> From: wander.lair...@gmail.com
> Date: Mon, 14 Jan 2013 19:12:37 -0200
> To: pyusb-users@lists.sourceforge.net
> Subject: Re: [pyusb-users] Overflow in bulkRead
>
> 2013/1/14 Alan Jhonn Aguiar Schwyn <alan...@hotmail.com>:
> > Hi,
> >
> > I'm searching and not found nothing about this problem.
> > When I try to read 5 bytes of one device and it can't, returns an overflow
> > that I
> > can't restore the comunication. Any ideas?
> >
> > The pyusb it's the latest in the master branch of GIT.
> >
> > File "com_usb.py", line 56, in read
> > return self.handle.bulkRead(ADMIN_MODULE_OUT_ENDPOINT, length, TIMEOUT)
> > File "usb/legacy.py", line 159, in bulkRead
> > return self.dev.read(endpoint, size, self.__claimed_interface, timeout)
> > File "usb/core.py", line 667, in read
> > self.__get_timeout(timeout)
> > File "usb/backend/libusb1.py", line 550, in bulk_read
> > timeout)
> > File "usb/backend/libusb1.py", line 657, in __read
> > _check(retval)
> > File "usb/backend/libusb1.py", line 407, in _check
> > raise USBError(_str_error[ret], ret, _libusb_errno[ret])
> > usb.core.USBError: [Errno 75] Overflow
> >
>
> Doesn't the device have any data? Or is the data packet larger than 5
> bytes? AFAIK, the error shouldn't cause communication breakage..
>
I think that the device not have data..
After the overflow, the send command seems work. (I send one packet of 4bytes
and returns 4)But the read continues returning "overflow" :-(
> --
> Best Regards,
> Wander Lairson Costa
>
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