You should also check to see that you have appropriate permissions for the device. The instructions here will work on most Linux/Unix systems, which I think includes Mac these days:
First, try accessing it when you're root. If that works, but you can't access it as a default user, find the joystick's entry in the /dev/ directory tree and ll it. It'll probably be listed as owner=root and some group like "usb" Then check to see if you're in group usb, or whatever group the joystick's placed in... If joystick's in (owner,group)=(root,root), you'll need to play with the /etc/udev/rules.d/ files. If its group looks reasonable but you're not in it, you'll need to add yourself to that group. I think the other responders have assumed you're in the appropriate group already, but I didn't see you check that in the original post.... good luck. -Sarah --- On Tue, 9/7/10, Massimo Di Stefano <massimodisa...@gmail.com> wrote: > From: Massimo Di Stefano <massimodisa...@gmail.com> > Subject: [pyusb-users] read data from usb device (joystick) on ossx 10.5.6 - > Access denied (insufficient permissions) > To: pyusb-users@lists.sourceforge.net > Date: Tuesday, September 7, 2010, 6:49 PM > Hello All, > > i'm tring to learn pyusb, i'm on a mac osx 10.6.4 > i buid libusb from source with "log enabled" > googling i tried learn how to read data from an USB device > (a joystick) > i find this code : > > import usb > import usb.core > myVendorId = 1133 > myProductId = 49685 > dev = usb.core.find(idVendor=myVendorId, > idProduct=myProductId) > dev.set_configuration() > test = dev.read(0x81,8) > > but it gives me errors about "permision denied", > se the log : > > > >>> myVendorId = 1133 > >>> myProductId = 49685 > >>> dev = usb.core.find(idVendor=myVendorId, > idProduct=myProductId) > libusb:debug [libusb_get_device_list] > libusb:info [process_new_device] allocating new device for > location 0x1d000000 > libusb:info [process_new_device] found device with address > 1 at 001-05ac-8005-09-00 > libusb:info [process_new_device] allocating new device for > location 0x1d200000 > libusb:info [process_new_device] found device with address > 2 at 002-05ac-021b-00-00 > libusb:info [process_new_device] allocating new device for > location 0x3d000000 > libusb:info [process_new_device] found device with address > 1 at 001-05ac-8005-09-00 > libusb:info [process_new_device] using existing device for > location 0x3d100000 > libusb:info [process_new_device] found device with address > 2 at 002-046d-c215-00-00 > libusb:info [process_new_device] allocating new device for > location 0x5d000000 > libusb:info [process_new_device] found device with address > 1 at 001-05ac-8005-09-00 > libusb:info [process_new_device] allocating new device for > location 0x5d200000 > libusb:info [process_new_device] found device with address > 2 at 002-05ac-8240-00-00 > libusb:info [process_new_device] allocating new device for > location 0x7d000000 > libusb:info [process_new_device] found device with address > 1 at 001-05ac-8005-09-00 > libusb:info [process_new_device] allocating new device for > location 0x7d100000 > libusb:warning [process_new_device] could not retrieve > device descriptor: device not responding. skipping device > libusb:debug [libusb_unref_device] destroy device 104.0 > libusb:info [process_new_device] allocating new device for > location 0xfd000000 > libusb:info [process_new_device] found device with address > 1 at 001-05ac-8006-09-00 > libusb:info [process_new_device] allocating new device for > location 0xfd400000 > libusb:debug [discovered_devs_append] need to increase > capacity > libusb:info [process_new_device] found device with address > 2 at 002-05ac-8501-ff-ff > libusb:debug [libusb_get_device_descriptor] > libusb:debug [libusb_get_device_descriptor] > libusb:debug [libusb_get_device_descriptor] > libusb:debug [libusb_get_device_descriptor] > libusb:debug [libusb_unref_device] destroy device 29.1 > libusb:debug [libusb_unref_device] destroy device 29.2 > libusb:debug [libusb_unref_device] destroy device 61.1 > libusb:debug [libusb_unref_device] destroy device 93.1 > libusb:debug [libusb_unref_device] destroy device 93.2 > libusb:debug [libusb_unref_device] destroy device 125.1 > libusb:debug [libusb_unref_device] destroy device 253.1 > libusb:debug [libusb_unref_device] destroy device 253.2 > libusb:debug [libusb_close] > libusb:debug [usbi_remove_pollfd] remove fd 6 > >>> dev.set_configuration() > libusb:debug [libusb_get_config_descriptor] index 0 > libusb:debug [libusb_open] open 61.2 > libusb:debug [usbi_add_pollfd] add fd 6 events 1 > libusb:info [darwin_open] device open for access > libusb:debug [libusb_set_configuration] configuration 1 > >>> test = dev.read(0x81,8) > libusb:debug [libusb_get_config_descriptor] index 0 > libusb:debug [libusb_get_config_descriptor] index 0 > libusb:debug [libusb_get_config_descriptor] index 0 > libusb:debug [libusb_get_config_descriptor] index 0 > libusb:debug [libusb_claim_interface] interface 0 > libusb:error [darwin_claim_interface] USBInterfaceOpen: > another process has device opened for exclusive access > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File > "/Users/sasha/Downloads/pyusb-1.0.0-a0/usb/core.py", line > 617, in read > self._ctx.managed_claim_interface(self, > intf) > File > "/Users/sasha/Downloads/pyusb-1.0.0-a0/usb/core.py", line > 104, in managed_claim_interface > self.backend.claim_interface(self.handle, i) > File > "/Users/sasha/Downloads/pyusb-1.0.0-a0/usb/_debug.py", line > 53, in do_trace > return f(*args, **named_args) > File > "/Users/sasha/Downloads/pyusb-1.0.0-a0/usb/backend/libusb10.py", > line 461, in claim_interface > > _check(_lib.libusb_claim_interface(dev_handle, intf)) > File > "/Users/sasha/Downloads/pyusb-1.0.0-a0/usb/backend/libusb10.py", > line 353, in _check > raise USBError(_str_error[retval.value]) > usb.core.USBError: Access denied (insufficient > permissions) > >>> > > > have you any clue on what i need to "read data" coming from > such device ? > > the output of : > > system_profiler SPUSBDataType > > is : > > USB: > > USB High-Speed Bus: > > Host Controller Location: Built-in > USB > Host Controller Driver: AppleUSBEHCI > PCI Device ID: 0x27cc > PCI Revision ID: 0x0002 > PCI Vendor ID: 0x8086 > Bus Number: 0xfd > > Built-in iSight: > > Product ID: 0x8501 > Vendor ID: 0x05ac > (Apple Inc.) > Version: 1.89 > Speed: Up to 480 Mb/sec > Manufacturer: Micron > Location ID: 0xfd400000 > Current Available (mA): > 500 > Current Required (mA): > 100 > > USB Bus: > > Host Controller Location: Built-in > USB > Host Controller Driver: AppleUSBUHCI > PCI Device ID: 0x27c8 > PCI Revision ID: 0x0002 > PCI Vendor ID: 0x8086 > Bus Number: 0x1d > > Apple Internal Keyboard / > Trackpad: > > Product ID: 0x021b > Vendor ID: 0x05ac > (Apple Inc.) > Version: 0.18 > Speed: Up to 12 Mb/sec > Manufacturer: Apple > Computer > Location ID: 0x1d200000 > Current Available (mA): > 500 > Current Required (mA): > 40 > > USB Bus: > > Host Controller Location: Built-in > USB > Host Controller Driver: AppleUSBUHCI > PCI Device ID: 0x27c9 > PCI Revision ID: 0x0002 > PCI Vendor ID: 0x8086 > Bus Number: 0x3d > > Logitech Extreme 3D: > > Product ID: 0xc215 > Vendor ID: 0x046d > (Logitech Inc.) > Version: 2.04 > Speed: Up to 1.5 Mb/sec > Manufacturer: Logitech > Location ID: 0x3d100000 > Current Available (mA): > 500 > Current Required (mA): > 30 > > USB Bus: > > Host Controller Location: Built-in > USB > Host Controller Driver: AppleUSBUHCI > PCI Device ID: 0x27ca > PCI Revision ID: 0x0002 > PCI Vendor ID: 0x8086 > Bus Number: 0x5d > > IR Receiver: > > Product ID: 0x8240 > Vendor ID: 0x05ac > (Apple Inc.) > Version: 1.10 > Speed: Up to 12 Mb/sec > Manufacturer: Apple > Computer, Inc. > Location ID: 0x5d200000 > Current Available (mA): > 500 > Current Required (mA): > 100 > > USB Bus: > > Host Controller Location: Built-in > USB > Host Controller Driver: AppleUSBUHCI > PCI Device ID: 0x27cb > PCI Revision ID: 0x0002 > PCI Vendor ID: 0x8086 > Bus Number: 0x7d > > Bluetooth USB Host Controller: > > Product ID: 0x8205 > Vendor ID: 0x05ac > (Apple Inc.) > Version: 19.65 > Speed: Up to 12 Mb/sec > Manufacturer: Apple > Inc. > Location ID: 0x7d100000 > Current Available (mA): > 500 > Current Required (mA): > 0 > > > the device i'm intersted on, is : > > USB Bus: > > Host Controller Location: Built-in > USB > Host Controller Driver: AppleUSBUHCI > PCI Device ID: 0x27c9 > PCI Revision ID: 0x0002 > PCI Vendor ID: 0x8086 > Bus Number: 0x3d > > Logitech Extreme 3D: > > Product ID: 0xc215 > Vendor ID: 0x046d > (Logitech Inc.) > Version: 2.04 > Speed: Up to 1.5 Mb/sec > Manufacturer: Logitech > Location ID: 0x3d100000 > Current Available (mA): > 500 > Current Required (mA): > 30 > > > thanks for any help!!! > > regrads, > > Massimo. > > > > ------------------------------------------------------------------------------ > This SF.net Dev2Dev email is sponsored by: > > Show off your parallel programming skills. > Enter the Intel(R) Threading Challenge 2010. > http://p.sf.net/sfu/intel-thread-sfd > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users > ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. 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