You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
3.5 KiB
107 lines
3.5 KiB
/**
|
|
* Digital Voice Modem - DSP Firmware (Hotspot)
|
|
* GPLv2 Open Source. Use is subject to license terms.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* @package DVM / DSP Firmware (Hotspot)
|
|
*
|
|
*/
|
|
//
|
|
// Based on code from the MMDVM_HS project. (https://github.com/juribeparada/MMDVM_HS)
|
|
// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
|
|
//
|
|
/*
|
|
* Copyright (C) 2016,2017 by Jonathan Naylor G4KLX
|
|
* Copyright (C) 2016,2017 by Andy Uribe CA6JAU
|
|
* Copyright (C) 2021 by Bryan Biedenkapp N2PLL
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#if !defined(__P25_TX_H__)
|
|
#define __P25_TX_H__
|
|
|
|
#include "Defines.h"
|
|
#include "SerialBuffer.h"
|
|
|
|
namespace p25
|
|
{
|
|
// ---------------------------------------------------------------------------
|
|
// Constants
|
|
// ---------------------------------------------------------------------------
|
|
|
|
#define P25_FIXED_DELAY 300 // 300 = 62.49ms
|
|
// Delay Value * 0.2083 = Preamble Length (ms)
|
|
#define P25_FIXED_TAIL 600 // 600 = 500ms
|
|
|
|
enum P25TXSTATE {
|
|
P25TXSTATE_NORMAL,
|
|
P25TXSTATE_CAL
|
|
};
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Class Declaration
|
|
// Implements transmitter logic for P25 mode operation.
|
|
// ---------------------------------------------------------------------------
|
|
|
|
class DSP_FW_API P25TX {
|
|
public:
|
|
/// <summary>Initializes a new instance of the P25TX class.</summary>
|
|
P25TX();
|
|
|
|
/// <summary>Process local buffer and transmit on the air interface.</summary>
|
|
void process();
|
|
|
|
/// <summary>Write data to the local buffer.</summary>
|
|
uint8_t writeData(const uint8_t* data, uint8_t length);
|
|
|
|
/// <summary>Clears the local buffer.</summary>
|
|
void clear();
|
|
|
|
/// <summary>Sets the FDMA preamble count.</summary>
|
|
void setPreambleCount(uint8_t preambleCnt);
|
|
/// <summary>Sets the fine adjust 4FSK symbol levels.</summary>
|
|
void setSymbolLvlAdj(int8_t level3Adj, int8_t level1Adj);
|
|
/// <summary>Helper to set the calibration state for Tx.</summary>
|
|
void setCal(bool start);
|
|
|
|
/// <summary>Helper to get how much space the ring buffer has for samples.</summary>
|
|
uint8_t getSpace() const;
|
|
|
|
private:
|
|
SerialBuffer m_fifo;
|
|
|
|
P25TXSTATE m_state;
|
|
|
|
uint8_t m_poBuffer[1200U];
|
|
uint16_t m_poLen;
|
|
uint16_t m_poPtr;
|
|
|
|
uint16_t m_preambleCnt;
|
|
uint16_t m_tailCnt;
|
|
|
|
/// <summary></summary>
|
|
void createData();
|
|
/// <summary></summary>
|
|
void createCal();
|
|
|
|
/// <summary></summary>
|
|
void writeByte(uint8_t c);
|
|
/// <summary></summary>
|
|
void writeSilence();
|
|
};
|
|
} // namespace p25
|
|
|
|
#endif // __P25_TX_H__
|