Re: [Libusb-win32-devel] libusb-win32 SVN version and HID backend

[Stephan M. <ste...@we...>]

> 
> On 6/25/07, Stephan Meyer <ste...@we...> wrote:
> >
> > The current version (0.1.12.1) works without any problems
> > on vista-32bit but NOT on vista-64bit.
> > Furture versions of the DLL will use vista's built-in winusb.sys
> > driver and will therefore work on both platforms. If you're
> > interrested in a pre-pre-alpha version then grab the latest sources
> > from the SVN and try it out.
> > http://libusb-win32.svn.sourceforge.net/viewvc/libusb-win32/trunk/libusb1/
> >
> > Stephan
> >
> 
> Nice to see that the new version will have three backend (libusb-win32,
> HID and winusb).
> 
> I built the new version with MinGW and it seems to run fine. I have two HID
> device attached, a PICkit 2 USB programmer from Microchip and a Microsoft
> Baisc Optical Mouse. Using the default system HID driver, I can still run the
> test program. Can I assume that the HID backend is kind of working now?
> 

It's only working partially. The backend is fully coded but has not been tested
very much and I don't know if real data transfers actually work.
What's still missing are more unit-tests (see tests/src folder) and a test firmware
that's 100% compliant with the HID spec (see tests/firmware folder).
It would be really nice if someone with good HID expertise would contribute
to this backend.

> PICkit 2 does have two configurations, now it only display the first. Is this
> normal?

Yes that's normal. The descriptors you see when using Windows' HID driver
are not read from the device (Windows doesn't provide any API for this). 
These descriptors are instead generated by the HID backend based on the
information provided by Windows' HID API. Have a look at the source code
and see how it works. The backend assumes that every HID device has only
one configuration, one interface, and 1-2 interrupt endpoints.

> 
> And if I want to try out a libusb based program ported from Linux, how do I
> use the HID backend (without using the device driver)?

You can just use the libusb API as if the HID would be a 'normal' libusb
based device. 

> 
> By the way, I am using Windows XP SP2.
> 
> XFCHEN@APSGSGPXFCHEN /c/Myprog/libusb-win32/libusb1
> $ ./testlibusb.exe -v
> Dev #3: Microchip Technology Inc. - PICkit 2 Microcontroller Programmer
>   - Serial Number: PIC18F2550
>   wTotalLength:         41
>   bNumInterfaces:       1
>   bConfigurationValue:  1
>   iConfiguration:       0
>   bmAttributes:         80h
>   MaxPower:             50
>     bInterfaceNumber:   0
>     bAlternateSetting:  0
>     bNumEndpoints:      2
>     bInterfaceClass:    3
>     bInterfaceSubClass: 0
>     bInterfaceProtocol: 0
>     iInterface:         0
>       bEndpointAddress: 81h
>       bmAttributes:     03h
>       wMaxPacketSize:   64
>       bInterval:        10
>       bRefresh:         0
>       bSynchAddress:    0
>       bEndpointAddress: 02h
>       bmAttributes:     03h
>       wMaxPacketSize:   64
>       bInterval:        10
>       bRefresh:         0
>       bSynchAddress:    0
> Dev #2: Microsoft - Basic Optical Mouse
>   wTotalLength:         34
>   bNumInterfaces:       1
>   bConfigurationValue:  1
>   iConfiguration:       0
>   bmAttributes:         80h
>   MaxPower:             50
>     bInterfaceNumber:   0
>     bAlternateSetting:  0
>     bNumEndpoints:      1
>     bInterfaceClass:    3
>     bInterfaceSubClass: 0
>     bInterfaceProtocol: 0
>     iInterface:         0
>       bEndpointAddress: 81h
>       bmAttributes:     03h
>       wMaxPacketSize:   4
>       bInterval:        10
>       bRefresh:         0
>       bSynchAddress:    0
> 
> XFCHEN@APSGSGPXFCHEN /c/Myprog/pickit/pk2-3.00-alpha10
> $ ./pk2.exe -on
> 
> Fatal error> Could not find PICkit2 programmer--
> you might try lsusb to see if it's actually there.
> 
> 
> PK2 version 3.00 alpha 10 - 2007/06/10
>  c:\Myprog\pickit\pk2-3.00-alpha10\pk2.exe -on
> 
> Locating USB Microchip PICkit2 (vendor 0x04d8/product 0x0033)
> found 5 busses
> 
> Regards,
> Xiaofan
> 
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