Question about my Sketch.

Using Arduino Programming Questions
23

UKHeliBob:
The fact remains that neither sketch uses 3 pins defined as outputs to control the shield...

...You need to start with simple sketches that run the motor(s) and work from there
Try this

int motorA_dir = 12;    //direction

int motorA_brake = 9;   //brake
int motorA_speed = 3;   //speed

void setup()
{
  pinMode (motorA_dir, OUTPUT);    //set 3 pins to be outputs
  pinMode (motorA_brake, OUTPUT);
  pinMode (motorA_speed, OUTPUT);

digitalWrite(motorA_dir,HIGH);  //direction 1
  digitalWrite(motorA_brake,LOW);  //brake off

for (int motorSpeed = 0;motorSpeed <=255 ;motorSpeed++)
  {
    analogWrite(motorA_speed, motorSpeed);  //set the motor speed
    delay(100);                             //slow down the for loop a little
  }
  analogWrite(motorA_speed, 0);  //let the motor coast to a stop
}

void loop()
{
}



One motor should run up from its slowest speed to its highest then stop. Note how giving the Arduino pins names helps to make the code more readable.

I see what you are saying. I will give that a go as well, so obviously the sketch you provided is for a single motor, but once I get at least one working then it is a matter of adding the second..