3 files changed, 17 insertions, 11 deletions
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py b/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py
index 6daa4e7a2a..82d1eca13a 100644
--- a/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py
@@ -121,15 +121,6 @@ class _generic_usrp_base(object):
     def set_auto_tr(self, enable):
         if self._type == USRP1_TYPE: return self._subdev.set_auto_tr(enable)
 
-    def __del__(self):
-        #delete usrp1 specific subdev
-        if self._type == USRP1_TYPE:
-            del self._subdev
-            self._subdev = None
-        #delete the usrp device
-        del self._u
-        self._u = None
-
 ########################################################################
 # generic usrp source
 ########################################################################
diff --git a/gr-utils/src/python/usrp_siggen.py b/gr-utils/src/python/usrp_siggen.py
index 69925fd0ef..da83da770d 100755
--- a/gr-utils/src/python/usrp_siggen.py
+++ b/gr-utils/src/python/usrp_siggen.py
@@ -305,7 +305,7 @@ def get_options():
     return (options, args)
 
 # If this script is executed, the following runs. If it is imported, the below does not run.
-if __name__ == "__main__":
+def main():
     if gr.enable_realtime_scheduling() != gr.RT_OK:
         print "Note: failed to enable realtime scheduling, continuing"
     
@@ -321,3 +321,11 @@ if __name__ == "__main__":
     tb.start()
     raw_input('Press Enter to quit: ')
     tb.stop()
+    tb.wait()
+
+# Make sure to create the top block (tb) within a function:
+# That code in main will allow tb to go out of scope on return,
+# which will call the decontructor on usrp and stop transmit.
+# Whats odd is that grc works fine with tb in the __main__,
+# perhaps its because the try/except clauses around tb.
+if __name__ == "__main__": main()
diff --git a/gr-utils/src/python/usrp_siggen_gui.py b/gr-utils/src/python/usrp_siggen_gui.py
index 40848fbeee..47d47bdb3d 100755
--- a/gr-utils/src/python/usrp_siggen_gui.py
+++ b/gr-utils/src/python/usrp_siggen_gui.py
@@ -284,7 +284,7 @@ class app_gui(pubsub):
         self.vbox.AddSpacer(5)
         self.vbox.AddStretchSpacer()
 
-if __name__ == "__main__":
+def main():
     try:
         # Get command line parameters
         (options, args) = usrp_siggen.get_options()
@@ -308,3 +308,10 @@ if __name__ == "__main__":
     except RuntimeError, e:
         print e
         sys.exit(1)
+
+# Make sure to create the top block (tb) within a function:
+# That code in main will allow tb to go out of scope on return,
+# which will call the decontructor on usrp and stop transmit.
+# Whats odd is that grc works fine with tb in the __main__,
+# perhaps its because the try/except clauses around tb.
+if __name__ == "__main__": main()