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141 lines
4.9 KiB
141 lines
4.9 KiB
/*
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* Copyright (C) 2011-2015 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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#ifndef DVMegaController_H
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#define DVMegaController_H
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#include "SerialDataController.h"
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#include "RingBuffer.h"
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#include "Modem.h"
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#include "Utils.h"
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#include "StdCompat.h"
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#include <string>
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enum RESP_TYPE_MEGA {
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RTM_TIMEOUT,
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RTM_ERROR,
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RTM_UNKNOWN,
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RTM_GET_STATUS,
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RTM_GET_VERSION,
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RTM_GET_SERIAL,
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RTM_GET_CONFIG,
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RTM_SET_CONFIG,
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RTM_RXPREAMBLE,
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RTM_START,
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RTM_HEADER,
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RTM_RXSYNC,
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RTM_DATA,
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RTM_EOT,
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RTM_RXLOST,
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RTM_SET_TESTMDE
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};
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/*
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* CDVMegaController - Driver for DV-Mega boards (modem and radio variants).
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*
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* Hardware interface: USB CDC-ACM serial at 115200 baud.
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*
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* Two hardware variants, selected by constructor:
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* 1. Modem variant (port, path, rxInvert, txInvert, txDelay)
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* The board is a bare GMSK modem; the host radio provides the RF.
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* rxInvert/txInvert flip the baseband polarity to match the radio's
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* discriminator/modulator wiring.
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* 2. Radio variant (port, path, txDelay, rxFrequency, txFrequency, power)
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* The board includes a UHF/VHF transceiver. Frequency and power are
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* programmed at startup via a second SET_CONFIG (RF layer) command.
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* rxFrequency != 0 is the distinguishing condition checked in openModem().
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*
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* Protocol: DVRPTR binary framing (shared with DV-RPTR V1).
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* Frame structure: [0xD0] [len_lo] [len_hi] [type] [txCount] [pktCount]
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* [payload...] [checksum_lo] [checksum_hi]
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* The type byte has bit 7 set in responses from the board (stripped with & 0x7F).
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* Checksum is either CCITT-16 (when m_checksum is true, reported in GET_STATUS)
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* or a fixed sentinel 0x000B when the firmware does not support checksums.
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*
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* Reconnection (findModem()):
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* On any serial error the port is closed. An in-progress RX stream is
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* terminated with a synthetic DSMTT_EOT. The driver then polls every 2s
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* (4 x 500ms sleep) searching for the device by USB sysfs path before
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* reopening and re-initialising.
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*
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* Sysfs path tracking (findPort / findPath):
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* m_path is the stable USB device path (e.g. /sys/devices/platform/.../1-1.2).
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* This survives port renumbering across reconnects. findPort() walks
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* /sys/class/tty/ttyACM* to find which /dev node currently maps to that path.
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*/
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class CDVMegaController : public CModem {
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public:
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// Modem-only variant: no integrated RF, host radio provides the signal.
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CDVMegaController(const std::string& port, const std::string& path, bool rxInvert, bool txInvert, unsigned int txDelay);
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// Radio variant: integrated transceiver; frequency in Hz, power in percent.
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CDVMegaController(const std::string& port, const std::string& path, unsigned int txDelay, unsigned int rxFrequency, unsigned int txFrequency, unsigned int power);
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virtual ~CDVMegaController();
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virtual bool start();
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virtual unsigned int getSpace();
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virtual bool isTXReady();
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virtual bool writeHeader(const CHeaderData& header);
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virtual bool writeData(const unsigned char* data, unsigned int length, bool end);
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virtual std::string getPath() const;
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private:
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void entry();
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std::string m_port;
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std::string m_path;
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bool m_rxInvert;
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bool m_txInvert;
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unsigned int m_txDelay;
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unsigned int m_rxFrequency;
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unsigned int m_txFrequency;
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unsigned int m_power;
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CSerialDataController m_serial;
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unsigned char* m_buffer;
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CRingBuffer<unsigned char> m_txData;
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unsigned char m_txCounter;
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unsigned char m_pktCounter;
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bool m_rx;
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unsigned int m_txSpace;
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bool m_txEnabled;
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bool m_checksum;
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bool readVersion();
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bool readStatus();
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bool setConfig();
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bool setFrequencyAndPower();
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bool setEnabled(bool enable);
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RESP_TYPE_MEGA getResponse(unsigned char* buffer, unsigned int& length);
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bool findPort();
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bool findPath();
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// Closes the port, signals EOT if mid-stream, then polls every 2s until
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// findPort() + openModem() succeed or m_stopped is set.
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bool findModem();
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// Opens the serial port, sends GET_VERSION, SET_CONFIG (physical layer),
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// optionally SET_CONFIG (RF layer for radio variant), then setEnabled(true).
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bool openModem();
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};
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#endif
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