Yes, you are completely right!!
I don't get "Operation Timed Out" error anymore! Actually it was not only
that error.. I had a silly error: I was trying to read more bytes (64) than
the number of bytes the device was writing (16)!!
A least now I am getting an answer, even though it is not the expected.
Taking advantage of your kindness I am going to ask another question:
My device is supposed to answer only two commands. Either "O""K", which in
ASCII is "0x004F 0x004B 0x0000 0x0000 ..." or "N""O", which is "0x004E
0x004F 0x0000 0x0000 ..."....But it doesn't matter what command I send I
always get "0x0008 0x0080 0x0000 0x0000 0x0008 0x0080 0x0000 0x0000".
>From your experience....Do you think that since my device is not supposed to
send that answer it is possible that the one answering is not my device, but
rather the USB controller itself or something like that?. I don't know if
this matter but my USB device is not mounted in my Ubuntu system...I mean,
it appears in /dev/usb folder but if I type $mount I can not find it there.
Once again, thank you very much for your help!
*
--
Begoña Fuentes*
2010/9/21 Wander Lairson <wander.lair...@gmail.com>
> I guess what you mean in command is
>
> command =[0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
>
> 2010/9/21 Begoña Fuentes <begofume...@gmail.com>:
> > Sorry! st=command....I made that change when I copied the code to make it
> > more legible...I have changed it already.
> > --
> > Begoña Fuentes
> >
> >
> > 2010/9/21 Wander Lairson <wander.lair...@gmail.com>
> >>
> >> 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(command)
> >> > ret=ep_in.read(64, timeout=12000)
> >> > print ret
> >> >
> >> > Thank you in advance!!
> >> > --
> >> > Begoña Fuentes
> >> >
> >> >
> >> >
> ------------------------------------------------------------------------------
> >> > Start uncovering the many advantages of virtual appliances
> >> > and start using them to simplify application deployment and
> >> > accelerate your shift to cloud computing.
> >> > http://p.sf.net/sfu/novell-sfdev2dev
> >> > _______________________________________________
> >> > pyusb-users mailing list
> >> > pyusb-users@lists.sourceforge.net
> >> > https://lists.sourceforge.net/lists/listinfo/pyusb-users
> >> >
> >> >
> >>
> >>
> >>
> >> --
> >> Best Regards,
> >> Wander Lairson Costa
> >>
> >>
> >>
> ------------------------------------------------------------------------------
> >> Start uncovering the many advantages of virtual appliances
> >> and start using them to simplify application deployment and
> >> accelerate your shift to cloud computing.
> >> http://p.sf.net/sfu/novell-sfdev2dev
> >> _______________________________________________
> >> pyusb-users mailing list
> >> pyusb-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/pyusb-users
> >
> >
> >
> ------------------------------------------------------------------------------
> > Start uncovering the many advantages of virtual appliances
> > and start using them to simplify application deployment and
> > accelerate your shift to cloud computing.
> > http://p.sf.net/sfu/novell-sfdev2dev
> > _______________________________________________
> > pyusb-users mailing list
> > pyusb-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/pyusb-users
> >
> >
>
>
>
> --
> Best Regards,
> Wander Lairson Costa
>
>
> ------------------------------------------------------------------------------
> Start uncovering the many advantages of virtual appliances
> and start using them to simplify application deployment and
> accelerate your shift to cloud computing.
> http://p.sf.net/sfu/novell-sfdev2dev
> _______________________________________________
> pyusb-users mailing list
> pyusb-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
------------------------------------------------------------------------------
Start uncovering the many advantages of virtual appliances
and start using them to simplify application deployment and
accelerate your shift to cloud computing.
http://p.sf.net/sfu/novell-sfdev2dev
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