#include <IRremote.h>

#define EnA   10
#define EnB   3
#define In1   9
#define In2   8
#define In3   7
#define In4   4

const int RECV_PIN = 12;
IRrecv irrecv(RECV_PIN);
decode_results results;

void forward() {
    digitalWrite(In1, LOW);
    digitalWrite(In2, HIGH);
    analogWrite(EnA, 200);
    digitalWrite(In3, HIGH);
    digitalWrite(In4, LOW);
    analogWrite(EnB, 200);
}

void backward() {
    digitalWrite(In1, HIGH);
    digitalWrite(In2, LOW);
    analogWrite(EnA, 200);
    digitalWrite(In3, LOW);
    digitalWrite(In4, HIGH);
    analogWrite(EnB, 200);
}

void left() {
    digitalWrite(In1, LOW);
    digitalWrite(In2, LOW);
    analogWrite(EnA, 200);
    digitalWrite(In3, HIGH);
    digitalWrite(In4, HIGH);
    analogWrite(EnB, 200);
}

void right() {
    digitalWrite(In1, HIGH);
    digitalWrite(In2, HIGH);
    analogWrite(EnA, 200);
    digitalWrite(In3, LOW);
    digitalWrite(In4, LOW);
    analogWrite(EnB, 200);
}

void off() {
    digitalWrite(In1, LOW);
    digitalWrite(In2, LOW);
    digitalWrite(In3, LOW);
    digitalWrite(In4, LOW);
}

void setup() {
    Serial.begin(9600);
    irrecv.enableIRIn();
    irrecv.blink13(true);

    // Setup motor pins
    pinMode(EnA, OUTPUT);
    pinMode(EnB, OUTPUT);
    pinMode(In1, OUTPUT);
    pinMode(In2, OUTPUT);
    pinMode(In3, OUTPUT);
    pinMode(In4, OUTPUT);
}

void loop() {
    // IR Remote Control
    if (irrecv.decode(&results)) {
        irrecv.resume();

        if (results.value == 0xFF629D) { // FORWARD
            forward();
        } else if (results.value == 0xFFA857) { // BACKWARD
            backward();
        } else if (results.value == 0xFF22DD) { // LEFT
            left();
        } else if (results.value == 0xFFC23D) { // RIGHT
            right();
        } else if (results.value == 0xFFA25D) { // POWER Button Turn OFF
            off();
        }
    }
}