/*
 * This is Arduino code to control a 28BYJ-48 with ULN2003 board using
 2 push buttons to move the motor in one revolution in CW or CCW

This is video: STPBP-3
 * Written by Ahmad Shamshiri for Robojax Robojax.com
 * on April 18, 2020 at 19:59 in Ajax, Ontario, Canada
 * 
 Watch the video instruction for this sketch: https://youtu.be/MEEKvjj7vbY

More videos and codes
 STPB-1 Control Stepper 28BYJ-48 Push buttons using Arduino code CCW, CW STOP STPB-1
 STPB-2 Controlling Position of 28BYJ-48 Stepper Motor with 2 Push buttons STPB-2
 STPB-3 Controlling ONE Revolution of 28BYJ-48 Stepper Motor with 2 Push buttons STPB-3
 STPB-4 Send 28BYJ-48 Stepper Motor to any Angle  with 3 Push buttons STPB-4 CW, CCW and STOP
 

If you found this tutorial helpful, please support me so I can continue creating 
content like this. 
or make a donation using PayPal http://robojax.com/L/?id=64

* 
 * Code is available at http://robojax.com/learn/arduino

 * 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 speedFactor =1;//1=fastest, 2=slower or 3 more slower



int correction_CW = 150;
int correction_CCW = 150;

const int CW =1;
const int CCW =2;
const int STOP =3;
int poleStep = 0; 
const int SPR=64*64;

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

void setup() 
{ 
  //Robojax.com Stepper Push button One Revolution STPB-3
  Serial.begin(9600);
  Serial.print("Robojax Video for Stepper Motor STPB-3");  
 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() 
{ 
  //Robojax.com Stepper Push button One Revolution STPB-3
  if(digitalRead(switchCCW) == LOW) 
  {
    dirStatus =CCW;
    count =0;
  }else if(digitalRead(switchCW) == LOW)
  {
   dirStatus  = CW;  
    count =0;   
  }
  if(digitalRead(switchCW) == LOW && digitalRead(switchCCW) == LOW)
  {
    dirStatus  = STOP;
    delay(200);
  }
 if(dirStatus ==CW){ 
   poleStep++; 
   count++;   
   if(count+correction_CCW <= SPR)
   {
    driveStepper(poleStep);      
   }else{
      driveStepper(8);  
   }
  
 }else if(dirStatus ==CCW){ 
   poleStep--; 
   count++;   
   if(count+correction_CW <=SPR)
   {
    driveStepper(poleStep);      
   }else{
      driveStepper(8);  
   }   
 }else{
  driveStepper(8);   
 }
 if(poleStep>7){ 
   poleStep=0;
 } 
 if(poleStep<0){ 
   poleStep=7; 
 } 
 delay(speedFactor); 
  //Robojax.com Stepper Push button One Revolution STPB-3

}// loop


/*
 * @brief moves motor to specific angle 
 * @param "angle" is integer representing the angle
 * @return does not return anything
 * 
 * www.Robojax.com code April 19 2020 at 01:22 in Ajax, Ontario, Canada
 */
void driveStepper(int c)
{
     digitalWrite(Pin1, pole1[c]);  
     digitalWrite(Pin2, pole2[c]); 
     digitalWrite(Pin3, pole3[c]); 
     digitalWrite(Pin4, pole4[c]);
     if(c ==8)
     {
      digitalWrite(switchCW, HIGH); 
      digitalWrite(switchCCW, HIGH);               
     }
}//driveStepper ends here