1 files changed, 111 insertions, 0 deletions
diff --git a/gr-uhd/lib/uhd_simple_source.cc b/gr-uhd/lib/uhd_simple_source.cc
new file mode 100644
index 000000000..85e7f8f37
--- /dev/null
+++ b/gr-uhd/lib/uhd_simple_source.cc
@@ -0,0 +1,111 @@
+/* -*- 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_simple_source.h>
+#include <gr_io_signature.h>
+#include <stdexcept>
+#include "utils.h"
+
+/***********************************************************************
+ * Make UHD Source
+ **********************************************************************/
+boost::shared_ptr<uhd_simple_source> uhd_make_simple_source(
+    const std::string &args,
+    const uhd::io_type_t::tid_t &type
+){
+    return boost::shared_ptr<uhd_simple_source>(
+        new uhd_simple_source(args, type)
+    );
+}
+
+/***********************************************************************
+ * UHD Source
+ **********************************************************************/
+uhd_simple_source::uhd_simple_source(
+    const std::string &args,
+    const uhd::io_type_t &type
+) : gr_sync_block(
+    "uhd source",
+    gr_make_io_signature(0, 0, 0),
+    gr_make_io_signature(1, 1, type.size)
+), _type(type){
+    _dev = uhd::usrp::simple_usrp::make(args);
+
+    set_streaming(false);
+}
+
+uhd_simple_source::~uhd_simple_source(void){
+    set_streaming(false);
+}
+
+void uhd_simple_source::set_streaming(bool enb){
+    if (enb)
+        _dev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+    else
+        _dev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+    _is_streaming = enb;
+}
+
+void uhd_simple_source::set_samp_rate(double rate){
+    return _dev->set_rx_rate(rate);
+}
+
+double uhd_simple_source::get_samp_rate(void){
+    return _dev->get_rx_rate();
+}
+
+uhd::tune_result_t uhd_simple_source::set_center_freq(double freq){
+    return _dev->set_rx_freq(freq);
+}
+
+/***********************************************************************
+ * Work
+ **********************************************************************/
+int uhd_simple_source::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);
+
+    size_t total_items_read = 0;
+    uhd::rx_metadata_t metadata;
+
+    //call until the output items are all filled
+    //or an exit condition below is encountered
+    while(total_items_read < size_t(noutput_items)){
+        size_t items_read = _dev->get_device()->recv(
+            boost::asio::buffer(
+                (uint8_t *)output_items[0]+(total_items_read*_type.size),
+                (noutput_items-total_items_read)*_type.size
+            ), metadata, _type
+        );
+        total_items_read += items_read;
+
+        //we timed out, get out of here
+        if (items_read == 0) break;
+    }
+
+    return total_items_read;
+}