[libhid-discuss] Opening Microchip Mouse In a Circle Demo in ubuntu

[Charles Lepple]

On Aug 7, 2008, at 9:07 AM, Kim Chuan Lim wrote:

> Please find the codes below..
>
> int const PATH_OUT[2] = {0xffff0001,0x81};

Try changing that to {0xffff0001, 0xffff0000} and see if it works.

>   int i=0;
>       char packet[64];
>       packet[0] =0x0;
>       ret = hid_get_input_report(hid, PATH_OUT, 2, packet, 64);
>       if (ret != HID_RET_SUCCESS) {
>         fprintf(stderr, "hid_get_input_report failed with return code
> %d\n", ret);
>         break;
>       }else{
>
>         fprintf(stderr, " data is availabled \n");
>       }
>
>
> On Thu, Aug 7, 2008 at 1:22 PM, Charles Lepple <clepple at ghz.cc> wrote:
>> On Aug 7, 2008, at 4:37 AM, Kim Chuan Lim wrote:
>>
>>> parse tree of HIDInterface 004/006[0]:
>>>  path: 0xffff0001.0x00000000; type: 0x80
>>>  path: 0xffff0001.0x00000000; type: 0x80
>>>  path: 0xffff0001.0x00000000; type: 0x80
>>>  path: 0xffff0001.0x00000000; type: 0x80
>>
>> [...]
>>
>>> TRACE: hid_reset_parser(): resetting the HID parser for USB device
>>> 004/006[0]...
>>>  TRACE: hid_get_input_report(): looking up report ID...
>>>  TRACE: hid_prepare_parse_path(): preparing search path of depth 2
>>> for parse tree of USB device 004/006[0]...
>>>  TRACE: hid_prepare_parse_path(): search path prepared for parse  
>>> tree
>>> of USB device 004/006[0].
>>>  NOTICE: hid_find_object(): found requested item.
>>>  TRACE: hid_get_input_report(): retrieving report ID 0x00 (length:
>>> 64) from USB device 004/006[0]...
>>> WARNING: hid_get_input_report(): failed to retrieve report from USB
>>> device 004/006[0]:error sending control message: Broken pipe.
>>
>> Can you send the code you are using for this portion? The "Broken  
>> pipe"
>> error probably means that the device was not expecting a request  
>> for that
>> many bytes.
>>
>>>           Item(Local ): Usage Minimum, data= [ 0x01 ] 1
>>>                           (null)
>>>           Item(Local ): Usage Maximum, data= [ 0x40 ] 64
>>>                           (null)
>>
>>
>> The hid_dump_tree() function does not properly print the trace for  
>> a range
>> of Usage IDs. So your "Usage Path" in libhid would probably look  
>> something
>> like { 0xffff0001, 0xffff0001 } through { 0xffff0001, 0xffff0040 }.
>>
>> --
>> Charles Lepple
>>
>>
>>
>
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-- 
Charles Lepple
clepple at ghz.cc