Arduino Code for L9110 Dual DC motor controller module

Using This code you can control two DC motor with maximum current of 800mA and voltage of 2.6V to 12V. This code is written for Robojax.com.
L9110 DC Motor Controller Data Sheet

  

/*
 * Display number on seven segment display with Arduino
 * Written by Ahmad Shamshiri for Robojax.com
Date modified: Jun 11, 2018 at 17:20 at Ajax, Ontario, Canada
watch video instruction for this code:https://youtu.be/-g6Q9lSHDzg

Code is provided for free AS IS without warranty. 
You can share this acode as long as you keep the above note intact.
 */

const int A1A = 2;//define pin 2 for A1A
const int A1B = 3;//define pin 3 for A1B

const int B1A = 8;//define pin 8 for B1A
const int B1B = 9;//define pin 9 for B1B




void setup() {
  pinMode(B1A,OUTPUT);// define pin as output
  pinMode(B1B,OUTPUT);
  
  pinMode(A1A,OUTPUT);
  pinMode(A1B,OUTPUT);    
  delay(3000);
}

void loop() {

  motorA('R');// Turn motor A to RIGHT
  delay(2000);
   motorA('L');// Turn motor A to LEFT
  delay(2000);   
  motorA('O');// Turn motor A OFF
  delay(2000); 
    
  motorB('R');// Turn motor B to RIGHT
  delay(2000);
   motorB('L');// Turn motor B to LEFT
  delay(2000); 
  motorB('O');// Turn motor B OFF
  delay(2000); 
   
  motorA('R');// Turn motor A to RIGHT
  motorB('R'); // Turn motor A to RIGHT 
  delay(2000);
  motorA('L');// Turn motor A to LEFT
  motorB('L');// Turn motor B to LEFT     
  delay(3000);
  motorA('O');// Turn motor A OFF
  motorB('O');// Turn motor B OFF
  delay(5000);
   
}

/*
 * @motorA
 * activation rotation of motor A
 * d is the direction
 * R = Right
 * L = Left
 */
void motorA(char d)
{
  if(d =='R'){
    digitalWrite(A1A,LOW);
    digitalWrite(A1B,HIGH); 
  }else if (d =='L'){
    digitalWrite(A1A,HIGH);
    digitalWrite(A1B,LOW);    
  }else{
    //Robojax.com L9110 Motor Tutorial
    // Turn motor OFF
    digitalWrite(A1A,LOW);
    digitalWrite(A1B,LOW);    
  }
}// motorA end


/*
 * @motorB
 * activation rotation of motor B
 * d is the direction
 * R = Right
 * L = Left
 */
void motorB(char d)
{

    if(d =='R'){
      digitalWrite(B1A,LOW);
      digitalWrite(B1B,HIGH); 
    }else if(d =='L'){
      digitalWrite(B1A,HIGH);
      digitalWrite(B1B,LOW);    
    }else{
    //Robojax.com L9110 Motor Tutorial
    // Turn motor OFF      
      digitalWrite(B1A,LOW);
      digitalWrite(B1B,LOW);     
    }

}// motorB end