Small Osmosdr fixes. Still unsatisfactory w/HackRF Jawbreaker. DC block

unhelpful.

apps/modes_gui

@@ -59,7 +59,8 @@ class mainwindow(QtGui.QMainWindow):
         if defaults["pmf"] is not None:
             self.ui.check_pmf.setChecked(bool(defaults["pmf"]))
         if defaults["samplerate"] is not None:
-            self.ui.combo_rate.setCurrentIndex(self.rates.index(int(defaults["samplerate"])))
+            if defaults["samplerate"] in self.rates:
+                self.ui.combo_rate.setCurrentIndex(self.rates.index(int(defaults["samplerate"])))
 
         self.ui.prog_rssi.setMinimum(0)
         self.ui.prog_rssi.setMaximum(40)
@@ -140,6 +141,7 @@ class mainwindow(QtGui.QMainWindow):
         #hook up parameter-changed signals so we can change gain, rate, etc. while running
         self.ui.combo_rate.currentIndexChanged['QString'].connect(self.update_sample_rate)
         self.ui.line_gain.editingFinished.connect(self.update_gain)
+        self.ui.combo_source.currentIndexChanged['QString'].connect(self.populate_source_options)
 
         #hook up live data text box update signal
         self.live_data_changed_signal.connect(self.on_append_live_data)
@@ -228,7 +230,7 @@ class mainwindow(QtGui.QMainWindow):
         elif sourceid == "Osmocom":
             try:
                 import osmosdr
-                self.src = osmosdr.source_c("")
+                self.src = osmosdr.source("")
                 self.rates = [rate.start() for rate in self.src.get_sample_rates() if (rate.start() % 2.e6) == 0]
                 self.antennas = ["RX"]
                 self.src = None
@@ -258,11 +260,12 @@ class mainwindow(QtGui.QMainWindow):
         self.ui.combo_ant.addItems(self.antennas)
 
         #set up recommended sample rate
-        recommended_rate = min(x for x in self.rates if x >= 4e6 and
+        if len(self.rates) > 1:
-                             max(self.rates) % x == 0)
+            recommended_rate = min(x for x in self.rates if x >= 4e6 and
-        if recommended_rate >= 8.e6:
+                                 max(self.rates) % x == 0)
-            self.ui.check_pmf.setChecked(True)
+            if recommended_rate >= 8.e6:
-        self.ui.combo_rate.setCurrentIndex(self.rates.index(recommended_rate))
+                self.ui.check_pmf.setChecked(True)
+            self.ui.combo_rate.setCurrentIndex(self.rates.index(recommended_rate))
 
 ################ action handlers ####################
     def on_combo_source_currentIndexChanged(self, index):

python/radio.py

@@ -102,7 +102,7 @@ class modes_radio (gr.top_block, pubsub):
     #RX path args
     group.add_option("-r", "--rate", type="eng_float", default=4e6,
                       help="set sample rate [default=%default]")
-    group.add_option("-T", "--threshold", type="eng_float", default=5.0,
+    group.add_option("-T", "--threshold", type="eng_float", default=7.0,
                       help="set pulse detection threshold above noise in dB [default=%default]")
     group.add_option("-p","--pmf", action="store_true", default=False,
                       help="Use pulse matched filtering [default=%default]")
@@ -119,7 +119,6 @@ class modes_radio (gr.top_block, pubsub):
     if self.live_source():
         self._u.set_gain(gain)
         print "Gain is %f" % self.get_gain()
-
     return self.get_gain()
 
   def set_rate(self, rate):
@@ -176,7 +175,7 @@ class modes_radio (gr.top_block, pubsub):
     #osmocom doesn't have gain bucket distribution like UHD does
     elif options.source == "osmocom": #RTLSDR dongle or HackRF Jawbreaker
         import osmosdr
-        self._u = osmosdr.source_c(options.args)
+        self._u = osmosdr.source(options.args)
 #        self._u.set_sample_rate(3.2e6) #fixed for RTL dongles
         self._u.set_sample_rate(options.rate)
         if not self._u.set_center_freq(options.freq):
@@ -188,7 +187,7 @@ class modes_radio (gr.top_block, pubsub):
 ###DO NOT COMMIT
         self._u.set_gain(14, "RF", 0)
         self._u.set_gain(40, "IF", 0)
-        #self._u.set_gain(14, "BB", 0)
+        self._u.set_gain(6, "BB", 0)
 ###DO NOT COMMIT
 #        self._u.set_gain(options.gain)
         print "Gain is %i" % self._u.get_gain()
@@ -214,3 +213,4 @@ class modes_radio (gr.top_block, pubsub):
 
   def close(self):
     self._sender.close()
+    self._u = None

python/rx_path.py

@@ -19,7 +19,7 @@
 # Boston, MA 02110-1301, USA.
 # 
 
-from gnuradio import gr, blocks
+from gnuradio import gr, blocks, filter
 import air_modes_swig
 
 class rx_path(gr.hier_block2):
@@ -36,6 +36,7 @@ class rx_path(gr.hier_block2):
 
         # Convert incoming I/Q baseband to amplitude
         self._demod = blocks.complex_to_mag_squared()
+#        self._dcblock = filter.dc_blocker_ff(128, False)
         self._bb = self._demod
 
         # Pulse matched filter for 0.5us pulses
@@ -54,7 +55,7 @@ class rx_path(gr.hier_block2):
         self._slicer = air_modes_swig.slicer(self._queue)
 
         # Wire up the flowgraph
-        self.connect(self, self._demod)
+        self.connect(self, self._demod)#, self._dcblock)
         self.connect(self._bb, (self._sync, 0))
         self.connect(self._bb, self._avg, (self._sync, 1))
         self.connect(self._sync, self._slicer)