DRV8837 Motor Driver Beginner Tutorial with Arduino

				
					// Define pins for DRV8837 motor driver
const int INA1 = 2;
const int INA2 = 3;
const int INB1 = 4;
const int INB2 = 5;
const int SLEEPA = 6;
const int SLEEPB = 7;

void setup() {
  // Set all motor control pins as output
  pinMode(INA1, OUTPUT);
  pinMode(INA2, OUTPUT);
  pinMode(INB1, OUTPUT);
  pinMode(INB2, OUTPUT);
  pinMode(SLEEPA, OUTPUT);
  pinMode(SLEEPB, OUTPUT);
  
  // Enable DRV8837 chips (HIGH = active, LOW = sleep mode)
  digitalWrite(SLEEPA, HIGH);
  digitalWrite(SLEEPB, HIGH);
}

void loop() {
  // Motor A forward rotation (PWM speed: 0-255)
  motorRun(INA1, INA2, 200);
  // Motor B forward rotation
  motorRun(INB1, INB2, 200);
  delay(2000); // Keep running for 2 seconds

  // Motor A reverse rotation
  motorRun(INA2, INA1, 200);
  // Motor B reverse rotation
  motorRun(INB2, INB1, 200);
  delay(2000); // Keep running for 2 seconds

  // Stop both motors
  motorStop(INA1, INA2);
  motorStop(INB1, INB2);
  delay(1000); // Stop for 1 second
}

// Motor control function: control direction and speed
// pinForward: PWM pin for forward direction
// pinReverse: PWM pin for reverse direction
// speed: PWM value (0 = stop, 255 = maximum speed)
void motorRun(int pinForward, int pinReverse, int speed) {
  analogWrite(pinForward, speed);
  digitalWrite(pinReverse, LOW);
}

// Motor stop function: set both control pins to LOW
void motorStop(int pin1, int pin2) {
  digitalWrite(pin1, LOW);
  digitalWrite(pin2, LOW);
}