#define dly 1
unsigned long tempo;
uint8_t ptr = 1;
uint8_t cpt = 0;

uint8_t row = 0;
unsigned long ledpos = 0;
uint8_t offs = 0;
uint8_t pB = 0;
uint8_t pbTimer;
uint8_t att;
bool mute = false;
uint8_t pos;
uint8_t old_att;


#define IR_RECEIVE_PIN      2
#define DECODE_NEC
#include "PinDefinitionsAndMore.h"
#include <IRremote.hpp> // include the library

//---------------
void readP1()
{
  ledpos=0;
  if (!mute)
  {
    ledpos=1UL<<att;
    if ((pos == 4) || (pos == 9) || (pos == 14))
      ledpos |=1<< (att - 1);
  }
}

//-----------
void ledMux1()
{
  PORTB = 0xfF;
  if (cpt > 4)
  {
    cpt = 0;
    ptr = 1;
    row++;
    if (row > 3)
      row = 0;
  }
  else
  {
    if (ledpos&(1UL<<pos))
      PORTB = 0xFF & ~ptr;
    else
      PORTB = 0xff;
    cpt++;
    ptr <<= 1;
  }
}

//---------------------------------
void mux()
{
  pB = 0;
  switch (row)
  {
    case 0: PORTD = 0x20;
      offs = 0;
      if (PIND & 0x10)
        pB = 1;
      break;

    case 1: PORTD = 0x40;
      offs = 5;
      if (PIND & 0x10)
        pB = 2;
      break;

    case 2: PORTD = 0x80;
      offs = 10;
      if (PIND & 0x10)
        pB = 3;
      break;

    case 3: PORTD = 0x0;
      offs = 15;
      break;
  }
  pos=cpt+offs;
  ledMux1();
}

//----------------
//------------
void getIR()
{
  if (IrReceiver.decode())
  {
    uint8_t code = 0;
    /*
     * Print a summary of received data
     */
    if (IrReceiver.decodedIRData.protocol == UNKNOWN)
    {
      Serial.println(F("Received noise or an unknown (or not yet enabled) protocol"));
      // We have an unknown protocol here, print extended info
      IrReceiver.printIRResultRawFormatted(&Serial, true);
      IrReceiver.resume(); // Do it here, to preserve raw data for printing with printIRResultRawFormatted()
    }
    else
    {
      IrReceiver.resume(); // Early enable receiving of the next IR frame
      // IrReceiver.printIRResultShort(&Serial);
      // IrReceiver.printIRSendUsage(&Serial);
      code = IrReceiver.decodedIRData.command;
      //Serial.println(code, HEX);
      switch (code)
      {

      case 2:        //0x19 reel
        if (att < 19)
          att++;
        break;

      case 0x98:    //0x16
        if (att > 0)
          att--;
        break;

      case 0x47:
        mute = !mute;
        Serial.println("IR");
        //PORTC = mute;
        break;

      default:
        break;
      }
      Serial.println(att);
    }
  }
}

//-----------------------------------------
void setup()
{
  Serial.begin(115200);
  DDRC = 1;
  DDRB = 0xff;
  DDRD = 0xFF;
  PORTB = 0;
  tempo = millis() + dly;
  Serial.println(F("START " __FILE__ " from " __DATE__ "\r\nUsing library version " VERSION_IRREMOTE));

  // Start the receiver and if not 3. parameter specified, take LED_BUILTIN pin from the internal boards definition as default feedback LED
  IrReceiver.begin(IR_RECEIVE_PIN, ENABLE_LED_FEEDBACK);

  Serial.print(F("Ready to receive IR signals of protocols: "));
  printActiveIRProtocols(&Serial);
  Serial.println(F("at pin " STR(IR_RECEIVE_PIN)));
}

//--------------------------------
void loop() {
  if (millis() > tempo)
  {
    mux();
    tempo = millis() + dly;
    readP1();
    pbTimer++;
    if (pbTimer > 100)
    {
      pbTimer = 0;
      switch (pB)
      {
        case 1: if (att < 19)
            att++;
          break;

        case 2: if (att > 0)att--;
          break;

        case 3: mute = !mute;
          Serial.println(mute);
          PORTC = mute;
          break;
      }
    }
  }
 getIR();
}