On Wed, Mar 8, 2017 at 9:22 PM, Greg Horler <dr.g.d.hor...@gmail.com> wrote: > Xiaofan, > > I have removed all devices filters using the libusb-win32.exe tool and I > have not had a crash....yet. > > What is/was the purpose of the filter? A lay-man's answer would be good > please.
For Windows driver it is rather complicated and no layman answer will probably be available. In general, you need to have a supported driver in order to use libusb-1.0 Windows and libusb-win32. Most of the cases you will need to switch the driver from original vendor driver to the support driver. libusb-win32 library (libusb0.dll): either libusb0.sys (device driver or filter driver) or libusbk.sys libusb-1.0 Windows library (libusb-1.0.dll): either WinUSB.sys or libusbK.sys (libusb0.sys is not working well, do not use it) or HID or usbdk. The filter driver is to enable libusb-win32 library (libusb0.dll) to be used without replacing the existing vendor driver. The current version of libusb-win32 device filter is in general safe to use. It is just it may not work with some device. But it may not work with some device (eg: those using UMDF driver). usbdk may be a potential replacement for libusb-win32 filter driver. In general, libusb-win32 is no longer recommended to be used for new development. It is recommended to switch to libusb (libusb-1.0 API). Ref: https://github.com/libusb/libusb/wiki/Windows https://github.com/libusb/libusb/wiki/FAQ https://sourceforge.net/p/libusb-win32/wiki/Home/ -- Xiaofan ------------------------------------------------------------------------------ Announcing the Oxford Dictionaries API! The API offers world-renowned dictionary content that is easy and intuitive to access. Sign up for an account today to start using our lexical data to power your apps and projects. Get started today and enter our developer competition. http://sdm.link/oxford _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
