As much more people use libusb instead of OpenUSB (probably because OpenUSB is an younger library), I postponed it in favor of making the libusb backend stable. I hope getting libusb reasonably stable and start the heavy development of OpenUSB.
2010/7/12 Chris Wolf <cw10...@gmail.com>: > > > On 7/12/10 9:00 AM, Chris Wolf wrote: >> Wander, >> >> Earlier, I mentioned that the openusb backend did not work for me on >> MacOS, but I'm pretty sure I found the problem. There seems to be a >> typo in backend/openusb.py on line #155, where it configures the return >> type for the function "openusb_init" - this line refers to the function >> as "openusb" rather then "openusb_init": >> >> $ diff -u openusb.py.orig openusb.py >> --- openusb.py.orig 2010-07-12 08:51:37.000000000 -0400 >> +++ openusb.py 2010-07-12 08:51:49.000000000 -0400 >> @@ -152,7 +152,7 @@ >> def _setup_prototypes(lib): >> # int32_t openusb_init(uint32_t flags , openusb_handle_t *handle); >> lib.openusb_init.argtypes = [c_uint32, POINTER(_openusb_handle)] >> - lib.openusb.restype = c_int32 >> + lib.openusb_init.restype = c_int32 >> >> # void openusb_fini(openusb_handle_t handle ); >> lib.openusb_fini.argtypes = [_openusb_handle] >> >> >> After making this fix, my test code was able to successfully use the >> openusb backend to iterate over all my USB devices. >> >> The download code archive this occurs in is named, "pyusb-1.0.0-a0.zip". >> > Well, actually, I forgot to override the backend in find(), so it used > libusb10, sorry. (I still think this patch is legitimate) > > There are still problems with the openusb backend: > >>>> devices = usb.core.find(find_all=True, backend=usbbe) > 2010-07-12 09:10:58,295 DEBUG:usb.backend.openusb:_OpenUSB.enumerate_devices() > Exception exceptions.AttributeError: "'_BusIterator' object has no attribute > 'buslist'" in <bound method _BusIterator.__del__ of > <usb.backend.openusb._BusIterator object at 0x12649f0>> ignored > Traceback (most recent call last): > File "<stdin>", line 1, in ? > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/core.py", > line 824, in find > return [d for d in device_iter(k, v)] > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/core.py", > line 794, in device_iter > for dev in backend.enumerate_devices(): > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/backend/openusb.py", > line 420, in enumerate_devices > for bus in _BusIterator(): > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/backend/openusb.py", > line 390, in __init__ > self.buslist = POINTER(openusb_busid_t)() > NameError: global name 'openusb_busid' is not defined > > So I again patched as: > $ diff -u openusb.py.orig > /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/backend/openusb.py > --- openusb.py.orig 2010-07-12 08:51:37.000000000 -0400 > +++ > /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/backend/openusb.py > 2010-07-12 09:10:42.000000000 -0400 > > @@ -387,7 +387,7 @@ > > class _BusIterator(object): > def __init__(self): > - self.buslist = POINTER(openusb_busid)() > + self.buslist = POINTER(openusb_busid_t)() > num_busids = c_uint32() > _check(_lib.openusb_get_busid_list(_ctx.handle, > byref(self.buslist), > > > But now I'm getting this error: > >>>> import usb.backend.openusb >>>> usbbe = usb.backend.openusb.get_backend() > dlerror: dlopen(/usr/local/lib/openusb_backend/darwin.so, 1): Symbol not > found: _usbi_devices > Referenced from: /usr/local/lib/openusb_backend/darwin.so > Expected in: flat namespace > > fail to load /usr/local/lib/openusb_backend/darwin.so > 2010-07-12 09:28:04,603 ERROR:usb.backend.openusb:Error loading OpenUSB > backend > Traceback (most recent call last): > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/backend/openusb.py", > line 590, in get_backend > _ctx = _Context() > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/backend/openusb.py", > line 384, in __init__ > _check(_lib.openusb_init(0, byref(self.handle))) > File > "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/usb/backend/openusb.py", > line 376, in _check > if retval.value != 0: > AttributeError: 'int' object has no attribute 'value' > > Again, I'm happy to just use libusb10 > > Thanks, > > Chris Wolf > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users > -- Best Regards, Wander Lairson Costa ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? 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