCCW,INPUT_PULLUP);

}
void loop()
{

  if(digitalRead(switchCCW) == LOW)
  {
    dirStatus =1;
  }else if(digitalRead(switchCW) == LOW)
  {
   dirStatus  = 2;
  }else
  {
    dirStatus =3;
  }
 if(dirStatus ==1){
   poleStep++;
    driveStepper(poleStep);
 }else if(dirStatus ==2){
   poleStep--;
    driveStepper(poleStep);
 }else{
  driveStepper(8);
 }
 if(poleStep>7){
   poleStep=0;
 }
 if(poleStep<0){
   poleStep=7;
 }
 delay(1);

}// loop



/*
 * @brief sends signal to the motor
 * @param "c" is an integer representing the pole of the motor
 * @return does not return anything
 *
 * www.Robojax.com code June 2019
 */
void driveStepper(int c)
{
     digitalWrite(Pin1, pole1[c]);
     digitalWrite(Pin2, pole2[c]);
     digitalWrite(Pin3, pole3[c]);
     digitalWrite(Pin4, pole4[c]);
}//driveStepper end here