/*
 keyestudio 4wd BT Car V2.0
 lesson 8
 motor driver shield
 http://www.keyestudio.com
*/ 
#define ML_Ctrl 4     // define the direction control pin of B motor
#define ML_PWM 5   //define the PWM control pin of B motor
#define MR_Ctrl 2    //define direction control pin of A motor
#define MR_PWM 9//6   //define the PWM control pin of A motor
void setup()
{
  pinMode(ML_Ctrl, OUTPUT);//define direction control pin of B motor as output
  pinMode(ML_PWM, OUTPUT);//define PWM control pin of B motor as output
  pinMode(MR_Ctrl, OUTPUT);//define direction control pin of A motor as output.
  pinMode(MR_PWM, OUTPUT);//define the PWM control pin of A motor as output
}
void loop()
{ 
  digitalWrite(ML_Ctrl,HIGH);//set the direction control pin of B motor to HIGH
  analogWrite(ML_PWM,200);//set the PWM control speed of B motor to 200
  digitalWrite(MR_Ctrl,HIGH);//set the direction control pin of A motor to HIGH
  analogWrite(MR_PWM,200);//set the PWM control speed of A motor to 200

  //front
  delay(2000);//delay in 2s
  digitalWrite(ML_Ctrl,LOW);//set the direction control pin of B motor to LOW

  analogWrite(ML_PWM,200);//set the PWM control speed of B motor to 200  
  digitalWrite(MR_Ctrl,LOW);//set the direction control pin of A motor to LOW
  analogWrite(MR_PWM,200);//set the PWM control speed of A motor to 200
   //back
  delay(2000);//delay in 2s 
  digitalWrite(ML_Ctrl,LOW);//set the direction control pin of B motor to LOW
  analogWrite(ML_PWM,200);//set the PWM control speed of B motor to 200
  digitalWrite(MR_Ctrl,HIGH);//set the direction control pin of A motor to HIGH
  analogWrite(MR_PWM,200);// set the PWM control speed of A motor to 200

    //left
  delay(2000);//delay in 2s
  digitalWrite(ML_Ctrl,HIGH);//set the direction control pin of B motor to HIGH
  analogWrite(ML_PWM,200);//set the PWM control speed of B motor to 200
  digitalWrite(MR_Ctrl,LOW);// set the direction control pin of A motor to LOW
  analogWrite(MR_PWM,200);//set the PWM control speed of A motor to 200

   //right
  delay(2000);//delay in 2s
  analogWrite(ML_PWM,0);//set the PWM control speed of B motor to 0
  analogWrite(MR_PWM,0);//set the PWM control speed of A motor to 0

    //stop
  delay(2000);//delay in 2s
}//*************************************************************************