assert (conn.cabinet == conn.frame == 0)

spinnman/transceiver.py

@@ -288,7 +288,9 @@ def __identify_connections(self, connections):
             # Locate any connections that talk to a BMP
             if isinstance(conn, BMPConnection):
                 # If it is a BMP conn, add it here
+                assert (len(self._bmp_connections) == 0)
                 self._bmp_connections.append(conn)
+                assert (conn.cabinet == conn.frame == 0)
                 self._bmp_connection_selectors[conn.cabinet, conn.frame] =\
                     FixedConnectionSelector(conn)
             # Otherwise, check if it can send and receive SCP (talk to SCAMP)
@@ -307,7 +309,7 @@ def __check_bmp_connections(self):
         # check that the UDP BMP conn is actually connected to a BMP
         # via the sver command
         for conn in self._bmp_connections:
-
+            assert (conn.cabinet == conn.frame == 0)
             # try to send a BMP sver to check if it responds as expected
             try:
                 version_info = self._get_scamp_version(
@@ -1107,6 +1109,7 @@ def _bmp_connection(self, cabinet, frame):
         :param int frame:
         :rtype: FixedConnectionSelector
         """
+        assert (cabinet == frame == 0)
         key = (cabinet, frame)
         if key not in self._bmp_connection_selectors:
             raise SpinnmanInvalidParameterException(