This is rather strange, some control requests work, some don't.

Could you please activate the PYUSB_DEBUG=debug and LIBUSB_DEBUG=3
environment variables and send the output?

2013/11/28 Bartosz Alchimowicz <p...@poczta.onet.pl>:
> Hello
>
> I'm new here and I have a problem with USB-to-parallal converter based
> on PL2305 chip (067b:2305 Prolific Technology, Inc. PL2305 Parallel Port).
>
> I can find device and read GET_DEVICE_ID, but GET_PORT_STATUS,
> SOFT_RESET and write to endpoints is not working :/
>
> I use pyusb-1.0.0b1-py2.7
>
> Here is my code:
>
> import usb.core
> import usb.util
>
> dev = usb.core.find(idVendor=0x067b, idProduct=0x2305)
> dev.set_configuration()
> cfg = dev.get_active_configuration()
>
> dev.set_interface_altsetting(interface = 0, alternate_setting = 1)
>
> interface = cfg[(0, 1)] # Bidirectional, other are also not working
>
> ep = usb.util.find_descriptor(interface, find_all=True)
>
> dev.ctrl_transfer(161, 0, 0, 0, 256) # GET_DEVICE_ID works ok
>
> # below nothing works :(
> # GET_PORT_STATUS
>
>  >>> dev.ctrl_transfer(161, 1, 0, 0, 1)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/core.py",
> line 711, in ctrl_transfer
>      self.__get_timeout(timeout)
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
> line 836, in ctrl_transfer
>      timeout))
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
> line 571, in _check
>      raise USBError(_str_error[ret], ret, _libusb_errno[ret])
> usb.core.USBError: [Errno 32] Pipe error
>
> # SOFT_RESET
>
>  >>> dev.ctrl_transfer(33, 2, 0, 0, " ") # i'm not sure it is correct
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/core.py",
> line 711, in ctrl_transfer
>      self.__get_timeout(timeout)
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
> line 836, in ctrl_transfer
>      timeout))
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
> line 571, in _check
>      raise USBError(_str_error[ret], ret, _libusb_errno[ret])
> usb.core.USBError: [Errno 32] Pipe error
>
> # write data
>
>  >>> ep[0].write("aaa")
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/core.py",
> line 287, in write
>      return self.device.write(self.bEndpointAddress, data,
> self.interface, timeout)
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/core.py",
> line 633, in write
>      self.__get_timeout(timeout)
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
> line 771, in bulk_write
>      timeout)
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
> line 872, in __write
>      _check(retval)
>    File
> "/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
> line 571, in _check
>      raise USBError(_str_error[ret], ret, _libusb_errno[ret])
> usb.core.USBError: [Errno 110] Operation timed out
>
>
> Regards and thanks for help
> Perf
>
> ------------------------------------------------------------------------------
> Rapidly troubleshoot problems before they affect your business. Most IT
> organizations don't have a clear picture of how application performance
> affects their revenue. With AppDynamics, you get 100% visibility into your
> Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
> http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk
> _______________________________________________
> pyusb-users mailing list
> pyusb-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pyusb-users



-- 
Best Regards,
Wander Lairson Costa

------------------------------------------------------------------------------
Rapidly troubleshoot problems before they affect your business. Most IT 
organizations don't have a clear picture of how application performance 
affects their revenue. With AppDynamics, you get 100% visibility into your 
Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk
_______________________________________________
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users

Reply via email to