code4b6b.h

tinyos-2.x.rar

/* -*- mode:c++; indent-tabs-mode: nil -*-
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/**
 * provide functions to encode/decode a 4b 6b stream
 * @author Andreas Koepke <[e-mail]>
 * Book:     RF Monolithics, Inc: ASH Transceiver Designer's Guide, Okt 2002.
 * http://www.rfm.com/products/tr_des24.pdf
 */

#ifndef CODE_4B_6B_H
#define CODE_4B_6B_H

enum {
    ILLEGAL_CODE = 0xff,
    ENCODED_32KHZ_BYTE_TIME = 3*TDA5250_32KHZ_BYTE_TIME/2
};

const uint8_t nibbleToSixBit[] = {
    13, // 001101
    14, // 001110
    19, // 010011
    21, // 010101
    22, // 010110
    25, // 011001
    26, // 011010
    28, // 011100
    35, // 100011
    37, // 100101
    38, // 100110
    41, // 101001
    42, // 101010
    44, // 101100
    50, // 110010
    52  // 110100
};

const uint8_t sixBitToNibble[] = {
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    0x00,
    0x01,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    0x02,
    ILLEGAL_CODE,
    0x03,
    0x04,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    0x05,
    0x06,
    ILLEGAL_CODE,
    0x07,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    0x08,
    ILLEGAL_CODE,
    0x09,
    0x0a,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    0x0b,
    0x0c,
    ILLEGAL_CODE,
    0x0d,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    0x0e,
    ILLEGAL_CODE,
    0x0f,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE,
    ILLEGAL_CODE
};

#endif