2_hDrive_test1.ino

//define the two direction logic pins and the speed / PWM pin
const int DIR_A = 5;
const int DIR_B = 4;
const int PWM = 6;

void setup()
{
  //set all pins as output
  pinMode(DIR_A, OUTPUT);
  pinMode(DIR_B, OUTPUT);
  pinMode(PWM, OUTPUT);
  Serial.println("setup");
}

void loop()
{
  //drive forward at full speed by pulling DIR_A High
  //and DIR_B low, while writing a full 255 to PWM to
  //control speed
  digitalWrite(DIR_A, HIGH);
  digitalWrite(DIR_B, LOW);
  analogWrite(PWM, 255);
  Serial.println("A,HIGH/B,LOW");

  //wait 1 second
  delay(1000);

  //Brake the motor by pulling both direction pins to
  //the same state (in this case LOW). PWM doesn't matter
  //in a brake situation, but set as 0.
  digitalWrite(DIR_A, LOW);
  digitalWrite(DIR_B, LOW);
  analogWrite(PWM, 0);
  Serial.println("all low");

  //wait 1 second
  delay(1000);

  //change direction to reverse by flipping the states
  //of the direction pins from their forward state
  digitalWrite(DIR_A, LOW);
  digitalWrite(DIR_B, HIGH);
  analogWrite(PWM, 150);
  Serial.println("A, Low//B, High");

  //wait 1 second
  delay(1000);

  //Brake again
  digitalWrite(DIR_A, LOW);
  digitalWrite(DIR_B, LOW);
  analogWrite(PWM, 0);
  Serial.println("all low");

  //wait 1 second
  delay(1000);

  //drive forward at full speed by pulling DIR_A High
  //and DIR_B low, while writing a full 255 to PWM to
  //control speed
  digitalWrite(DIR_A, HIGH);
  digitalWrite(DIR_B, LOW);
  analogWrite(PWM, 255);
  Serial.println("A,HIGH/B,LOW");
  delay(5000);
}