1 files changed, 166 insertions, 0 deletions
diff --git a/gr-uhd/lib/uhd_mimo_source.cc b/gr-uhd/lib/uhd_mimo_source.cc
new file mode 100644
index 0000000000..abd70ba369
--- /dev/null
+++ b/gr-uhd/lib/uhd_mimo_source.cc
@@ -0,0 +1,166 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2010 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 <uhd_mimo_source.h>
+#include <gr_io_signature.h>
+#include <stdexcept>
+//#include "utils.h"
+
+/***********************************************************************
+ * UHD Source
+ **********************************************************************/
+uhd_mimo_source::uhd_mimo_source(gr_io_signature_sptr sig)
+:gr_sync_block("uhd mimo source", gr_make_io_signature(0, 0, 0), sig){
+    /* NOP */
+}
+
+/***********************************************************************
+ * UHD Source Impl
+ **********************************************************************/
+class uhd_mimo_source_impl : public uhd_mimo_source{
+public:
+    uhd_mimo_source_impl(
+        size_t num_channels,
+        const std::string &args,
+        const uhd::io_type_t &type
+    ) : uhd_mimo_source(gr_make_io_signature(num_channels, num_channels, type.size)), _type(type)
+    {
+        _dev = uhd::usrp::mimo_usrp::make(args);
+        set_streaming(false);
+        _dev->set_time_unknown_pps(uhd::time_spec_t()); //TODO may want option to disable this
+    }
+
+    ~uhd_mimo_source_impl(void){
+        set_streaming(false);
+    }
+
+    void set_subdev_spec(size_t chan, const std::string &spec){
+        return _dev->set_rx_subdev_spec(chan, spec);
+    }
+
+    void set_samp_rate_all(double rate){
+        _dev->set_rx_rate_all(rate);
+        //do_samp_rate_error_message(rate, get_samp_rate_all(), "RX");
+    }
+
+    double get_samp_rate_all(void){
+        return _dev->get_rx_rate_all();
+    }
+
+    uhd::tune_result_t set_center_freq(size_t chan, double freq){
+        uhd::tune_result_t tr = _dev->set_rx_freq(chan, freq);
+        //do_tune_freq_error_message(freq, _dev->get_rx_freq(chan), "RX");
+        return tr;
+    }
+
+    uhd::freq_range_t get_freq_range(size_t chan){
+        return _dev->get_rx_freq_range(chan);
+    }
+
+    void set_gain(size_t chan, float gain){
+        return _dev->set_rx_gain(chan, gain);
+    }
+
+    float get_gain(size_t chan){
+        return _dev->get_rx_gain(chan);
+    }
+
+    uhd::gain_range_t get_gain_range(size_t chan){
+        return _dev->get_rx_gain_range(chan);
+    }
+
+    void set_antenna(size_t chan, const std::string &ant){
+        return _dev->set_rx_antenna(chan, ant);
+    }
+
+    std::string get_antenna(size_t chan){
+        return _dev->get_rx_antenna(chan);
+    }
+
+    std::vector<std::string> get_antennas(size_t chan){
+        return _dev->get_rx_antennas(chan);
+    }
+
+    uhd::time_spec_t get_time_now(void){
+        return _dev->get_time_now();
+    }
+
+    void set_time_next_pps(const uhd::time_spec_t &time_spec){
+        return _dev->set_time_next_pps(time_spec);
+    }
+
+    uhd::usrp::mimo_usrp::sptr get_device(void){
+        return _dev;
+    }
+
+/***********************************************************************
+ * Work
+ **********************************************************************/
+    int work(
+        int noutput_items,
+        gr_vector_const_void_star &input_items,
+        gr_vector_void_star &output_items
+    ){
+        //conditionally start streaming in the work call
+        //this prevents streaming before the runtime is ready
+        if (not _is_streaming) set_streaming(true);
+
+        uhd::rx_metadata_t metadata; //not passed out of this block
+
+        return _dev->get_device()->recv(
+            output_items, noutput_items, metadata,
+            _type, uhd::device::RECV_MODE_FULL_BUFF
+        );
+    }
+
+protected:
+    uhd::usrp::mimo_usrp::sptr _dev;
+    const uhd::io_type_t _type;
+    bool _is_streaming;
+
+    void set_streaming(bool enb){
+        if (enb){
+            //setup a stream command that starts streaming slightly in the future
+            static const double reasonable_delay = 0.01; //10 ms (order of magnitude >> RTT)
+            uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+            stream_cmd.stream_now = false;
+            stream_cmd.time_spec = get_time_now() + uhd::time_spec_t(_dev->get_num_channels() * reasonable_delay);
+            _dev->issue_stream_cmd(stream_cmd);
+        }
+        else
+            _dev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+        _is_streaming = enb;
+    }
+};
+
+/***********************************************************************
+ * Make UHD Source
+ **********************************************************************/
+boost::shared_ptr<uhd_mimo_source> uhd_make_mimo_source(
+    size_t num_channels,
+    const std::string &args,
+    const uhd::io_type_t::tid_t &type
+){
+    return boost::shared_ptr<uhd_mimo_source>(
+        new uhd_mimo_source_impl(num_channels, args, type)
+    );
+}