mirror of https://github.com/gnss-sdr/gnss-sdr
143 lines
4.1 KiB
C++
143 lines
4.1 KiB
C++
/*!
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* \file galileo_e5a_dll_pll_tracking_fpga.h
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* \brief Adapts a code DLL + carrier PLL
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* tracking block to a TrackingInterface for Galileo E5a signals for the FPGA
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* \author Marc Majoral, 2019. mmajoral(at)cttc.cat
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR 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 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR 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 GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_GALILEO_E5A_DLL_PLL_TRACKING_FPGA_H_
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#define GNSS_SDR_GALILEO_E5A_DLL_PLL_TRACKING_FPGA_H_
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#include "dll_pll_veml_tracking_fpga.h"
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#include "tracking_interface.h"
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#include <string>
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class ConfigurationInterface;
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/*!
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* \brief This class implements a code DLL + carrier PLL tracking loop
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*/
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class GalileoE5aDllPllTrackingFpga : public TrackingInterface
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{
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public:
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/*!
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* \brief Constructor
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*/
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GalileoE5aDllPllTrackingFpga(ConfigurationInterface* configuration,
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const std::string& role,
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unsigned int in_streams,
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unsigned int out_streams);
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/*!
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* \brief Destructor
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*/
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virtual ~GalileoE5aDllPllTrackingFpga();
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/*!
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* \brief Role
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*/
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inline std::string role() override
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{
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return role_;
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}
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/*!
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* \brief Returns "Galileo_E5a_DLL_PLL_Tracking_Fpga"
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*/
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inline std::string implementation() override
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{
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return "Galileo_E5a_DLL_PLL_Tracking_Fpga";
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}
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/*!
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* \brief Returns size of lv_16sc_t
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*/
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size_t item_size() override
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{
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return sizeof(int16_t);
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}
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/*!
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* \brief Connect
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*/
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void connect(gr::top_block_sptr top_block) override;
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/*!
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* \brief Disconnect
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*/
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void disconnect(gr::top_block_sptr top_block) override;
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/*!
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* \brief Get left block
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*/
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gr::basic_block_sptr get_left_block() override;
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/*!
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* \brief Get right block
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*/
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gr::basic_block_sptr get_right_block() override;
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/*!
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* \brief Set tracking channel unique ID
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*/
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void set_channel(unsigned int channel) override;
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/*!
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* \brief Set acquisition/tracking common Gnss_Synchro object pointer
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* to efficiently exchange synchronization data between acquisition and tracking blocks
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*/
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void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro) override;
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/*!
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* \brief Start the tracking process in the FPGA
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*/
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void start_tracking() override;
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/*!
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* \brief Stop the tracking process in the FPGA
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*/
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void stop_tracking() override;
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private:
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// the following flags are FPGA-specific and they are using arrange the values of the local code in the way the FPGA
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// expects. This arrangement is done in the initialisation to avoid consuming unnecessary clock cycles during tracking.
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static const int32_t LOCAL_CODE_FPGA_ENABLE_WRITE_MEMORY = 0x0C000000; // flag that enables WE (Write Enable) of the local code FPGA
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static const int32_t LOCAL_CODE_FPGA_CORRELATOR_SELECT_COUNT = 0x20000000; // flag that selects the writing of the pilot code in the FPGA (as opposed to the data code)
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dll_pll_veml_tracking_fpga_sptr tracking_fpga_sc;
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uint32_t channel_;
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std::string role_;
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uint32_t in_streams_;
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uint32_t out_streams_;
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int32_t* d_ca_codes;
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int32_t* d_data_codes;
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bool d_track_pilot;
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};
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#endif // GNSS_SDR_GALILEO_E5A_DLL_PLL_TRACKING_FPGA_H_
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