bladeRF: set feature added to device string

A bladeRF feature can now be assigned using the device string.

Ex: "bladerf=0,feature=oversample"

Author: rthomp10

lib/bladerf/bladerf_common.cc

@@ -313,6 +313,28 @@ void bladerf_common::init(dict_t const &dict, bladerf_direction direction)
     _stream_timeout = boost::lexical_cast<unsigned int>(_get(dict, "stream_timeout_ms"));
   }
 
+  /* Set feature */
+  if (dict.count("feature")) {
+    if (_get(dict, "feature") == "oversample") {
+        _feature = BLADERF_FEATURE_OVERSAMPLE;
+    } else if (_get(dict, "feature") == "default") {
+        _feature = BLADERF_FEATURE_DEFAULT;
+    } else {
+        BLADERF_THROW("Specified feature invalid. Valid formats: [default|oversample]");
+    }
+  } else {
+    _feature = BLADERF_FEATURE_DEFAULT;
+    BLADERF_DEBUG( "Feature not provided. Feature left on DEFAULT");
+  }
+
+  status = bladerf_set_feature(_dev.get(), _feature);
+  if (status != 0) {
+    BLADERF_THROW_STATUS(status, "Unabled to set feature");
+  } else {
+    std::string feature_text = (_feature == BLADERF_FEATURE_OVERSAMPLE) ? "OVERSAMPLE" : "DEFAULT";
+    BLADERF_INFO(feature_text + " feature enabled");
+  }
+
   /* Explicately set sample_format */
   if (dict.count("sample_format")) {
     if (_get(dict, "sample_format") == "16" || _get(dict, "sample_format") == "16bit") {

lib/bladerf/bladerf_common.h

@@ -252,6 +252,7 @@ class bladerf_common
   size_t _num_transfers;        /**< number of active backend transfers */
   unsigned int _stream_timeout; /**< timeout for backend transfers */
 
+  bladerf_feature _feature;     /**< feature assigned to board */
   bladerf_format _format;       /**< sample format to use */
 
   bladerf_channel_map _chanmap; /**< map of antennas to channels */

lib/bladerf/bladerf_source_c.cc

@@ -230,6 +230,11 @@ bool bladerf_source_c::start()
 
   gr::thread::scoped_lock guard(d_mutex);
 
+  status = bladerf_set_feature(_dev.get(), _feature);
+  if (status != 0) {
+    BLADERF_THROW_STATUS(status, "bladeRF set_feature failed");
+  }
+
   status = bladerf_sync_config(_dev.get(), _layout, _format, _num_buffers,
                                _samples_per_buffer, _num_transfers,
                                _stream_timeout);