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118 lines
3.5 KiB
118 lines
3.5 KiB
/**
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* Digital Voice Modem - DSP Firmware (Hotspot)
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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 / DSP Firmware (Hotspot)
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*
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*/
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//
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// Based on code from the MMDVM_HS project. (https://github.com/juribeparada/MMDVM_HS)
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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) 2015,2016,2017 by Jonathan Naylor G4KLX
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* Copyright (C) 2017,2018 by Andy Uribe CA6JAU
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* Copyright (C) 2021 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(__DMR_SLOT_RX_H__)
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#define __DMR_SLOT_RX_H__
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#include "Defines.h"
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#include "dmr/DMRDefines.h"
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#if defined(DUPLEX)
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namespace dmr
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{
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// ---------------------------------------------------------------------------
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// Constants
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// ---------------------------------------------------------------------------
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const uint16_t DMR_BUFFER_LENGTH_BITS = 576U;
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enum DMRRX_STATE {
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DMRRXS_NONE,
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DMRRXS_VOICE,
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DMRRXS_DATA
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};
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// ---------------------------------------------------------------------------
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// Class Declaration
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// Implements receiver logic for DMR slots.
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// ---------------------------------------------------------------------------
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class DSP_FW_API DMRSlotRX {
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public:
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/// <summary>Initializes a new instance of the DMRSlotRX class.</summary>
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DMRSlotRX(bool slot);
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/// <summary>Helper to set data values for start of Rx.</summary>
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void start();
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/// <summary>Helper to reset data values to defaults.</summary>
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void reset();
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/// <summary>Sample DMR bits from the air interface.</summary>
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bool databit(bool bit);
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/// <summary>Sets the DMR color code.</summary>
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void setColorCode(uint8_t colorCode);
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/// <summary>Sets the number of samples to delay before processing.</summary>
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void setRxDelay(uint8_t delay);
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private:
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bool m_slot;
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uint64_t m_bitBuffer;
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uint8_t m_buffer[DMR_BUFFER_LENGTH_BITS / 8U]; // 72 bytes
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uint16_t m_dataPtr;
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uint16_t m_syncPtr;
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uint16_t m_startPtr;
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uint16_t m_endPtr;
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uint16_t m_delayPtr;
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uint8_t m_control;
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uint8_t m_syncCount;
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uint8_t m_colorCode;
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uint16_t m_delay;
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DMRRX_STATE m_state;
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uint8_t m_n;
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uint8_t m_type;
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/// <summary>Frame synchronization correlator.</summary>
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void correlateSync();
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/// <summary></summary>
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void resetSlot();
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/// <summary></summary>
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void bitsToBytes(uint16_t start, uint8_t count, uint8_t* buffer);
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/// <summary></summary>
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void writeRSSIData(uint8_t* frame);
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};
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} // namespace dmr
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#endif // DUPLEX
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#endif // __DMR_SLOT_RX_H__
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