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
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