1 files changed, 217 insertions, 0 deletions
diff --git a/host/utils/usrp_cal_utils.hpp b/host/utils/usrp_cal_utils.hpp
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+++ b/host/utils/usrp_cal_utils.hpp
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+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program 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.
+//
+// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/paths.hpp>
+#include <uhd/property_tree.hpp>
+#include <uhd/usrp/multi_usrp.hpp>
+#include <uhd/usrp/dboard_eeprom.hpp>
+#include <boost/filesystem.hpp>
+#include <iostream>
+#include <vector>
+#include <complex>
+#include <cmath>
+#include <fstream>
+
+namespace fs = boost::filesystem;
+
+struct result_t{double freq, real_corr, imag_corr, best, delta;};
+
+typedef std::complex<float> samp_type;
+
+/***********************************************************************
+ * Constants
+ **********************************************************************/
+static const double tau = 6.28318531;
+static const size_t wave_table_len = 8192;
+static const size_t num_search_steps = 5;
+static const size_t num_search_iters = 7;
+static const double default_freq_step = 7.3e6;
+static const size_t default_num_samps = 10000;
+
+/***********************************************************************
+ * Set standard defaults for devices
+ **********************************************************************/
+static inline void set_optimum_defaults(uhd::usrp::multi_usrp::sptr usrp){
+    uhd::property_tree::sptr tree = usrp->get_device()->get_tree();
+
+    const uhd::fs_path mb_path = "/mboards/0";
+    const std::string mb_name = tree->access<std::string>(mb_path / "name").get();
+    if (mb_name.find("USRP2") != std::string::npos or mb_name.find("N200") != std::string::npos or mb_name.find("N210") != std::string::npos){
+        usrp->set_tx_rate(12.5e6);
+        usrp->set_rx_rate(12.5e6);
+    }
+    else if (mb_name.find("B100") != std::string::npos){
+        usrp->set_tx_rate(4e6);
+        usrp->set_rx_rate(4e6);
+    }
+    else if (mb_name.find("E100") != std::string::npos or mb_name.find("E110") != std::string::npos){
+        usrp->set_tx_rate(4e6);
+        usrp->set_rx_rate(8e6);
+    }
+    else{
+        throw std::runtime_error("self-calibration is not supported for this hardware");
+    }
+
+    const uhd::fs_path tx_fe_path = "/mboards/0/dboards/A/tx_frontends/0";
+    const std::string tx_name = tree->access<std::string>(tx_fe_path / "name").get();
+    if (tx_name.find("WBX") != std::string::npos or tx_name.find("SBX") != std::string::npos){
+        usrp->set_tx_gain(0);
+    }
+    else{
+        throw std::runtime_error("self-calibration is not supported for this hardware");
+    }
+
+    const uhd::fs_path rx_fe_path = "/mboards/0/dboards/A/tx_frontends/0";
+    const std::string rx_name = tree->access<std::string>(rx_fe_path / "name").get();
+    if (rx_name.find("WBX") != std::string::npos or rx_name.find("SBX") != std::string::npos){
+        usrp->set_rx_gain(25);
+    }
+    else{
+        throw std::runtime_error("self-calibration is not supported for this hardware");
+    }
+
+}
+
+/***********************************************************************
+ * Sinusoid wave table
+ **********************************************************************/
+class wave_table{
+public:
+    wave_table(const double ampl){
+        _table.resize(wave_table_len);
+        for (size_t i = 0; i < wave_table_len; i++){
+            _table[i] = samp_type(std::polar(ampl, (tau*i)/wave_table_len));
+        }
+    }
+
+    inline samp_type operator()(const size_t index) const{
+        return _table[index % wave_table_len];
+    }
+
+private:
+    std::vector<samp_type > _table;
+};
+
+/***********************************************************************
+ * Compute power of a tone
+ **********************************************************************/
+static inline double compute_tone_dbrms(
+    const std::vector<samp_type > &samples,
+    const double freq //freq is fractional
+){
+    //shift the samples so the tone at freq is down at DC
+    //and average the samples to measure the DC component
+    samp_type average = 0;
+    for (size_t i = 0; i < samples.size(); i++){
+        average += samp_type(std::polar(1.0, -freq*tau*i)) * samples[i];
+    }
+
+    return 20*std::log10(std::abs(average/float(samples.size())));
+}
+
+/***********************************************************************
+ * Write a dat file
+ **********************************************************************/
+static inline void write_samples_to_file(
+    const std::vector<samp_type > &samples, const std::string &file
+){
+    std::ofstream outfile(file.c_str(), std::ofstream::binary);
+    outfile.write((const char*)&samples.front(), samples.size()*sizeof(samp_type));
+    outfile.close();
+}
+
+/***********************************************************************
+ * Store data to file
+ **********************************************************************/
+static void store_results(
+    uhd::usrp::multi_usrp::sptr usrp,
+    const std::vector<result_t> &results,
+    const std::string &XX,
+    const std::string &xx,
+    const std::string &what
+){
+    //extract eeprom serial
+    uhd::property_tree::sptr tree = usrp->get_device()->get_tree();
+    const uhd::fs_path db_path = "/mboards/0/dboards/A/" + xx + "_eeprom";
+    const uhd::usrp::dboard_eeprom_t db_eeprom = tree->access<uhd::usrp::dboard_eeprom_t>(db_path).get();
+    if (db_eeprom.serial.empty()) throw std::runtime_error(XX + " dboard has empty serial!");
+
+    //make the calibration file path
+    fs::path cal_data_path = fs::path(uhd::get_app_path()) / ".uhd";
+    fs::create_directory(cal_data_path);
+    cal_data_path = cal_data_path / "cal";
+    fs::create_directory(cal_data_path);
+    cal_data_path = cal_data_path / str(boost::format("%s_%s_cal_v0.2_%s.csv") % xx % what % db_eeprom.serial);
+    if (fs::exists(cal_data_path)){
+        fs::rename(cal_data_path, cal_data_path.string() + str(boost::format(".%d") % time(NULL)));
+    }
+
+    //fill the calibration file
+    std::ofstream cal_data(cal_data_path.string().c_str());
+    cal_data << boost::format("name, %s Frontend Calibration\n") % XX;
+    cal_data << boost::format("serial, %s\n") % db_eeprom.serial;
+    cal_data << boost::format("timestamp, %d\n") % time(NULL);
+    cal_data << boost::format("version, 0, 1\n");
+    cal_data << boost::format("DATA STARTS HERE\n");
+    cal_data << "lo_frequency, correction_real, correction_imag, measured, delta\n";
+
+    for (size_t i = 0; i < results.size(); i++){
+        cal_data
+            << results[i].freq << ", "
+            << results[i].real_corr << ", "
+            << results[i].imag_corr << ", "
+            << results[i].best << ", "
+            << results[i].delta << "\n"
+        ;
+    }
+
+    std::cout << "wrote cal data to " << cal_data_path << std::endl;
+}
+
+/***********************************************************************
+ * Data capture routine
+ **********************************************************************/
+static void capture_samples(
+    uhd::usrp::multi_usrp::sptr usrp,
+    uhd::rx_streamer::sptr rx_stream,
+    std::vector<samp_type > &buff,
+    const size_t nsamps_requested
+){
+    buff.resize(nsamps_requested);
+    uhd::rx_metadata_t md;
+
+    uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
+    stream_cmd.num_samps = buff.size();
+    stream_cmd.stream_now = true;
+    usrp->issue_stream_cmd(stream_cmd);
+    const size_t num_rx_samps = rx_stream->recv(&buff.front(), buff.size(), md);
+
+    //validate the received data
+    if (md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE){
+        throw std::runtime_error(str(boost::format(
+            "Unexpected error code 0x%x"
+        ) % md.error_code));
+    }
+    //we can live if all the data didnt come in
+    if (num_rx_samps > buff.size()/2){
+        buff.resize(num_rx_samps);
+        return;
+    }
+    if (num_rx_samps != buff.size()){
+        throw std::runtime_error("did not get all the samples requested");
+    }
+}