If you're running on Windows 7, you probably need to create a .ini with
libusb and may need to run your app as administrator.
On Mon, May 30, 2011 at 09:36, wander.lairson <wander.lair...@gmail.com>wrote:
> 2011/5/30 Vishwanath Saragadam <vishwa....@gmail.com>:
> > Hi,
> > I am new to Pyusb as well as python.I am trying a simple usb
> > communucation but is not working.when i invoke dev.write(), i get the
> > following error.
> >
> >
> > Traceback (most recent call last):
> > File "<pyshell#5>", line 1, in <module>
> > dev.write(1, 'test')
> > File "E:\Python27\lib\site-packages\usb\core.py", line 593, in write
> > intf = self._ctx.get_interface(self, interface)
> > File "E:\Python27\lib\site-packages\usb\core.py", line 148, in
> > get_interface
> > cfg = self.get_active_configuration(device)
> > File "E:\Python27\lib\site-packages\usb\core.py", line 165, in
> > get_active_configuration
> > bConfigurationValue=self.backend.get_configuration(self.handle)
> > File "E:\Python27\lib\site-packages\usb\_debug.py", line 52, in
> do_trace
> > return f(*args, **named_args)
> > File "E:\Python27\lib\site-packages\usb\backend\libusb01.py", line 438,
> in
> > get_configuration
> > 100
> > File "E:\Python27\lib\site-packages\usb\_debug.py", line 52, in
> do_trace
> > return f(*args, **named_args)
> > File "E:\Python27\lib\site-packages\usb\backend\libusb01.py", line 518,
> in
> > ctrl_transfer
> > timeout
> > WindowsError: exception: access violation reading 0x00000018
> >
> >
> > Please help, as it is very crucial for my project.
> >
> >
> Could you please post your code?
>
>
> --
> Best Regards,
> Wander Lairson Costa
> LCoN - Laboratório de Computação Natural - Natural Computing Laboratory
> (http://www.mackenzie.com.br/lcon.html)
> Programa de Pós-Graduação em Engenharia Elétrica (PPGEE)
> Faculdade de Computação e Informática (FCI)
> Universidade Presbiteriana Mackenzie - SP - Brazil
>
>
> ------------------------------------------------------------------------------
> vRanger cuts backup time in half-while increasing security.
> With the market-leading solution for virtual backup and recovery,
> you get blazing-fast, flexible, and affordable data protection.
> Download your free trial now.
> http://p.sf.net/sfu/quest-d2dcopy1
> _______________________________________________
> pyusb-users mailing list
> pyusb-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
------------------------------------------------------------------------------
vRanger cuts backup time in half-while increasing security.
With the market-leading solution for virtual backup and recovery,
you get blazing-fast, flexible, and affordable data protection.
Download your free trial now.
http://p.sf.net/sfu/quest-d2dcopy1
_______________________________________________
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users
