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Re: [pyusb-users] dev.set_configuration() not executing
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From: Jacques-D. P. <jac...@bl...> - 2019-01-21 06:34:42
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Hi Charles, What kind of device are you trying to communicate with? Regards, Jacques-D. On 21.01.19 05:23, charles wilson wrote: > Hi Guys, > Thanks for your time and feedback; it's taken awhile to get back to this. > On permissions, I had checked/changed permissions previously but > re-checked and found a missed one in > /python3.5/site-packages/usb/backend- happened to be libusb1.pywhich > was flagged - all fixed now > I had also not checked the /dev/*USB* but did and gave necessary > permissions > > pi@raspi3:~/.local/lib/python3.5/site-packages/usb $ ls -l > total 132 > drwxrwxrwx 3 pi pi 4096 Jan 20 13:31 backend > -rwxrwxrwx 1 pi pi 8739 Jan 20 13:31 control.py > -rwxrwxrwx 1 pi pi 46704 Jan 20 13:31 core.py > -rwxrwxrwx 1 pi pi 3215 Jan 20 13:31 _debug.py > -rwxrwxrwx 1 pi pi 3550 Jan 20 13:31 __init__.py > -rwxrwxrwx 1 pi pi 3522 Jan 20 13:31 _interop.py > -rwxrwxrwx 1 pi pi 12588 Jan 20 13:31 legacy.py > -rwxrwxrwx 1 pi pi 6788 Jan 20 13:31 libloader.py > -rwxrwxrwx 1 pi pi 3259 Jan 20 13:31 _lookup.py > -rwxrwxrwx 1 pi pi 5287 Jan 20 13:31 _objfinalizer.py > drwxrwxrwx 2 pi pi 4096 Jan 20 13:31 __pycache__ > -rwxrwxrwx 1 pi pi 12291 Jan 20 13:31 util.py > > pi@raspi3:~/.local/lib/python3.5/site-packages/usb/backend $ ls -l > total 108 > -rwxrwxrwx 1 pi pi 16048 Jan 20 13:31 __init__.py > -rwxrwxrwx 1 pi pi 23783 Jan 20 13:31 libusb0.py > -rwxrwxrwx 1 pi pi 35299 Jan 20 13:31 libusb1.py > -rwxrwxrwx 1 pi pi 28019 Jan 20 13:31 openusb.py > drwxrwxrwx 2 pi pi 4096 Jan 20 13:31 __pycache__ > pi@raspi3:~/.local/lib/python3.5/site-packages/usb/backend $ cd > __pycache__ > pi@raspi3:~/.local/lib/python3.5/site-packages/usb/backend/__pycache__ > $ ls -l > total 76 > -rwxrwxrwx 1 pi pi 16140 Jan 20 13:31 __init__.cpython-35.pyc > -rwxrwxrwx 1 pi pi 15006 Jan 20 13:31 libusb0.cpython-35.pyc > -rwxrwxrwx 1 pi pi 23713 Jan 20 13:31 libusb1.cpython-35.pyc > -rwxrwxrwx 1 pi pi 18216 Jan 20 13:31 openusb.cpython-35.pyc > pi@raspi3:~/.local/lib/python3.5/site-packages/usb/backend/__pycache__ $ > > still get the same error diagnostic which still ends > usb.core.USBError: [Errno 13] Access denied (insufficient permissions)" > Traceback (most recent call last): > File "/home/pi/usb1.py", line 12, in <module> > dev.set_configuration() > File "/home/pi/.local/lib/python3.5/site-packages/usb/core.py", line > 869, in set_configuration > self._ctx.managed_set_configuration(self, configuration) > File "/home/pi/.local/lib/python3.5/site-packages/usb/core.py", line > 102, in wrapper > return f(self, *args, **kwargs) > File "/home/pi/.local/lib/python3.5/site-packages/usb/core.py", line > 147, in managed_set_configuration > self.managed_open() > File "/home/pi/.local/lib/python3.5/site-packages/usb/core.py", line > 102, in wrapper > return f(self, *args, **kwargs) > File "/home/pi/.local/lib/python3.5/site-packages/usb/core.py", line > 120, in managed_open > self.handle = self.backend.open_device(self.dev) > File > "/home/pi/.local/lib/python3.5/site-packages/usb/backend/libusb1.py", > line 786, in open_device > return _DeviceHandle(dev) > File > "/home/pi/.local/lib/python3.5/site-packages/usb/backend/libusb1.py", > line 643, in __init__ > _check(_lib.libusb_open(self.devid, byref(self.handle))) > File > "/home/pi/.local/lib/python3.5/site-packages/usb/backend/libusb1.py", > line 595, in _check > raise USBError(_strerror(ret), ret, _libusb_errno[ret]) > usb.core.USBError: [Errno 13] Access denied (insufficient permissions) > so basically no change. > > Now the interesting bit. I tried running as root > root@raspi3:/home/pi/PyProj# python3.5 pyusb_1.py > Traceback (most recent call last): > File "pyusb_1.py", line 2, in <module> > import usb.core > ImportError: No module named 'usb' > > same result if I simply sudo python3.5 pyusb_1.py > > when I run python3.5 from the terminal and get the python >>> prompt > there is no trouble with 'import' and checking with 'help(usb)' shows > the module is there and accessible. > > Interesting though is that I have the same problem on all linux, so > whatever I did wrong I did it each time. I have tried installing pyusb > with PIP and sudo apt-get but it makes no difference. > > The further I go with this the darker the tunnel gets. > > Cheers > Charles > > On Sat, 19 Jan 2019 at 09:23, Sergio A. Quiroga > <ser...@gm... <mailto:ser...@gm...>> wrote: > > i saw this message: > > usb.core.USBError: [Errno 13] Access denied (insufficient > permissions) > > > when i was using a wrong driver in Windows 10. I could also see > the whole usb device descriptor, just could not interact with it. > > my suggestion is to try to re install or update the libusb driver > > On Thu, Jan 17, 2019 at 9:01 PM charles wilson > <cmf...@gm... <mailto:cmf...@gm...>> wrote: > > Hi, > I usually manage to solve my problems by hitting my head > against them until I get a breakthrough. This time nothing. > I am new to trying PYUSB. I have the same problem with 2 > installations. > 1) Ubuntu Mate 16.04 on Kernel Linux 4.15.0-43-generic > x86_64running on AMD Ryzen 5 2600X > 2) Raspbian (Jessie) on Raspberry Pi 3B+ > > Also I confirm that libusb-1.0-0 > <https://pkgs.org/download/libusb-1.0-0> is there on both. > > After installation I started the tutorial (why not?) but did > not get far: > > import usb.core > import usb.util > > dev = usb.core.find(idVendor=0x1d6b, idProduct=0x0003) > print(dev) > /OK so far and I get:/ > / > ================== RESTART: /home/wilson/temPY/USBtest01.py > ================== > DEVICE ID 1d6b:0003 on Bus 004 Address 001 ================= > bLength : 0x12 (18 bytes) > bDescriptorType : 0x1 Device > bcdUSB : 0x300 USB 3.0 > bDeviceClass : 0x9 Hub > bDeviceSubClass : 0x0 > bDeviceProtocol : 0x3 > bMaxPacketSize0 : 0x9 (9 bytes) > idVendor : 0x1d6b > idProduct : 0x0003 > bcdDevice : 0x415 Device 4.15 > iManufacturer : 0x3 Error Accessing String > iProduct : 0x2 Error Accessing String > iSerialNumber : 0x1 Error Accessing String > bNumConfigurations : 0x1 > CONFIGURATION 1: 0 mA ==================================== > bLength : 0x9 (9 bytes) > bDescriptorType : 0x2 Configuration > wTotalLength : 0x1f (31 bytes) > bNumInterfaces : 0x1 > bConfigurationValue : 0x1 > iConfiguration : 0x0 > bmAttributes : 0xe0 Self Powered, Remote Wakeup > bMaxPower : 0x0 (0 mA) > INTERFACE 0: Hub ======================================= > bLength : 0x9 (9 bytes) > bDescriptorType : 0x4 Interface > bInterfaceNumber : 0x0 > bAlternateSetting : 0x0 > bNumEndpoints : 0x1 > bInterfaceClass : 0x9 Hub > bInterfaceSubClass : 0x0 > bInterfaceProtocol : 0x0 > iInterface : 0x0 > ENDPOINT 0x81: Interrupt IN ========================== > bLength : 0x7 (7 bytes) > bDescriptorType : 0x5 Endpoint > bEndpointAddress : 0x81 IN > bmAttributes : 0x3 Interrupt > wMaxPacketSize : 0x4 (4 bytes) > bInterval : 0xc > / > / > / > which tells me that pyusb is installed and is finding USB.core > and seems to be working. > When I take the next step in the tutorial: > dev.set_configuration() > > it all turns to custard and I get: > > raceback (most recent call last): > File "/home/wilson/temPY/USBtest01.py", line 11, in <module> > dev.set_configuration() > File "/usr/lib/python3/dist-packages/usb/core.py", line 799, > in set_configuration > self._ctx.managed_set_configuration(self, configuration) > File "/usr/lib/python3/dist-packages/usb/core.py", line 127, > in managed_set_configuration > self.managed_open() > File "/usr/lib/python3/dist-packages/usb/core.py", line 105, > in managed_open > self.handle = self.backend.open_device(self.dev) > File > "/usr/lib/python3/dist-packages/usb/backend/libusb1.py", line > 722, in open_device > return _DeviceHandle(dev) > File > "/usr/lib/python3/dist-packages/usb/backend/libusb1.py", line > 600, in __init__ > _check(_lib.libusb_open(self.devid, byref(self.handle))) > File > "/usr/lib/python3/dist-packages/usb/backend/libusb1.py", line > 552, in _check > raise USBError(_strerror(ret), ret, _libusb_errno[ret]) > usb.core.USBError: [Errno 13] Access denied (insufficient > permissions) > > This on the AMD system, the diagnostic on the Raspi is similar > but not identical. > > I have worked through the other similar postings on the > mailing list - while similar their problems were at a more > complex level --- I am at step 1 with the tutorial ... > I have also worked through the occurrences of > set_configuration() in the ...usb/core.py module and could see > no reason for dev.set_configuration() to bomb-out. > > I have racked my brains and consulted my local gurus with no > joy .... so any help would be appreciated - I have a feeling > it is something dumb that I have missed. > > Cheers > Charles > > > > _______________________________________________ > pyusb-users mailing list > pyu...@li... > <mailto:pyu...@li...> > https://lists.sourceforge.net/lists/listinfo/pyusb-users > > > > -- > SQ > _______________________________________________ > pyusb-users mailing list > pyu...@li... > <mailto:pyu...@li...> > https://lists.sourceforge.net/lists/listinfo/pyusb-users > > > > _______________________________________________ > pyusb-users mailing list > pyu...@li... > https://lists.sourceforge.net/lists/listinfo/pyusb-users |