px_loader: added --force option

this can be used to override the board type check. Useful when
changing bootloaders

Tools/px_uploader.py

@@ -416,7 +416,12 @@ class uploader(object):
         def upload(self, fw):
                 # Make sure we are doing the right thing
                 if self.board_type != fw.property('board_id'):
-                        raise IOError("Firmware not suitable for this board")
+                        msg = "Firmware not suitable for this board (board_type=%u board_id=%u)" % (
+                                self.board_type, fw.property('board_id'))
+                        if args.force:
+                                print("WARNING: %s" % msg)
+                        else:
+                                raise IOError(msg)
                 if self.fw_maxsize < fw.property('image_size'):
                         raise RuntimeError("Firmware image is too large for this board")
 
@@ -486,6 +491,7 @@ else:
 parser = argparse.ArgumentParser(description="Firmware uploader for the PX autopilot system.")
 parser.add_argument('--port', action="store", required=True, help="Serial port(s) to which the FMU may be attached")
 parser.add_argument('--baud', action="store", type=int, default=115200, help="Baud rate of the serial port (default is 115200), only required for true serial ports.")
+parser.add_argument('--force', action='store_true', default=False, help='Override board type check and continue loading')
 parser.add_argument('firmware', action="store", help="Firmware file to be uploaded")
 args = parser.parse_args()