#include <IRremote.h>

const int IR_PIN = 2;

IRrecv irrecv(IR_PIN);
decode_results results;

// Пины драйвера MX1508
const int LEFT_IN1  = 5;
const int LEFT_IN2  = 6;
const int RIGHT_IN1 = 9;
const int RIGHT_IN2 = 10;

void setup() {
  irrecv.enableIRIn();

  pinMode(LEFT_IN1, OUTPUT);
  pinMode(LEFT_IN2, OUTPUT);
  pinMode(RIGHT_IN1, OUTPUT);
  pinMode(RIGHT_IN2, OUTPUT);
}

void loop() {
  if (irrecv.decode(&results)) {

    unsigned long code = results.value;

    if (code == 0xFF18E7) {
      forward();
    }
    else if (code == 0xFF4AB5) {
      backward();
    }
    else if (code == 0xFF10EF) {
      left();
    }
    else if (code == 0xFF5AA5) {
      right();
    }
    else if (code == 0xFF38C7) {
      stopMotors();
    }

    irrecv.resume();
  }
}

void forward() {
  digitalWrite(LEFT_IN1, HIGH);
  digitalWrite(LEFT_IN2, LOW);
  digitalWrite(RIGHT_IN1, HIGH);
  digitalWrite(RIGHT_IN2, LOW);
}

void backward() {
  digitalWrite(LEFT_IN1, LOW);
  digitalWrite(LEFT_IN2, HIGH);
  digitalWrite(RIGHT_IN1, LOW);
  digitalWrite(RIGHT_IN2, HIGH);
}

void left() {
  digitalWrite(LEFT_IN1, LOW);
  digitalWrite(LEFT_IN2, HIGH);
  digitalWrite(RIGHT_IN1, HIGH);
  digitalWrite(RIGHT_IN2, LOW);
}

void right() {
  digitalWrite(LEFT_IN1, HIGH);
  digitalWrite(LEFT_IN2, LOW);
  digitalWrite(RIGHT_IN1, LOW);
  digitalWrite(RIGHT_IN2, HIGH);
}

void stopMotors() {
  digitalWrite(LEFT_IN1, LOW);
  digitalWrite(LEFT_IN2, LOW);
  digitalWrite(RIGHT_IN1, LOW);
  digitalWrite(RIGHT_IN2, LOW);
}