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NXDN first cut, not working yet.

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This commit is contained in:
Jonathan Naylor 2018-01-10 20:30:35 +00:00
parent 78a51d416d
commit b5ca5e3839
16 changed files with 1005 additions and 23 deletions
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54
NXDNDefines.h Normal file
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/*
* Copyright (C) 2016,2017,2018 by Jonathan Naylor G4KLX
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if !defined(NXDNDEFINES_H)
#define NXDNDEFINES_H
const unsigned int NXDN_RADIO_SYMBOL_LENGTH = 5U; // At 24 kHz sample rate
const unsigned int NXDN_FRAME_LENGTH_BYTES = 120U;
const unsigned int NXDN_FRAME_LENGTH_BITS = NXDN_FRAME_LENGTH_BYTES * 8U;
const unsigned int NXDN_FRAME_LENGTH_SYMBOLS = NXDN_FRAME_LENGTH_BYTES * 4U;
const unsigned int NXDN_FRAME_LENGTH_SAMPLES = NXDN_FRAME_LENGTH_SYMBOLS * NXDN_RADIO_SYMBOL_LENGTH;
const unsigned int NXDN_SYNC_LENGTH_BYTES = 5U;
const unsigned int NXDN_SYNC_LENGTH_BITS = NXDN_SYNC_LENGTH_BYTES * 8U;
const unsigned int NXDN_SYNC_LENGTH_SYMBOLS = NXDN_SYNC_LENGTH_BYTES * 4U;
const unsigned int NXDN_SYNC_LENGTH_SAMPLES = NXDN_SYNC_LENGTH_SYMBOLS * NXDN_RADIO_SYMBOL_LENGTH;
const unsigned int NXDN_FICH_LENGTH_BITS = 200U;
const unsigned int NXDN_FICH_LENGTH_SYMBOLS = 100U;
const unsigned int NXDN_FICH_LENGTH_SAMPLES = NXDN_FICH_LENGTH_SYMBOLS * NXDN_RADIO_SYMBOL_LENGTH;
const uint8_t NXDN_SYNC_BYTES[] = {0xD4U, 0x71U, 0xC9U, 0x63U, 0x4DU};
const uint8_t NXDN_SYNC_BYTES_LENGTH = 5U;
const uint64_t NXDN_SYNC_BITS = 0x000000D471C9634DU;
const uint64_t NXDN_SYNC_BITS_MASK = 0x000000FFFFFFFFFFU;
// D 4 7 1 C 9 6 3 4 D
// 11 01 01 00 01 11 00 01 11 00 10 01 01 10 00 11 01 00 11 01
// -3 +3 +3 +1 +3 -3 +1 +3 -3 +1 -1 +3 +3 -1 +3 -3 +3 +1 -3 +3
const int8_t NXDN_SYNC_SYMBOLS_VALUES[] = {-3, +3, +3, +1, +3, -3, +1, +3, -3, +1, -1, +3, +3, -1, +3, -3, +3, +1, -3, +3};
const uint32_t NXDN_SYNC_SYMBOLS = 0x0007B5ADU;
const uint32_t NXDN_SYNC_SYMBOLS_MASK = 0x000FFFFFU;
#endif