Lego NXT brick communication error with libusb

[Rene Ladan]

Op 14-12-2010 05:08, Hans Petter Selasky schreef:
> On Monday 13 December 2010 21:23:51 Rene Ladan wrote:
>> Op 13-12-2010 11:51, Hans Petter Selasky schreef:
>>> On Sunday 12 December 2010 23:40:54 Rene Ladan wrote:
>>>> Hi,
>>>>
>>>> I am writing a port [1] to control the Lego NXT brick with ROS, but when
>>>> I run a test program it fails (permissions for the USB device are 666).
>>>
>>>> This is on:
>>> What dmesg is shown? Are other [kernel] drivers hooking into the USB
>>> interfaces used by your user-land driver?
>>
>> dmesg shows just:
>> ugen3.2: <vendor 0x0694> at usbus3
>> Vendor 0x0694 is Lego.
>>
>> I don't have other drivers hooking into the USB device I think:
>> % kldstat -v | grep usb
>> 		276 usbus/uhub
>> 		275 uhub/usb_linux
>> 		273 uss820/usbus
>> 		272 musbotg/usbus
>> 		271 at91_udp/usbus
>> 		270 xhci/usbus
>> 		269 ehci/usbus
>> 		268 uhci/usbus
>> 		267 ohci/usbus
>>
>>> What is output from usbconfig -d X.Y dump_device_desc
>>> dump_curr_config_desc
>>
>> Attached.
>>
>> Rene
> 
> What happens if you remove that device reset line from your driver?
>
That does the trick, reading sensor data as user now works :) So on
Linux this reset line is harmless, but on FreeBSD it has to be removed.

Rene
-- 
http://www.rene-ladan.nl/

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