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Optimize the use of the FPGA dynamic bit selection blocks. Reorder AD9361 FPGA signal source private members by size. use ssize_t write() return value.

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This commit is contained in:
Marc Majoral
2023-09-13 17:19:10 +02:00
parent 3d1b5b2214
commit 5c0826b11e
5 changed files with 99 additions and 145 deletions
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143
src/algorithms/signal_source/libs/fpga_dynamic_bit_selection.cc
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@@ -2,7 +2,7 @@
* \file fpga_dynamic_bit_selection.cc
* \brief Dynamic Bit Selection in the received signal.
* \authors <ul>
* <li> Marc Majoral, 2020. mmajoral(at)cttc.es
* <li> Marc Majoral, 2023. mmajoral(at)cttc.es
* </ul>
*
* Class that controls the Dynamic Bit Selection in the FPGA.
@@ -13,58 +13,52 @@
* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
* This file is part of GNSS-SDR.
*
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2023 (see AUTHORS file for a list of contributors)
* SPDX-License-Identifier: GPL-3.0-or-later
*
* -----------------------------------------------------------------------------
*/
#include "fpga_dynamic_bit_selection.h"
#include "uio_fpga.h"
#include <glog/logging.h>
#include <fcntl.h> // for open, O_RDWR, O_SYNC
#include <iostream> // for cout
#include <sys/mman.h> // for mmap
Fpga_dynamic_bit_selection::Fpga_dynamic_bit_selection(const std::string &device_name1, const std::string &device_name2)
Fpga_dynamic_bit_selection::Fpga_dynamic_bit_selection(uint32_t num_freq_bands)
: d_num_freq_bands(num_freq_bands)
{
// dynamic bits selection corresponding to frequency band 1
if ((d_device_descriptor1 = open(device_name1.c_str(), O_RDWR | O_SYNC)) == -1)
d_map_base = std::vector<volatile unsigned *>(d_num_freq_bands);
d_device_descriptors = std::vector<int>(d_num_freq_bands);
d_shift_out_bits = std::vector<uint32_t>(d_num_freq_bands);
for (uint32_t k = 0; k < d_num_freq_bands; k++)
{
LOG(WARNING) << "Cannot open deviceio" << device_name1;
// find the uio device file corresponding to the dynamic bit selector 0 module.
std::string device_name;
if (find_uio_dev_file_name(device_name, dyn_bit_sel_device_name, 0) < 0)
{
std::cerr << "Cannot find the FPGA uio device file corresponding to device name " << dyn_bit_sel_device_name << '\n';
return;
}
// dynamic bits selection corresponding to frequency band 1
if ((d_device_descriptors[k] = open(device_name.c_str(), O_RDWR | O_SYNC)) == -1)
{
LOG(WARNING) << "Cannot open deviceio" << device_name;
}
d_map_base[k] = reinterpret_cast<volatile unsigned *>(mmap(nullptr, FPGA_PAGE_SIZE,
PROT_READ | PROT_WRITE, MAP_SHARED, d_device_descriptors[k], 0));
if (d_map_base[k] == reinterpret_cast<void *>(-1))
{
LOG(WARNING) << "Cannot map the FPGA dynamic bit selection module in frequency band 1 into tracking memory";
std::cout << "Could not map dynamic bit selection memory corresponding to frequency band 1.\n";
}
// init bit selection corresopnding to frequency band 1
d_shift_out_bits[k] = shift_out_bits_default;
d_map_base[k][0] = d_shift_out_bits[k];
}
d_map_base1 = reinterpret_cast<volatile unsigned *>(mmap(nullptr, FPGA_PAGE_SIZE,
PROT_READ | PROT_WRITE, MAP_SHARED, d_device_descriptor1, 0));
if (d_map_base1 == reinterpret_cast<void *>(-1))
{
LOG(WARNING) << "Cannot map the FPGA dynamic bit selection module in frequency band 1 into tracking memory";
std::cout << "Could not map dynamic bit selection memory corresponding to frequency band 1.\n";
}
// dynamic bits selection corresponding to frequency band 2
if ((d_device_descriptor2 = open(device_name2.c_str(), O_RDWR | O_SYNC)) == -1)
{
LOG(WARNING) << "Cannot open deviceio" << device_name2;
}
d_map_base2 = reinterpret_cast<volatile unsigned *>(mmap(nullptr, FPGA_PAGE_SIZE,
PROT_READ | PROT_WRITE, MAP_SHARED, d_device_descriptor2, 0));
if (d_map_base2 == reinterpret_cast<void *>(-1))
{
LOG(WARNING) << "Cannot map the FPGA dynamic bit selection module in frequency band 2 into tracking memory";
std::cout << "Could not map dynamic bit selection memory corresponding to frequency band 2.\n";
}
// initialize default bit selection
shift_out_bits_band1 = shift_out_bits_default;
shift_out_bits_band2 = shift_out_bits_default;
// init bit selection corresopnding to frequency band 1
d_map_base1[0] = shift_out_bits_band1;
// init bit selection corresponding to frequency band 2
d_map_base2[0] = shift_out_bits_band2;
DLOG(INFO) << "Dynamic bit selection FPGA class created";
}
@@ -77,65 +71,42 @@ Fpga_dynamic_bit_selection::~Fpga_dynamic_bit_selection()
void Fpga_dynamic_bit_selection::bit_selection()
{
// estimated signal power corresponding to frequency band 1
uint32_t rx_signal_power1 = d_map_base1[1];
// estimated signal power corresponding to frequency band 2
uint32_t rx_signal_power2 = d_map_base2[1];
// dynamic bit selection corresponding to frequency band 1
if (rx_signal_power1 > Power_Threshold_High)
for (uint32_t k = 0; k < d_num_freq_bands; k++)
{
if (shift_out_bits_band1 < shift_out_bit_max)
{
shift_out_bits_band1 = shift_out_bits_band1 + 1;
}
}
else if (rx_signal_power1 < Power_Threshold_Low)
{
if (shift_out_bits_band1 > shift_out_bits_min)
{
shift_out_bits_band1 = shift_out_bits_band1 - 1;
}
}
// estimated signal power
uint32_t rx_signal_power = d_map_base[k][1];
// dynamic bit selection corresponding to frequency band 2
if (rx_signal_power2 > Power_Threshold_High)
{
if (shift_out_bits_band2 < shift_out_bit_max)
// dynamic bit selection
if (rx_signal_power > Power_Threshold_High)
{
shift_out_bits_band2 = shift_out_bits_band2 + 1;
if (d_shift_out_bits[k] < shift_out_bit_max)
{
d_shift_out_bits[k] = d_shift_out_bits[k] + 1;
}
}
}
else if (rx_signal_power2 < Power_Threshold_Low)
{
if (shift_out_bits_band2 > shift_out_bits_min)
else if (rx_signal_power < Power_Threshold_Low)
{
shift_out_bits_band2 = shift_out_bits_band2 - 1;
if (d_shift_out_bits[k] > shift_out_bits_min)
{
d_shift_out_bits[k] = d_shift_out_bits[k] - 1;
}
}
// update bit selection corresopnding to frequency band 1
d_map_base[k][0] = d_shift_out_bits[k];
}
// update bit selection corresopnding to frequency band 1
d_map_base1[0] = shift_out_bits_band1;
// udpate bit selection corresponding to frequency band 2
d_map_base2[0] = shift_out_bits_band2;
}
void Fpga_dynamic_bit_selection::close_devices()
{
auto *aux = const_cast<unsigned *>(d_map_base1);
if (munmap(static_cast<void *>(aux), FPGA_PAGE_SIZE) == -1)
for (uint32_t k = 0; k < d_num_freq_bands; k++)
{
std::cout << "Failed to unmap memory uio\n";
auto *aux = const_cast<unsigned *>(d_map_base[k]);
if (munmap(static_cast<void *>(aux), FPGA_PAGE_SIZE) == -1)
{
std::cout << "Failed to unmap memory uio\n";
}
close(d_device_descriptors[k]);
}
aux = const_cast<unsigned *>(d_map_base2);
if (munmap(static_cast<void *>(aux), FPGA_PAGE_SIZE) == -1)
{
std::cout << "Failed to unmap memory uio\n";
}
close(d_device_descriptor1);
close(d_device_descriptor2);
}

18
src/algorithms/signal_source/libs/fpga_dynamic_bit_selection.h
View File

@@ -25,6 +25,7 @@
#include <cstddef>
#include <cstdint>
#include <string>
#include <vector>
/** \addtogroup Signal_Source
* \{ */
@@ -42,7 +43,7 @@ public:
/*!
* \brief Constructor
*/
explicit Fpga_dynamic_bit_selection(const std::string& device_name1, const std::string& device_name2);
explicit Fpga_dynamic_bit_selection(uint32_t num_freq_bands);
/*!
* \brief Destructor
@@ -52,12 +53,12 @@ public:
/*!
* \brief This function configures the switch in th eFPGA
*/
// void set_switch_position(int32_t switch_position);
void bit_selection(void);
private:
const std::string switch_device_name = std::string("AXIS_Switch_v1_0_0"); // Switch UIO device name
const std::string dyn_bit_sel_device_name = std::string("dynamic_bits_selector"); // Switch dhnamic bit selector device name
static const size_t FPGA_PAGE_SIZE = 0x1000;
static const uint32_t Num_bits_ADC = 12; // Number of bits in the ADC
static const uint32_t Num_bits_FPGA = 4; // Number of bits after the bit selection
static const uint32_t shift_out_bits_default = Num_bits_ADC - Num_bits_FPGA; // take the most significant bits by default
@@ -70,14 +71,11 @@ private:
void close_devices(void);
uint32_t shift_out_bits_band1; // number of bits to shift for frequency band 1
uint32_t shift_out_bits_band2; // number of bits to shift for frequency band 2
std::vector<volatile unsigned*> d_map_base;
std::vector<int> d_device_descriptors;
std::vector<uint32_t> d_shift_out_bits;
volatile unsigned* d_map_base1; // driver memory map corresponding to frequency band 1
int d_device_descriptor1; // driver descriptor corresponding to frequency band 1
volatile unsigned* d_map_base2; // driver memory map corresponding to frequency band 2
int d_device_descriptor2; // driver descriptor corresponding to frequency band 2
uint32_t d_num_freq_bands; // number of frequency bands
};