On Mon, Mar 5, 2018 at 3:51 AM, Michael Hennebry <michael.henne...@rivieranexus.com> wrote: > I might end up using pyserial. > It can find the VID/PID of CDC virtual serial ports. > > That said, I'd still like to be able to use pyusb. > > At the suggestion of a colleague, > I used zadig to get avrdude to work, > Didn't really know what I was doing. > Just followed directions. > At one time, I had avrdude and Atmel Studio working, > but I do not know what I did. > > My effort to get pyusb to work seems to have damaged AS7. > It can no longer use the Atmel ICE.
Because Atmel ICE needs to use vendor driver whereas avrdude uses libusb-win32 or libusb-1.0 supported driver. In order to use Atmel Studio and avrdude, you may have to switch driver between the two. Or try usbdk. > libusb-1.0 is a dll that applications, e.g. python can open? > WinUSB, libusbK.sys, usbk and generic HID are used by the OS? > >> But if you really want to try, you can try libusb usbdk backend, >> which may work with your CDC device. It acts as a filter driver. > > usbdk is a dll that applications, e.g. python can open? No. usbdk.sys/WinUSB.sys/libusbK.sys are Windows kernel drivers that Windows OS needs to have to access your device. That is low level stuff. To make it more complicated, usbdk/winusb/libusbk also have associated user space library (DLL) to let you access the device. libusb-1.0.dll is the user space library on top of the usbdk/winusb/libusbk for you to easy access the device. pyusb can use libusb-1.0 backend through libusb-1.0 library. Under Windows, libusb-1.0.dll is the file name for the library. > https://github.com/libusb/libusb/wiki/Windows#How_to_use_libusb_on_Windows: >> HID keyboards and mice cannot be accessed using the native HID driver as >> Windows reserves exclusive access to them. > > No user application can see either HID mice or HID keyboards as > USB things? > Presumably an application can see the keyboard as a file it can open. > What can see a mouse? As what? There are APIs for mouse/keyboard, like Direct Input. There are on the high level than USB. They support USB/Bluetooth etc. > Thank you for your attention. > I hope it doesn't seem too much like irrigating a rock. > Windows driver is a complicated world... -- Xiaofan ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
