// http://www.airspayce.com/mikem/arduino/AccelStepper/
const byte dirPin = 9; // stepper as speed-indicating pot
const byte stepPin = 10; //
const byte enPin =13;

const int ROW_NUM = 1; //four rows
const int COLUMN_NUM = 2; //three columns

#define key1 6 //connect wire 1 to pin 2
#define key2 7 //connect wire 2 to pin 3
#define key3 11 //connect wire 1 to pin 2
#define key4 12 //connect wire 2 to pin 3
int key;

void setup()
{
  Serial.begin(115200);
  Serial.println("key");
  pinMode(stepPin, OUTPUT);
  pinMode(dirPin, OUTPUT);
  pinMode(enPin, OUTPUT);
 
 pinMode(key1, INPUT_PULLUP);// set pin as input
 pinMode(key2, INPUT_PULLUP);// set pin as input
 pinMode(key3, INPUT_PULLUP);// set pin as input
 pinMode(key4, INPUT_PULLUP);// set pin as input
 key=1;
}

void loop() 
{ 
  int pot_val = analogRead(A0);

  key=3;
  int key1S = digitalRead(key1);// read if key1 is pressed
  int key2S = digitalRead(key2);// read if key1 is pressed
  int key3S = digitalRead(key3);// read if key1 is pressed
  int key4S = digitalRead(key4);// read if key1 is pressed
 
    // Code written for Robojax.com video Tutorial
    
     if(!key1S){
     Serial.println("key 1 is pressed");
     key=1;
     }
     if(!key2S){
      Serial.println("key 2 is pressed");
       key=2;
     }
     if(!key3S){
     Serial.println("key 3 is pressed");
     key=4;
     }
     if(!key4S){
      Serial.println("key 4 is pressed");
       key=4;
     }
    

    if(key==1)
    {
     Serial.println(key);
     //key=1;
          //Serial.println(  map(pot_val, 0, 1023, 0, 1000));
         digitalWrite(enPin, LOW);
         digitalWrite(dirPin, HIGH);
         // Spin the stepper motor:      
         for (int i = 0; i < 100; i++) 
         {
         // These four lines result in 1 step:
         digitalWrite(stepPin, HIGH);
         //delay(tdelay);
         //delayMicroseconds(1000000);
         digitalWrite(stepPin, LOW);
         delay(map(pot_val, 0, 1023, 0, 1000));
         // delayMicroseconds(1000000);
         }
     }

     if(key==2)
     {
       Serial.println(key);
       //key=1;
          digitalWrite(enPin, LOW);
         digitalWrite(dirPin, LOW);
         // Spin the stepper motor:      
         for (int i = 0; i < 100; i++) 
         {
         // These four lines result in 1 step:
         digitalWrite(stepPin, HIGH);
         //delay(tdelay);
         //delayMicroseconds(1000000);
         digitalWrite(stepPin, LOW);
         delay(map(pot_val, 0, 1023, 0, 1000));
         // delayMicroseconds(1000000);
         }
     }
     delay(1000);
}