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80 lines
2.9 KiB
80 lines
2.9 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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// 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) 2021 by Jonathan Naylor G4KLX
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* Copyright (C) 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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#if !defined(__MODEM_NULL_PORT_H__)
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#define __MODEM_NULL_PORT_H__
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#include "Defines.h"
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#include "modem/port/IModemPort.h"
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#include "RingBuffer.h"
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namespace modem
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{
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namespace port
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{
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// ---------------------------------------------------------------------------
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// Class Declaration
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// This class implements low-level routines that represent a "null"
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// modem port.
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// ---------------------------------------------------------------------------
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class HOST_SW_API ModemNullPort : public IModemPort {
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public:
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/// <summary>Initializes a new instance of the ModemNullPort class.</summary>
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ModemNullPort();
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/// <summary>Finalizes a instance of the ModemNullPort class.</summary>
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virtual ~ModemNullPort();
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/// <summary>Opens a connection to the port.</summary>
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virtual bool open();
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/// <summary>Reads data from the port.</summary>
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virtual int read(uint8_t* buffer, uint32_t length);
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/// <summary>Writes data to the port.</summary>
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virtual int write(const uint8_t* buffer, uint32_t length);
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/// <summary>Closes the connection to the port.</summary>
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virtual void close();
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private:
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RingBuffer<unsigned char> m_buffer;
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/// <summary>Helper to return a faked modem version.</summary>
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void getVersion();
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/// <summary>Helper to return a faked modem status.</summary>
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void getStatus();
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/// <summary>Helper to write a faked modem acknowledge.</summary>
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void writeAck(uint8_t type);
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};
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} // namespace port
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} // namespace modem
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#endif // __MODEM_NULL_PORT_H__
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