Re: [pyusb-users] Finally found: the installed library

[Jeffrey N. <jsn...@su...>]

Don't forget to indicate in the documentation that not knowing which 
driver to use is a VERY unusual situation, and that anyone going down 
that path will need to install both libusb DLLs in the application's PATH.

Jeff

On 10/11/2016 6:03 AM, Wander Lairson Costa wrote:
> Hi Hermann,
>
> Thanks for digging on this. I didn't have free time to update docs 
> yet, but will do.
>
> 2016-10-11 6:27 GMT-03:00 Hermann Hamann <her...@we... 
> <mailto:her...@we...>>:
>
>     Hi,
>     The use of the pyusb0 service is a bit troublesome, because you
>     have to specify the desired library by hand.
>     I always had the dream of automatically use the installed library.
>     Well, here is how.
>     You must know the Vid and Pid of your device. With that you can
>     look up the registry for the installed service.
>     If it is winusb you need not care.
>     If it is pyusb0 then you get the device descriptor and extract the
>     device name.
>     With it you go to the driverstore and scan the filerepository
>     directory for a directory file name
>     that starts with the device name.
>     Then you walk under this tree until you find a dll name.
>     This is the installed library.
>     Was not so hard.
>     I want to thank Xiaofan for his encouraging advice to dig deeper
>     in this registry thingens.
>     Now there is no more any need to pick a wrong library.
>
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> -- 
> Best Regards,
> Wander Lairson Costa
>
>
>
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