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102 lines
2.7 KiB
102 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-only
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/**
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* Digital Voice Modem - Hotspot Firmware
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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 / Hotspot Firmware
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* @derivedfrom MMDVM_HS (https://github.com/g4klx/MMDVM_HS)
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* @license GPLv2 License (https://opensource.org/licenses/GPL-2.0)
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*
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* Copyright (C) 2015,2016,2017 Jonathan Naylor, G4KLX
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* Copyright (C) 2017,2018 Andy Uribe, CA6JAU
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* Copyright (C) 2021 Bryan Biedenkapp, N2PLL
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*
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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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