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113 lines
3.9 KiB
113 lines
3.9 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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* Copyright (C) 2022 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/CSBK_ALOHA.h"
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#include "Log.h"
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#include "Utils.h"
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using namespace dmr::lc::csbk;
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using namespace dmr::lc;
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using namespace dmr;
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#include <cassert>
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#include <cmath>
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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_ALOHA class.
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/// </summary>
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CSBK_ALOHA::CSBK_ALOHA() : CSBK(),
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m_siteTSSync(false),
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m_alohaMask(0U),
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m_backoffNo(1U),
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m_nRandWait(DEFAULT_NRAND_WAIT)
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{
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m_CSBKO = CSBKO_ALOHA;
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}
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/// <summary>
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/// Decode a control signalling block.
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/// </summary>
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/// <param name="data"></param>
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/// <returns>True, if CSBK was decoded, otherwise false.</returns>
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bool CSBK_ALOHA::decode(const uint8_t* data)
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{
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assert(data != NULL);
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/* stub */
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return true;
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}
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/// <summary>
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/// Encode a control signalling block.
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/// </summary>
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/// <param name="data"></param>
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void CSBK_ALOHA::encode(uint8_t* data)
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{
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assert(data != NULL);
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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) + (m_nRandWait & 0x0FU); // Random Access Wait
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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 Radio Address
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std::unique_ptr<uint8_t[]> csbk = CSBK::fromValue(csbkValue);
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CSBK::encode(data, csbk.get());
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}
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// ---------------------------------------------------------------------------
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// Private Class Members
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// ---------------------------------------------------------------------------
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/// <summary>
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/// Internal helper to copy the the class.
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/// </summary>
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/// <param name="data"></param>
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void CSBK_ALOHA::copy(const CSBK_ALOHA& data)
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{
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CSBK::copy(data);
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m_siteTSSync = data.m_siteTSSync;
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m_alohaMask = data.m_alohaMask;
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m_backoffNo = data.m_backoffNo;
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m_nRandWait = data.m_nRandWait;
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}
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