motor.ino

 
int analogPin = 0;
 
int pwm_a = 3;   //PWM control for motor outputs 1 and 2 is on digital pin 3
int pwm_b = 11;  //PWM control for motor outputs 3 and 4 is on digital pin 11
int dir_a = 12;  //direction control for motor outputs 1 and 2 is on digital pin 12
int dir_b = 13;  //direction control for motor outputs 3 and 4 is on digital pin 13
int val = 0;     //value for fade
int v = 0;
 
void setup()
{
  Serial.begin(9600);
  pinMode(pwm_a, OUTPUT);  //Set control pins to be outputs
  pinMode(pwm_b, OUTPUT);
  pinMode(dir_a, OUTPUT);
  pinMode(dir_b, OUTPUT);
  
  analogWrite(pwm_a, 100);  //set both motors to run at (100/255 = 39)% duty cycle (slow)
  analogWrite(pwm_b, 100);
 
  forw();         //Set Motors to go forward Note : No pwm is defined with the for function, so that fade in and out works  
}
 
 
void loop()
{ 
  val = analogRead(analogPin);
  v = map(val, 0, 1024, 0, 256);
  Serial.println(v);
  forward(v);      //continue full speed forward
  delay(100);    
 
}
 
 
 
void forw() // no pwm defined
{ 
  digitalWrite(dir_a, HIGH);  //Reverse motor direction, 1 high, 2 low
  digitalWrite(dir_b, HIGH);  //Reverse motor direction, 3 low, 4 high  
}
 
 
void forward(int sp) //full speed forward
{ 
  digitalWrite(dir_a, HIGH);  //Reverse motor direction, 1 high, 2 low
  digitalWrite(dir_b, HIGH);  //Reverse motor direction, 3 low, 4 high  
  analogWrite(pwm_a, sp);    //set both motors to run at (100/255 = 39)% duty cycle
  analogWrite(pwm_b, sp);
}