SN754410 motor driver

motor_driver_sample_code

const int motor1A = 9;    // H-bridge (pin 2, 1A)
const int motor2A = 8;    // H-bridge (pin 7, 2A)

const int motor3A = 13;    // H-bridge (pin 14, 3A)
const int motor4A = 12;    // H-bridge (pin 10, 4A)

const int enablePin1 = 10;    // H-bridge enable pin
const int enablePin2 = 11;    // H-bridge enable pin

const int pushButtonUp = 4; //initialise pushbutton pins
const int pushButtonDown = 5;

const int pushButtonLeft = 6;
const int pushButtonRight = 3;



void setup() {
  
    Serial.begin(9600);
    
    pinMode(motor1A, OUTPUT); //set motor logic pins for each motor
    pinMode(motor2A, OUTPUT);
    pinMode(motor3A, OUTPUT);
    pinMode(motor4A, OUTPUT);
    
    pinMode(enablePin1, OUTPUT); //set enable pins for each motor
    pinMode(enablePin2, OUTPUT);
    
    pinMode(pushButtonLeft, INPUT);
    digitalWrite(pushButtonLeft, HIGH);
    
    pinMode(pushButtonRight, INPUT);
    digitalWrite(pushButtonRight, HIGH);
 
}

void loop() {
    
    if (digitalRead(pushButtonLeft) == LOW){
      
      digitalWrite(enablePin1, HIGH);
      digitalWrite(enablePin2, HIGH);
      
      digitalWrite(motor1A, HIGH);  
      digitalWrite(motor2A, LOW);
      digitalWrite(motor3A, LOW);  
      digitalWrite(motor4A, HIGH);
      
      Serial.println("left");
    }
    
    else if (digitalRead(pushButtonRight) == LOW){
      
      digitalWrite(enablePin1, HIGH);
      digitalWrite(enablePin2, HIGH);
      
      digitalWrite(motor1A, LOW);  
      digitalWrite(motor2A, HIGH);
      digitalWrite(motor3A, HIGH);  
      digitalWrite(motor4A, LOW); 
      
      Serial.println("right");
    }
    
    else {
      
      digitalWrite(enablePin1, HIGH);
      digitalWrite(enablePin2, HIGH);
      
      digitalWrite(motor1A, HIGH);  
      digitalWrite(motor2A, HIGH);
      digitalWrite(motor3A, HIGH);  
      digitalWrite(motor4A, HIGH); 
      
      Serial.println("nothing");
    }
}