Re: [pyusb-users] Cannot force PL2305 to work

[Wander L. C. <wan...@gm...>]

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 <pe...@po...>:
> 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
>
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-- 
Best Regards,
Wander Lairson Costa