GNSS-SDR  0.0.14
An Open Source GNSS Software Defined Receiver
ad9361_fpga_signal_source.h
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1 /*!
2  * \file ad9361_fpga_signal_source.h
3  * \brief signal source for Analog Devices front-end AD9361 connected directly to FPGA accelerators.
4  * This source implements only the AD9361 control. It is NOT compatible with conventional SDR acquisition and tracking blocks.
5  * Please use the fmcomms2 source if conventional SDR acquisition and tracking is selected in the configuration file.
6  *
7  * -----------------------------------------------------------------------------
8  *
9  * GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
10  * This file is part of GNSS-SDR.
11  *
12  * Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
13  * SPDX-License-Identifier: GPL-3.0-or-later
14  *
15  * -----------------------------------------------------------------------------
16  */
17 
18 #ifndef GNSS_SDR_AD9361_FPGA_SIGNAL_SOURCE_H
19 #define GNSS_SDR_AD9361_FPGA_SIGNAL_SOURCE_H
20 
21 #include "concurrent_queue.h"
22 #include "fpga_dynamic_bit_selection.h"
23 #include "fpga_switch.h"
24 #include "gnss_block_interface.h"
25 #include <pmt/pmt.h>
26 #include <cstdint>
27 #include <memory>
28 #include <mutex>
29 #include <string>
30 #include <thread>
31 
32 
33 /** \addtogroup Signal_Source
34  * \{ */
35 /** \addtogroup Signal_Source_adapters
36  * \{ */
37 
38 
39 class ConfigurationInterface;
40 
41 class Ad9361FpgaSignalSource : public GNSSBlockInterface
42 {
43 public:
44  Ad9361FpgaSignalSource(const ConfigurationInterface *configuration,
45  const std::string &role, unsigned int in_stream,
46  unsigned int out_stream, Concurrent_Queue<pmt::pmt_t> *queue);
47 
48  ~Ad9361FpgaSignalSource();
49 
50  void start() override;
51 
52  inline std::string role() override
53  {
54  return role_;
55  }
56 
57  /*!
58  * \brief Returns "Ad9361_Fpga_Signal_Source"
59  */
60  inline std::string implementation() override
61  {
62  return "Ad9361_Fpga_Signal_Source";
63  }
64 
65  inline size_t item_size() override
66  {
67  return item_size_;
68  }
69 
70  void connect(gr::top_block_sptr top_block) override;
71  void disconnect(gr::top_block_sptr top_block) override;
72  gr::basic_block_sptr get_left_block() override;
73  gr::basic_block_sptr get_right_block() override;
74 
75 private:
76  const std::string switch_device_name = "AXIS_Switch_v1_0_0"; // Switch UIO device name
77  const std::string dyn_bit_sel_device_name = "dynamic_bits_selector"; // Switch UIO device name
78 
79  // perform dynamic bit selection every 500 ms by default
80  static const uint32_t Gain_control_period_ms = 500;
81 
82  void run_DMA_process(const std::string &FreqBand,
83  const std::string &Filename1,
84  const std::string &Filename2);
85 
86  void run_dynamic_bit_selection_process();
87 
88  std::thread thread_file_to_dma;
89  std::thread thread_dynamic_bit_selection;
90 
91  std::shared_ptr<Fpga_Switch> switch_fpga;
92  std::shared_ptr<Fpga_dynamic_bit_selection> dynamic_bit_selection_fpga;
93 
94  std::string role_;
95 
96  // Front-end settings
97  std::string gain_mode_rx1_;
98  std::string gain_mode_rx2_;
99  std::string rf_port_select_;
100  std::string filter_file_;
101  std::string filter_source_;
102  std::string filter_filename_;
103  std::string filename_rx1;
104  std::string filename_rx2;
105  std::string freq_band;
106 
107  std::mutex dma_mutex;
108  std::mutex dynamic_bit_selection_mutex;
109 
110  double rf_gain_rx1_;
111  double rf_gain_rx2_;
112  uint64_t freq_; // frequency of local oscillator
113  uint64_t sample_rate_;
114  uint64_t bandwidth_;
115  float Fpass_;
116  float Fstop_;
117 
118  // DDS configuration for LO generation for external mixer
119  double scale_dds_dbfs_;
120  double phase_dds_deg_;
121  double tx_attenuation_db_;
122  uint64_t freq_rf_tx_hz_;
123  uint64_t freq_dds_tx_hz_;
124  uint64_t tx_bandwidth_;
125  size_t item_size_;
126  uint32_t in_stream_;
127  uint32_t out_stream_;
128  int32_t switch_position;
129  bool enable_dds_lo_;
130 
131  bool filter_auto_;
132  bool quadrature_;
133  bool rf_dc_;
134  bool bb_dc_;
135  bool rx1_enable_;
136  bool rx2_enable_;
137  bool enable_DMA_;
138  bool enable_dynamic_bit_selection_;
139  bool rf_shutdown_;
140 };
141 
142 
143 /** \} */
144 /** \} */
145 #endif // GNSS_SDR_AD9361_FPGA_SIGNAL_SOURCE_H
concurrent_queue.h
Interface of a thread-safe std::queue.
Ad9361FpgaSignalSource::start
void start() override
Start the flow of samples if needed.
gnss_block_interface.h
This interface represents a GNSS block.
ConfigurationInterface
This abstract class represents an interface to configuration parameters.
Definition: configuration_interface.h:44
fpga_switch.h
Switch that connects the HW accelerator queues to the analog front end or the DMA.
GNSSBlockInterface
This abstract class represents an interface to GNSS blocks.
Definition: gnss_block_interface.h:68
Concurrent_Queue< pmt::pmt_t >
fpga_dynamic_bit_selection.h
Dynamic bit selection in the received signal.
Ad9361FpgaSignalSource::implementation
std::string implementation() override
Returns "Ad9361_Fpga_Signal_Source".
Definition: ad9361_fpga_signal_source.h:60
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