//##############################################################################
int crc16(char* string, int length) 
{
    int     crc = 0xFFFF;


    for (int x = 0;  x < length; x++ ) {
         crc =  crc ^ string[x];
        for (int y = 0;  y < 8; y++) {
            if ( (crc & 0x0001) == 0x0001 ) {
                crc = ( (crc >> 1 ) ^ 0xA001 );
            }
            else {
                crc = crc >> 1;
            }
        }
    }


    return crc;
}