2011/10/6 Alexander Eisenhuth <a...@stacom-software.de>: > Hello list, > > I'm trying to communicate with the USB-2001-TC from MC > (http://www.mccdaq.com/usb-data-acquisition/usb-2001-tc.aspx) using > their text based protocol. > > I'm using pyusb 1.0.0 a1 and figured out this script: > > import usb.core > import usb.util > > def first_try(): > > > # find our device > dev = usb.core.find(idVendor = 0x09db, idProduct = 0x00f9) > > # was it found? > if dev is None: > raise ValueError('Device not found') > > # set the active configuration. With no arguments, the first > # configuration will be the active one > dev.set_configuration() > > # get an endpoint instance > cfg = dev.get_active_configuration() > for i in cfg: > print i.bInterfaceNumber > interface_number = i.bInterfaceNumber > > alternate_settting = usb.control.get_interface(dev, interface_number) > intf = usb.util.find_descriptor(cfg, bInterfaceNumber = > interface_number, bAlternateSetting = alternate_settting) > ep = usb.util.find_descriptor( > intf, > # match the first OUT endpoint > custom_match = \ > lambda e: \ > usb.util.endpoint_direction(e.bEndpointAddress) == \ > usb.util.ENDPOINT_OUT > ) > > > assert ep is not None > > # write the data > #ep.write('test') > > > if __name__ == "__main__": > first_try() > > I get a assert exception (ep is none). As I have currently no knowledge > about the USB related parameters of the Device and I'm no USB expert I > don't know what's the problem. > > So any help is very welcome. > > Regards > Alexander > > As I enabled pyusb loggin I get the following output: > ==================================================== > 2011-10-06 03:23:44,906 INFO:usb.core:find(): using backend > "usb.backend.libusb10" > 2011-10-06 03:23:44,910 > DEBUG:usb.backend.libusb10:_LibUSB.enumerate_devices() > 2011-10-06 03:23:44,913 > DEBUG:usb.backend.libusb10:_LibUSB.get_device_descriptor(<usb.backend.libusb10._Device > object at 0x983f8cc>) > 2011-10-06 03:23:44,913 > DEBUG:usb.backend.libusb10:_LibUSB.get_device_descriptor(<usb.backend.libusb10._Device > object at 0x983f96c>) > 2011-10-06 03:23:44,913 > DEBUG:usb.backend.libusb10:_LibUSB.get_device_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>) > 2011-10-06 03:23:44,913 > DEBUG:usb.backend.libusb10:_LibUSB.get_configuration_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0) > 2011-10-06 03:23:44,914 > DEBUG:usb.backend.libusb10:_LibUSB.open_device(<usb.backend.libusb10._Device > object at 0x983f90c>) > 2011-10-06 03:23:44,914 > DEBUG:usb.backend.libusb10:_LibUSB.set_configuration(c_void_p(159873736), 1) > 2011-10-06 03:23:44,939 > DEBUG:usb.backend.libusb10:_LibUSB.get_configuration_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0) > 2011-10-06 03:23:44,940 > DEBUG:usb.backend.libusb10:_LibUSB.get_interface_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0, 0, 0) > 2011-10-06 03:23:44,940 > DEBUG:usb.backend.libusb10:_LibUSB.get_configuration_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0) > 2011-10-06 03:23:44,940 > DEBUG:usb.backend.libusb10:_LibUSB.get_interface_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0, 1, 0) > 2011-10-06 03:23:44,940 > DEBUG:usb.backend.libusb10:_LibUSB.get_configuration_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0) > 2011-10-06 03:23:44,940 > DEBUG:usb.backend.libusb10:_LibUSB.ctrl_transfer(c_void_p(159873736), > 129, 10, 0, 0, 1, 1000) > --> Interface number is: 0 > 2011-10-06 03:23:44,942 > DEBUG:usb.backend.libusb10:_LibUSB.get_interface_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0, 0, 0) > 2011-10-06 03:23:44,943 > DEBUG:usb.backend.libusb10:_LibUSB.get_configuration_descriptor(<usb.backend.libusb10._Device > object at 0x983f90c>, 0) > Traceback (most recent call last): > File "/home/pyseminar/workspace/devel_pyusb/src/test_temp_device.py", > line 44, in <module> > first_try() > File "/home/pyseminar/workspace/devel_pyusb/src/test_temp_device.py", > line 37, in first_try > assert ep is not None > AssertionError > 2011-10-06 03:23:44,947 > DEBUG:usb.backend.libusb10:_LibUSB.close_device(c_void_p(159873736)) >
Please, check your descriptors. If you are in Linux, please post the output of lsusb -vv for you device, or, if you are in Windows, check the ouput of test-libusb-win32 app. -- Best Regards, Wander Lairson Costa https://github.com/walac https://gitorious.org/~walac ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
