2014-05-20 13:26 GMT-03:00 Slavko Kocjancic <esla...@gmail.com>:
> Hello...
>
> I'm new to python (and pyusb).
> I try to port some VUSB device to work with python, but get at trouble
> in beggining. I can't send bytes...
> here is my example (stripped from manual...)
>
> import usb.core
> import usb.util
>
> from array import *
> dev = usb.core.find(idVendor=0x16c0, idProduct=0x05df)
> if dev is None:
> raise ValueError('Device not found')
> dev.set_configuration()
>
> msg = 'test'
> print dev.ctrl_transfer(32+128, 9, 0, 0, msg)
>
I guess the first argument should be just 32.
> and there is error report
>
> Traceback (most recent call last):
> File "pyusbtest.py", line 13, in <module>
> print dev.ctrl_transfer(32+128, 9, 0, 0, msg)
> File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 711,
> in ctrl_transfer
> self.__get_timeout(timeout)
> File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py",
> line 823, in ctrl_transfer
> buff = _interop.as_array((0,) * data_or_wLength)
> TypeError: can't multiply sequence by non-int of type 'str'
>
> how to proceed? (python2.7 on ubuntu)
> slavko.
>
>
>
--
Best Regards,
Wander Lairson Costa
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