// Two Motors controlled by Two Buttons - PIN Reduction //

// Motor A (Original)
const int RPWM_A = 5,
          LPWM_A = 6,
          R_EN_A = 7,
          L_EN_A = 7,
          b1 = 2;  // Button 1

// Motor B (New)
const int RPWM_B = 9,
          LPWM_B = 10,
          R_EN_B = 7,
          L_EN_B = 7,
          b2 = 3;  // Button 2

void setup() {
  // Motor A pins
  pinMode(RPWM_A, OUTPUT);
  pinMode(LPWM_A, OUTPUT);
  pinMode(R_EN_A, OUTPUT);
  pinMode(L_EN_A, OUTPUT);
  pinMode(b1, INPUT);

  digitalWrite(R_EN_A, HIGH);
  digitalWrite(L_EN_A, HIGH);

  // Motor B pins
  pinMode(RPWM_B, OUTPUT);
  pinMode(LPWM_B, OUTPUT);
  pinMode(R_EN_B, OUTPUT);
  pinMode(L_EN_B, OUTPUT);
  pinMode(b2, INPUT);

  digitalWrite(R_EN_B, HIGH);
  digitalWrite(L_EN_B, HIGH);
}

void loop() {
  // Stop both motors by default
  analogWrite(RPWM_A, 0);
  analogWrite(LPWM_A, 0);
  analogWrite(RPWM_B, 0);
  analogWrite(LPWM_B, 0);

  // Run Motor A while button 1 is pressed
  while (digitalRead(b1) == HIGH) {
    analogWrite(RPWM_A, 200);
    analogWrite(LPWM_A, 0);
  }

  // Run Motor B while button 2 is pressed
  while (digitalRead(b2) == HIGH) {
    analogWrite(RPWM_B, 0);
    analogWrite(LPWM_B, 200);
  }
}