158 lines
3.9 KiB
C++
158 lines
3.9 KiB
C++
/*
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* Copyright (C) 2010-2014,2016,2017,2018 by Jonathan Naylor G4KLX
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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 "APRSWriter.h"
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#include <cstdio>
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#include <cassert>
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#include <cstring>
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#include <cmath>
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CAPRSWriter::CAPRSWriter(const std::string& callsign, const std::string& suffix, const std::string& password, const std::string& address, unsigned int port) :
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m_thread(NULL),
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m_enabled(false),
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m_idTimer(1000U, 20U * 60U), // 20 minutes
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m_callsign(callsign),
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m_txFrequency(0U),
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m_rxFrequency(0U),
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m_latitude(0.0F),
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m_longitude(0.0F),
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m_height(0),
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m_desc()
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{
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assert(!callsign.empty());
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assert(!password.empty());
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assert(!address.empty());
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assert(port > 0U);
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if (!suffix.empty()) {
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m_callsign.append("-");
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m_callsign.append(suffix.substr(0U, 1U));
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}
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m_thread = new CAPRSWriterThread(m_callsign, password, address, port);
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}
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CAPRSWriter::~CAPRSWriter()
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{
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}
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void CAPRSWriter::setInfo(unsigned int txFrequency, unsigned int rxFrequency, float latitude, float longitude, int height, const std::string& desc)
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{
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m_txFrequency = txFrequency;
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m_rxFrequency = rxFrequency;
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m_latitude = latitude;
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m_longitude = longitude;
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m_height = height;
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m_desc = desc;
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}
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bool CAPRSWriter::open()
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{
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m_idTimer.start();
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return m_thread->start();
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}
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void CAPRSWriter::write(const char* data)
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{
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assert(data != NULL);
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m_thread->write(data);
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}
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void CAPRSWriter::clock(unsigned int ms)
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{
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m_idTimer.clock(ms);
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if (m_idTimer.hasExpired()) {
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sendIdFrames();
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m_idTimer.start();
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}
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}
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void CAPRSWriter::close()
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{
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m_thread->stop();
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}
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void CAPRSWriter::sendIdFrames()
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{
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if (!m_thread->isConnected())
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return;
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// Default values aren't passed on
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if (m_latitude == 0.0F && m_longitude == 0.0F)
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return;
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char desc[200U];
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if (m_txFrequency != 0U) {
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float offset = float(int(m_rxFrequency) - int(m_txFrequency)) / 1000000.0F;
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::sprintf(desc, "MMDVM Voice %.5LfMHz %c%.4lfMHz%s%s",
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(long double)(m_txFrequency) / 1000000.0F,
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offset < 0.0F ? '-' : '+',
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::fabs(offset), m_desc.empty() ? "" : ", ", m_desc.c_str());
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} else {
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::sprintf(desc, "MMDVM Voice%s%s", m_desc.empty() ? "" : ", ", m_desc.c_str());
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}
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const char* band = "4m";
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if (m_txFrequency >= 1200000000U)
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band = "1.2";
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else if (m_txFrequency >= 420000000U)
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band = "440";
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else if (m_txFrequency >= 144000000U)
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band = "2m";
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else if (m_txFrequency >= 50000000U)
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band = "6m";
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else if (m_txFrequency >= 28000000U)
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band = "10m";
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double tempLat = ::fabs(m_latitude);
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double tempLong = ::fabs(m_longitude);
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double latitude = ::floor(tempLat);
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double longitude = ::floor(tempLong);
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latitude = (tempLat - latitude) * 60.0 + latitude * 100.0;
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longitude = (tempLong - longitude) * 60.0 + longitude * 100.0;
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char lat[20U];
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::sprintf(lat, "%07.2lf", latitude);
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char lon[20U];
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::sprintf(lon, "%08.2lf", longitude);
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std::string server = m_callsign;
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size_t pos = server.find_first_of('-');
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if (pos == std::string::npos)
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server.append("-S");
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else
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server.append("S");
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char output[500U];
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::sprintf(output, "%s>APDG04,TCPIP*,qAC,%s:!%s%cD%s%c&/A=%06.0f%s %s",
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m_callsign.c_str(), server.c_str(),
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lat, (m_latitude < 0.0F) ? 'S' : 'N',
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lon, (m_longitude < 0.0F) ? 'W' : 'E',
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float(m_height) * 3.28F, band, desc);
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m_thread->write(output);
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m_idTimer.start();
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}
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