Menu
▾
▴
Re: [pyusb-users] (python) did not claim interface 0 before use
|
From: Wander L. <wan...@gm...> - 2010-07-10 13:01:50
|
2010/7/9 Diego Jacobi <jac...@gm...>:
> 2010/7/9 Wander Lairson <wan...@gm...>:
>> 2010/7/9 Diego Jacobi <jac...@gm...>:
>>> Well. I made some progress but couldnt solve the claiming error yet..
>>> This is the current "dmesg" output when i press any key in my test
>>> scenario multiple times.
>>>
>>> ...
>>> usb 3-2: New USB device found, idVendor=0451, idProduct=3410
>>> usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>>> usb 3-2: Product: USB2Serial +4GPIO
>>> usb 3-2: Manufacturer: UTICOM Diego
>>> usb 3-2: SerialNumber: TUSB3410 ):� v`�
>>> ti_usb_3410_5052_1 ttyUSB0: TI USB 3410 1 port adapter converter now
>>> disconnected from ttyUSB0
>>
>> I guess the problem comes from this event, when the device is
>> disconnected. I am not an USB
>> kernel driver expert, but I guess kernel frees the device resources
>> (including claiming) when
>> this happens. You can tell PyUSB to do everything again but calling
>> usb.util.dispose_resources.
>>
>
> That appears after dettaching the default driver.
>
> I now tried with both
> dispose_resources(self.dev)
> claim_interface(self.dev, self.interface)
> and none helped.
Where did you put it? At the end of the loop, just before a new call
to raw_input?
>
> One more tip..
> I noted this log since i am comunicating with endporint 1 IN and OUT
> to transfer data for the UART port.
>
>
>
>>> ti_usb_3410_5052 3-2:2.0: device disconnected
>>> usb 3-2: usbfs: process 12624 (python) did not claim interface 0 before use
>>> usb 3-2: usbfs: process 12624 (python) did not claim interface 0 before use
>>> usb 3-2: usbfs: process 12624 (python) did not claim interface 0 before use
>>> usb 3-2: usbfs: process 12624 (python) did not claim interface 0 before use
>>> usb 3-2: usbfs: process 12632 (python) did not claim interface 0 before use
>>>
>>>
>>>
>>> The error were produced by mistake of my in the firmware code, and now
>>> the requests are working perfectly.
>>>
>>> Because this device TUSB3410 is horrible badly documented, some parts
>>> of the "how this fucking register works!?!? " i had to figure out by
>>> trial and error.
>>> It seems like for every new coming OUT transmision i have to cancel or
>>> clear the status bits for any previus IN transfer and vicebersa. I
>>> write it here so it gets indexed in google.
>>>
>>>
>>>
>>> any way, the claiming is still an issue, but i am wondering if this
>>> have anything to do with the way that i set the test scenario with
>>>
>>> while raw_input(...):
>>>
>>>
>>> raw_input stops the code and waits for input, so .... my guess, is
>>> that if pyusb is not threaded or separate process, the it wouldnt be
>>> able to respond to libusb callbacks. Does this sounds reasonable?
>>
>> Yes, it does. I have been thinking about that, but only for a 1.1 version.
>>
>
> Looking forward then..
> Also, if you can facilitate an interface with usbmon to precisely
> generate a log file for the data transmitted, starting and stoping the
> logging with function calls, it will be great for debugging.
I can consider your suggestion, but I am trying to cut away OS
specific features as most
as I can.
>
>>>
>>> Thanks.
>>> Diego
>>>
>>>
>>>
>>>
>>> 2010/7/9 Diego Jacobi <jac...@gm...>:
>>>> If i am not mistaken... interface claiming is an OS thing, not a
>>>> firmware-possible problem.
>>>>
>>>> How can i know for sure that the interface is "claimed", and if
>>>> possible, force a "reclaim".
>>>>
>>>> Also, when i press the key for second time, there is a big pause going
>>>> (like 3 secs), which shouldnt, because the timeout is set to 100.
>>>> And also, it seems that it doesnt fails inmediately, it loses the
>>>> claim after a few requests.
>>>> check this logs. LOG lines are all ok.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> linux-7z8v:/home/diego/Desktop/TUSB3410/UTICOM/superterminal #
>>>> ./capafisica_usb.py
>>>> Presione una tecla
>>>> LOG(capafisica): OPEN usb device 0
>>>> LOG(capafisica): SET Config GPIO [0]
>>>> LOG(capafisica): SET GPIO(0x 3, 0xffff) 0
>>>> LOG(capafisica): PINGing device 15
>>>> LOG(capafisica): SET GPIO(0xff, 0x c) 0
>>>> LOG(capafisica): GET GPIO 3311
>>>> array('B', [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33])
>>>> LOG(capafisica): SET GPIO(0xff, 0x c) 0
>>>> LOG(capafisica): GET GPIO 3311
>>>> array('B', [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33])
>>>> LOG(capafisica): SET GPIO(0xff, 0x c) 0
>>>> LOG(capafisica): GET GPIO 3215
>>>> array('B', [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33])
>>>> LOG(capafisica): SET GPIO(0xff, 0x c) 0
>>>> LOG(capafisica): GET GPIO 3215
>>>> array('B', [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33])
>>>> Presione una tecla
>>>> <-------------------------------------------------------------------------------------------
>>>> HERE THERE IS A BIG DEADTIME
>>>> LOG(capafisica): OPEN usb device 0
>>>> LOG(capafisica): SET Config GPIO [0]
>>>> LOG(capafisica): SET GPIO(0x 3, 0xffff) 0
>>>> LOG(capafisica): PINGing device 15
>>>> LOG(capafisica): SET GPIO(0xff, 0x c) 0
>>>> LOG(capafisica): GET GPIO 3247
>>>> _check ERROR: -1 Input/output error
>>>> ----> ERROR(capafisica): EXCEPTION trying to send data with
>>>> (timeout,error) <class 'usb.core.USBError'>
>>>> ====> DEBUG(capafisica): ----------------- USBError('Input/output error',)
>>>> File "./capafisica_usb.py", line 203, in try_send
>>>> ....
>>>>
>>>>
>>>>
>>>>
>>>> 2010/7/9 Wander Lairson <wan...@gm...>:
>>>>> 2010/7/9 Diego Jacobi <jac...@gm...>:
>>>>>> Hi.
>>>>>>
>>>>>> As you may know, i am working in a device using an TUSB3410 with my
>>>>>> own firmware.
>>>>>>
>>>>>> Most is working.
>>>>>> I plug the device it logs in linux correctly and i am able to detach
>>>>>> the driver and make usb requests with pyusb.
>>>>>>
>>>>>> The problem comes when it has deadtime between calls then i get the
>>>>>> next message in dmesg:
>>>>>>
>>>>>> usb 3-2: usbfs: process 7564 (python) did not claim interface 0 before use
>>>>>>
>>>>>> I can not find any method for claiming interface in pyusb. Is there one?
>>>>>
>>>>> PyUSB 1.0 manages interface claiming automatically, but it can only do
>>>>> so if all stuff is done through PyUSB. It interface is released
>>>>> outside
>>>>> PyUSB, it cannot figure it out. Also, this might be a bug in PyUSB.
>>>>>
>>>>>>
>>>>>> Some more details:
>>>>>>
>>>>>> I made a class to handle the requests (capafisica) and a test scenario:
>>>>>>
>>>>>> if __name__ == '__main__':
>>>>>> fisica = capafisica()
>>>>>> fisica.logging = fisica.LOGGING_DEBUG
>>>>>> while raw_input("Presione una tecla")>0:
>>>>>> fisica.try_start()
>>>>>> fisica.test()
>>>>>> fisica.set_gpio(0xFF,mask=0x0C)
>>>>>> fisica.get_gpio()
>>>>>> fisica.try_send("Hello World!")
>>>>>> print fisica.try_recv()
>>>>>>
>>>>>>
>>>>>> When i press a key it launches the set of functions and all works
>>>>>> correctly. IF i press a key again, then most of them fails, i may say,
>>>>>> randomly. AND this error message in dmesg appears.
>>>>>>
>>>>>> However if i edit the test scenario to:
>>>>>>
>>>>>> if __name__ == '__main__':
>>>>>> fisica = capafisica()
>>>>>> fisica.logging = fisica.LOGGING_DEBUG
>>>>>> while raw_input("Presione una tecla")>0:
>>>>>> fisica.try_start()
>>>>>> fisica.test()
>>>>>> fisica.set_gpio(0xFF,mask=0x0C)
>>>>>> fisica.get_gpio()
>>>>>> fisica.try_send("Hello World!")
>>>>>> print fisica.try_recv()
>>>>>> fisica.try_start()
>>>>>> fisica.test()
>>>>>> fisica.set_gpio(0xFF,mask=0x0C)
>>>>>> fisica.get_gpio()
>>>>>> fisica.try_send("Hello World!")
>>>>>> print fisica.try_recv()
>>>>>> fisica.try_start()
>>>>>> fisica.test()
>>>>>> fisica.set_gpio(0xFF,mask=0x0C)
>>>>>> fisica.get_gpio()
>>>>>> fisica.try_send("Hello World!")
>>>>>> print fisica.try_recv()
>>>>>> fisica.try_start()
>>>>>> fisica.test()
>>>>>> fisica.set_gpio(0xFF,mask=0x0C)
>>>>>> fisica.get_gpio()
>>>>>> fisica.try_send("Hello World!")
>>>>>> print fisica.try_recv()
>>>>>>
>>>>>>
>>>>>> Then all the calls works.
>>>>>> In that way i discard that can be a problem in my firmware. Well, i do
>>>>>> not discard it completely, but i need to know how to "claim the
>>>>>> interface"
>>>>>>
>>>>>>
>>>>>>
>>>>>> Thanks
>>>>>> Diego
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> This SF.net email is sponsored by Sprint
>>>>>> What will you do first with EVO, the first 4G phone?
>>>>>> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
>>>>>> _______________________________________________
>>>>>> pyusb-users mailing list
>>>>>> pyu...@li...
>>>>>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Best Regards,
>>>>> Wander Lairson Costa
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> This SF.net email is sponsored by Sprint
>>>>> What will you do first with EVO, the first 4G phone?
>>>>> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
>>>>> _______________________________________________
>>>>> pyusb-users mailing list
>>>>> pyu...@li...
>>>>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>>>>
>>>>
>>>
>>> ------------------------------------------------------------------------------
>>> This SF.net email is sponsored by Sprint
>>> What will you do first with EVO, the first 4G phone?
>>> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
>>> _______________________________________________
>>> pyusb-users mailing list
>>> pyu...@li...
>>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>>
>>
>>
>>
>> --
>> Best Regards,
>> Wander Lairson Costa
>>
>> ------------------------------------------------------------------------------
>> This SF.net email is sponsored by Sprint
>> What will you do first with EVO, the first 4G phone?
>> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
>> _______________________________________________
>> pyusb-users mailing list
>> pyu...@li...
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>
>
> ------------------------------------------------------------------------------
> This SF.net email is sponsored by Sprint
> What will you do first with EVO, the first 4G phone?
> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
--
Best Regards,
Wander Lairson Costa
|
