Hi,
libusbx had indeed an issue, but now, it is fixed. I cant get without problems
an string descriptor from a HID device, but his works only in C. With pyUSB I
get the same error: "[Errno None] Overflow".
Maybe pyUSB has a bug, too?
This is the way how I retrieve the string descriptor:
def get_manufactorer_name(self):
if self.device.iManufacturer > 0:
string = usb.util.get_string(self.device, 254,
self.device.iManufacturer)
return string
return ""
I can't post any debug messages, because I don't know how to activate them in
pyUSB. I tried this, but it doesn't work:
os.environ['PYUSB_DEBUG_LEVEL'] = 'debug'
Best regards
Stefano
-------- Original-Nachricht --------
> Datum: Sun, 28 Oct 2012 13:10:18 +0100
> Von: Tormod Volden <[email protected]>
> An: [email protected]
> Betreff: Re: [pyusb-users] Getting string descriptor
> On Fri, Oct 26, 2012 at 3:41 PM, Stefano Di Martino wrote:
> > The value of desc.iManufacturer is 1. In my last mail (which have to be
> approved by the moderator, because it has an attachment(my project)) I
> wrote 2, what was wrong read. device.iManufacturer does not exsists.
> >
>
> device.iManufacturer was from your python example. Never mind, if it
> works with libusb my question was not important (and the value seems
> fine anyway). It seems like an issue with libusbx or underlying
> drivers (WinUSB?), so please follow up on your thread on
> libusbx-devel. Did you try using zadig.exe to choose driver for your
> device, instead of an .inf file? For exactly what driver was your .inf
> file?
>
> Regards,
> Tormod
>
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