[libhid-discuss] hid_get_input_report(): failed to retrieve report Path wrong?

[Charles Lepple]

[please subscribe to the list: http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss 
]

On Sep 2, 2009, at 11:26 PM, William Good wrote:

>                      Item(Local ): Usage Minimum, data= [ 0x01 ] 1
>                                              Button 1 (Primary)
>                      Item(Local ): Usage Maximum, data= [ 0x18 ] 24
>                                             (null)
>                      Item(Global): Logical Minimum, data= [ 0x00 ] 0
>                      Item(Global): Logical Maximum, data= [ 0x01 ] 1
>                      Item(Global): Report Size, data= [ 0x01 ] 1
>                      Item(Global): Report Count, data= [ 0x18 ] 24
>                      Item(Main ): Input, data= [ 0x02 ] 2
>                                            Data Variable Absolute  
> No_Wrap Linear
>                                            Preferred_State  
> No_Null_Position Non_Volatile Bitfield

I am not too familiar with game controllers, but I think this would  
mean 4 bytes (24 bits / 8 bits-per-byte).

The support for arrays of buttons in libhid is not that great, either.  
If you are using Linux (which the output tends to imply), then you  
might be interested in the kernel input API.