1 files changed, 628 insertions, 0 deletions
diff --git a/gr-uhd/lib/usrp_source_impl.cc b/gr-uhd/lib/usrp_source_impl.cc
new file mode 100644
index 0000000000..9d6a55ae5a
--- /dev/null
+++ b/gr-uhd/lib/usrp_source_impl.cc
@@ -0,0 +1,628 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2010-2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "usrp_source_impl.h"
+#include "gr_uhd_common.h"
+#include <gr_io_signature.h>
+#include <boost/format.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/make_shared.hpp>
+#include <stdexcept>
+#include <iostream>
+
+namespace gr {
+  namespace uhd {
+
+    usrp_source::sptr
+    usrp_source::make(const ::uhd::device_addr_t &device_addr,
+                      const ::uhd::io_type_t &io_type,
+                      size_t num_channels)
+    {
+      //fill in the streamer args
+      ::uhd::stream_args_t stream_args;
+      switch(io_type.tid) {
+      case ::uhd::io_type_t::COMPLEX_FLOAT32: stream_args.cpu_format = "fc32"; break;
+      case ::uhd::io_type_t::COMPLEX_INT16: stream_args.cpu_format = "sc16"; break;
+      default: throw std::runtime_error("only complex float and shorts known to work");
+      }
+
+      stream_args.otw_format = "sc16"; //only sc16 known to work
+      for(size_t chan = 0; chan < num_channels; chan++)
+        stream_args.channels.push_back(chan); //linear mapping
+
+      return usrp_source::make(device_addr, stream_args);
+    }
+
+    usrp_source::sptr
+    usrp_source::make(const ::uhd::device_addr_t &device_addr,
+                      const ::uhd::stream_args_t &stream_args)
+    {
+      check_abi();
+      return usrp_source::sptr
+        (new usrp_source_impl(device_addr, stream_args));
+    }
+
+    usrp_source_impl::usrp_source_impl(const ::uhd::device_addr_t &device_addr,
+                                       const ::uhd::stream_args_t &stream_args):
+      gr_sync_block("gr uhd usrp source",
+                    gr_make_io_signature(0, 0, 0),
+                    args_to_io_sig(stream_args)),
+      _stream_args(stream_args),
+      _nchan(std::max<size_t>(1, stream_args.channels.size())),
+      _stream_now(_nchan == 1),
+      _tag_now(false),
+      _start_time_set(false)
+    {
+      if(stream_args.cpu_format == "fc32")
+        _type = boost::make_shared< ::uhd::io_type_t >(::uhd::io_type_t::COMPLEX_FLOAT32);
+      if(stream_args.cpu_format == "sc16")
+        _type = boost::make_shared< ::uhd::io_type_t >(::uhd::io_type_t::COMPLEX_INT16);
+      std::stringstream str;
+      str << name() << unique_id();
+      _id = pmt::string_to_symbol(str.str());
+      _dev = ::uhd::usrp::multi_usrp::make(device_addr);
+    }
+
+    usrp_source_impl::~usrp_source_impl()
+    {
+    }
+
+    ::uhd::dict<std::string, std::string>
+    usrp_source_impl::get_usrp_info(size_t chan)
+    {
+#ifdef UHD_USRP_MULTI_USRP_GET_USRP_INFO_API
+      return _dev->get_usrp_rx_info(chan);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    void
+    usrp_source_impl::set_subdev_spec(const std::string &spec, size_t mboard)
+    {
+      return _dev->set_rx_subdev_spec(spec, mboard);
+    }
+
+    std::string
+    usrp_source_impl::get_subdev_spec(size_t mboard)
+    {
+      return _dev->get_rx_subdev_spec(mboard).to_string();
+    }
+
+    void
+    usrp_source_impl::set_samp_rate(double rate)
+    {
+      _dev->set_rx_rate(rate);
+      _samp_rate = this->get_samp_rate();
+      _tag_now = true;
+    }
+
+    double 
+    usrp_source_impl::get_samp_rate(void)
+    {
+      return _dev->get_rx_rate();
+    }
+
+    ::uhd::meta_range_t
+    usrp_source_impl::get_samp_rates(void)
+    {
+#ifdef UHD_USRP_MULTI_USRP_GET_RATES_API
+      return _dev->get_rx_rates();
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    ::uhd::tune_result_t
+    usrp_source_impl::set_center_freq(const ::uhd::tune_request_t tune_request,
+                                      size_t chan)
+    {
+      const ::uhd::tune_result_t res = _dev->set_rx_freq(tune_request, chan);
+      _center_freq = this->get_center_freq(chan);
+      _tag_now = true;
+      return res;
+    }
+
+    double
+    usrp_source_impl::get_center_freq(size_t chan)
+    {
+      return _dev->get_rx_freq(chan);
+    }
+
+    ::uhd::freq_range_t
+    usrp_source_impl::get_freq_range(size_t chan)
+    {
+      return _dev->get_rx_freq_range(chan);
+    }
+
+    void
+    usrp_source_impl::set_gain(double gain, size_t chan)
+    {
+      return _dev->set_rx_gain(gain, chan);
+    }
+
+    void
+    usrp_source_impl::set_gain(double gain, const std::string &name, size_t chan)
+    {
+      return _dev->set_rx_gain(gain, name, chan);
+    }
+
+    double
+    usrp_source_impl::get_gain(size_t chan)
+    {
+      return _dev->get_rx_gain(chan);
+    }
+
+    double
+    usrp_source_impl::get_gain(const std::string &name, size_t chan)
+    {
+      return _dev->get_rx_gain(name, chan);
+    }
+
+    std::vector<std::string>
+    usrp_source_impl::get_gain_names(size_t chan)
+    {
+      return _dev->get_rx_gain_names(chan);
+    }
+
+    ::uhd::gain_range_t
+    usrp_source_impl::get_gain_range(size_t chan)
+    {
+      return _dev->get_rx_gain_range(chan);
+    }
+
+    ::uhd::gain_range_t
+    usrp_source_impl::get_gain_range(const std::string &name, size_t chan)
+    {
+      return _dev->get_rx_gain_range(name, chan);
+    }
+
+    void
+    usrp_source_impl::set_antenna(const std::string &ant, size_t chan)
+    {
+      return _dev->set_rx_antenna(ant, chan);
+    }
+
+    std::string
+    usrp_source_impl::get_antenna(size_t chan)
+    {
+      return _dev->get_rx_antenna(chan);
+    }
+
+    std::vector<std::string>
+    usrp_source_impl::get_antennas(size_t chan)
+    {
+      return _dev->get_rx_antennas(chan);
+    }
+
+    void
+    usrp_source_impl::set_bandwidth(double bandwidth, size_t chan)
+    {
+      return _dev->set_rx_bandwidth(bandwidth, chan);
+    }
+
+    void
+    usrp_source_impl::set_auto_dc_offset(const bool enable, size_t chan)
+    {
+#ifdef UHD_USRP_MULTI_USRP_FRONTEND_CAL_API
+      return _dev->set_rx_dc_offset(enable, chan);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    void
+    usrp_source_impl::set_dc_offset(const std::complex<double> &offset,
+                                    size_t chan)
+    {
+#ifdef UHD_USRP_MULTI_USRP_FRONTEND_CAL_API
+      return _dev->set_rx_dc_offset(offset, chan);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    void
+    usrp_source_impl::set_iq_balance(const std::complex<double> &correction,
+                                     size_t chan)
+    {
+#ifdef UHD_USRP_MULTI_USRP_FRONTEND_CAL_API
+      return _dev->set_rx_iq_balance(correction, chan);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    ::uhd::sensor_value_t
+    usrp_source_impl::get_sensor(const std::string &name, size_t chan)
+    {
+      return _dev->get_rx_sensor(name, chan);
+    }
+
+    std::vector<std::string>
+    usrp_source_impl::get_sensor_names(size_t chan)
+    {
+      return _dev->get_rx_sensor_names(chan);
+    }
+
+    ::uhd::sensor_value_t
+    usrp_source_impl::get_mboard_sensor(const std::string &name, size_t mboard)
+    {
+      return _dev->get_mboard_sensor(name, mboard);
+    }
+
+    std::vector<std::string>
+    usrp_source_impl::get_mboard_sensor_names(size_t mboard)
+    {
+      return _dev->get_mboard_sensor_names(mboard);
+    }
+
+    void
+    usrp_source_impl::set_clock_config(const ::uhd::clock_config_t &clock_config,
+                                       size_t mboard)
+    {
+      return _dev->set_clock_config(clock_config, mboard);
+    }
+
+    void
+    usrp_source_impl::set_time_source(const std::string &source,
+                                      const size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_REF_SOURCES_API
+      return _dev->set_time_source(source, mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    std::string
+    usrp_source_impl::get_time_source(const size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_REF_SOURCES_API
+      return _dev->get_time_source(mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    std::vector<std::string>
+    usrp_source_impl::get_time_sources(const size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_REF_SOURCES_API
+      return _dev->get_time_sources(mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    void
+    usrp_source_impl::set_clock_source(const std::string &source,
+                                       const size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_REF_SOURCES_API
+      return _dev->set_clock_source(source, mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    std::string
+    usrp_source_impl::get_clock_source(const size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_REF_SOURCES_API
+      return _dev->get_clock_source(mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    std::vector<std::string>
+    usrp_source_impl::get_clock_sources(const size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_REF_SOURCES_API
+      return _dev->get_clock_sources(mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    double
+    usrp_source_impl::get_clock_rate(size_t mboard)
+    {
+      return _dev->get_master_clock_rate(mboard);
+    }
+
+    void
+    usrp_source_impl::set_clock_rate(double rate, size_t mboard)
+    {
+      return _dev->set_master_clock_rate(rate, mboard);
+    }
+
+    ::uhd::time_spec_t
+    usrp_source_impl::get_time_now(size_t mboard)
+    {
+      return _dev->get_time_now(mboard);
+    }
+
+    ::uhd::time_spec_t
+    usrp_source_impl::get_time_last_pps(size_t mboard)
+    {
+      return _dev->get_time_last_pps(mboard);
+    }
+
+    void
+    usrp_source_impl::set_time_now(const ::uhd::time_spec_t &time_spec,
+                                   size_t mboard)
+    {
+      return _dev->set_time_now(time_spec, mboard);
+    }
+
+    void
+    usrp_source_impl::set_time_next_pps(const ::uhd::time_spec_t &time_spec)
+    {
+      return _dev->set_time_next_pps(time_spec);
+    }
+
+    void
+    usrp_source_impl::set_time_unknown_pps(const ::uhd::time_spec_t &time_spec)
+    {
+      return _dev->set_time_unknown_pps(time_spec);
+    }
+
+    void
+    usrp_source_impl::set_command_time(const ::uhd::time_spec_t &time_spec, size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_COMMAND_TIME_API
+      return _dev->set_command_time(time_spec, mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    void
+    usrp_source_impl::clear_command_time(size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_COMMAND_TIME_API
+      return _dev->clear_command_time(mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    ::uhd::usrp::dboard_iface::sptr
+    usrp_source_impl::get_dboard_iface(size_t chan)
+    {
+      return _dev->get_rx_dboard_iface(chan);
+    }
+
+    ::uhd::usrp::multi_usrp::sptr
+    usrp_source_impl::get_device(void)
+    {
+      return _dev;
+    }
+
+    void
+    usrp_source_impl::set_user_register(const uint8_t addr,
+                                        const uint32_t data,
+                                        size_t mboard)
+    {
+#ifdef UHD_USRP_MULTI_USRP_USER_REGS_API
+      _dev->set_user_register(addr, data, mboard);
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    void
+    usrp_source_impl::set_start_time(const ::uhd::time_spec_t &time)
+    {
+      _start_time = time;
+      _start_time_set = true;
+      _stream_now = false;
+    }
+
+    void
+    usrp_source_impl::issue_stream_cmd(const ::uhd::stream_cmd_t &cmd)
+    {
+      _dev->issue_stream_cmd(cmd);
+    }
+
+    bool
+    usrp_source_impl::start(void)
+    {
+#ifdef GR_UHD_USE_STREAM_API
+      _rx_stream = _dev->get_rx_stream(_stream_args);
+      _samps_per_packet = _rx_stream->get_max_num_samps();
+#endif
+      //setup a stream command that starts streaming slightly in the future
+      static const double reasonable_delay = 0.1; //order of magnitude over RTT
+      ::uhd::stream_cmd_t stream_cmd(::uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+      stream_cmd.stream_now = _stream_now;
+      if(_start_time_set) {
+        _start_time_set = false; //cleared for next run
+        stream_cmd.time_spec = _start_time;
+      }
+      else {
+        stream_cmd.time_spec = get_time_now() + ::uhd::time_spec_t(reasonable_delay);
+      }
+      _dev->issue_stream_cmd(stream_cmd);
+      _tag_now = true;
+      return true;
+    }
+
+    void
+    usrp_source_impl::flush(void)
+    {
+      const size_t nbytes = 4096;
+      gr_vector_void_star outputs;
+      std::vector<std::vector<char> > buffs(_nchan, std::vector<char>(nbytes));
+      for(size_t i = 0; i < _nchan; i++) {
+        outputs.push_back(&buffs[i].front());
+      }
+      while(true) {
+#ifdef GR_UHD_USE_STREAM_API
+        const size_t bpi = ::uhd::convert::get_bytes_per_item(_stream_args.cpu_format);
+        _rx_stream->recv(outputs, nbytes/bpi, _metadata, 0.0);
+#else
+        _dev->get_device()->recv
+          (outputs, nbytes/_type->size, _metadata, *_type,
+           ::uhd::device::RECV_MODE_FULL_BUFF, 0.0);
+#endif
+        if(_metadata.error_code == ::uhd::rx_metadata_t::ERROR_CODE_TIMEOUT)
+          break;
+      }
+    }
+
+    bool
+    usrp_source_impl::stop(void)
+    {
+      _dev->issue_stream_cmd(::uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+
+      this->flush();
+
+      return true;
+    }
+
+    std::vector<std::complex<float> >
+    usrp_source_impl::finite_acquisition(const size_t nsamps)
+    {
+      if(_nchan != 1)
+        throw std::runtime_error("finite_acquisition: usrp source has multiple channels, call finite_acquisition_v");
+      return finite_acquisition_v(nsamps).front();
+    }
+
+    std::vector<std::vector<std::complex<float> > >
+    usrp_source_impl::finite_acquisition_v(const size_t nsamps)
+    {
+#ifdef GR_UHD_USE_STREAM_API
+      //kludgy way to ensure rx streamer exsists
+      if(!_rx_stream) {
+        this->start();
+        this->stop();
+      }
+
+      //flush so there is no queued-up data
+      this->flush();
+
+      //create a multi-dimensional container to hold an array of sample buffers
+      std::vector<std::vector<std::complex<float> > >
+        samps(_nchan, std::vector<std::complex<float> >(nsamps));
+
+      //load the void* vector of buffer pointers
+      std::vector<void *> buffs(_nchan);
+      for(size_t i = 0; i < _nchan; i++) {
+        buffs[i] = &samps[i].front();
+      }
+
+      //tell the device to stream a finite amount
+      ::uhd::stream_cmd_t cmd(::uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
+      cmd.num_samps = nsamps;
+      cmd.stream_now = _stream_now;
+      static const double reasonable_delay = 0.1; //order of magnitude over RTT
+      cmd.time_spec = get_time_now() + ::uhd::time_spec_t(reasonable_delay);
+      _dev->issue_stream_cmd(cmd);
+
+      //receive samples until timeout
+      const size_t actual_num_samps = _rx_stream->recv
+        (buffs, nsamps, _metadata, 1.0);
+
+      //resize the resulting sample buffers
+      for(size_t i = 0; i < _nchan; i++) {
+        samps[i].resize(actual_num_samps);
+      }
+
+      return samps;
+#else
+      throw std::runtime_error("not implemented in this version");
+#endif
+    }
+
+    int
+    usrp_source_impl::work(int noutput_items,
+                           gr_vector_const_void_star &input_items,
+                           gr_vector_void_star &output_items)
+    {
+#ifdef GR_UHD_USE_STREAM_API
+      //In order to allow for low-latency:
+      //We receive all available packets without timeout.
+      //This call can timeout under regular operation...
+      size_t num_samps = _rx_stream->recv
+        (output_items, noutput_items, _metadata, 0.0);
+
+      //If receive resulted in a timeout condition:
+      //We now receive a single packet with a large timeout.
+      if(_metadata.error_code == ::uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) {
+        num_samps = _rx_stream->recv
+          (output_items, noutput_items, _metadata, 0.1, true/*one pkt*/);
+      }
+#else
+      size_t num_samps = _dev->get_device()->recv
+        (output_items, noutput_items, _metadata,
+         *_type, ::uhd::device::RECV_MODE_FULL_BUFF, 0.0);
+
+      if(_metadata.error_code == ::uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) {
+        num_samps = _dev->get_device()->recv
+          (output_items, noutput_items, _metadata, *_type,
+           ::uhd::device::RECV_MODE_ONE_PACKET, 1.0);
+      }
+#endif
+
+      //handle possible errors conditions
+      switch(_metadata.error_code) {
+      case ::uhd::rx_metadata_t::ERROR_CODE_NONE:
+        if(_tag_now) {
+          _tag_now = false;
+          //create a timestamp pmt for the first sample
+          const pmt::pmt_t val = pmt::make_tuple
+            (pmt::from_uint64(_metadata.time_spec.get_full_secs()),
+             pmt::from_double(_metadata.time_spec.get_frac_secs()));
+          //create a tag set for each channel
+          for(size_t i = 0; i < _nchan; i++) {
+            this->add_item_tag(i, nitems_written(0), TIME_KEY, val, _id);
+            this->add_item_tag(i, nitems_written(0), RATE_KEY,
+                               pmt::from_double(_samp_rate), _id);
+            this->add_item_tag(i, nitems_written(0), FREQ_KEY,
+                               pmt::from_double(_center_freq), _id);
+          }
+        }
+        break;
+
+      case ::uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
+        //its ok to timeout, perhaps the user is doing finite streaming
+        return 0;
+
+      case ::uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
+        _tag_now = true;
+        //ignore overflows and try work again
+        return work(noutput_items, input_items, output_items);
+
+      default:
+        std::cout << boost::format("UHD source block got error code 0x%x")
+          % _metadata.error_code << std::endl;
+        return num_samps;
+      }
+
+      return num_samps;
+    }
+
+  } /* namespace uhd */
+} /* namespace gr */