我执行擦除nand,报错下图:
SystemExit: No backend availableException ignored in: <function XUsbComList.__del__ at 0x000002602FAD0400>Traceback (most recent call last):
File "C:\Users\pwhsu0\Desktop\MA35D1\xusbcom.py", line 209, in __del__
AttributeError: 'XUsbComList' object has no attribute 'devices'