961 lines
23 KiB
C++
961 lines
23 KiB
C++
/*
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* Device support for Ettus Research UHD driver
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* Written by Thomas Tsou <ttsou@vt.edu>
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*
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* Copyright 2010,2011 Free Software Foundation, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* This program 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* See the COPYING file in the main directory for details.
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*/
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#include "radioDevice.h"
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#include "Threads.h"
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#include "Logger.h"
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#include <uhd/property_tree.hpp>
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#include <uhd/usrp/single_usrp.hpp>
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#include <uhd/utils/thread_priority.hpp>
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#include <uhd/utils/msg.hpp>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/*
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master_clk_rt - Master clock frequency - ignored if host resampling is
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enabled
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rx_smpl_offset - Timing correction in seconds between receive and
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transmit timestamps. This value corrects for delays on
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on the RF side of the timestamping point of the device.
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This value is generally empirically measured.
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smpl_buf_sz - The receive sample buffer size in bytes.
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tx_ampl - Transmit amplitude must be between 0 and 1.0
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*/
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const double master_clk_rt = 52e6;
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const size_t smpl_buf_sz = (1 << 20);
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const float tx_ampl = .3;
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#ifdef RESAMPLE
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const double rx_smpl_offset = .00005;
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#else
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const double rx_smpl_offset = .0000869;
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#endif
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/** Timestamp conversion
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@param timestamp a UHD or OpenBTS timestamp
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@param rate sample rate
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@return the converted timestamp
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*/
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uhd::time_spec_t convert_time(TIMESTAMP ticks, double rate)
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{
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double secs = (double) ticks / rate;
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return uhd::time_spec_t(secs);
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}
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TIMESTAMP convert_time(uhd::time_spec_t ts, double rate)
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{
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TIMESTAMP ticks = ts.get_full_secs() * rate;
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return ts.get_tick_count(rate) + ticks;
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}
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/*
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Sample Buffer - Allows reading and writing of timed samples using OpenBTS
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or UHD style timestamps. Time conversions are handled
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internally or accessable through the static convert calls.
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*/
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class smpl_buf {
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public:
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/** Sample buffer constructor
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@param len number of 32-bit samples the buffer should hold
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@param rate sample clockrate
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@param timestamp
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*/
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smpl_buf(size_t len, double rate);
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~smpl_buf();
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/** Query number of samples available for reading
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@param timestamp time of first sample
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@return number of available samples or error
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*/
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ssize_t avail_smpls(TIMESTAMP timestamp) const;
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ssize_t avail_smpls(uhd::time_spec_t timestamp) const;
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/** Read and write
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@param buf pointer to buffer
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@param len number of samples desired to read or write
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@param timestamp time of first stample
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@return number of actual samples read or written or error
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*/
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ssize_t read(void *buf, size_t len, TIMESTAMP timestamp);
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ssize_t read(void *buf, size_t len, uhd::time_spec_t timestamp);
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ssize_t write(void *buf, size_t len, TIMESTAMP timestamp);
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ssize_t write(void *buf, size_t len, uhd::time_spec_t timestamp);
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/** Buffer status string
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@return a formatted string describing internal buffer state
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*/
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std::string str_status() const;
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/** Formatted error string
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@param code an error code
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@return a formatted error string
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*/
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static std::string str_code(ssize_t code);
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enum err_code {
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ERROR_TIMESTAMP = -1,
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ERROR_READ = -2,
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ERROR_WRITE = -3,
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ERROR_OVERFLOW = -4
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};
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private:
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uint32_t *data;
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size_t buf_len;
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double clk_rt;
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TIMESTAMP time_start;
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TIMESTAMP time_end;
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size_t data_start;
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size_t data_end;
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};
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/*
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uhd_device - UHD implementation of the Device interface. Timestamped samples
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are sent to and received from the device. An intermediate buffer
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on the receive side collects and aligns packets of samples.
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Events and errors such as underruns are reported asynchronously
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by the device and received in a separate thread.
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*/
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class uhd_device : public RadioDevice {
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public:
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uhd_device(double rate, bool skip_rx);
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~uhd_device();
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bool open();
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bool start();
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bool stop();
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void restart(uhd::time_spec_t ts);
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void setPriority();
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enum busType getBus() { return bus; }
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int readSamples(short *buf, int len, bool *overrun,
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TIMESTAMP timestamp, bool *underrun, unsigned *RSSI);
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int writeSamples(short *buf, int len, bool *underrun,
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TIMESTAMP timestamp, bool isControl);
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bool updateAlignment(TIMESTAMP timestamp);
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bool setTxFreq(double wFreq);
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bool setRxFreq(double wFreq);
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inline TIMESTAMP initialWriteTimestamp() { return 0; }
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inline TIMESTAMP initialReadTimestamp() { return 0; }
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inline double fullScaleInputValue() { return 32000 * tx_ampl; }
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inline double fullScaleOutputValue() { return 32000; }
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double setRxGain(double db);
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double getRxGain(void) { return rx_gain; }
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double maxRxGain(void) { return rx_gain_max; }
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double minRxGain(void) { return rx_gain_min; }
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double setTxGain(double db);
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double maxTxGain(void) { return tx_gain_max; }
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double minTxGain(void) { return tx_gain_min; }
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double getTxFreq() { return tx_freq; }
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double getRxFreq() { return rx_freq; }
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inline double getSampleRate() { return actual_smpl_rt; }
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inline double numberRead() { return rx_pkt_cnt; }
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inline double numberWritten() { return 0; }
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/** Receive and process asynchronous message
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@return true if message received or false on timeout or error
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*/
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bool recv_async_msg();
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enum err_code {
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ERROR_TIMING = -1,
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ERROR_UNRECOVERABLE = -2,
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ERROR_UNHANDLED = -3,
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};
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private:
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uhd::usrp::single_usrp::sptr usrp_dev;
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enum busType bus;
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double desired_smpl_rt, actual_smpl_rt;
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double tx_gain, tx_gain_min, tx_gain_max;
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double rx_gain, rx_gain_min, rx_gain_max;
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double tx_freq, rx_freq;
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size_t tx_spp, rx_spp;
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bool started;
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bool aligned;
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bool skip_rx;
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size_t rx_pkt_cnt;
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size_t drop_cnt;
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uhd::time_spec_t prev_ts;
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TIMESTAMP ts_offset;
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smpl_buf *rx_smpl_buf;
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void init_gains();
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void set_ref_clk(bool ext_clk);
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double set_rates(double rate);
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bool parse_dev_type();
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bool flush_recv(size_t num_pkts);
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int check_rx_md_err(uhd::rx_metadata_t &md, ssize_t num_smpls);
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std::string str_code(uhd::rx_metadata_t metadata);
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std::string str_code(uhd::async_metadata_t metadata);
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Thread async_event_thrd;
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};
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void *async_event_loop(uhd_device *dev)
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{
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while (1) {
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dev->recv_async_msg();
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pthread_testcancel();
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}
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}
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/*
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Catch and drop underrun 'U' and overrun 'O' messages from stdout
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since we already report using the logging facility. Direct
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everything else appropriately.
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*/
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void uhd_msg_handler(uhd::msg::type_t type, const std::string &msg)
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{
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switch (type) {
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case uhd::msg::status:
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LOG(INFO) << msg;
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break;
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case uhd::msg::warning:
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LOG(WARN) << msg;
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break;
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case uhd::msg::error:
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LOG(ERROR) << msg;
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break;
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case uhd::msg::fastpath:
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break;
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}
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}
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uhd_device::uhd_device(double rate, bool skip_rx)
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: desired_smpl_rt(rate), actual_smpl_rt(0),
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tx_gain(0.0), tx_gain_min(0.0), tx_gain_max(0.0),
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rx_gain(0.0), rx_gain_min(0.0), rx_gain_max(0.0),
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tx_freq(0.0), rx_freq(0.0), tx_spp(0), rx_spp(0),
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started(false), aligned(false), rx_pkt_cnt(0), drop_cnt(0),
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prev_ts(0,0), ts_offset(0), rx_smpl_buf(NULL)
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{
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this->skip_rx = skip_rx;
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}
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uhd_device::~uhd_device()
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{
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stop();
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if (rx_smpl_buf)
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delete rx_smpl_buf;
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}
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void uhd_device::init_gains()
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{
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uhd::gain_range_t range;
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range = usrp_dev->get_tx_gain_range();
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tx_gain_min = range.start();
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tx_gain_max = range.stop();
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range = usrp_dev->get_rx_gain_range();
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rx_gain_min = range.start();
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rx_gain_max = range.stop();
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usrp_dev->set_tx_gain((tx_gain_min + tx_gain_max) / 2);
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usrp_dev->set_rx_gain((rx_gain_min + rx_gain_max) / 2);
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tx_gain = usrp_dev->get_tx_gain();
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rx_gain = usrp_dev->get_rx_gain();
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return;
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}
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void uhd_device::set_ref_clk(bool ext_clk)
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{
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uhd::clock_config_t clk_cfg;
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clk_cfg.pps_source = uhd::clock_config_t::PPS_SMA;
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if (ext_clk)
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clk_cfg.ref_source = uhd::clock_config_t::REF_SMA;
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else
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clk_cfg.ref_source = uhd::clock_config_t::REF_INT;
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usrp_dev->set_clock_config(clk_cfg);
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return;
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}
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double uhd_device::set_rates(double rate)
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{
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double actual_rt, actual_clk_rt;
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#ifndef RESAMPLE
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// Set master clock rate
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usrp_dev->set_master_clock_rate(master_clk_rt);
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actual_clk_rt = usrp_dev->get_master_clock_rate();
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if (actual_clk_rt != master_clk_rt) {
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LOG(ERROR) << "Failed to set master clock rate";
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return -1.0;
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}
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#endif
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// Set sample rates
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usrp_dev->set_tx_rate(rate);
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usrp_dev->set_rx_rate(rate);
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actual_rt = usrp_dev->get_tx_rate();
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if (actual_rt != rate) {
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LOG(ERROR) << "Actual sample rate differs from desired rate";
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return -1.0;
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}
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if (usrp_dev->get_rx_rate() != actual_rt) {
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LOG(ERROR) << "Transmit and receive sample rates do not match";
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return -1.0;
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}
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return actual_rt;
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}
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double uhd_device::setTxGain(double db)
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{
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usrp_dev->set_tx_gain(db);
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tx_gain = usrp_dev->get_tx_gain();
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LOG(INFO) << "Set TX gain to " << tx_gain << "dB";
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return tx_gain;
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}
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double uhd_device::setRxGain(double db)
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{
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usrp_dev->set_rx_gain(db);
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rx_gain = usrp_dev->get_rx_gain();
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LOG(INFO) << "Set RX gain to " << rx_gain << "dB";
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return rx_gain;
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}
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/*
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Parse the UHD device tree and mboard name to find out what device we're
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dealing with. We need the bus type so that the transceiver knows how to
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deal with the transport latency. Reject the USRP1 because UHD doesn't
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support timestamped samples with it.
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*/
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bool uhd_device::parse_dev_type()
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{
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std::string mboard_str, dev_str;
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uhd::property_tree::sptr prop_tree;
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size_t usrp1_str, usrp2_str, b100_str1, b100_str2;
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prop_tree = usrp_dev->get_device()->get_tree();
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dev_str = prop_tree->access<std::string>("/name").get();
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mboard_str = usrp_dev->get_mboard_name();
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usrp1_str = dev_str.find("USRP1");
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b100_str1 = dev_str.find("B-Series");
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b100_str2 = mboard_str.find("B100");
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if (usrp1_str != std::string::npos) {
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LOG(ERROR) << "USRP1 is not supported using UHD driver";
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return false;
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}
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if ((b100_str1 != std::string::npos) || (b100_str2 != std::string::npos)) {
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bus = USB;
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LOG(INFO) << "Using USB bus for " << dev_str;
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} else {
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bus = NET;
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LOG(INFO) << "Using network bus for " << dev_str;
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}
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return true;
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}
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bool uhd_device::open()
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{
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// Register msg handler
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uhd::msg::register_handler(&uhd_msg_handler);
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// Allow all UHD devices
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LOG(INFO) << "Creating transceiver with first found UHD device";
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uhd::device_addr_t dev_addr("");
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try {
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usrp_dev = uhd::usrp::single_usrp::make(dev_addr);
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} catch(...) {
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LOG(ERROR) << "UHD make failed";
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return false;
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}
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#ifdef EXTREF
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set_ref_clk(true);
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#endif
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// Number of samples per over-the-wire packet
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tx_spp = usrp_dev->get_device()->get_max_send_samps_per_packet();
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rx_spp = usrp_dev->get_device()->get_max_recv_samps_per_packet();
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// Set rates
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actual_smpl_rt = set_rates(desired_smpl_rt);
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if (actual_smpl_rt < 0)
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return false;
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// Create receive buffer
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size_t buf_len = smpl_buf_sz / sizeof(uint32_t);
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rx_smpl_buf = new smpl_buf(buf_len, actual_smpl_rt);
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// Set receive chain sample offset
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ts_offset = (TIMESTAMP)(rx_smpl_offset * actual_smpl_rt);
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// Initialize and shadow gain values
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init_gains();
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// Print configuration
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LOG(INFO) << "\n" << usrp_dev->get_pp_string();
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// Check for a valid device type and set bus type
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if (!parse_dev_type())
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return false;
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return true;
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}
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bool uhd_device::flush_recv(size_t num_pkts)
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{
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uhd::rx_metadata_t md;
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size_t num_smpls;
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uint32_t buff[rx_spp];
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float timeout;
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// Use .01 sec instead of the default .1 sec
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timeout = .01;
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for (size_t i = 0; i < num_pkts; i++) {
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num_smpls = usrp_dev->get_device()->recv(
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buff,
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rx_spp,
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md,
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uhd::io_type_t::COMPLEX_INT16,
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uhd::device::RECV_MODE_ONE_PACKET,
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timeout);
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if (!num_smpls) {
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switch (md.error_code) {
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case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
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return true;
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default:
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continue;
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}
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}
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}
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return true;
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}
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void uhd_device::restart(uhd::time_spec_t ts)
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{
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uhd::stream_cmd_t cmd = uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS;
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usrp_dev->issue_stream_cmd(cmd);
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flush_recv(50);
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usrp_dev->set_time_now(ts);
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aligned = false;
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cmd = uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS;
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cmd.stream_now = true;
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usrp_dev->issue_stream_cmd(cmd);
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}
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bool uhd_device::start()
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{
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LOG(INFO) << "Starting USRP...";
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if (started) {
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LOG(ERROR) << "Device already started";
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return false;
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}
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setPriority();
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// Start asynchronous event (underrun check) loop
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async_event_thrd.start((void * (*)(void*))async_event_loop, (void*)this);
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// Start streaming
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restart(uhd::time_spec_t(0.0));
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// Display usrp time
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double time_now = usrp_dev->get_time_now().get_real_secs();
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LOG(INFO) << "The current time is " << time_now << " seconds";
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started = true;
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return true;
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}
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bool uhd_device::stop()
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{
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uhd::stream_cmd_t stream_cmd =
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uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS;
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usrp_dev->issue_stream_cmd(stream_cmd);
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|
|
started = false;
|
|
return true;
|
|
}
|
|
|
|
void uhd_device::setPriority()
|
|
{
|
|
uhd::set_thread_priority_safe();
|
|
return;
|
|
}
|
|
|
|
int uhd_device::check_rx_md_err(uhd::rx_metadata_t &md, ssize_t num_smpls)
|
|
{
|
|
uhd::time_spec_t ts;
|
|
|
|
if (!num_smpls) {
|
|
LOG(ERROR) << str_code(md);
|
|
|
|
switch (md.error_code) {
|
|
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
|
|
return ERROR_UNRECOVERABLE;
|
|
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
|
|
case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
|
|
case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN:
|
|
case uhd::rx_metadata_t::ERROR_CODE_BAD_PACKET:
|
|
default:
|
|
return ERROR_UNHANDLED;
|
|
}
|
|
}
|
|
|
|
// Missing timestamp
|
|
if (!md.has_time_spec) {
|
|
LOG(ERROR) << "UHD: Received packet missing timestamp";
|
|
return ERROR_UNRECOVERABLE;
|
|
}
|
|
|
|
ts = md.time_spec;
|
|
|
|
// Monotonicity check
|
|
if (ts < prev_ts) {
|
|
LOG(ERROR) << "UHD: Loss of monotonic: " << ts.get_real_secs();
|
|
LOG(ERROR) << "UHD: Previous time: " << prev_ts.get_real_secs();
|
|
return ERROR_TIMING;
|
|
} else {
|
|
prev_ts = ts;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int uhd_device::readSamples(short *buf, int len, bool *overrun,
|
|
TIMESTAMP timestamp, bool *underrun, unsigned *RSSI)
|
|
{
|
|
ssize_t rc;
|
|
uhd::time_spec_t ts;
|
|
uhd::rx_metadata_t metadata;
|
|
uint32_t pkt_buf[rx_spp];
|
|
|
|
if (skip_rx)
|
|
return 0;
|
|
|
|
// Shift read time with respect to transmit clock
|
|
timestamp += ts_offset;
|
|
|
|
ts = convert_time(timestamp, actual_smpl_rt);
|
|
LOG(DEEPDEBUG) << "Requested timestamp = " << ts.get_real_secs();
|
|
|
|
// Check that timestamp is valid
|
|
rc = rx_smpl_buf->avail_smpls(timestamp);
|
|
if (rc < 0) {
|
|
LOG(ERROR) << rx_smpl_buf->str_code(rc);
|
|
LOG(ERROR) << rx_smpl_buf->str_status();
|
|
return 0;
|
|
}
|
|
|
|
// Receive samples from the usrp until we have enough
|
|
while (rx_smpl_buf->avail_smpls(timestamp) < len) {
|
|
size_t num_smpls = usrp_dev->get_device()->recv(
|
|
(void*)pkt_buf,
|
|
rx_spp,
|
|
metadata,
|
|
uhd::io_type_t::COMPLEX_INT16,
|
|
uhd::device::RECV_MODE_ONE_PACKET);
|
|
|
|
rx_pkt_cnt++;
|
|
|
|
// Check for errors
|
|
rc = check_rx_md_err(metadata, num_smpls);
|
|
switch (rc) {
|
|
case ERROR_UNRECOVERABLE:
|
|
LOG(ERROR) << "UHD: Unrecoverable error, exiting.";
|
|
exit(-1);
|
|
case ERROR_TIMING:
|
|
restart(prev_ts);
|
|
case ERROR_UNHANDLED:
|
|
continue;
|
|
}
|
|
|
|
|
|
ts = metadata.time_spec;
|
|
LOG(DEEPDEBUG) << "Received timestamp = " << ts.get_real_secs();
|
|
|
|
rc = rx_smpl_buf->write(pkt_buf,
|
|
num_smpls,
|
|
metadata.time_spec);
|
|
|
|
// Continue on local overrun, exit on other errors
|
|
if ((rc < 0)) {
|
|
LOG(ERROR) << rx_smpl_buf->str_code(rc);
|
|
LOG(ERROR) << rx_smpl_buf->str_status();
|
|
if (rc != smpl_buf::ERROR_OVERFLOW)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// We have enough samples
|
|
rc = rx_smpl_buf->read(buf, len, timestamp);
|
|
if ((rc < 0) || (rc != len)) {
|
|
LOG(ERROR) << rx_smpl_buf->str_code(rc);
|
|
LOG(ERROR) << rx_smpl_buf->str_status();
|
|
return 0;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
int uhd_device::writeSamples(short *buf, int len, bool *underrun,
|
|
unsigned long long timestamp,bool isControl)
|
|
{
|
|
uhd::tx_metadata_t metadata;
|
|
metadata.has_time_spec = true;
|
|
metadata.start_of_burst = false;
|
|
metadata.end_of_burst = false;
|
|
metadata.time_spec = convert_time(timestamp, actual_smpl_rt);
|
|
|
|
// No control packets
|
|
if (isControl) {
|
|
LOG(ERROR) << "Control packets not supported";
|
|
return 0;
|
|
}
|
|
|
|
// Drop a fixed number of packets (magic value)
|
|
if (!aligned) {
|
|
drop_cnt++;
|
|
|
|
if (drop_cnt == 1) {
|
|
LOG(DEBUG) << "Aligning transmitter: stop burst";
|
|
metadata.end_of_burst = true;
|
|
} else if (drop_cnt < 30) {
|
|
LOG(DEEPDEBUG) << "Aligning transmitter: packet advance";
|
|
*underrun = true;
|
|
return len;
|
|
} else {
|
|
LOG(DEBUG) << "Aligning transmitter: start burst";
|
|
metadata.start_of_burst = true;
|
|
aligned = true;
|
|
drop_cnt = 0;
|
|
}
|
|
}
|
|
|
|
size_t num_smpls = usrp_dev->get_device()->send(buf,
|
|
len,
|
|
metadata,
|
|
uhd::io_type_t::COMPLEX_INT16,
|
|
uhd::device::SEND_MODE_FULL_BUFF);
|
|
|
|
if (num_smpls != (unsigned)len)
|
|
LOG(ERROR) << "UHD: Sent fewer samples than requested";
|
|
|
|
return num_smpls;
|
|
}
|
|
|
|
bool uhd_device::updateAlignment(TIMESTAMP timestamp)
|
|
{
|
|
aligned = false;
|
|
return true;
|
|
}
|
|
|
|
bool uhd_device::setTxFreq(double wFreq)
|
|
{
|
|
uhd::tune_result_t tr = usrp_dev->set_tx_freq(wFreq);
|
|
LOG(INFO) << "\n" << tr.to_pp_string();
|
|
tx_freq = usrp_dev->get_tx_freq();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool uhd_device::setRxFreq(double wFreq)
|
|
{
|
|
uhd::tune_result_t tr = usrp_dev->set_rx_freq(wFreq);
|
|
LOG(INFO) << "\n" << tr.to_pp_string();
|
|
rx_freq = usrp_dev->get_rx_freq();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool uhd_device::recv_async_msg()
|
|
{
|
|
uhd::async_metadata_t metadata;
|
|
if (!usrp_dev->get_device()->recv_async_msg(metadata))
|
|
return false;
|
|
|
|
// Assume that any error requires resynchronization
|
|
if (metadata.event_code != uhd::async_metadata_t::EVENT_CODE_BURST_ACK) {
|
|
aligned = false;
|
|
LOG(ERROR) << str_code(metadata);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
std::string uhd_device::str_code(uhd::rx_metadata_t metadata)
|
|
{
|
|
std::ostringstream ost("UHD: ");
|
|
|
|
switch (metadata.error_code) {
|
|
case uhd::rx_metadata_t::ERROR_CODE_NONE:
|
|
ost << "No error";
|
|
break;
|
|
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
|
|
ost << "No packet received, implementation timed-out";
|
|
break;
|
|
case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
|
|
ost << "A stream command was issued in the past";
|
|
break;
|
|
case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN:
|
|
ost << "Expected another stream command";
|
|
break;
|
|
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
|
|
ost << "An internal receive buffer has filled";
|
|
break;
|
|
case uhd::rx_metadata_t::ERROR_CODE_BAD_PACKET:
|
|
ost << "The packet could not be parsed";
|
|
break;
|
|
default:
|
|
ost << "Unknown error " << metadata.error_code;
|
|
}
|
|
|
|
if (metadata.has_time_spec)
|
|
ost << " at " << metadata.time_spec.get_real_secs() << " sec.";
|
|
|
|
return ost.str();
|
|
}
|
|
|
|
std::string uhd_device::str_code(uhd::async_metadata_t metadata)
|
|
{
|
|
std::ostringstream ost("UHD: ");
|
|
|
|
switch (metadata.event_code) {
|
|
case uhd::async_metadata_t::EVENT_CODE_BURST_ACK:
|
|
ost << "A packet was successfully transmitted";
|
|
break;
|
|
case uhd::async_metadata_t::EVENT_CODE_UNDERFLOW:
|
|
ost << "An internal send buffer has emptied";
|
|
break;
|
|
case uhd::async_metadata_t::EVENT_CODE_SEQ_ERROR:
|
|
ost << "Packet loss between host and device";
|
|
break;
|
|
case uhd::async_metadata_t::EVENT_CODE_TIME_ERROR:
|
|
ost << "Packet time was too late or too early";
|
|
break;
|
|
case uhd::async_metadata_t::EVENT_CODE_UNDERFLOW_IN_PACKET:
|
|
ost << "Underflow occurred inside a packet";
|
|
break;
|
|
case uhd::async_metadata_t::EVENT_CODE_SEQ_ERROR_IN_BURST:
|
|
ost << "Packet loss within a burst";
|
|
break;
|
|
default:
|
|
ost << "Unknown error " << metadata.event_code;
|
|
}
|
|
|
|
if (metadata.has_time_spec)
|
|
ost << " at " << metadata.time_spec.get_real_secs() << " sec.";
|
|
|
|
return ost.str();
|
|
}
|
|
|
|
smpl_buf::smpl_buf(size_t len, double rate)
|
|
: buf_len(len), clk_rt(rate),
|
|
time_start(0), time_end(0), data_start(0), data_end(0)
|
|
{
|
|
data = new uint32_t[len];
|
|
}
|
|
|
|
smpl_buf::~smpl_buf()
|
|
{
|
|
delete[] data;
|
|
}
|
|
|
|
ssize_t smpl_buf::avail_smpls(TIMESTAMP timestamp) const
|
|
{
|
|
if (timestamp < time_start)
|
|
return ERROR_TIMESTAMP;
|
|
else if (timestamp >= time_end)
|
|
return 0;
|
|
else
|
|
return time_end - timestamp;
|
|
}
|
|
|
|
ssize_t smpl_buf::avail_smpls(uhd::time_spec_t timespec) const
|
|
{
|
|
return avail_smpls(convert_time(timespec, clk_rt));
|
|
}
|
|
|
|
ssize_t smpl_buf::read(void *buf, size_t len, TIMESTAMP timestamp)
|
|
{
|
|
int type_sz = 2 * sizeof(short);
|
|
|
|
// Check for valid read
|
|
if (timestamp < time_start)
|
|
return ERROR_TIMESTAMP;
|
|
if (timestamp >= time_end)
|
|
return 0;
|
|
if (len >= buf_len)
|
|
return ERROR_READ;
|
|
|
|
// How many samples should be copied
|
|
size_t num_smpls = time_end - timestamp;
|
|
if (num_smpls > len);
|
|
num_smpls = len;
|
|
|
|
// Starting index
|
|
size_t read_start = data_start + (timestamp - time_start);
|
|
|
|
// Read it
|
|
if (read_start + num_smpls < buf_len) {
|
|
size_t numBytes = len * type_sz;
|
|
memcpy(buf, data + read_start, numBytes);
|
|
} else {
|
|
size_t first_cp = (buf_len - read_start) * type_sz;
|
|
size_t second_cp = len * type_sz - first_cp;
|
|
|
|
memcpy(buf, data + read_start, first_cp);
|
|
memcpy((char*) buf + first_cp, data, second_cp);
|
|
}
|
|
|
|
data_start = (read_start + len) % buf_len;
|
|
time_start = timestamp + len;
|
|
|
|
if (time_start > time_end)
|
|
return ERROR_READ;
|
|
else
|
|
return num_smpls;
|
|
}
|
|
|
|
ssize_t smpl_buf::read(void *buf, size_t len, uhd::time_spec_t ts)
|
|
{
|
|
return read(buf, len, convert_time(ts, clk_rt));
|
|
}
|
|
|
|
ssize_t smpl_buf::write(void *buf, size_t len, TIMESTAMP timestamp)
|
|
{
|
|
int type_sz = 2 * sizeof(short);
|
|
|
|
// Check for valid write
|
|
if ((len == 0) || (len >= buf_len))
|
|
return ERROR_WRITE;
|
|
if ((timestamp + len) <= time_end)
|
|
return ERROR_TIMESTAMP;
|
|
|
|
// Starting index
|
|
size_t write_start = (data_start + (timestamp - time_start)) % buf_len;
|
|
|
|
// Write it
|
|
if ((write_start + len) < buf_len) {
|
|
size_t numBytes = len * type_sz;
|
|
memcpy(data + write_start, buf, numBytes);
|
|
} else {
|
|
size_t first_cp = (buf_len - write_start) * type_sz;
|
|
size_t second_cp = len * type_sz - first_cp;
|
|
|
|
memcpy(data + write_start, buf, first_cp);
|
|
memcpy(data, (char*) buf + first_cp, second_cp);
|
|
}
|
|
|
|
data_end = (write_start + len) % buf_len;
|
|
time_end = timestamp + len;
|
|
|
|
if (((write_start + len) > buf_len) && (data_end > data_start))
|
|
return ERROR_OVERFLOW;
|
|
else if (time_end <= time_start)
|
|
return ERROR_WRITE;
|
|
else
|
|
return len;
|
|
}
|
|
|
|
ssize_t smpl_buf::write(void *buf, size_t len, uhd::time_spec_t ts)
|
|
{
|
|
return write(buf, len, convert_time(ts, clk_rt));
|
|
}
|
|
|
|
std::string smpl_buf::str_status() const
|
|
{
|
|
std::ostringstream ost("Sample buffer: ");
|
|
|
|
ost << "length = " << buf_len;
|
|
ost << ", time_start = " << time_start;
|
|
ost << ", time_end = " << time_end;
|
|
ost << ", data_start = " << data_start;
|
|
ost << ", data_end = " << data_end;
|
|
|
|
return ost.str();
|
|
}
|
|
|
|
std::string smpl_buf::str_code(ssize_t code)
|
|
{
|
|
switch (code) {
|
|
case ERROR_TIMESTAMP:
|
|
return "Sample buffer: Requested timestamp is not valid";
|
|
case ERROR_READ:
|
|
return "Sample buffer: Read error";
|
|
case ERROR_WRITE:
|
|
return "Sample buffer: Write error";
|
|
case ERROR_OVERFLOW:
|
|
return "Sample buffer: Overrun";
|
|
default:
|
|
return "Sample buffer: Unknown error";
|
|
}
|
|
}
|
|
|
|
RadioDevice *RadioDevice::make(double smpl_rt, bool skip_rx)
|
|
{
|
|
return new uhd_device(smpl_rt, skip_rx);
|
|
}
|