mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2024-06-30 00:43:15 +00:00
7308745f05
Re-license CMake scripts with BSD-3-Clause
180 lines
5.1 KiB
C++
180 lines
5.1 KiB
C++
/*!
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* \file gps_l2_m_pcps_acquisition_fpga.h
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* \brief Adapts an FPGA-offloaded PCPS acquisition block
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* to an AcquisitionInterface for GPS L2 M signals
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* \authors <ul>
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* <li> Javier Arribas, 2019. jarribas(at)cttc.es
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* </ul>
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*
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* -----------------------------------------------------------------------------
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is part of GNSS-SDR.
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_GPS_L2_M_PCPS_ACQUISITION_FPGA_H
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#define GNSS_SDR_GPS_L2_M_PCPS_ACQUISITION_FPGA_H
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#include "channel_fsm.h"
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#include "pcps_acquisition_fpga.h"
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#include <gnuradio/runtime_types.h> // for basic_block_sptr, top_block_sptr
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#include <cstddef> // for size_t
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#include <memory> // for weak_ptr
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#include <string> // for string
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#include <vector>
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/** \addtogroup Acquisition
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* \{ */
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/** \addtogroup Acq_adapters
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* \{ */
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class Gnss_Synchro;
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class ConfigurationInterface;
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/*!
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* \brief This class adapts a PCPS acquisition block off-loaded on an FPGA
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* to an AcquisitionInterface for GPS L2 M signals
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*/
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class GpsL2MPcpsAcquisitionFpga : public AcquisitionInterface
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{
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public:
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GpsL2MPcpsAcquisitionFpga(
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const 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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~GpsL2MPcpsAcquisitionFpga() = default;
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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 "GPS_L2_M_PCPS_Acquisition_Fpga"
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*/
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inline std::string implementation() override
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{
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return "GPS_L2_M_PCPS_Acquisition_Fpga";
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}
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inline size_t item_size() override
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{
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return sizeof(float);
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}
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void connect(gr::top_block_sptr top_block) override;
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void disconnect(gr::top_block_sptr top_block) override;
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gr::basic_block_sptr get_left_block() override;
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gr::basic_block_sptr get_right_block() 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
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* 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 Set acquisition channel unique ID
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*/
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inline void set_channel(unsigned int channel) override
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{
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channel_ = channel;
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acquisition_fpga_->set_channel(channel_);
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}
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/*!
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* \brief Set channel fsm associated to this acquisition instance
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*/
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inline void set_channel_fsm(std::weak_ptr<ChannelFsm> channel_fsm) override
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{
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channel_fsm_ = channel_fsm;
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acquisition_fpga_->set_channel_fsm(channel_fsm);
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}
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/*!
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* \brief Set statistics threshold of PCPS algorithm
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*/
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void set_threshold(float threshold) override;
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/*!
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* \brief Set maximum Doppler off grid search
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*/
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void set_doppler_max(unsigned int doppler_max) override;
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/*!
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* \brief Set Doppler steps for the grid search
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*/
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void set_doppler_step(unsigned int doppler_step) override;
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/*!
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* \brief Initializes acquisition algorithm.
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*/
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void init() override;
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/*!
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* \brief Sets local code for GPS L2/M PCPS acquisition algorithm.
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*/
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void set_local_code() override;
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/*!
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* \brief Returns the maximum peak of grid search
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*/
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signed int mag() override;
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/*!
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* \brief Restart acquisition algorithm
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*/
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void reset() override;
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/*!
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* \brief If state = 1, it forces the block to start acquiring from the first sample
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*/
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void set_state(int state) override;
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/*!
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* \brief Stop running acquisition
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*/
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void stop_acquisition() override;
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void set_resampler_latency(uint32_t latency_samples __attribute__((unused))) override{};
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private:
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const std::string acquisition_device_name = "acquisition_S00_AXI"; // UIO device name
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static const uint32_t NUM_PRNs = 32;
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static const uint32_t QUANT_BITS_LOCAL_CODE = 16;
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static const uint32_t SELECT_LSBits = 0x0000FFFF; // Select the 10 LSbits out of a 20-bit word
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static const uint32_t SELECT_MSBbits = 0xFFFF0000; // Select the 10 MSbits out of a 20-bit word
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static const uint32_t SELECT_ALL_CODE_BITS = 0xFFFFFFFF; // Select a 20 bit word
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static const uint32_t SHL_CODE_BITS = 65536; // shift left by 10 bits
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pcps_acquisition_fpga_sptr acquisition_fpga_;
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std::vector<uint32_t> d_all_fft_codes_; // memory that contains all the code ffts
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std::weak_ptr<ChannelFsm> channel_fsm_;
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Gnss_Synchro* gnss_synchro_;
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std::string item_type_;
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std::string dump_filename_;
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std::string role_;
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int64_t fs_in_;
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float threshold_;
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unsigned int channel_;
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unsigned int doppler_max_;
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unsigned int doppler_step_;
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unsigned int in_streams_;
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unsigned int out_streams_;
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};
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/** \} */
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/** \} */
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#endif // GNSS_SDR_GPS_L2_M_PCPS_ACQUISITION_FPGA_H
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