Hi,
Thanks again for the help with this...
I tried the suggestion, using the below code snippits:
import usb.core
import usb.util
import usb.backend.libusb01
backend = usb.backend.libusb01.get_backend()
devs = usb.core.find(backend=backend, find_all=True,
custom_match=findFromList(vendor, product))
It appears to be a similar/same issue in terms of symptoms. Again, the
issue seems to be the SECOND read/write operation after I plug a new
device in -- the first one works.
~/killerbee/killerbee$ sudo zbid
Warning: You are using pyUSB 1.x, support is in alpha.
Dev Product String Serial Number
3:4 KILLERB001 A50400A01C25
Found 1 devices.
~/killerbee/killerbee$ sudo zbdump -f 11 -w test.pcap -i 3:4
Warning: You are using pyUSB 1.x, support is in alpha.
Warning: You are using pyUSB 1.x, support is in alpha.
zbdump: listening on '3:4', link-type DLT_IEEE802_15_4, capture size 127 bytes
Traceback (most recent call last):
File "/usr/local/bin/zbdump", line 100, in <module>
packet = kb.pnext()
File "/usr/local/lib/python2.7/dist-packages/killerbee/__init__.py",
line 270, in pnext
return self.driver.pnext(timeout)
File "/usr/local/lib/python2.7/dist-packages/killerbee/dev_rzusbstick.py",
line 443, in pnext
pdata = self.dev.read(RZ_USB_PACKET_EP, 1, 0, 100)
File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 654, in read
self.__get_timeout(timeout)
File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb01.py",
line 483, in bulk_read
timeout)
File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb01.py",
line 568, in __read
timeout
File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb01.py",
line 384, in _check
raise USBError(errmsg, ret)
usb.core.USBError: [Errno None] Connection timed out
This timeout error happens on the second USB related call within the
zbdump program. Removing and reinserting the device fixes the issue.
The same symptom occurs when I import libusb10 and use that
explicitly. Do you have other ideas for what this could be? Is a
resource not getting properly released?
Thanks,
Ryan
On 12/27/12, Wander Lairson Costa <wander.lair...@gmail.com> wrote:
> 2012/12/26 Ryan Speers <rmspe...@gmail.com>:
>> Hello,
>>
>> Thanks -- I think that usb.legacy isn't exactly compatible yet in this
>> regard, specifically as the bus.dirname and dev.filename attributes
>> aren't
>> set. So, I've decided to go ahead and detect what version of pyUSB is
>> being
>> used (by trying to import usb.core and catching the exception).
>>
>> But, here is the issue I'm having... when going down the USBVER==1 branch,
>> I
>> get timeout errors after the first connection attempt.
>> My device, an RZUSBSTICK has a hierarchy of:
>> Config value: 1
>> Interface number 0, with alternate setting 0
>> Endpoint 132 for responses
>> Endpoint 2 for control
>> Endpoint 129 for packets
>>
>> What I do for setup is:
>> self.dev.set_configuration(1)
>> self.dev.set_interface_altsetting(interface = 0, alternate_setting = 0)
>>
>> Then, in my write function, you see the following (first comes the pyUSB
>> 0.x
>> code, then the 1.x code as marked):
>> if USBVER == 0:
>> try:
>> self.handle.bulkWrite(endpoint, data)
>> # Returns a tuple, first value is an int as the RZ_RESP_*
>> code
>> response = self.handle.bulkRead(RZ_USB_RESPONSE_EP, 1)[0]
>> except usb.USBError, e:
>> if e.args != ('No error',): #
>> http://bugs.debian.org/476796
>> raise e
>> time.sleep(0.0005)
>> if response != RZ_RESP_SUCCESS:
>> if response in RESPONSE_MAP:
>> raise Exception("Error: %s" % RESPONSE_MAP[response])
>> else:
>> raise Exception("Unknown USB write error: 0x%02x" %
>> response)
>> else: #pyUSB 1.x
>> res = self.dev.write(endpoint, data, 0, 100)
>> if len(data) != res:
>> raise Exception("Issue writing USB data {0} to endpoint
>> {1},
>> got a return of {2}.".format(data, endpoint, res))
>> response = self.dev.read(RZ_USB_RESPONSE_EP, 1, 0, 500).pop()
>> #TODO reduce timeout?
>> if response != RZ_RESP_SUCCESS:
>> if response in RESPONSE_MAP:
>> raise Exception("Error: %s" % RESPONSE_MAP[response])
>> else:
>> raise Exception("Unknown USB write error: 0x%02x" %
>> response)
>>
>> Second set of code:
>> if USBVER == 0:
>> try:
>> pdata = self.handle.bulkRead(RZ_USB_PACKET_EP, timeout)
>> except usb.USBError, e:
>> if e.args != ('No error',): #
>> http://bugs.debian.org/476796
>> if e.args[0] != "Connection timed out": # USB timeout
>> issue
>> print "Error args:", e.args
>> raise e
>> else: # pyUSB 1.x
>> pdata = self.dev.read(RZ_USB_PACKET_EP, 1, 0, 100)
>> #TODO error handling
>>
>> The 0.x code has some odd code in there to deal with errors I've had in
>> the
>> past. Here is the exception I get back when the second self.dev.read() is
>> called. I get the timeout error if I call the read on this second
>> endpoint,
>> as shown below, or if I call it on the first endpoint again (by running
>> the
>> program again).
>>
>> zbdump: listening on '2:12', link-type DLT_IEEE802_15_4, capture size 127
>> bytes
>> Traceback (most recent call last):
>> ...
>> File
>> "/usr/local/lib/python2.7/dist-packages/killerbee/dev_rzusbstick.py",
>> line 443, in pnext
>> pdata = self.dev.read(RZ_USB_PACKET_EP, 1, 0, 100)
>> File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 654, in
>> read
>> self.__get_timeout(timeout)
>> File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py",
>> line 541, in bulk_read
>> timeout)
>> File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py",
>> line 641, in __read
>> timeout))
>> File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py",
>> line 403, in _check
>> raise USBError(_str_error[ret], ret, _libusb_errno[ret])
>> usb.core.USBError: [Errno 110] Operation timed out
>>
>>
>
> You are using libusb 1.0 when using PyUSB 1.0, and libusb 0.1 when
> using PyUSB 0.4. What about forcing libusb0 backend in PyUSB 1.0?
>
> import usb.core
> import usb.backend.libusb0
>
> b = usb.backend.libusb0.get()
> d = usb.core.find(backend = b, .....)
>
> --
> Best Regards,
> Wander Lairson Costa
>
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--
Ryan Speers
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