I ran PyUSB regression tests with Python 3 and it is a PyUSB bug. I
suggest you to use python 2 while the bug is not fixed.
Complete Python 3 support is planned for latter releases.
Wander
2010/9/27 Igor Mohor <igor.mo...@gmail.com>:
> I tried but I get the same report:
>
> Traceback (most recent call last):
> File "X:\epc601_demo_board\qt_creator\prvi\run_mojwidget.py", line 68, in
> get_status
> print("Received from USB: ", UsbConnection.epin.read(64, 100))
> File "C:\Python31\lib\site-packages\usb\core.py", line 273, in read
> return self.device.read(self.bEndpointAddress, size, self.interface,
> timeout)
> File "C:\Python31\lib\site-packages\usb\core.py", line 624, in read
> self.__get_timeout(timeout)
> File "C:\Python31\lib\site-packages\usb\_debug.py", line 53, in do_trace
> return f(*args, **named_args)
> File "C:\Python31\lib\site-packages\usb\backend\libusb01.py", line 448, in
> bulk_read
> timeout)
> File "C:\Python31\lib\site-packages\usb\backend\libusb01.py", line 524, in
> __read
> buffer = array.array('B', '\x00' * size)
> TypeError: an integer is required
>
> You can see that there is 100 in the code.
>
> Any other ideas?
>
> Regards,
> Igor
>
>
>
>
>
> On Mon, Sep 27, 2010 at 2:42 PM, Wander Lairson <wander.lair...@gmail.com>
> wrote:
>>
>> It feels like some incompatibility bug with python 3. Try this:
>>
>> epin.read(64, 100)
>>
>> 2010/9/27 Igor Mohor <igor.mo...@gmail.com>:
>> > Dear Gentleman,
>> >
>> > I need your help. I'm trying to read some data from the USB by using the
>> > folowing code and I get the error.
>> >
>> >
>> > PythonWin 3.1.2 (r312:79147, Mar 22 2010, 12:20:29) [MSC v.1500 32 bit
>> > (Intel)] on win32.
>> > Portions Copyright 1994-2008 Mark Hammond - see 'Help/About PythonWin'
>> > for
>> > further copyright information.
>> >>>> import usb.core
>> >>>> import usb.util
>> >>>> dev =usb.core.find(idVendor=0x04d8, idProduct=0x0204)
>> >>>> dev.set_configuration()
>> >>>> interface = dev.get_interface_altsetting()
>> >>>> ep = usb.util.find_descriptor(interface,
>> > ... custom_match = \
>> > ... lambda e: \
>> > ... usb.util.endpoint_direction(e.bEndpointAddress) == \
>> > ... usb.util.ENDPOINT_OUT)
>> >>>> epin = usb.util.find_descriptor(
>> > ... interface,
>> > ... custom_match = \
>> > ... lambda e: \
>> > ... usb.util.endpoint_direction(e.bEndpointAddress) == \
>> > ... usb.util.ENDPOINT_IN)
>> >>>> ep.write([0x80])
>> > 1
>> >>>> ep.write([0x80])
>> > 1
>> >>>> ep.write([0x80])
>> > 1
>> >>>> ep.write([0x81])
>> > 1
>> >>>> epin.read(64)
>> > Traceback (most recent call last):
>> > File "<interactive input>", line 1, in <module>
>> > File "C:\Python31\lib\site-packages\usb\core.py", line 273, in read
>> > return self.device.read(self.bEndpointAddress, size, self.interface,
>> > timeout)
>> > File "C:\Python31\lib\site-packages\usb\core.py", line 624, in read
>> > self.__get_timeout(timeout)
>> > File "C:\Python31\lib\site-packages\usb\_debug.py", line 53, in
>> > do_trace
>> > return f(*args, **named_args)
>> > File "C:\Python31\lib\site-packages\usb\backend\libusb01.py", line
>> > 448, in
>> > bulk_read
>> > timeout)
>> > File "C:\Python31\lib\site-packages\usb\backend\libusb01.py", line
>> > 524, in
>> > __read
>> > buffer = array.array('B', '\x00' * size)
>> > TypeError: an integer is required
>> >>>>
>> >
>> >
>> > When I execute the same code on the following system:
>> >
>> > Python 2.6.6 (r266:84297, Aug 24 2010, 18:46:32) [MSC v.1500 32 bit
>> > (Intel)]
>> > on win32
>> > Type "copyright", "credits" or "license()" for more information.
>> >
>> > I get the correct response which is:
>> >
>> >>>> epin.read(64)
>> > array('B', [129, 1, 133, 74, 20, 208, 66, 49, 65, 160, 28, 16, 2, 88,
>> > 146,
>> > 82, 4, 0, 64, 8, 4, 131, 20, 108, 130, 30, 1, 37, 1, 84, 138, 23, 146,
>> > 2,
>> > 214, 0, 74, 96, 6, 76, 32, 220, 19, 68, 128, 200, 32, 6, 44, 148, 10, 9,
>> > 22,
>> > 128, 58, 96, 34, 132, 0, 2, 109, 0, 2, 50])
>> >>>>
>> >
>> >
>> >
>> > Can somebody help me to get the data also with version 3.1.2.
>> >
>> > Thanks and best regards,
>> > Igor
>> >
>> >
>> >
>> >
>> >
>> > ------------------------------------------------------------------------------
>> > Start uncovering the many advantages of virtual appliances
>> > and start using them to simplify application deployment and
>> > accelerate your shift to cloud computing.
>> > http://p.sf.net/sfu/novell-sfdev2dev
>> > _______________________________________________
>> > pyusb-users mailing list
>> > pyusb-users@lists.sourceforge.net
>> > https://lists.sourceforge.net/lists/listinfo/pyusb-users
>> >
>> >
>>
>>
>>
>> --
>> Best Regards,
>> Wander Lairson Costa
>>
>>
>> ------------------------------------------------------------------------------
>> Start uncovering the many advantages of virtual appliances
>> and start using them to simplify application deployment and
>> accelerate your shift to cloud computing.
>> http://p.sf.net/sfu/novell-sfdev2dev
>> _______________________________________________
>> pyusb-users mailing list
>> pyusb-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
>
> ------------------------------------------------------------------------------
> Start uncovering the many advantages of virtual appliances
> and start using them to simplify application deployment and
> accelerate your shift to cloud computing.
> http://p.sf.net/sfu/novell-sfdev2dev
> _______________________________________________
> pyusb-users mailing list
> pyusb-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
>
--
Best Regards,
Wander Lairson Costa
------------------------------------------------------------------------------
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