2013/12/2 Bartosz Alchimowicz <p...@poczta.onet.pl>:
> Wander Lairson Costa wrote:
>
> Hi
>
>
>> Sorry for the delay. According to libusb documentation, a pipe error
>> is related to sending a control request not supported by the device.
>> Are these control transfers documented by the manufacturer or part of
>> the USB class spec?
>
>
> According to documentation this chip is a usb printer class device
> ( http://www.krn.ru/Support/Docs/GMUP/ds_pl2305_v11.pdf ).
>
> Section 5.2 (Printer Class-Specific Device Requests) in this spec tells that
> GET_PORT_STATUS and SOFT_RESET are supported.
>

This sounds weird. I will review the PyUSB code to see if I find some
mistake. BTW, did notice if the usbprint driver gets loaded when you
connected your device? It might be causing the problems...

-- 
Best Regards,
Wander Lairson Costa

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