Control 7 Segment Panel and DC Motor with Remote

#include "IRremote.h"

int receiver = 11;
int itsON[] = {0};
int value[] = {0};

IRrecv irrecv(receiver);
decode_results results;

int translateIR() {
  switch(results.value)
  {
  case 0xFF6897: return value[0] = 0;    break;
  case 0xFF30CF: return value[0] = 1;    break;
  case 0xFF18E7: return value[0] = 2;    break;
  case 0xFF7A85: return value[0] = 3;    break;
  case 0xFF10EF: return value[0] = 4;    break;
  case 0xFF38C7: return value[0] = 5;    break;
  case 0xFF5AA5: return value[0] = 6;    break;
  case 0xFF42BD: return value[0] = 7;    break;
  case 0xFF4AB5: return value[0] = 8;    break;
  case 0xFF52AD: return value[0] = 9;    break;
  }
  delay(500);
}

// define the LED digit patterns, from 0 - 9
// 1 = LED on, 0 = LED off, in this order:
//                74HC595 pin     Q0,Q1,Q2,Q3,Q4,Q5,Q6,Q7
//                Mapping to      a,b,c,d,e,f,g of Seven-Segment LED
byte seven_seg_digits[11] = { B11111100,  // = 0
                              B01100000,  // = 1
                              B11011010,  // = 2
                              B11110010,  // = 3
                              B01100110,  // = 4
                              B10110110,  // = 5
                              B10111110,  // = 6
                              B11100000,  // = 7
                              B11111110,  // = 8
                              B11100110,  // = 9
                              B00000000   // = null
                             };

// connect to the ST_CP of 74HC595 (pin 3,latch pin)
int latchPin = 3;
// connect to the SH_CP of 74HC595 (pin 4, clock pin)
int clockPin = 4;
// connect to the DS of 74HC595 (pin 2)
int dataPin = 2;

#define ENABLE 5
#define DIRA 6
#define DIRB 7

void setup() {
  irrecv.enableIRIn();

  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(ENABLE,OUTPUT);
  pinMode(DIRA,OUTPUT);
  pinMode(DIRB,OUTPUT);
}

int sevenSegWrite(byte digit) {

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, seven_seg_digits[digit]);
  digitalWrite(latchPin, HIGH);

  switch(results.value)

  {
  case 0xFFA25D:
    if(itsON[0] == 1) {
      sevenSegWrite(11);
      digitalWrite(ENABLE,LOW);
      digitalWrite(DIRA,LOW);
      digitalWrite(DIRB,LOW);
      itsON[0] = 0;
    }
    else {
      sevenSegWrite(value[0]);
      digitalWrite(ENABLE,value[0]);
      digitalWrite(DIRA,LOW);
      digitalWrite(DIRB,HIGH);
      itsON[0] = 1;
    }
    break;
  }
}

int increment(int num) {
  switch(results.value)
  {
    case 0xFF906F:
      int add = num + 1;
      digitalWrite(latchPin, LOW);
      shiftOut(dataPin, clockPin, LSBFIRST, seven_seg_digits[add]);
      digitalWrite(latchPin, HIGH);
      value[0] = add;
      break;
  }
}

int decrement(int num) {
  switch(results.value)
  {
    case 0xFFE01F:
      int sub = num - 1;
      digitalWrite(latchPin, LOW);
      shiftOut(dataPin, clockPin, LSBFIRST, seven_seg_digits[sub]);
      digitalWrite(latchPin, HIGH);
      value[0] = sub;
      break;
  }
}

int motor(int num) {
  if (num == 0) {
    analogWrite(ENABLE, LOW);
  }
  else if (num == 1) {
    analogWrite(ENABLE, 142);
  }
  else {
    analogWrite(ENABLE, num * 15 + 120);
  }
}

void loop() {
  if (irrecv.decode(&results))
  {
    sevenSegWrite(translateIR());
    increment(value[0]);
    decrement(value[0]);
    motor(value[0]);
    irrecv.resume();
  }
}