errors on PYNQ Overlay

[lloo099]

生成.bit和.tcl调用Overlay后报错：

ValueError Traceback (most recent call last)
in ()
3 # Load overlay and IP
4 #=================================================
----> 5 overlay = Overlay("yolov2.bit")
6 get_ipython().magic('pinfo overlay')

/usr/local/lib/python3.6/dist-packages/pynq/overlay.py in init(self, bitfile_name, dtbo, download, ignore_version, device)
339 self._register_drivers()
340
--> 341 self.parser = self.device.get_bitfile_metadata(self.bitfile_name)
342
343 self.ip_dict = self.gpio_dict = self.interrupt_controllers = \

/usr/local/lib/python3.6/dist-packages/pynq/pl_server/device.py in get_bitfile_metadata(self, bitfile_name)
780 else:
781 raise ValueError("Cannot find HWH file for {}.".format(
--> 782 bitfile_name))

ValueError: Cannot find HWH file for /home/xilinx/jupyter_notebooks/yolo_test/yolov2.bit.

[qing-2]

According to current regulations，we need to use ".bit and .hwh" instead of ".bit and .tcl".
You can generated .bit and .hwh using the author's code and ".hwh" will be automatically generated with ".bit".

".hwh" file does't need to be added in python.
only use overlay = Overlay("yolov2.bit") ,and the .hwh file with the same name will be recognized automatically.
Of course, if there are no .hwh in the same directory at this time, an error will be reported like you showed.