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526 lines
22 KiB
526 lines
22 KiB
/**
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* Digital Voice Modem - Host Software
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* @package DVM / Host Software
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*
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*/
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//
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// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
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// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
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//
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/*
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* Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
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* Copyright (C) 2019-2021 by Bryan Biedenkapp N2PLL
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "Defines.h"
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#include "dmr/lc/CSBK.h"
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#include "edac/BPTC19696.h"
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#include "edac/CRC.h"
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#include "Log.h"
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#include "Utils.h"
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using namespace dmr::lc;
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using namespace dmr;
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#include <cstdio>
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#include <cassert>
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// ---------------------------------------------------------------------------
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// Public Class Members
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// ---------------------------------------------------------------------------
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/// <summary>
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/// Initializes a new instance of the CSBK class.
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/// </summary>
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/// <param name="siteData"></param>
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/// <param name="entry"></param>
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CSBK::CSBK(SiteData siteData, lookups::IdenTable entry) : CSBK(siteData)
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{
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m_siteIdenEntry = entry;
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}
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/// <summary>
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/// Initializes a new instance of the CSBK class.
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/// </summary>
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/// <param name="siteData"></param>
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/// <param name="entry"></param>
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/// <param name="verbose"></param>
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CSBK::CSBK(SiteData siteData, lookups::IdenTable entry, bool verbose) : CSBK(siteData)
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{
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m_verbose = verbose;
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m_siteIdenEntry = entry;
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}
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/// <summary>
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/// Finalizes a instance of the CSBK class.
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/// </summary>
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CSBK::~CSBK()
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{
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delete[] m_data;
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}
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/// <summary>
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/// Decodes a DMR CSBK.
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/// </summary>
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/// <param name="bytes"></param>
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/// <returns>True, if DMR CSBK was decoded, otherwise false.</returns>
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bool CSBK::decode(const uint8_t* bytes)
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{
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assert(bytes != NULL);
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// decode BPTC (196,96) FEC
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edac::BPTC19696 bptc;
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bptc.decode(bytes, m_data);
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// validate the CRC-CCITT 16
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m_data[10U] ^= CSBK_CRC_MASK[0U];
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m_data[11U] ^= CSBK_CRC_MASK[1U];
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bool valid = edac::CRC::checkCCITT162(m_data, DMR_LC_HEADER_LENGTH_BYTES);
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if (!valid) {
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LogError(LOG_DMR, "CSBK::decode(), failed CRC CCITT-162 check");
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return false;
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}
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// restore the checksum
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m_data[10U] ^= CSBK_CRC_MASK[0U];
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m_data[11U] ^= CSBK_CRC_MASK[1U];
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if (m_verbose) {
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Utils::dump(2U, "Decoded CSBK", m_data, DMR_LC_HEADER_LENGTH_BYTES);
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}
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m_CSBKO = m_data[0U] & 0x3FU; // CSBKO
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m_lastBlock = (m_data[0U] & 0x80U) == 0x80U; // Last Block Marker
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m_FID = m_data[1U]; // Feature ID
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switch (m_CSBKO) {
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case CSBKO_BSDWNACT:
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m_GI = false;
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m_bsId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Base Station ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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m_dataContent = false;
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m_CBF = 0U;
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break;
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case CSBKO_UU_V_REQ:
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m_GI = false;
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m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Destination ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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m_dataContent = false;
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m_CBF = 0U;
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break;
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case CSBKO_UU_ANS_RSP:
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m_GI = false;
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m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Destination ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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m_dataContent = false;
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m_CBF = 0U;
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break;
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case CSBKO_PRECCSBK:
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m_GI = (m_data[2U] & 0x40U) == 0x40U;
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m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Destination ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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m_dataContent = (m_data[2U] & 0x80U) == 0x80U;
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m_CBF = m_data[3U];
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break;
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case CSBKO_RAND: // CSBKO_CALL_ALRT when FID == FID_DMRA
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switch (m_FID)
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{
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case FID_DMRA:
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m_GI = (m_data[2U] & 0x40U) == 0x40U; // Group or Individual
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m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Destination ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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m_dataContent = (m_data[2U] & 0x80U) == 0x80U; //
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m_CBF = m_data[3U]; //
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break;
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/* Tier III */
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case FID_ETSI:
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default:
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m_serviceOptions = m_data[2U]; // Service Options
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m_targetAddress = (m_data[3U] >> 6 & 0x03U); // Target Address
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m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Destination ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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break;
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}
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case CSBKO_ACK_RSP:
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m_GI = (m_data[2U] & 0x40U) == 0x40U;
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m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Destination ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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m_response = m_data[3U]; // Response
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m_dataContent = false;
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break;
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case CSBKO_EXT_FNCT:
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m_GI = false;
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m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Destination ID
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m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Source ID
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m_dataContent = (m_data[2U] & 0x80U) == 0x80U; //
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m_CBF = m_data[3U]; //
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break;
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case CSBKO_NACK_RSP:
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m_GI = false;
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m_srcId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U]; // Source ID
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m_dstId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U]; // Destination ID
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m_response = m_data[3U]; // Response
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m_dataContent = false;
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break;
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default:
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m_GI = false;
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m_srcId = 0U;
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m_dstId = 0U;
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m_dataContent = false;
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m_CBF = 0U;
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LogError(LOG_DMR, "CSBK::decode(), unknown CSBK type, csbko = $%02X", m_CSBKO);
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return true;
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}
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return true;
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}
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/// <summary>
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/// Encodes a DMR CSBK.
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/// </summary>
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/// <param name="bytes"></param>
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void CSBK::encode(uint8_t* bytes)
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{
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assert(bytes != NULL);
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m_data[0U] = m_CSBKO; // CSBKO
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m_data[0U] |= (m_lastBlock) ? 0x80U : 0x00U; // Last Block Marker
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if (!m_Cdef) {
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m_data[1U] = m_FID; // Feature ID
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}
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else {
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m_data[1U] = m_colorCode & 0x0FU; // Cdef uses Color Code
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}
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switch (m_CSBKO) {
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case CSBKO_ACK_RSP:
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m_data[2U] = (uint8_t)(m_serviceType & 0x3FU); // Service Type
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m_data[2U] |= 0x80U; // Additional Information Field (always 1)
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if (m_GI) {
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m_data[2U] |= 0x40U; // Source Type
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}
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m_data[3U] = m_response; // Reason Code
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m_data[4U] = (m_srcId >> 16) & 0xFFU; // Source ID
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m_data[5U] = (m_srcId >> 8) & 0xFFU;
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m_data[6U] = (m_srcId >> 0) & 0xFFU;
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m_data[7U] = (m_dstId >> 16) & 0xFFU; // Destination ID
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m_data[8U] = (m_dstId >> 8) & 0xFFU;
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m_data[9U] = (m_dstId >> 0) & 0xFFU;
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break;
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case CSBKO_EXT_FNCT:
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if (m_GI) {
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m_data[2U] |= 0x40U; // Group or Individual
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}
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if (m_dataContent) {
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m_data[2U] |= 0x80U; //
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}
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m_data[3U] = m_CBF; //
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m_data[4U] = (m_srcId >> 16) & 0xFFU; // Source ID
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m_data[5U] = (m_srcId >> 8) & 0xFFU;
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m_data[6U] = (m_srcId >> 0) & 0xFFU;
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m_data[7U] = (m_dstId >> 16) & 0xFFU; // Destination ID
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m_data[8U] = (m_dstId >> 8) & 0xFFU;
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m_data[9U] = (m_dstId >> 0) & 0xFFU;
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break;
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case CSBKO_NACK_RSP:
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m_data[2U] = (uint8_t)(m_serviceType & 0x3FU); // Service Type
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m_data[2U] |= 0x80U; // Additional Information Field (always 1)
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if (m_GI) {
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m_data[2U] |= 0x40U; // Source Type
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}
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m_data[3U] = m_response; // Reason Code
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m_data[4U] = (m_srcId >> 16) & 0xFFU; // Source ID
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m_data[5U] = (m_srcId >> 8) & 0xFFU;
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m_data[6U] = (m_srcId >> 0) & 0xFFU;
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m_data[7U] = (m_dstId >> 16) & 0xFFU; // Destination ID
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m_data[8U] = (m_dstId >> 8) & 0xFFU;
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m_data[9U] = (m_dstId >> 0) & 0xFFU;
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break;
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/* Tier III */
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case CSBKO_ALOHA:
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{
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ulong64_t csbkValue = 0U;
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csbkValue = (csbkValue << 2) + 0U; // Reserved
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csbkValue = (csbkValue << 1) + ((m_siteTSSync) ? 1U : 0U); // Site Time Slot Synchronization
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csbkValue = (csbkValue << 3) + DMR_ALOHA_VER_151; // DMR Spec. Version (1.5.1)
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csbkValue = (csbkValue << 1) + ((m_siteOffsetTiming) ? 1U : 0U); // Site Timing: Aligned or Offset
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csbkValue = (csbkValue << 1) + ((m_siteData.netActive()) ? 1U : 0U); // Site Networked
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csbkValue = (csbkValue << 5) + (m_alohaMask & 0x1FU); // MS Mask
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csbkValue = (csbkValue << 2) + 0U; // Service Function
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csbkValue = (csbkValue << 4) + 0U; //
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csbkValue = (csbkValue << 1) + ((m_siteData.requireReg()) ? 1U : 0U); // Require Registration
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csbkValue = (csbkValue << 4) + (m_backoffNo & 0x0FU); // Backoff Number
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csbkValue = (csbkValue << 16) + m_siteData.systemIdentity(); // Site Identity
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csbkValue = (csbkValue << 24) + m_srcId; // Source ID
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// split value into bytes
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m_data[2U] = (uint8_t)((csbkValue >> 56) & 0xFFU);
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m_data[3U] = (uint8_t)((csbkValue >> 48) & 0xFFU);
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m_data[4U] = (uint8_t)((csbkValue >> 40) & 0xFFU);
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m_data[5U] = (uint8_t)((csbkValue >> 32) & 0xFFU);
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m_data[6U] = (uint8_t)((csbkValue >> 24) & 0xFFU);
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m_data[7U] = (uint8_t)((csbkValue >> 16) & 0xFFU);
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m_data[8U] = (uint8_t)((csbkValue >> 8) & 0xFFU);
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m_data[9U] = (uint8_t)((csbkValue >> 0) & 0xFFU);
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}
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break;
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case CSBKO_PV_GRANT:
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{
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ulong64_t csbkValue = 0U;
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csbkValue = (csbkValue << 12) + (m_logicalCh1 & 0xFFFU); // Logical Physical Channel 1
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csbkValue = (csbkValue << 1) + (m_slotNo & 0x3U); // Logical Slot Number
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csbkValue = (csbkValue << 1) + 0U; // Reserved
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csbkValue = (csbkValue << 1) + 0U; // Emergency
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csbkValue = (csbkValue << 1) + ((m_siteOffsetTiming) ? 1U : 0U); // Site Timing: Aligned or Offset
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csbkValue = (csbkValue << 24) + m_dstId; // Talkgroup ID
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csbkValue = (csbkValue << 24) + m_srcId; // Source ID
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// split value into bytes
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m_data[2U] = (uint8_t)((csbkValue >> 56) & 0xFFU);
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m_data[3U] = (uint8_t)((csbkValue >> 48) & 0xFFU);
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m_data[4U] = (uint8_t)((csbkValue >> 40) & 0xFFU);
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m_data[5U] = (uint8_t)((csbkValue >> 32) & 0xFFU);
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m_data[6U] = (uint8_t)((csbkValue >> 24) & 0xFFU);
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m_data[7U] = (uint8_t)((csbkValue >> 16) & 0xFFU);
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m_data[8U] = (uint8_t)((csbkValue >> 8) & 0xFFU);
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m_data[9U] = (uint8_t)((csbkValue >> 0) & 0xFFU);
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}
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break;
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case CSBKO_TV_GRANT:
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case CSBKO_BTV_GRANT:
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{
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ulong64_t csbkValue = 0U;
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csbkValue = (csbkValue << 12) + (m_logicalCh1 & 0xFFFU); // Logical Physical Channel 1
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csbkValue = (csbkValue << 1) + (m_slotNo & 0x3U); // Logical Slot Number
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csbkValue = (csbkValue << 1) + 0U; // Late Entry
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csbkValue = (csbkValue << 1) + 0U; // Emergency
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csbkValue = (csbkValue << 1) + ((m_siteOffsetTiming) ? 1U : 0U); // Site Timing: Aligned or Offset
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csbkValue = (csbkValue << 24) + m_dstId; // Talkgroup ID
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csbkValue = (csbkValue << 24) + m_srcId; // Source ID
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// split value into bytes
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m_data[2U] = (uint8_t)((csbkValue >> 56) & 0xFFU);
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m_data[3U] = (uint8_t)((csbkValue >> 48) & 0xFFU);
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m_data[4U] = (uint8_t)((csbkValue >> 40) & 0xFFU);
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m_data[5U] = (uint8_t)((csbkValue >> 32) & 0xFFU);
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m_data[6U] = (uint8_t)((csbkValue >> 24) & 0xFFU);
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m_data[7U] = (uint8_t)((csbkValue >> 16) & 0xFFU);
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m_data[8U] = (uint8_t)((csbkValue >> 8) & 0xFFU);
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m_data[9U] = (uint8_t)((csbkValue >> 0) & 0xFFU);
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}
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break;
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case CSBKO_BROADCAST:
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{
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ulong64_t csbkValue = 0U;
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if (!m_Cdef) {
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csbkValue = m_anncType; // Announcement Type
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}
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switch (m_anncType)
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{
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case BCAST_ANNC_ANN_WD_TSCC:
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{
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// Broadcast Parms 1
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csbkValue = (csbkValue << 4) + 0U; // Reserved
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csbkValue = (csbkValue << 4) + (m_colorCode & 0x0FU); // Color Code 1
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csbkValue = (csbkValue << 4) + (m_colorCode & 0x0FU); // Color Code 2
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csbkValue = (csbkValue << 1) + ((m_annWdCh1) ? 1U : 0U); // Announce/Withdraw Channel 1
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csbkValue = (csbkValue << 1) + ((m_annWdCh2) ? 1U : 0U); // Announce/Withdraw Channel 2
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csbkValue = (csbkValue << 1) + ((m_siteData.requireReg()) ? 1U : 0U); // Require Registration
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csbkValue = (csbkValue << 4) + (m_backoffNo & 0x0FU); // Backoff Number
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csbkValue = (csbkValue << 16) + m_siteData.systemIdentity(); // Site Identity
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// Broadcast Parms 2
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csbkValue = (csbkValue << 12) + (m_logicalCh1 & 0xFFFU); // Logical Channel 1
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csbkValue = (csbkValue << 12) + (m_logicalCh2 & 0xFFFU); // Logical Channel 2
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}
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break;
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case BCAST_ANNC_CHAN_FREQ:
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{
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uint32_t calcSpace = (uint32_t)(m_siteIdenEntry.chSpaceKhz() / 0.125);
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float calcTxOffset = m_siteIdenEntry.txOffsetMhz() * 1000000;
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const uint32_t multiple = 100000;
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// calculate Rx frequency
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uint32_t rxFrequency = (uint32_t)((m_siteIdenEntry.baseFrequency() + ((calcSpace * 125) * m_logicalCh1)) + calcTxOffset);
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// generate frequency in mhz
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uint32_t rxFreqMhz = rxFrequency + multiple / 2;
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rxFreqMhz -= rxFreqMhz % multiple;
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rxFreqMhz /= multiple * 10;
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// generate khz offset
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uint32_t rxFreqKhz = rxFrequency - (rxFreqMhz * 1000000);
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// calculate Tx Frequency
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uint32_t txFrequency = (uint32_t)((m_siteIdenEntry.baseFrequency() + ((calcSpace * 125) * m_logicalCh1)));
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// generate frequency in mhz
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uint32_t txFreqMhz = txFrequency + multiple / 2;
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txFreqMhz -= txFreqMhz % multiple;
|
|
txFreqMhz /= multiple * 10;
|
|
|
|
// generate khz offset
|
|
uint32_t txFreqKhz = txFrequency - (txFreqMhz * 1000000);
|
|
|
|
csbkValue = 0U; // Cdef Type (always 0 for ANN_WD_TSCC)
|
|
csbkValue = (csbkValue << 2) + 0U; // Reserved
|
|
csbkValue = (csbkValue << 12) + (m_logicalCh1 & 0xFFFU); // Logical Channel
|
|
csbkValue = (csbkValue << 10) + (txFreqMhz & 0x7FFU); // Transmit Freq Mhz
|
|
csbkValue = (csbkValue << 13) + (txFreqKhz & 0x3FFFU); // Transmit Freq Offset Khz
|
|
csbkValue = (csbkValue << 10) + (rxFreqMhz & 0x7FFU); // Receive Freq Mhz
|
|
csbkValue = (csbkValue << 13) + (rxFreqKhz & 0x3FFFU); // Receive Freq Khz
|
|
}
|
|
break;
|
|
case BCAST_ANNC_SITE_PARMS:
|
|
{
|
|
// Broadcast Parms 1
|
|
csbkValue = (csbkValue << 14) + m_siteData.systemIdentity(true); // Site Identity (Broadcast Parms 1)
|
|
|
|
csbkValue = (csbkValue << 1) + ((m_siteData.requireReg()) ? 1U : 0U); // Require Registration
|
|
csbkValue = (csbkValue << 4) + (m_backoffNo & 0x0FU); // Backoff Number
|
|
csbkValue = (csbkValue << 16) + m_siteData.systemIdentity(); // Site Identity
|
|
|
|
// Broadcast Parms 2
|
|
csbkValue = (csbkValue << 1) + 0U; // Roaming TG Subscription/Attach
|
|
csbkValue = (csbkValue << 1) + ((m_hibernating) ? 1U : 0U); // TSCC Hibernating
|
|
csbkValue = (csbkValue << 22) + 0U; // Broadcast Parms 2 (Reserved)
|
|
}
|
|
break;
|
|
}
|
|
|
|
// split value into bytes
|
|
m_data[2U] = (uint8_t)((csbkValue >> 56) & 0xFFU);
|
|
m_data[3U] = (uint8_t)((csbkValue >> 48) & 0xFFU);
|
|
m_data[4U] = (uint8_t)((csbkValue >> 40) & 0xFFU);
|
|
m_data[5U] = (uint8_t)((csbkValue >> 32) & 0xFFU);
|
|
m_data[6U] = (uint8_t)((csbkValue >> 24) & 0xFFU);
|
|
m_data[7U] = (uint8_t)((csbkValue >> 16) & 0xFFU);
|
|
m_data[8U] = (uint8_t)((csbkValue >> 8) & 0xFFU);
|
|
m_data[9U] = (uint8_t)((csbkValue >> 0) & 0xFFU);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (m_GI) {
|
|
m_data[2U] |= 0x40U; // Group or Individual
|
|
}
|
|
|
|
if (m_dataContent) {
|
|
m_data[2U] |= 0x80U; //
|
|
}
|
|
|
|
m_data[3U] = m_CBF; //
|
|
|
|
m_data[4U] = (m_dstId >> 16) & 0xFFU; // Destination ID
|
|
m_data[5U] = (m_dstId >> 8) & 0xFFU;
|
|
m_data[6U] = (m_dstId >> 0) & 0xFFU;
|
|
|
|
m_data[7U] = (m_srcId >> 16) & 0xFFU; // Source ID
|
|
m_data[8U] = (m_srcId >> 8) & 0xFFU;
|
|
m_data[9U] = (m_srcId >> 0) & 0xFFU;
|
|
LogError(LOG_DMR, "CSBK::encode(), unknown CSBK type, csbko = $%02X", m_CSBKO);
|
|
break;
|
|
}
|
|
|
|
m_data[10U] ^= CSBK_CRC_MASK[0U];
|
|
m_data[11U] ^= CSBK_CRC_MASK[1U];
|
|
|
|
edac::CRC::addCCITT162(m_data, 12U);
|
|
|
|
m_data[10U] ^= CSBK_CRC_MASK[0U];
|
|
m_data[11U] ^= CSBK_CRC_MASK[1U];
|
|
|
|
if (m_verbose) {
|
|
Utils::dump(2U, "Encoded CSBK", m_data, DMR_LC_HEADER_LENGTH_BYTES);
|
|
}
|
|
|
|
// encode BPTC (196,96) FEC
|
|
edac::BPTC19696 bptc;
|
|
bptc.encode(m_data, bytes);
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Private Class Members
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the CSBK class.
|
|
/// </summary>
|
|
/// <param name="siteData"></param>
|
|
CSBK::CSBK(SiteData siteData) :
|
|
m_verbose(false),
|
|
m_CSBKO(CSBKO_NONE),
|
|
m_FID(0x00U),
|
|
m_lastBlock(true),
|
|
m_bsId(0U),
|
|
m_GI(false),
|
|
m_Cdef(false),
|
|
m_srcId(0U),
|
|
m_dstId(0U),
|
|
m_dataContent(false),
|
|
m_CBF(0U),
|
|
m_colorCode(0U),
|
|
m_backoffNo(1U),
|
|
m_serviceType(0U),
|
|
m_serviceOptions(0U),
|
|
m_targetAddress(TGT_ADRS_TGID),
|
|
m_response(0U),
|
|
m_anncType(BCAST_ANNC_SITE_PARMS),
|
|
m_hibernating(false),
|
|
m_annWdCh1(false),
|
|
m_logicalCh1(DMR_CHNULL),
|
|
m_annWdCh2(false),
|
|
m_logicalCh2(DMR_CHNULL),
|
|
m_slotNo(0U),
|
|
m_siteTSSync(false),
|
|
m_siteOffsetTiming(false),
|
|
m_alohaMask(0U),
|
|
m_siteData(siteData),
|
|
m_siteIdenEntry(lookups::IdenTable()),
|
|
m_data(NULL)
|
|
{
|
|
m_data = new uint8_t[12U];
|
|
}
|