pylibftdi, libusb-1.0.dll, windows 7

[tigner]

Hi ,

This works on *nix,and works on *some* windows 7 machines...

Microsoft Windows [Version 6.1.7601]
Copyright © 2009 Microsoft Corporation. All rights reserved.

C:\Users\MSU>python
Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> ^Z


C:\Users\MSU>cd mypython
C:\Users\MSU\MyPython>python
Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pylibftdi
>>> from pylibftdi import BitBangDevice
>>> bb = BitBangDevice()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\pylibftdi\bitbang.py", line 60, in __init_
_
self.open()
File "C:\Python27\lib\site-packages\pylibftdi\bitbang.py", line 66, in open
super(BitBangDevice, self).open()
File "C:\Python27\lib\site-packages\pylibftdi\device.py", line 163, in open
self.driver._libusb.libusb_set_auto_detach_kernel_driver(dev, 1)
File "C:\Python27\lib\ctypes\__init__.py", line 375, in __getattr__
func = self.__getitem__(name)
File "C:\Python27\lib\ctypes\__init__.py", line 380, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: function 'libusb_set_auto_detach_kernel_driver' not found
>>>

The directory contains and needed .dll files, and this code should work everytime.
On some win7 machines it works, others just give errors. I have installed the
same version of Python2.7 everytime. I use Zadig to change the 232hm ftdi device
driver to the recommended libusbk version.

This is weird, on some Win7 machines it works, on others it has the above error.
All installations are identical win7 64bit installs with sp1 installed.

Any help is greatly appreciated.

Thank you,

tigner