L298N Motor Driver Controller Board

Controlling_Motors_speed_with_an_Arduino.ino

#define FORWARD 8
#define BACKWARD 2
#define STOP 5
#define PWM_PIN_1 9 //speed control pin for motor1
#define PWM_PIN_2 10 ///speed control pin for motor2
 
int Motor[2][2] = //two dimensional array
{
{4 , 5},   //input pin to control Motor1--> Motor[0][0]=4, Motor[0][1]=5
{6 , 7},   //input pin to control Motor2--> Motor[1][0]=6, Motor[1][1]=7
};
 
void setup() {
  pinMode(PWM_PIN_1, OUTPUT);   
  pinMode(PWM_PIN_2, OUTPUT); 
  pinMode(Motor[0][0], OUTPUT);  
  pinMode(Motor[0][1], OUTPUT);
  pinMode(Motor[1][0], OUTPUT);  
  pinMode(Motor[1][1], OUTPUT);   
  motor_run(0, FORWARD);    //motor1 forward
  motor_run(1, BACKWARD);   //motor2 backward  
}
 
void loop() {
   //decelerate
  for (int  motor_speed=255; motor_speed>=0; motor_speed--) {
    analogWrite(PWM_PIN_1, motor_speed); 
    analogWrite(PWM_PIN_2, motor_speed);
    delay(20);  //delay 20 milliseconds
  }  
 
  //accelerate
  for (int  motor_speed=0; motor_speed<=255; motor_speed++) {
    analogWrite(PWM_PIN_1, motor_speed);
    analogWrite(PWM_PIN_2, motor_speed);
    delay(20);   //delay 20 milliseconds
  }
}
 
void motor_run(int motor, int movement) {
  switch (movement) {
    case FORWARD:  
      digitalWrite(Motor[motor][0], HIGH);
      digitalWrite(Motor[motor][1], LOW);
      break;
    case BACKWARD:   
      digitalWrite(Motor[motor][0], LOW);
      digitalWrite(Motor[motor][1], HIGH);;
      break; 
    case STOP:  
      digitalWrite(Motor[motor][0], LOW);
      digitalWrite(Motor[motor][1], LOW);;
      break;      
  }     
}