On Mar 11, 2010, at 6:32 PM, Christopher Boger wrote:
I have a device with multiple Report IDs. Each of the Report IDs is
associated with the same Usage Page and Usage number. So, basically
I have one path. How exactly do I select the Report ID? It looks
like when I write a report using the path, it shows a report ID in
the TRACE printout, but basically it’s choosing the first report ID
that matches this path. How do I select others? Is this a limitation
of libhid? Or, am I not getting something?
Ah, I see what happened. libhid has a bug in which the Usages for
ranges are not printed properly.
[I think I accidentally dropped that message, but the list has a limit
of 40KB including attachments. I would recommend against sending HTML,
as it tends to hit that limit quickly.]
Here's an excerpt of the dump you sent:
parse tree of HIDInterface 002/037[2]:
path: 0xff000001.0xff000001; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0xff000001; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
path: 0xff000001.0x00000000; type: 0x80
If a path ends in 0x00000000, it is probably being printed
incorrectly. There is a script in SVN which decodes a hex dump of the
HID report descriptor. Not sure if I have described how that script
works on the list, but if you have trouble, send the descriptor hex
dump from the test_libhid program.
_______________________________________________
libhid-discuss mailing list
[email protected]
http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss
http://libhid.alioth.debian.org/
