// SPDX-License-Identifier: GPL-2.0-only
/**
* Digital Voice Modem - Hotspot Firmware
* GPLv2 Open Source. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* @package DVM / Hotspot Firmware
* @derivedfrom MMDVM_HS (https://github.com/g4klx/MMDVM_HS)
* @license GPLv2 License (https://opensource.org/licenses/GPL-2.0)
*
*   Copyright (C) 2016,2017,2018 Jonathan Naylor, G4KLX
*
*/
#if !defined(__NXDN_DEFINES_H__)
#define __NXDN_DEFINES_H__

#include "Defines.h"

namespace nxdn
{
    // ---------------------------------------------------------------------------
    //  Constants
    // ---------------------------------------------------------------------------

    const uint32_t  NXDN_RADIO_SYMBOL_LENGTH = 10U;      // At 24 kHz sample rate

    const uint32_t  NXDN_FRAME_LENGTH_BITS = 384U;
    const uint32_t  NXDN_FRAME_LENGTH_BYTES = NXDN_FRAME_LENGTH_BITS / 8U;
    const uint32_t  NXDN_FRAME_LENGTH_SYMBOLS = NXDN_FRAME_LENGTH_BITS / 2U;
    const uint32_t  NXDN_FRAME_LENGTH_SAMPLES = NXDN_FRAME_LENGTH_SYMBOLS * NXDN_RADIO_SYMBOL_LENGTH;

    const uint32_t  NXDN_FSW_LENGTH_BITS = 20U;
    const uint32_t  NXDN_FSW_LENGTH_SYMBOLS = NXDN_FSW_LENGTH_BITS / 2U;
    const uint32_t  NXDN_FSW_LENGTH_SAMPLES = NXDN_FSW_LENGTH_SYMBOLS * NXDN_RADIO_SYMBOL_LENGTH;

    const uint8_t   NXDN_FSW_BYTES[] = { 0xCDU, 0xF5U, 0x90U };
    const uint8_t   NXDN_FSW_BYTES_MASK[] = { 0xFFU, 0xFFU, 0xF0U };
    const uint8_t   NXDN_FSW_BYTES_LENGTH = 3U;

    const uint32_t  NXDN_FSW_BITS = 0x000CDF59U;
    const uint32_t  NXDN_FSW_BITS_MASK = 0x000FFFFFU;

    const uint8_t   NXDN_PREAMBLE[] = { 0x57U, 0x75U, 0xFDU };
    const uint8_t   NXDN_SYNC = 0x5FU;

    // C     D      F     5      9
    // 11 00 11 01  11 11 01 01  10 01
    // -3 +1 -3 +3  -3 -3 +3 +3  -1 +3

    const int8_t    NXDN_FSW_SYMBOLS_VALUES[] = {-3, +1, -3, +3, -3, -3, +3, +3, -1, +3};

    const uint16_t  NXDN_FSW_SYMBOLS = 0x014DU;
    const uint16_t  NXDN_FSW_SYMBOLS_MASK = 0x03FFU;

    // 538 = NXDN_FRAME_LENGTH_BYTES * 11 + 10 (BUFFER_LEN = NXDN_FRAME_LENGTH_BYTES * NO_OF_FRAMES)
    const uint32_t  NXDN_TX_BUFFER_LEN = 538U; // 11 frames + pad
} // namespace nxdn

#endif // __NXDN_DEFINES_H__