mirror of https://github.com/gnss-sdr/gnss-sdr
132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
/*!
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* \file fpga_multicorrelator_8sc.h
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* \brief High optimized FPGA vector correlator class for lv_16sc_t (short int complex)
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* \authors <ul>
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* <li> Marc Majoral, 2017. mmajoral(at)cttc.cat
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* <li> Javier Arribas, 2016. jarribas(at)cttc.es
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* </ul>
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*
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* Class that controls and executes a high optimized vector correlator
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* class in the FPGA
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2018 (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_FPGA_MULTICORRELATOR_8SC_H_
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#define GNSS_SDR_FPGA_MULTICORRELATOR_8SC_H_
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#include <gnuradio/block.h>
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#include <volk_gnsssdr/volk_gnsssdr.h>
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#define MAX_LENGTH_DEVICEIO_NAME 50
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/*!
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* \brief Class that implements carrier wipe-off and correlators.
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*/
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class fpga_multicorrelator_8sc
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{
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public:
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fpga_multicorrelator_8sc(int n_correlators, std::string device_name,
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unsigned int device_base, int *ca_codes, unsigned int code_length);
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~fpga_multicorrelator_8sc();
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//bool set_output_vectors(gr_complex* corr_out);
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void set_output_vectors(gr_complex *corr_out);
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// bool set_local_code_and_taps(
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// int code_length_chips, const int* local_code_in,
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// float *shifts_chips, int PRN);
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//bool set_local_code_and_taps(
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void set_local_code_and_taps(
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int code_length_chips,
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float *shifts_chips, int PRN);
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//bool set_output_vectors(lv_16sc_t* corr_out);
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void update_local_code(float rem_code_phase_chips);
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//bool Carrier_wipeoff_multicorrelator_resampler(
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void Carrier_wipeoff_multicorrelator_resampler(
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float rem_carrier_phase_in_rad, float phase_step_rad,
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float rem_code_phase_chips, float code_phase_step_chips,
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int signal_length_samples);
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bool free();
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void set_channel(unsigned int channel);
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void set_initial_sample(int samples_offset);
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int read_sample_counter();
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void lock_channel(void);
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void unlock_channel(void);
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void read_sample_counters(int *sample_counter, int *secondary_sample_counter, int *counter_corr_0_in, int *counter_corr_0_out); // debug
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private:
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//const int *d_local_code_in;
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gr_complex *d_corr_out;
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float *d_shifts_chips;
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int d_code_length_chips;
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int d_n_correlators;
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// data related to the hardware module and the driver
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int d_device_descriptor; // driver descriptor
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volatile unsigned *d_map_base; // driver memory map
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// configuration data received from the interface
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unsigned int d_channel; // channel number
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unsigned d_correlator_length_samples;
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float d_rem_code_phase_chips;
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float d_code_phase_step_chips;
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float d_rem_carrier_phase_in_rad;
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float d_phase_step_rad;
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// configuration data computed in the format that the FPGA expects
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unsigned *d_initial_index;
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unsigned *d_initial_interp_counter;
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unsigned d_code_phase_step_chips_num;
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int d_rem_carr_phase_rad_int;
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int d_phase_step_rad_int;
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unsigned d_initial_sample_counter;
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// driver
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std::string d_device_name;
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unsigned int d_device_base;
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int *d_ca_codes;
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unsigned int d_code_length; // nominal number of chips
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// private functions
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unsigned fpga_acquisition_test_register(unsigned writeval);
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void fpga_configure_tracking_gps_local_code(int PRN);
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void fpga_compute_code_shift_parameters(void);
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void fpga_configure_code_parameters_in_fpga(void);
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void fpga_compute_signal_parameters_in_fpga(void);
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void fpga_configure_signal_parameters_in_fpga(void);
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void fpga_launch_multicorrelator_fpga(void);
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void read_tracking_gps_results(void);
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void reset_multicorrelator(void);
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void close_device(void);
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// debug
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//unsigned int first_time = 1;
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};
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#endif /* GNSS_SDR_FPGA_MULTICORRELATOR_H_ */
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