A driver for XP-PEN G430S_B (black) tablet

[Sturwandan]

This driver works with my tablet with one problem:
The tablet only works until it's reconnected, then driver needs to be reinserted for the tablet to work again.

I wasn't able to pinpoint this problem yet. However simpler driver from #388 does not have such a problem.

[Sturwandan]

I have forgotten to add patch to all other files. I don't know how to make github accept a patch file.
#388 (comment)
However this patch is trivial and same for simple and advanced version of the driver.

[alfazaz]

I found your work and it's interesting... I'm trying also to make another XP PEN tablet to work here (without success... init is ok, usbhid-dump is ok but no events are detected by evtest :-( ) :
#351

I based my (not working) work on the following link. It's another XP PEN Artist Pull Request which is not structured like your Pull Request :
#291

May be it can inspire you (on reconnect problem or other things ?) even if I can't get it work for my XP PEN tablet model.

[Sturwandan]

@alfazaz, please check the last comment in my bug report ( #388 ), which I have just added, I have had the same problem. The reason was that when tablet is in native mode (after I sent init), the events are emitted from interface 2 (starting from 0), rather than from interface 1 (which they are sent from in default mode). I have spent quite some time trying to debug it, until I got a suggestion to make sure I am using the correct interface.

[alfazaz]

Thanks @Sturwandan . I answered in #388 .