[libhid-discuss] simple output

[Charles Lepple]

On Feb 13, 2009, at 1:27 PM, Ael Gain wrote:

> I'm not sure about what is the debug output but I'll paste this:

That's what I am referring to.

>  parse tree of HIDInterface 004/004[0]:
>   path: 0xffa00001.0xffa00003; type: 0x80

This means you have one byte at path { 0xffa00001, 0xffa00003 }  
(input)...

>   path: 0xffa00001.0xffa00004; type: 0x90

... one byte of output at { 0xffa00001, 0xffa00004 } ...

>   path: 0xffa00001.0xffa00005; type: 0xb0
>   path: 0xffa00001.0x00000000; type: 0xb0

and two feature bytes at { 0xffa00001, 0xffa00005 } (which can be  
either input or output).

It sounds like you were trying to send two bytes to an output that  
only expects one byte.

> and this, when i try my program:
>
> TRACE: hid_prepare_parser(): setting up the HID parser for USB device
> 004/003[0]...
>   TRACE: hid_reset_parser(): resetting the HID parser for USB device
> 004/003[0]...
>   TRACE: hid_prepare_parser(): dumping the raw report descriptor
>   TRACE: hid_prepare_parser(): 0x000: 0x06 0xa0 0xff 0x09 0x01 0xa1  
> 0x01
> 0x09
>   TRACE: hid_prepare_parser(): 0x008: 0x03 0x15 0x00 0x26 0x00 0xff  
> 0x75
> 0x08
>   TRACE: hid_prepare_parser(): 0x010: 0x95 0x01 0x81 0x02 0x09 0x04  
> 0x15
> 0x00
>   TRACE: hid_prepare_parser(): 0x018: 0x26 0x00 0xff 0x75 0x08 0x95  
> 0x01
> 0x91
>   TRACE: hid_prepare_parser(): 0x020: 0x02 0x09 0x05 0x15 0x00 0x26  
> 0x00
> 0xff
>   TRACE: hid_prepare_parser(): 0x028: 0x75 0x08 0x95 0x02 0xb1 0x02  
> 0xc0
>   TRACE: hid_prepare_parser(): parsing the HID tree of USB device
> 004/003[0]...
>  NOTICE: hid_prepare_parser(): successfully set up the HID parser  
> for USB
> device 004/003[0].
>
> Thank you for your help,
> cloud
>
> ----- Original Message -----
> From: "Charles Lepple" <clepple at ghz.cc>
> To: "Ael Gain" <ael.gain at free.fr>
> Cc: "libhid-discuss List" <libhid-discuss at lists.alioth.debian.org>
> Sent: Thursday, February 12, 2009 4:23 AM
> Subject: Re: [libhid-discuss] simple output
>
>
>> On Feb 11, 2009, at 1:02 PM, Ael Gain wrote:
>>
>>> Is my path allright ? Do you see any (many? :-) ) things wrong  
>>> in  my
>>> code ? I'm a bit lost in HID programming...
>>
>> The easiest way to tell is from the debug output.
>>
>> -- 
>> Charles Lepple
>>
>>
>>
>
>
> _______________________________________________
> libhid-discuss mailing list
> libhid-discuss at lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss
> http://libhid.alioth.debian.org/