What is "st" in a=ep_out.write(st) ?
2010/9/21 Begoña Fuentes <begofume...@gmail.com>:
> Hi everybody, this is my first time in this list, so I apologize in advance
> if this is not the way to contact you.
> I am newer with pyusb and I am having a trouble that I am not able to solve
> by myself, so I would appreciate any help you can give me.
> I am trying to obtain diverse information from a USB device. I have the
> communication protocol (so I know what commands I have to write) and I am
> working under Ubuntu 10.04 The problem is that I am always getting
> "Operation Timed Out" error after reading, so I am not able to read
> anything.
> This is my code: (any comment would be extra-appreciated)
> import usb.core
> import usb.util
> import usb
> import sys
> command ="0x0000 0x0000 0x0000 0x0000 0x0000 0x0000"
> dev = usb.core.find(idVendor=0x0590, idProduct=0x0028)
> if dev is None:
> raise ValueError('Device not found')
> dev.set_configuration()
>
> #Find endpoints
> ep_out = usb.util.find_descriptor(
> dev.get_interface_altsetting(), # first interface
> # match the first OUT endpoint
> custom_match = \
> lambda e: \
> usb.util.endpoint_direction(e.bEndpointAddress) == \
> usb.util.ENDPOINT_OUT
> )
>
> ep_in = usb.util.find_descriptor(
> dev.get_interface_altsetting(), # first interface
> # match the first OUT endpoint
> custom_match = \
> lambda e: \
> usb.util.endpoint_direction(e.bEndpointAddress) == \
> usb.util.ENDPOINT_IN
> )
>
> a=ep_out.write(st)
> ret=ep_in.read(64, timeout=12000)
> print ret
>
> Thank you in advance!!
> --
> Begoña Fuentes
>
> ------------------------------------------------------------------------------
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>
--
Best Regards,
Wander Lairson Costa
------------------------------------------------------------------------------
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and start using them to simplify application deployment and
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