package test.protocol.musatel;

public class MusatelProtocol 
{
    public static final byte ACK_DEM_USE = (byte)0x81;
    public static final byte ACK_DEM_SER = (byte)0x82;
    public static final byte ACK_ENV_ALA = (byte)0x83;
    public static final byte ORD_FON_ON = (byte)0x41;
    public static final byte ORD_FON_OFF = (byte)0x42;
    public static final byte ORD_TON_ON = (byte)0x43;
    public static final byte ORD_TON_OFF = (byte)0x44;
    public static final byte ORD_TST_FON = (byte)0x45;
    public static final byte ORD_TST_MAN = (byte)0x46;
    public static final byte ORD_ESC_HOR = (byte)0x47;
    public static final byte ORD_ESC_IO = (byte)0x48;
    public static final byte ORD_LEC_IO = (byte)0x49;
    public static final byte ORD_VOZ_ON = (byte)0x4A;
    public static final byte ORD_VOZ_OFF = (byte)0x4B;
    public static final byte ORD_ADJ_VOL = (byte)0x4C;
    public static final byte ORD_POS_ATE = (byte)0x4D;
    public static final byte DEM_USE = (byte)0x21;
    public static final byte DEM_SER = (byte)0x22;
    public static final byte ENV_ALA = (byte)0x23;
    public static final byte ACK_FON_ON = (byte)0x84;
    public static final byte ACK_FON_OFF = (byte)0x85;
    public static final byte ACK_TON_ON = (byte)0x86;
    public static final byte ACK_TON_OFF = (byte)0x87;
    public static final byte RES_TST_FON = (byte)0x88;
    public static final byte RES_TST_MAN = (byte)0x89;
    public static final byte ACK_ESC_HOR = (byte)0x8A;
    public static final byte ACK_ESC_IO = (byte)0x8B;
    public static final byte ACK_LEC_IO = (byte)0x8C;
    public static final byte ACK_VOZ_ON = (byte)0x8D;
    public static final byte ACK_ADJ_VOL = (byte)0x8E;
    public static final byte P_MAS = (byte)0x90;
    public static final byte P_ESC = (byte)0x91;
    public static final byte L_ESP = (byte)0x51;
    public static final byte L_FON = (byte)0x52;
    public static final byte T_LLA = (byte)0x53;
    public static final byte T_COM = (byte)0x54;
    public static final byte MEM_FUE_SER = (byte)0x55;
    public static final byte MEM_LLA_ESP = (byte)0x56;
    public static final byte TST_OK = (byte)0x57;
    public static final byte TST_FAL = (byte)0x58;
    public static final byte RES_POS_ATE = (byte)0x0F;
    public static final byte ORD_MOD_ON = (byte)0x4E;
    public static final byte ACK_MOD_ON = (byte)0xA0;
    public static final byte ORD_MOD_OFF = (byte)0x4F;
    public static final byte ACK_MOD_OFF = (byte)0xA1;
    public static final byte ORD_REN_ON = (byte)0x60;
    public static final byte ACK_VOZ_OFF = (byte)0x92;
    public static final byte ACK_REN_ON = (byte)0x93;
    public static final byte ORD_ADJ_ATE = (byte)0xE0;
    public static final byte ACK_ADJ_ATE = (byte)0xF0;
    public static final byte ORD_ADJ_ATS = (byte)0xE1;
    public static final byte ACK_ADJ_ATS = (byte)0xF1;
    public static final byte ORD_POS_ATS = (byte)0xE2;
    public static final byte RES_POS_ATS = (byte)0xF2;
    public static final byte ORD_CONF_PER = (byte)0xE3;
    public static final byte ACK_CONF_PER = (byte)0xF3;
    public static final byte ORD_PARTICULAR = (byte)0xC3;
    public static final byte ASIGNAR_CC = (byte)0xB4;
    public static final byte NACK = (byte)0x15;
    public static final byte OTRO_CC_ASIGNADO = (byte)0x10;

    
    /******************************************************************************
     *  Compilation:  javac CRC16CCITT
     *  Reads in a sequence of bytes and prints out its 16 bit
     *  Cylcic Redundancy Check (CRC-CCIIT 0xFFFF).
     *  1 + x + x^5 + x^12 + x^16 is irreducible polynomial.
     *  % java CRC16-CCITT 123456789
     *  CRC16-CCITT = 29b1
     ******************************************************************************/
     
     
     protected int CRC(byte[] data)
     {
        int crc = 0xFFFF;
        int polynomial = 0x1021;

        // byte[] testBytes = "123456789".getBytes("ASCII");

        for (byte b : data) 
        {
            for (int i = 0; i < 8; i++) 
            {
                boolean bit = ((b   >> (7-i) & 1) == 1);
                boolean c15 = ((crc >> 15    & 1) == 1);
                crc <<= 1;
                if (c15 ^ bit) crc ^= polynomial;
            }
        }

        crc &= 0xffff;
        return crc;
    }


     
}