//Приём с линии DMX512

    if(RCIF)
    {
        if(!OERR)
        {
            if(RX9D&&(!FERR))
            {//принят байт без ошибок
                tempISRhi = RCREG;
                if(dmx__wasBREAK!=false)
                {
                    if(dmx__wasSCode!=false)
                    {
                        if(dmx__curAdr >= dmx_baseAdr)
                        {
                            DMX_Array[dmx__chNum] = tempISRhi;
                            dmx__chNum++;
                            if(dmx__chNum>=maxChNum)
                            {
                                dmx__wasBREAK=false;
                                dmx_syncBREAK=true;
                            };
                        }
                        else dmx__curAdr++;
                    }
                    else
                    {//проверяем на стартовый код
                        if(tempISRhi==0x00)
                        {
                            dmx__wasSCode = true;
                            dmx_error = false;
                            dmx_tmrDMX = 0;
                        }
                        else dmx__wasBREAK=false;
                    };
                };
            }
            else
            {//детектирование сигнала BREAK (ошибка кадра или отсутствие стопового бита)
                dmx__curAdr = 0;
                dmx__chNum = 0;
                if(dmx__wasBREAK==true)dmx_syncBREAK=true;
                dmx__wasBREAK = true;
                dmx__wasSCode = false;
                tempISRhi = RCREG;
            };
        }
        else
        {//переполнение аппаратного буфера
            dmx_error = true;
            dmx__wasBREAK = false;
            slaveStart = false;
            CREN = 0;
            CREN = 1;
            while(RCIF)tempISRhi = RCREG;
        };
    };



...



    //таймер ошибки DMX (~1,2 сек.)
    dmx_tmrDMX++;
    if(dmx_tmrDMX==75)
    {
        dmx_error = true;
        dmx_tmrDMX--;
    };

// somewhere in code
   dmx_tmrDMX = MAX_DMXTMR_TIME;
...
   //таймер ошибки DMX (~1,2 сек.)
   if(dmx_tmrDMX)
      if(!--dmx_tmrDMX)
      {
         dmx_error = true;
         ...
      };