Follow-up: Santiago:
Also found the method doesn't exists in pyusb 1.0 apparently it manages
interface claiming automatically.
source:
http://www.mail-archive.com/pyusb-users@lists.sourceforge.net/msg00374.html
On Tue, Dec 14, 2010 at 3:30 PM, Marcos Wolff <wmar...@gmail.com> wrote:
> Hi Santiago,
>
> Following this tutorial it doesn't seem to be needed:
>
> http://pyusb.sourceforge.net/docs/1.0/tutorial.htm#talk-to-me-honey
>
> Anyway I've tried (kind of desperate here) and didn't work :(
>
> thank for the quick answer !
>
>
> On Tue, Dec 14, 2010 at 3:18 PM, Santiago Palomino Sanchez-Manjavacas <
> sps...@gmail.com> wrote:
>
>> missing claimInterface() before using the control endpoint?
>>
>> Just a guess
>>
>> On Tue, Dec 14, 2010 at 18:54, Marcos Wolff <wmar...@gmail.com> wrote:
>>
>>> Hi everyone,
>>>
>>> I'm having trouble comunicating with a custom made (from a PIC 18f4550
>>> micro-controller) HID device. Nowadays is used with windows and the default
>>> HID driver in vb6 but I would like to port it to linux (ubuntu 10.10) and
>>> pyusb (1.0a).
>>>
>>> The device is simple, when it receives 3 bytes via HID it responses 3
>>> bytes back with data. The people who made it told me that everything is
>>> handled via end point 0 and default config).
>>>
>>> As I want to port it to linux I read this tutorial
>>> http://pyusb.sourceforge.net/docs/1.0/tutorial.html and tried to
>>> communicate via default config endpoint configuration:
>>>
>>> #prueba.py
>>>
>>> import usb.core
>>>
>>> #busco dispositivo
>>> dev = usb.core.find(idVendor=1240,idProduct=32)
>>> if dev is None:
>>> raise ValueError('Device not found')
>>>
>>> interface = dev.get_interface_altsetting()
>>> if dev.is_kernel_driver_active(interface.bInterfaceNumber) is True:
>>> dev.detach_kernel_driver(interface.bInterfaceNumber)
>>>
>>>
>>> dev.set_configuration()
>>>
>>> #mensaje de 3 bytes
>>> msg = '\x02\x03\x00'
>>>
>>> #bmRequestType y bRequest as said in
>>> http://www.jungo.com/st/support/documentation/windriver/811/wdusb_man_mhtml/node55.html#usb_standard_dev_req_codes
>>>
>>>
>>> dev.ctrl_transfer(0x40, 0x02, 0, 0, msg)
>>>
>>>
>>> and I get this error which I don't fully understand:
>>>
>>> Traceback (most recent call last):
>>> File "ejemplo.py", line 39, in <module>
>>> print dev.ctrl_transfer(0x40, 0x02, 0, 0, msg)
>>> File "/home/administrador/pyusb-1.0.0-a0/usb/core.py", line 668, in
>>> ctrl_transfer
>>> self.__get_timeout(timeout)
>>> File "/home/administrador/pyusb-1.0.0-a0/usb/_debug.py", line 53, in
>>> do_trace
>>> return f(*args, **named_args)
>>> File "/home/administrador/pyusb-1.0.0-a0/usb/backend/libusb10.py", line
>>> 538, in ctrl_transfer
>>> timeout))
>>> File "/home/administrador/pyusb-1.0.0-a0/usb/backend/libusb10.py", line
>>> 353, in _check
>>> raise USBError(_str_error[retval.value])
>>> *usb.core.USBError: Pipe error*
>>>
>>> Could someone guide me ? help me see what I'm doing wrong ?
>>>
>>> Thanks in advance !
>>> Marcos.
>>>
>>>
>>> PD: I tried to sniff usb ports with this tutorial
>>> http://biot.com/blog/usb-sniffing-on-linux but nothing seems to be
>>> happening excepto when I reset the device.
>>>
>>>
>>>
>>>
>>>
>>>
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>>
>>
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