Hi, On Windows, for HID devices, I use a dedicated HID library : https://github.com/rene-aguirre/pywinusb Nicolas Le 13/11/2020 à 07:50, John Beamish a écrit : Hi
I am trying to use a USB port to talk to a 18F46K20 pic controller. The project, which is in the early stages, will communicate simple commands to the controller, to get temperature and humidity data from a sensor attached to the controller. I want to use Python to manipulate the results in graphic form. I have read some articles about using PyUSB for interacting with the USB port so I thought I would do some preliminary tests to trial it before I get into the more complex parts. I copied a small program to test it (https://github.com/pyusb/pyusb/blob/master/docs/tutorial.rst) import usb.core import usb.util dev = usb.core.find(idVendor=0x04B3, idProduct=0x310C) if dev is None: raise ValueError('Device not found') print (dev.idProduct,dev.idVendor) dev.set_configuration() The device is an USB optical mouse. Info from USB Device Viewer is at the end of this email. Line 6 outputs 12556 1203 ( which is in decimal). Line 7 produces the following Exception has occurred: USBError [Errno 40] Operation not supported or unimplemented on this platform File "C:\Users\John Beamish\test\usbtest.py", line 7, in <module> dev.set_configuration() I loaded pyusb 1.1.0 with pip install pyusb and libusb1 1.8 with pip install libusb1 I am running Python 3.9 0n Windows 10 Home Version 2004. I know I have/ or am doing something wrong but if anyone is able to advise me I would really appreciate this. This was supposed to be the easy bit!!! Regards John Beamish ---===>Device Information<===--- English product name: "USB Optical Mouse" ConnectionStatus: Current Config Value: 0x01 -> Device Bus Speed: Low Device Address: 0x27 Open Pipes: 1 ===>Device Descriptor<=== bLength: 0x12 bDescriptorType: 0x01 bcdUSB: 0x0200 bDeviceClass: 0x00 -> This is an Interface Class Defined Device bDeviceSubClass: 0x00 bDeviceProtocol: 0x00 bMaxPacketSize0: 0x08 = (8) Bytes idVendor: 0x04B3 = IBM Corporation idProduct: 0x310C _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
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