dcs.c

/* Copyright 2023 Dual Tachyon
 * https://github.com/DualTachyon
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */
#include "driver/eeprom.h"
#include "dcs.h"

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#endif


#ifdef TEST_UNDE_CTCSS

const uint16_t CTCSS_Options[50] = {
     200,  693,  719,  744,  770,  797,  825,  854,  885,  915,
     948,  974, 1000, 1035, 1072, 1109, 1148, 1188, 1230, 1273,
    1318, 1365, 1413, 1462, 1514, 1567, 1598, 1622, 1655, 1679,
    1713, 1738, 1773, 1799, 1835, 1862, 1899, 1928, 1966, 1995,
    2035, 2065, 2107, 2181, 2257, 2291, 2336, 2418, 2503, 2541
};
#else
//CTCSS Hz * 10
#if ENABLE_CHINESE_FULL == 0 || defined(ENABLE_ENGLISH)
const uint16_t CTCSS_Options[50] = {
        670, 693, 719, 744, 770, 797, 825, 854, 885, 915,
        948, 974, 1000, 1035, 1072, 1109, 1148, 1188, 1230, 1273,
        1318, 1365, 1413, 1462, 1514, 1567, 1598, 1622, 1655, 1679,
        1713, 1738, 1773, 1799, 1835, 1862, 1899, 1928, 1966, 1995,
        2035, 2065, 2107, 2181, 2257, 2291, 2336, 2418, 2503, 2541
};
#endif
#endif

#if ENABLE_CHINESE_FULL == 0|| defined(ENABLE_ENGLISH)

const uint16_t DCS_Options[104] = {
        0x0013, 0x0015, 0x0016, 0x0019, 0x001A, 0x001E, 0x0023, 0x0027,
        0x0029, 0x002B, 0x002C, 0x0035, 0x0039, 0x003A, 0x003B, 0x003C,
        0x004C, 0x004D, 0x004E, 0x0052, 0x0055, 0x0059, 0x005A, 0x005C,
        0x0063, 0x0065, 0x006A, 0x006D, 0x006E, 0x0072, 0x0075, 0x007A,
        0x007C, 0x0085, 0x008A, 0x0093, 0x0095, 0x0096, 0x00A3, 0x00A4,
        0x00A5, 0x00A6, 0x00A9, 0x00AA, 0x00AD, 0x00B1, 0x00B3, 0x00B5,
        0x00B6, 0x00B9, 0x00BC, 0x00C6, 0x00C9, 0x00CD, 0x00D5, 0x00D9,
        0x00DA, 0x00E3, 0x00E6, 0x00E9, 0x00EE, 0x00F4, 0x00F5, 0x00F9,
        0x0109, 0x010A, 0x010B, 0x0113, 0x0119, 0x011A, 0x0125, 0x0126,
        0x012A, 0x012C, 0x012D, 0x0132, 0x0134, 0x0135, 0x0136, 0x0143,
        0x0146, 0x014E, 0x0153, 0x0156, 0x015A, 0x0166, 0x0175, 0x0186,
        0x018A, 0x0194, 0x0197, 0x0199, 0x019A, 0x01AC, 0x01B2, 0x01B4,
        0x01C3, 0x01CA, 0x01D3, 0x01D9, 0x01DA, 0x01DC, 0x01E3, 0x01EC,
};
#endif

static uint32_t DCS_CalculateGolay(uint32_t CodeWord) {
    unsigned int i;
    uint32_t Word = CodeWord;
    for (i = 0; i < 12; i++) {
        Word <<= 1;
        if (Word & 0x1000)
            Word ^= 0x08EA;
    }
    return CodeWord | ((Word & 0x0FFE) << 11);
}

uint32_t DCS_GetGolayCodeWord(DCS_CodeType_t CodeType, uint8_t Option) {

#if ENABLE_CHINESE_FULL == 0 || defined(ENABLE_ENGLISH)
    uint32_t Code = DCS_CalculateGolay(DCS_Options[Option] + 0x800U);

#else
    uint8_t read_tmp[2];
EEPROM_ReadBuffer(0x02C64+(Option)*2, read_tmp, 2);
uint16_t DCS_Options_read=read_tmp[0]|(read_tmp[1]<<8);
uint32_t Code = DCS_CalculateGolay(DCS_Options_read + 0x800U);


#endif

//	uint32_t Code = DCS_CalculateGolay(DCS_Options[Option] + 0x800U);
    if (CodeType == CODE_TYPE_REVERSE_DIGITAL)
        Code ^= 0x7FFFFF;
    return Code;
}

uint8_t DCS_GetCdcssCode(uint32_t Code) {
    unsigned int i;
    for (i = 0; i < 23; i++) {
        uint32_t Shift;

        if (((Code >> 9) & 0x7U) == 4) {
            unsigned int j;


            for (j = 0; j < 104; j++) {
#if ENABLE_CHINESE_FULL == 0 || defined(ENABLE_ENGLISH)
                if (DCS_Options[j] == (Code & 0x1FF))

#else
                    uint8_t read_tmp[2];
        EEPROM_ReadBuffer(0x02C64+(j)*2, read_tmp, 2);
        uint16_t DCS_Options_read=read_tmp[0]|(read_tmp[1]<<8);
            if (DCS_Options_read == (Code & 0x1FF))


#endif
                    if (DCS_GetGolayCodeWord(2, j) == Code)
                        return j;
            }
        }

        Shift = Code >> 1;
        if (Code & 1U)
            Shift |= 0x400000U;
        Code = Shift;
    }

    return 0xFF;
}

uint8_t DCS_GetCtcssCode(int Code) {
    unsigned int i;
    uint8_t Result = 0xFF;
    int Smallest = 50;

    for (i = 0; i < 50; i++) {

#if ENABLE_CHINESE_FULL == 0 || defined(ENABLE_ENGLISH)
        int Delta = Code - CTCSS_Options[i];
        if (Delta < 0)
            Delta = -(Code - CTCSS_Options[i]);
#else
        uint8_t read_tmp[2];
        EEPROM_ReadBuffer(0x02C00+i*2, read_tmp, 2);
        uint16_t CTCSS_Options_read=read_tmp[0]|(read_tmp[1]<<8);

        int Delta = Code - CTCSS_Options_read;
        if (Delta < 0)
            Delta = -(Code - CTCSS_Options_read);
#endif
        if (Smallest > Delta) {
            Smallest = Delta;
            Result = i;
        }
    }

    return Result;
}

#ifdef TEST_UNDE_CTCSS

uint16_t DCS_GetCtcssCode_ALL(int Code)
{
    unsigned int i;
    uint16_t      Result = 0xFFFF;
    int          Smallest = 50;

    for (i = 0; i <2550; i++)
    {
        int Delta = Code - i;
        if (Delta < 0)
            Delta = -(Code - i);
        if (Smallest > Delta)
        {
            Smallest = Delta;
            Result   = i;
        }
    }

    return Result;
}
#endif