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optimized the process of computing and writing the fft of the local code to the acquisition HW accelerator.

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The writing of the local code is still performed by processor instructions in a loop.
THe FPGA L2 classes were updated accordingly.
This commit is contained in:
Marc Majoral 2019-03-26 12:26:08 +01:00
parent 905a85670c
commit 2b46c79ba7
13 changed files with 124 additions and 47 deletions
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24
src/algorithms/acquisition/adapters/galileo_e1_pcps_ambiguous_acquisition_fpga.cc
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@ -46,6 +46,10 @@
#define QUANT_BITS_LOCAL_CODE 16
#define SELECT_LSBits 0x0000FFFF // Select the 10 LSbits out of a 20-bit word
#define SELECT_MSBbits 0xFFFF0000 // Select the 10 MSbits out of a 20-bit word
#define SELECT_ALL_CODE_BITS 0xFFFFFFFF // Select a 20 bit word
#define SHL_CODE_BITS 65536 // shift left by 10 bits
GalileoE1PcpsAmbiguousAcquisitionFpga::GalileoE1PcpsAmbiguousAcquisitionFpga(
ConfigurationInterface* configuration,
@ -106,8 +110,10 @@ GalileoE1PcpsAmbiguousAcquisitionFpga::GalileoE1PcpsAmbiguousAcquisitionFpga(
auto* fft_if = new gr::fft::fft_complex(nsamples_total, true); // Direct FFT
auto* code = new std::complex<float>[nsamples_total]; // buffer for the local code
auto* fft_codes_padded = static_cast<gr_complex*>(volk_gnsssdr_malloc(nsamples_total * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_all_fft_codes_ = new lv_16sc_t[nsamples_total * GALILEO_E1_NUMBER_OF_CODES]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
//d_all_fft_codes_ = new lv_16sc_t[nsamples_total * GALILEO_E1_NUMBER_OF_CODES]; // memory containing all the possible fft codes for PRN 0 to 32
d_all_fft_codes_ = new uint32_t[(nsamples_total * GALILEO_E1_NUMBER_OF_CODES)]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
int32_t tmp, tmp2, local_code, fft_data;
for (uint32_t PRN = 1; PRN <= GALILEO_E1_NUMBER_OF_CODES; PRN++)
{
@ -155,10 +161,18 @@ GalileoE1PcpsAmbiguousAcquisitionFpga::GalileoE1PcpsAmbiguousAcquisitionFpga(
max = std::abs(fft_codes_padded[i].imag());
}
}
for (uint32_t i = 0; i < nsamples_total; i++) // map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// and package codes in a format that is ready to be written to the FPGA
for (uint32_t i = 0; i < nsamples_total; i++)
{
d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
tmp = static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
tmp2 = static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
local_code = (tmp & SELECT_LSBits) | ((tmp2 * SHL_CODE_BITS) & SELECT_MSBbits); // put together the real part and the imaginary part
fft_data = local_code & SELECT_ALL_CODE_BITS;
d_all_fft_codes_[i + (nsamples_total * (PRN - 1))] = fft_data;
// d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
// static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
}
}

3
src/algorithms/acquisition/adapters/galileo_e1_pcps_ambiguous_acquisition_fpga.h
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@ -165,7 +165,8 @@ private:
unsigned int in_streams_;
unsigned int out_streams_;
lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
//lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
uint32_t* d_all_fft_codes_; // memory that contains all the code ffts
};
#endif /* GNSS_SDR_GALILEO_E1_PCPS_AMBIGUOUS_ACQUISITION_FPGA_H_ */

26
src/algorithms/acquisition/adapters/galileo_e5a_pcps_acquisition_fpga.cc
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@ -45,6 +45,10 @@
#include <cstring> // for strcpy, memcpy
#define QUANT_BITS_LOCAL_CODE 16
#define SELECT_LSBits 0x0000FFFF // Select the 10 LSbits out of a 20-bit word
#define SELECT_MSBbits 0xFFFF0000 // Select the 10 MSbits out of a 20-bit word
#define SELECT_ALL_CODE_BITS 0xFFFFFFFF // Select a 20 bit word
#define SHL_CODE_BITS 65536 // shift left by 10 bits
GalileoE5aPcpsAcquisitionFpga::GalileoE5aPcpsAcquisitionFpga(ConfigurationInterface* configuration,
const std::string& role,
@ -106,8 +110,11 @@ GalileoE5aPcpsAcquisitionFpga::GalileoE5aPcpsAcquisitionFpga(ConfigurationInterf
auto* fft_if = new gr::fft::fft_complex(nsamples_total, true); // Direct FFT
auto* code = new std::complex<float>[nsamples_total]; // buffer for the local code
auto* fft_codes_padded = static_cast<gr_complex*>(volk_gnsssdr_malloc(nsamples_total * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_all_fft_codes_ = new lv_16sc_t[nsamples_total * GALILEO_E5A_NUMBER_OF_CODES]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
//d_all_fft_codes_ = new lv_16sc_t[nsamples_total * GALILEO_E5A_NUMBER_OF_CODES]; // memory containing all the possible fft codes for PRN 0 to 32
d_all_fft_codes_ = new uint32_t[(nsamples_total * GALILEO_E5A_NUMBER_OF_CODES)]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
int32_t tmp, tmp2, local_code, fft_data;
for (uint32_t PRN = 1; PRN <= GALILEO_E5A_NUMBER_OF_CODES; PRN++)
{
@ -155,13 +162,18 @@ GalileoE5aPcpsAcquisitionFpga::GalileoE5aPcpsAcquisitionFpga(ConfigurationInterf
max = std::abs(fft_codes_padded[i].imag());
}
}
for (uint32_t i = 0; i < nsamples_total; i++) // map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// and package codes in a format that is ready to be written to the FPGA
for (uint32_t i = 0; i < nsamples_total; i++)
{
d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
tmp = static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
tmp2 = static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
local_code = (tmp & SELECT_LSBits) | ((tmp2 * SHL_CODE_BITS) & SELECT_MSBbits); // put together the real part and the imaginary part
fft_data = local_code & SELECT_ALL_CODE_BITS;
d_all_fft_codes_[i + (nsamples_total * (PRN - 1))] = fft_data;
// d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(256 * floor(fft_codes_padded[i].real() * (pow(2, 7 - 1) - 1) / max)),
// static_cast<int32_t>(256 * floor(fft_codes_padded[i].imag() * (pow(2, 7 - 1) - 1) / max)));
// d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
// static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
}
}

3
src/algorithms/acquisition/adapters/galileo_e5a_pcps_acquisition_fpga.h
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@ -182,7 +182,8 @@ private:
Gnss_Synchro* gnss_synchro_;
lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
//lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
uint32_t* d_all_fft_codes_; // memory that contains all the code ffts
};
#endif /* GNSS_SDR_GALILEO_E5A_PCPS_ACQUISITION_FPGA_H_ */

27
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition_fpga.cc
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@ -47,10 +47,12 @@
#include <complex> // for complex
#include <cstring> // for memcpy
#define NUM_PRNs 32
#define QUANT_BITS_LOCAL_CODE 16
#define SELECT_LSBits 0x0000FFFF // Select the 10 LSbits out of a 20-bit word
#define SELECT_MSBbits 0xFFFF0000 // Select the 10 MSbits out of a 20-bit word
#define SELECT_ALL_CODE_BITS 0xFFFFFFFF // Select a 20 bit word
#define SHL_CODE_BITS 65536 // shift left by 10 bits
GpsL1CaPcpsAcquisitionFpga::GpsL1CaPcpsAcquisitionFpga(
ConfigurationInterface* configuration,
@ -102,8 +104,11 @@ GpsL1CaPcpsAcquisitionFpga::GpsL1CaPcpsAcquisitionFpga(
// allocate memory to compute all the PRNs and compute all the possible codes
auto* code = new std::complex<float>[nsamples_total]; // buffer for the local code
auto* fft_codes_padded = static_cast<gr_complex*>(volk_gnsssdr_malloc(nsamples_total * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_all_fft_codes_ = new lv_16sc_t[nsamples_total * NUM_PRNs]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
//d_all_fft_codes_ = new lv_16sc_t[nsamples_total * NUM_PRNs]; // memory containing all the possible fft codes for PRN 0 to 32
d_all_fft_codes_ = new uint32_t[(nsamples_total * NUM_PRNs)]; // memory containing all the possible fft codes for PRN 0 to 32
float max;
int32_t tmp, tmp2, local_code, fft_data;
// temporary maxima search
for (uint32_t PRN = 1; PRN <= NUM_PRNs; PRN++)
{
gps_l1_ca_code_gen_complex_sampled(code, PRN, fs_in, 0); // generate PRN code
@ -135,10 +140,18 @@ GpsL1CaPcpsAcquisitionFpga::GpsL1CaPcpsAcquisitionFpga(
max = std::abs(fft_codes_padded[i].imag());
}
}
for (uint32_t i = 0; i < nsamples_total; i++) // map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// and package codes in a format that is ready to be written to the FPGA
for (uint32_t i = 0; i < nsamples_total; i++)
{
d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
tmp = static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
tmp2 = static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
local_code = (tmp & SELECT_LSBits) | ((tmp2 * SHL_CODE_BITS) & SELECT_MSBbits); // put together the real part and the imaginary part
fft_data = local_code & SELECT_ALL_CODE_BITS;
d_all_fft_codes_[i + (nsamples_total * (PRN - 1))] = fft_data;
// d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
// static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
}
}

4
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition_fpga.h
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@ -35,6 +35,7 @@
#ifndef GNSS_SDR_GPS_L1_CA_PCPS_ACQUISITION_FPGA_H_
#define GNSS_SDR_GPS_L1_CA_PCPS_ACQUISITION_FPGA_H_
#include "channel_fsm.h"
#include "pcps_acquisition_fpga.h"
#include <gnuradio/runtime_types.h> // for basic_block_sptr, top_block_sptr
@ -165,7 +166,8 @@ private:
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
//lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
uint32_t* d_all_fft_codes_; // memory that contains all the code ffts
};
#endif /* GNSS_SDR_GPS_L1_CA_PCPS_ACQUISITION_FPGA_H_ */

27
src/algorithms/acquisition/adapters/gps_l2_m_pcps_acquisition_fpga.cc
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@ -47,7 +47,11 @@
#include <cstring> // for memcpy
#define NUM_PRNs 32
#define QUANT_BITS_LOCAL_CODE 16
#define SELECT_LSBits 0x0000FFFF // Select the 10 LSbits out of a 20-bit word
#define SELECT_MSBbits 0xFFFF0000 // Select the 10 MSbits out of a 20-bit word
#define SELECT_ALL_CODE_BITS 0xFFFFFFFF // Select a 20 bit word
#define SHL_CODE_BITS 65536 // shift left by 10 bits
GpsL2MPcpsAcquisitionFpga::GpsL2MPcpsAcquisitionFpga(
ConfigurationInterface* configuration,
@ -102,8 +106,11 @@ GpsL2MPcpsAcquisitionFpga::GpsL2MPcpsAcquisitionFpga(
// allocate memory to compute all the PRNs and compute all the possible codes
auto* code = new std::complex<float>[nsamples_total]; // buffer for the local code
auto* fft_codes_padded = static_cast<gr_complex*>(volk_gnsssdr_malloc(nsamples_total * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_all_fft_codes_ = new lv_16sc_t[nsamples_total * NUM_PRNs]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
//d_all_fft_codes_ = new lv_16sc_t[nsamples_total * NUM_PRNs]; // memory containing all the possible fft codes for PRN 0 to 32
d_all_fft_codes_ = new uint32_t[(nsamples_total * NUM_PRNs)]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
int32_t tmp, tmp2, local_code, fft_data;
for (unsigned int PRN = 1; PRN <= NUM_PRNs; PRN++)
{
gps_l2c_m_code_gen_complex_sampled(code, PRN, fs_in_);
@ -127,10 +134,18 @@ GpsL2MPcpsAcquisitionFpga::GpsL2MPcpsAcquisitionFpga(
max = std::abs(fft_codes_padded[i].imag());
}
}
for (unsigned int i = 0; i < nsamples_total; i++) // map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// and package codes in a format that is ready to be written to the FPGA
for (uint32_t i = 0; i < nsamples_total; i++)
{
d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int>(floor(fft_codes_padded[i].real() * (pow(2, 7) - 1) / max)),
static_cast<int>(floor(fft_codes_padded[i].imag() * (pow(2, 7) - 1) / max)));
tmp = static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
tmp2 = static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
local_code = (tmp & SELECT_LSBits) | ((tmp2 * SHL_CODE_BITS) & SELECT_MSBbits); // put together the real part and the imaginary part
fft_data = local_code & SELECT_ALL_CODE_BITS;
d_all_fft_codes_[i + (nsamples_total * (PRN - 1))] = fft_data;
// d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
// static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
}
}

3
src/algorithms/acquisition/adapters/gps_l2_m_pcps_acquisition_fpga.h
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@ -169,7 +169,8 @@ private:
unsigned int in_streams_;
unsigned int out_streams_;
lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
//lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
uint32_t* d_all_fft_codes_; // memory that contains all the code ffts
//float calculate_threshold(float pfa);
};

24
src/algorithms/acquisition/adapters/gps_l5i_pcps_acquisition_fpga.cc
View File

@ -49,6 +49,10 @@
#define NUM_PRNs 32
#define QUANT_BITS_LOCAL_CODE 16
#define SELECT_LSBits 0x0000FFFF // Select the 10 LSbits out of a 20-bit word
#define SELECT_MSBbits 0xFFFF0000 // Select the 10 MSbits out of a 20-bit word
#define SELECT_ALL_CODE_BITS 0xFFFFFFFF // Select a 20 bit word
#define SHL_CODE_BITS 65536 // shift left by 10 bits
GpsL5iPcpsAcquisitionFpga::GpsL5iPcpsAcquisitionFpga(
@ -104,9 +108,12 @@ GpsL5iPcpsAcquisitionFpga::GpsL5iPcpsAcquisitionFpga(
auto* fft_if = new gr::fft::fft_complex(nsamples_total, true); // Direct FFT
auto* code = new gr_complex[nsamples_total];
auto* fft_codes_padded = static_cast<gr_complex*>(volk_gnsssdr_malloc(nsamples_total * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_all_fft_codes_ = new lv_16sc_t[nsamples_total * NUM_PRNs]; // memory containing all the possible fft codes for PRN 0 to 32
//d_all_fft_codes_ = new lv_16sc_t[nsamples_total * NUM_PRNs]; // memory containing all the possible fft codes for PRN 0 to 32
d_all_fft_codes_ = new uint32_t[(nsamples_total * NUM_PRNs)]; // memory containing all the possible fft codes for PRN 0 to 32
float max; // temporary maxima search
int32_t tmp, tmp2, local_code, fft_data;
for (uint32_t PRN = 1; PRN <= NUM_PRNs; PRN++)
{
gps_l5i_code_gen_complex_sampled(code, PRN, fs_in);
@ -137,13 +144,18 @@ GpsL5iPcpsAcquisitionFpga::GpsL5iPcpsAcquisitionFpga(
max = std::abs(fft_codes_padded[i].imag());
}
}
for (uint32_t i = 0; i < nsamples_total; i++) // map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// map the FFT to the dynamic range of the fixed point values an copy to buffer containing all FFTs
// and package codes in a format that is ready to be written to the FPGA
for (uint32_t i = 0; i < nsamples_total; i++)
{
d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
tmp = static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
tmp2 = static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max));
local_code = (tmp & SELECT_LSBits) | ((tmp2 * SHL_CODE_BITS) & SELECT_MSBbits); // put together the real part and the imaginary part
fft_data = local_code & SELECT_ALL_CODE_BITS;
d_all_fft_codes_[i + (nsamples_total * (PRN - 1))] = fft_data;
// d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(128 * floor(fft_codes_padded[i].real() * (pow(2, 7 - 1) - 1) / max)),
// static_cast<int32_t>(128 * floor(fft_codes_padded[i].imag() * (pow(2, 7 - 1) - 1) / max)));
// d_all_fft_codes_[i + nsamples_total * (PRN - 1)] = lv_16sc_t(static_cast<int32_t>(floor(fft_codes_padded[i].real() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)),
// static_cast<int32_t>(floor(fft_codes_padded[i].imag() * (pow(2, QUANT_BITS_LOCAL_CODE - 1) - 1) / max)));
}
}

3
src/algorithms/acquisition/adapters/gps_l5i_pcps_acquisition_fpga.h
View File

@ -167,7 +167,8 @@ private:
unsigned int in_streams_;
unsigned int out_streams_;
lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
//lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
uint32_t* d_all_fft_codes_; // memory that contains all the code ffts
float calculate_threshold(float pfa);
};

3
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_fpga.h
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@ -62,7 +62,8 @@ typedef struct
int32_t code_length;
uint32_t select_queue_Fpga;
std::string device_name;
lv_16sc_t* all_fft_codes; // memory that contains all the code ffts
//lv_16sc_t* all_fft_codes; // memory that contains all the code ffts
uint32_t* all_fft_codes;
//float downsampling_factor;
uint32_t downsampling_factor;
uint32_t total_block_exp;

16
src/algorithms/acquisition/libs/fpga_acquisition.cc
View File

@ -86,7 +86,8 @@ Fpga_Acquisition::Fpga_Acquisition(std::string device_name,
int64_t fs_in,
uint32_t sampled_ms __attribute__((unused)),
uint32_t select_queue,
lv_16sc_t *all_fft_codes,
//lv_16sc_t *all_fft_codes,
uint32_t *all_fft_codes,
uint32_t excludelimit)
{
uint32_t vector_length = nsamples_total;
@ -139,12 +140,13 @@ void Fpga_Acquisition::write_local_code()
// write local code
for (k = 0; k < d_vector_length; k++)
{
tmp = d_all_fft_codes[d_nsamples_total * (d_PRN - 1) + k].real();
tmp2 = d_all_fft_codes[d_nsamples_total * (d_PRN - 1) + k].imag();
local_code = (tmp & SELECT_LSBits) | ((tmp2 * SHL_CODE_BITS) & SELECT_MSBbits); // put together the real part and the imaginary part
fft_data = local_code & SELECT_ALL_CODE_BITS;
d_map_base[6] = fft_data;
// tmp = d_all_fft_codes[d_nsamples_total * (d_PRN - 1) + k].real();
// tmp2 = d_all_fft_codes[d_nsamples_total * (d_PRN - 1) + k].imag();
//
// local_code = (tmp & SELECT_LSBits) | ((tmp2 * SHL_CODE_BITS) & SELECT_MSBbits); // put together the real part and the imaginary part
// fft_data = local_code & SELECT_ALL_CODE_BITS;
// d_map_base[6] = fft_data;
d_map_base[6] = d_all_fft_codes[d_nsamples_total * (d_PRN - 1) + k];
}
}

8
src/algorithms/acquisition/libs/fpga_acquisition.h
View File

@ -53,7 +53,8 @@ public:
int64_t fs_in,
uint32_t sampled_ms,
uint32_t select_queue,
lv_16sc_t *all_fft_codes,
//lv_16sc_t *all_fft_codes,
uint32_t *all_fft_codes,
uint32_t excludelimit);
~Fpga_Acquisition();
@ -110,8 +111,9 @@ private:
// data related to the hardware module and the driver
int32_t d_fd; // driver descriptor
volatile uint32_t *d_map_base; // driver memory map
lv_16sc_t *d_all_fft_codes; // memory that contains all the code ffts
uint32_t d_vector_length; // number of samples incluing padding and number of ms
//lv_16sc_t *d_all_fft_codes; // memory that contains all the code ffts
uint32_t *d_all_fft_codes; // memory that contains all the code ffts
uint32_t d_vector_length; // number of samples incluing padding and number of ms
uint32_t d_excludelimit;
uint32_t d_nsamples_total; // number of samples including padding
uint32_t d_nsamples; // number of samples not including padding