Added the class switch_FPGA, which controls the switch in the FPGA that connects the analog frontend and the DMA to the queues of the HW accelerators.

Removed some unused variables in the tracking.

src/algorithms/signal_source/adapters/ad9361_fpga_signal_source.cc

@@ -108,6 +108,12 @@ Ad9361FpgaSignalSource::Ad9361FpgaSignalSource(ConfigurationInterface* configura
                                scale_dds_dbfs_);
     }
 
+    // turn switch to A/D position
+    std::string default_device_name = "/dev/uio13";
+    std::string device_name = configuration->property(role + ".devicename", default_device_name);
+    int switch_position = configuration->property(role + ".switch_position", 0);
+    switch_fpga = std::make_shared <fpga_switch>(device_name);
+    switch_fpga->set_switch_position(switch_position);
 }
 
 

src/algorithms/signal_source/adapters/ad9361_fpga_signal_source.h

@@ -33,6 +33,7 @@
 #define GNSS_SDR_AD9361_FPGA_SIGNAL_SOURCE_H_
 
 #include "gnss_block_interface.h"
+#include "fpga_switch.h"
 
 #include <boost/shared_ptr.hpp>
 #include <gnuradio/msg_queue.h>
@@ -112,6 +113,8 @@ private:
     std::string dump_filename_;
 
     boost::shared_ptr<gr::msg_queue> queue_;
+
+    std::shared_ptr<fpga_switch> switch_fpga;
 };
 
 #endif /*GNSS_SDR_AD9361_FPGA_SIGNAL_SOURCE_H_*/

src/algorithms/signal_source/libs/CMakeLists.txt

@@ -58,6 +58,10 @@ set (SIGNAL_SOURCE_LIB_SOURCES
   rtl_tcp_dongle_info.cc
   ${OPT_SIGNAL_SOURCE_LIB_SOURCES})
 
+if(ENABLE_FPGA)
+    SET(SIGNAL_SOURCE_LIB_SOURCES ${SIGNAL_SOURCE_LIB_SOURCES} fpga_switch.cc)
+endif(ENABLE_FPGA)
+
 include_directories(
      ${CMAKE_CURRENT_SOURCE_DIR}
      ${Boost_INCLUDE_DIRS}

src/algorithms/signal_source/libs/fpga_switch.cc

@@ -0,0 +1,136 @@
+/*!
+ * \file fpga_switch.cc
+ * \brief Switch that connects the HW accelerator queues to the analog front end or the DMA.
+ * \authors <ul>
+ *    <li> Marc Majoral, 2017. mmajoral(at)cttc.cat
+ *    <li> Javier Arribas, 2015. jarribas(at)cttc.es
+ * </ul>
+ *
+ * Class that controls a switch in the FPGA
+ *
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GNSS-SDR is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#include "fpga_switch.h"
+
+#include <cmath>
+
+// FPGA stuff
+#include <new>
+
+// libraries used by DMA test code and GIPO test code
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+// libraries used by DMA test code
+#include <sys/stat.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <assert.h>
+
+// libraries used by GPIO test code
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/mman.h>
+
+// logging
+#include <glog/logging.h>
+
+// string manipulation
+#include <string>
+
+// constants
+#define PAGE_SIZE 0x10000
+#define TEST_REGISTER_TRACK_WRITEVAL 0x55AA
+
+fpga_switch::fpga_switch(std::string device_name)
+{
+    if ((d_device_descriptor = open(device_name.c_str(), O_RDWR | O_SYNC)) == -1)
+        {
+            LOG(WARNING) << "Cannot open deviceio" << device_name;
+            printf("switch memory successfully mapped\n");
+        }
+    d_map_base = reinterpret_cast<volatile unsigned *>(mmap(NULL, PAGE_SIZE,
+            PROT_READ | PROT_WRITE, MAP_SHARED, d_device_descriptor, 0));
+
+    if (d_map_base == reinterpret_cast<void*>(-1))
+        {
+            LOG(WARNING) << "Cannot map the FPGA switch module into tracking memory";
+            printf("could not map switch memory\n");
+        }
+
+    // sanity check : check test register
+    unsigned writeval = TEST_REGISTER_TRACK_WRITEVAL;
+    unsigned readval;
+    readval = fpga_switch::fpga_switch_test_register(writeval);
+    if (writeval != readval)
+        {
+            LOG(WARNING) << "Test register sanity check failed";
+        }
+    else
+        {
+            LOG(INFO) << "Test register sanity check success !";
+        }
+
+    DLOG(INFO) << "Switch FPGA class created";
+}
+
+fpga_switch::~fpga_switch()
+{
+    close_device();
+}
+
+void fpga_switch::set_switch_position(int switch_position)
+{
+    d_map_base[0] = switch_position;
+}
+
+unsigned fpga_switch::fpga_switch_test_register(
+        unsigned writeval)
+{
+    unsigned readval;
+    // write value to test register
+    d_map_base[3] = writeval;
+    // read value from test register
+    readval = d_map_base[3];
+    // return read value
+    return readval;
+}
+
+void fpga_switch::close_device()
+{
+    unsigned * aux = const_cast<unsigned*>(d_map_base);
+    if (munmap(static_cast<void*>(aux), PAGE_SIZE) == -1)
+        {
+            printf("Failed to unmap memory uio\n");
+        }
+
+    close(d_device_descriptor);
+}
+    
+

src/algorithms/signal_source/libs/fpga_switch.h

@@ -0,0 +1,61 @@
+/*!
+ * \file fpga_switch.h
+ * \brief Switch that connects the HW accelerator queues to the analog front end or the DMA.
+ * \authors <ul>
+ * 			<li> Marc Majoral, 2017. mmajoral(at)cttc.cat
+ *          <li> Javier Arribas, 2016. jarribas(at)cttc.es
+ *          </ul>
+ *
+ * Class that controls a switch in the FPGA
+ *
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GNSS-SDR is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#ifndef GNSS_SDR_FPGA_SWITCH_H_
+#define GNSS_SDR_FPGA_SWITCH_H_
+
+#include <gnuradio/block.h>
+
+#define MAX_LENGTH_DEVICEIO_NAME 50
+
+class fpga_switch
+{
+public:
+    fpga_switch(std::string device_name);
+    ~fpga_switch();
+    void set_switch_position(int switch_position);
+	
+private:
+    int d_device_descriptor; // driver descriptor
+    volatile unsigned *d_map_base; // driver memory map
+
+    // private functions
+    unsigned fpga_switch_test_register(unsigned writeval);
+	void close_device(void);
+	
+};
+
+#endif /* GNSS_SDR_FPGA_SWITCH_H_ */

src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_fpga_sc.cc

@@ -173,11 +173,6 @@ Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc(
     d_carrier_phase_step_rad = 0.0;
 
     set_relative_rate(1.0 / static_cast<double>(d_vector_length));
-    
-    d_first_time = 1;
-    
-    
-    
 }
 
 void Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::start_tracking()
@@ -246,16 +241,14 @@ void Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::start_tracking()
     d_code_phase_samples = d_acq_code_phase_samples;
     std::string sys_ = &d_acquisition_gnss_synchro->System;
     sys = sys_.substr(0,1);
-    //std::cout << "Tracking of GPS L1 C/A signal started on channel " << d_channel << " for satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << std::endl;
+    std::cout << "Tracking of GPS L1 C/A signal started on channel " << d_channel << " for satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << std::endl;
     LOG(INFO) << "Starting tracking of satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << " on channel " << d_channel;
     // enable tracking
     d_pull_in = true;
-    multicorrelator_fpga_8sc->lock_channel();
     d_enable_tracking = true; //do it in the end to avoid starting running tracking before finishing this function
     LOG(INFO) << "PULL-IN Doppler [Hz]=" << d_carrier_doppler_hz
             << " Code Phase correction [samples]=" << delay_correction_samples
             << " PULL-IN Code Phase [samples]=" << d_acq_code_phase_samples;
-    d_first_time = 1;
 }
 
 Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::~Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc()
@@ -275,10 +268,7 @@ Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::~Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc()
     {
             volk_gnsssdr_free(d_local_code_shift_chips);
             volk_gnsssdr_free(d_correlator_outs);
-            //volk_gnsssdr_free(d_ca_code);
             delete[] d_Prompt_buffer;
-            //multicorrelator_cpu.free();
-            //volk_gnsssdr_free(d_ca_code_16sc);
             multicorrelator_fpga_8sc->free();
     }
     catch(const std::exception & ex)
@@ -297,8 +287,6 @@ int Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::general_work (int noutput_items __attrib
 	int counter_corr_0_out;
 	int sample_counter;
 	
-    // samples offset
-//    int samples_offset;
     unsigned absolute_samples_offset;
 //    int kk2;	
     // process vars
@@ -308,7 +296,6 @@ int Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::general_work (int noutput_items __attrib
     double code_error_filt_chips = 0.0;
 
 	int next_prn_length_samples = d_current_prn_length_samples;
-//	int offset_prn_samples = 0;
 
     // Block input data and block output stream pointers
     Gnss_Synchro **out = reinterpret_cast<Gnss_Synchro **>(&output_items[0]);
@@ -324,6 +311,7 @@ int Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::general_work (int noutput_items __attrib
             if (d_pull_in == true)
                 {
                     d_pull_in = false;
+                    multicorrelator_fpga_8sc->lock_channel();
 					unsigned counter_value = multicorrelator_fpga_8sc->read_sample_counter();
 					unsigned num_frames = ceil((counter_value - current_synchro_data.Acq_samplestamp_samples - current_synchro_data.Acq_delay_samples)/d_correlation_length_samples);
 					absolute_samples_offset = current_synchro_data.Acq_delay_samples + current_synchro_data.Acq_samplestamp_samples + num_frames*d_correlation_length_samples;
@@ -382,7 +370,6 @@ int Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::general_work (int noutput_items __attrib
             double T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
             double K_blk_samples = T_prn_samples + d_rem_code_phase_samples + code_error_filt_secs * static_cast<double>(d_fs_in);
 			next_prn_length_samples = round(K_blk_samples);
-//			offset_prn_samples = next_prn_length_samples - d_current_prn_length_samples;
 
             //################### PLL COMMANDS #################################################
             // carrier phase step (NCO phase increment per sample) [rads/sample]
@@ -426,15 +413,12 @@ int Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::general_work (int noutput_items __attrib
                     if (d_carrier_lock_fail_counter > MAXIMUM_LOCK_FAIL_COUNTER)
                         {
                             std::cout << "Loss of lock in channel " << d_channel << "!" << std::endl;
-                            d_debug_loss_of_track = 1;
                             LOG(INFO) << "Loss of lock in channel " << d_channel << "!";
                             this->message_port_pub(pmt::mp("events"), pmt::from_long(3)); // 3 -> loss of lock  
                             d_carrier_lock_fail_counter = 0;
                             d_enable_tracking = false; // TODO: check if disabling tracking is consistent with the channel state machine
                             multicorrelator_fpga_8sc->unlock_channel();  
-                             
-
-                        } 
+                        }
                 } 
 
             // ########### Output the tracking data to navigation and PVT ##########
@@ -535,14 +519,13 @@ int Gps_L1_Ca_Dll_Pll_Tracking_fpga_sc::general_work (int noutput_items __attrib
     
     if (d_enable_tracking == true)
         {
-            return 1; //output tracking result ALWAYS even in the case of d_enable_tracking==false
-            //return 0; // debug 
+            return 1; 
         }
     else
         {
             return 0;
         }
-            
+
 }
 
 

src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_fpga_sc.h

@@ -181,7 +181,6 @@ private:
     
     double d_K_blk_samples_previous;
     int d_offset_sample_previous;
-    int d_first_time;
     
     int d_kk = 0;
     int d_numsamples_debug = 990;
@@ -194,7 +193,6 @@ private:
     int d_counter_corr_0_in = 0;
     int d_counter_corr_0_out = 0;
     int d_sample_counter_inc = 0;
-    int d_debug_loss_of_track = 0;
 };
 
 #endif //GNSS_SDR_GPS_L1_CA_DLL_PLL_TRACKING_FPGA_SC_H

src/algorithms/tracking/libs/CMakeLists.txt

@@ -47,7 +47,6 @@ set(TRACKING_LIB_SOURCES
 
 if(ENABLE_FPGA)
     SET(TRACKING_LIB_SOURCES ${TRACKING_LIB_SOURCES} fpga_multicorrelator_8sc.cc)
-    SET(TRACKING_LIB_SOURCES ${TRACKING_LIB_SOURCES} fpga_multicorrelator_real_codes_8sc.cc)
 endif(ENABLE_FPGA)
 
 include_directories(

src/algorithms/tracking/libs/fpga_multicorrelator_8sc.cc

@@ -95,23 +95,18 @@ void fpga_multicorrelator_8sc::set_initial_sample(int samples_offset)
     d_map_base[13] = d_initial_sample_counter;
 }
        
-//bool fpga_multicorrelator_8sc::set_local_code_and_taps(int code_length_chips,
-//        const int* local_code_in, float *shifts_chips, int PRN)     
-bool fpga_multicorrelator_8sc::set_local_code_and_taps(int code_length_chips,
+void fpga_multicorrelator_8sc::set_local_code_and_taps(int code_length_chips,
         float *shifts_chips, int PRN)             
 {
-    //d_local_code_in = local_code_in;
+
     d_shifts_chips = shifts_chips;
     d_code_length_chips = code_length_chips;
     fpga_multicorrelator_8sc::fpga_configure_tracking_gps_local_code(PRN);
-    return true;
 }
 
-bool fpga_multicorrelator_8sc::set_output_vectors(gr_complex* corr_out)
+void fpga_multicorrelator_8sc::set_output_vectors(gr_complex* corr_out)
 {
-    // Save CPU pointers
     d_corr_out = corr_out;
-    return true;
 }
 
 void fpga_multicorrelator_8sc::update_local_code(float rem_code_phase_chips)
@@ -122,24 +117,20 @@ void fpga_multicorrelator_8sc::update_local_code(float rem_code_phase_chips)
 }
 
 
-bool fpga_multicorrelator_8sc::Carrier_wipeoff_multicorrelator_resampler(
+void fpga_multicorrelator_8sc::Carrier_wipeoff_multicorrelator_resampler(
         float rem_carrier_phase_in_rad, float phase_step_rad,
         float rem_code_phase_chips, float code_phase_step_chips,
         int signal_length_samples)
 {
+
+
     update_local_code(rem_code_phase_chips);
     d_rem_carrier_phase_in_rad = rem_carrier_phase_in_rad;
     d_code_phase_step_chips = code_phase_step_chips;
     d_phase_step_rad = phase_step_rad;
     d_correlator_length_samples = signal_length_samples;
-    
-//    if (first_time == 1)
-//    {
-		fpga_multicorrelator_8sc::fpga_compute_signal_parameters_in_fpga();
-		fpga_multicorrelator_8sc::fpga_configure_signal_parameters_in_fpga();
-//		first_time = 0;
-//    }
-    
+	fpga_multicorrelator_8sc::fpga_compute_signal_parameters_in_fpga();
+	fpga_multicorrelator_8sc::fpga_configure_signal_parameters_in_fpga();
     fpga_multicorrelator_8sc::fpga_launch_multicorrelator_fpga();
     int irq_count;
     ssize_t nb;
@@ -150,7 +141,6 @@ bool fpga_multicorrelator_8sc::Carrier_wipeoff_multicorrelator_resampler(
             printf("Tracking_module Interrupt number %d\n", irq_count);
         }
     fpga_multicorrelator_8sc::read_tracking_gps_results();
-    return true;
 }
 
 fpga_multicorrelator_8sc::fpga_multicorrelator_8sc(int n_correlators,
@@ -186,7 +176,6 @@ fpga_multicorrelator_8sc::fpga_multicorrelator_8sc(int n_correlators,
     d_ca_codes = static_cast<int*>(volk_gnsssdr_malloc(static_cast<int>(GPS_L1_CA_CODE_LENGTH_CHIPS*NUM_PRNs) * sizeof(int), volk_gnsssdr_get_alignment()));
     for (unsigned int PRN = 1; PRN <= NUM_PRNs; PRN++)
     {
-		//gps_l1_ca_code_gen_int(&d_ca_codes[GPS_L1_CA_CODE_LENGTH_CHIPS*(PRN -1)], PRN, 0);
 		gps_l1_ca_code_gen_int(&d_ca_codes[(int(GPS_L1_CA_CODE_LENGTH_CHIPS)) * (PRN - 1)], PRN, 0);
     }
     DLOG(INFO) << "TRACKING FPGA CLASS CREATED";

src/algorithms/tracking/libs/fpga_multicorrelator_8sc.h

@@ -51,15 +51,19 @@ public:
     fpga_multicorrelator_8sc(int n_correlators, std::string device_name,
             unsigned int device_base);
     ~fpga_multicorrelator_8sc();
-	bool set_output_vectors(gr_complex* corr_out);
+	//bool set_output_vectors(gr_complex* corr_out);
+	void set_output_vectors(gr_complex* corr_out);
 //    bool set_local_code_and_taps(
 //            int code_length_chips, const int* local_code_in,
 //            float *shifts_chips, int PRN);
-    bool set_local_code_and_taps(
+    //bool set_local_code_and_taps(
+    void set_local_code_and_taps(
             int code_length_chips, 
             float *shifts_chips, int PRN);            
-    bool set_output_vectors(lv_16sc_t* corr_out);
-    void update_local_code(float rem_code_phase_chips);bool Carrier_wipeoff_multicorrelator_resampler(
+    //bool set_output_vectors(lv_16sc_t* corr_out);
+    void update_local_code(float rem_code_phase_chips);
+    //bool Carrier_wipeoff_multicorrelator_resampler(
+    void Carrier_wipeoff_multicorrelator_resampler(
             float rem_carrier_phase_in_rad, float phase_step_rad,
             float rem_code_phase_chips, float code_phase_step_chips,
             int signal_length_samples);bool free();

src/algorithms/tracking/libs/fpga_multicorrelator_real_codes_8sc.cc

@@ -1,148 +0,0 @@
-/*!
- * \file fpga_multicorrelator_real_codes_8sc.cc
- * \brief High optimized CPU vector multiTAP correlator class with real-valued local codes
- * \authors <ul>
- *          <li> Javier Arribas, 2015. jarribas(at)cttc.es
- *          <li> Cillian O'Driscoll, 2017. cillian.odriscoll(at)gmail.com
- *          </ul>
- *
- * Class that implements a high optimized vector multiTAP correlator class for CPUs
- *
- * -------------------------------------------------------------------------
- *
- * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
- *
- * GNSS-SDR is a software defined Global Navigation
- *          Satellite Systems receiver
- *
- * This file is part of GNSS-SDR.
- *
- * GNSS-SDR is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * GNSS-SDR is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
- *
- * -------------------------------------------------------------------------
- */
-
-//#include "cpu_multicorrelator_real_codes.h"
-#include "fpga_multicorrelator_real_codes_8sc.h"
-#include <cmath>
-#include <iostream>
-#include <volk_gnsssdr/volk_gnsssdr.h>
-
-
-fpga_multicorrelator_real_codes_8sc::fpga_multicorrelator_real_codes_8sc()
-{
-    d_sig_in = nullptr;
-    d_local_code_in = nullptr;
-    d_shifts_chips = nullptr;
-    d_corr_out = nullptr;
-    d_local_codes_resampled = nullptr;
-    d_code_length_chips = 0;
-    d_n_correlators = 0;
-}
-
-
-fpga_multicorrelator_real_codes_8sc::~fpga_multicorrelator_real_codes_8sc()
-{
-    if(d_local_codes_resampled != nullptr)
-        {
-            fpga_multicorrelator_real_codes_8sc::free();
-        }
-}
-
-
-bool fpga_multicorrelator_real_codes_8sc::init(
-        int max_signal_length_samples,
-        int n_correlators)
-{
-    // ALLOCATE MEMORY FOR INTERNAL vectors
-    size_t size = max_signal_length_samples * sizeof(float);
-
-    d_local_codes_resampled = static_cast<float**>(volk_gnsssdr_malloc(n_correlators * sizeof(float*), volk_gnsssdr_get_alignment()));
-    for (int n = 0; n < n_correlators; n++)
-        {
-            d_local_codes_resampled[n] = static_cast<float*>(volk_gnsssdr_malloc(size, volk_gnsssdr_get_alignment()));
-        }
-    d_n_correlators = n_correlators;
-    return true;
-}
-
-
-
-bool fpga_multicorrelator_real_codes_8sc::set_local_code_and_taps(
-        int code_length_chips,
-        const float* local_code_in,
-        float *shifts_chips)
-{
-    d_local_code_in = local_code_in;
-    d_shifts_chips = shifts_chips;
-    d_code_length_chips = code_length_chips;
-    return true;
-}
-
-
-bool fpga_multicorrelator_real_codes_8sc::set_input_output_vectors(std::complex<float>* corr_out, const std::complex<float>* sig_in)
-{
-    // Save CPU pointers
-    d_sig_in = sig_in;
-    d_corr_out = corr_out;
-    return true;
-}
-
-
-void fpga_multicorrelator_real_codes_8sc::update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips)
-{
-    volk_gnsssdr_32f_xn_resampler_32f_xn(d_local_codes_resampled,
-            d_local_code_in,
-            rem_code_phase_chips,
-            code_phase_step_chips,
-            d_shifts_chips,
-            d_code_length_chips,
-            d_n_correlators,
-            correlator_length_samples);
-}
-
-
-bool fpga_multicorrelator_real_codes_8sc::Carrier_wipeoff_multicorrelator_resampler(
-        float rem_carrier_phase_in_rad,
-        float phase_step_rad,
-        float rem_code_phase_chips,
-        float code_phase_step_chips,
-        int signal_length_samples)
-{
-    update_local_code(signal_length_samples, rem_code_phase_chips, code_phase_step_chips);
-    // Regenerate phase at each call in order to avoid numerical issues
-    lv_32fc_t phase_offset_as_complex[1];
-    phase_offset_as_complex[0] = lv_cmake(std::cos(rem_carrier_phase_in_rad), -std::sin(rem_carrier_phase_in_rad));
-    // call VOLK_GNSSSDR kernel
-    volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn(d_corr_out, d_sig_in, std::exp(lv_32fc_t(0, - phase_step_rad)), phase_offset_as_complex, (const float**)d_local_codes_resampled, d_n_correlators, signal_length_samples);
-    return true;
-}
-
-
-bool fpga_multicorrelator_real_codes_8sc::free()
-{
-    // Free memory
-    if (d_local_codes_resampled != nullptr)
-        {
-            for (int n = 0; n < d_n_correlators; n++)
-                {
-                    volk_gnsssdr_free(d_local_codes_resampled[n]);
-                }
-            volk_gnsssdr_free(d_local_codes_resampled);
-            d_local_codes_resampled = nullptr;
-        }
-    return true;
-}
-
-

src/algorithms/tracking/libs/fpga_multicorrelator_real_codes_8sc.h

@@ -1,73 +0,0 @@
-/*!
- * \file fpga_multicorrelator_real_codes_8sc.h
- * \brief High optimized CPU vector multiTAP correlator class using real-valued local codes
- * \authors <ul>
- *          <li> Javier Arribas, 2015. jarribas(at)cttc.es
- *          <li> Cillian O'Driscoll, 2017, cillian.odriscoll(at)gmail.com
- *          </ul>
- *
- * Class that implements a high optimized vector multiTAP correlator class for CPUs
- *
- * -------------------------------------------------------------------------
- *
- * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
- *
- * GNSS-SDR is a software defined Global Navigation
- *          Satellite Systems receiver
- *
- * This file is part of GNSS-SDR.
- *
- * GNSS-SDR is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * GNSS-SDR is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
- *
- * -------------------------------------------------------------------------
- */
-
-//#ifndef GNSS_SDR_CPU_MULTICORRELATOR_REAL_CODES_H_
-//#define GNSS_SDR_CPU_MULTICORRELATOR_REAL_CODES_H_
-
-#ifndef GNSS_SDR_FPGA_MULTICORRELATOR_REAL_CODES_8SC_H_
-#define GNSS_SDR_FPGA_MULTICORRELATOR_REAL_CODES_8SC_H_
-
-
-#include <complex>
-
-/*!
- * \brief Class that implements carrier wipe-off and correlators.
- */
-class fpga_multicorrelator_real_codes_8sc
-{
-public:
-    fpga_multicorrelator_real_codes_8sc();
-    ~fpga_multicorrelator_real_codes_8sc();
-    bool init(int max_signal_length_samples, int n_correlators);
-    bool set_local_code_and_taps(int code_length_chips, const float* local_code_in, float *shifts_chips);
-    bool set_input_output_vectors(std::complex<float>* corr_out, const std::complex<float>* sig_in);
-    void update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips);
-    bool Carrier_wipeoff_multicorrelator_resampler(float rem_carrier_phase_in_rad, float phase_step_rad, float rem_code_phase_chips, float code_phase_step_chips, int signal_length_samples);
-    bool free();
-
-private:
-    // Allocate the device input vectors
-    const std::complex<float> *d_sig_in;
-    float **d_local_codes_resampled;
-    const float *d_local_code_in;
-    std::complex<float> *d_corr_out;
-    float *d_shifts_chips;
-    int d_code_length_chips;
-    int d_n_correlators;
-};
-
-
-#endif /* GNSS_SDR_FPGA_MULTICORRELATOR_REAL_CODES_8SC_H_ */
-