usb

问题 I need to interact with an HID device on Android. The problem is that i'm using Qt Android, and i'm not using Java UsbManager classes. Is there any C lib which I can link against in order to communicate with an HID device on Android without having to work with the Java API? I have found this: http://source.android.com/devices/reference/bt__hh_8h_source.html Which seems to be an header that defines HID communication but I can't find the associated lib. Any ideas? Thanks in advance 回答1: I have

问题 I need to interact with an HID device on Android. The problem is that i'm using Qt Android, and i'm not using Java UsbManager classes. Is there any C lib which I can link against in order to communicate with an HID device on Android without having to work with the Java API? I have found this: http://source.android.com/devices/reference/bt__hh_8h_source.html Which seems to be an header that defines HID communication but I can't find the associated lib. Any ideas? Thanks in advance 回答1: I have

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . Improve this question I am running Windows 7 inside Mac OS X with VirtualBox, I used a BLE inside W7 without any problem. Then I used the BLE USB in the Mac, and when I try to use it again in the W& I got this message: Failed to attach the USB device SEGGER J-Link [0100] to the virtual

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . Improve this question I am running Windows 7 inside Mac OS X with VirtualBox, I used a BLE inside W7 without any problem. Then I used the BLE USB in the Mac, and when I try to use it again in the W& I got this message: Failed to attach the USB device SEGGER J-Link [0100] to the virtual

问题 I am trying to write a script in python so I can find in 1 sec the COM number of the USB serial adapter I have plugged to my laptop. What I need is to isolate the COMx port so I can display the result and open putty with that specific port. Can you help me with that? Until now I have already written a script in batch/powershell and I am getting this information but I havent been able to separate the text of the COMx port so I can call the putty program with the serial parameter. I have also

问题 I'm using some legacy code to enumerate ports on my machine: #include <windows.h> #include <devguid.h> #include <setupapi.h> #include <string> #include <iostream> #include <assert.h> bool GetTextProperty( std::string& sProperty, HDEVINFO dev, _SP_DEVINFO_DATA* pDeviceInfoData, DWORD prop ) { char szBuf[MAX_PATH]; DWORD iPropertySize = 0; if (SetupDiGetDeviceRegistryProperty(dev, pDeviceInfoData, prop, 0L, (PBYTE) szBuf, MAX_PATH, &iPropertySize)) { sProperty = szBuf; assert( iPropertySize >=

问题 I have wrote my code that captures videos by my builtin webcam of my MAC using ffmpeg . On local machine, the code works fine. However, I built a docker container of my code, and tried to run it, but I got the following error: error: Command failed: ffmpeg -f avfoundation -framerate 30 -i "0" -target pal-vcd -vf scale=640x480 -flags +global_header -f segment -segment_time 10 -segment_list ../out.csv -segment_format_options movflags=+faststart -reset_timestamps 1 -strftime 1 %Y%m%d-%H%M%S.mp4

问题 I am in need of a way to obtain the IDs of the USB ports (if they exist) in a project I am working on. What we are trying to do is to connect some Asus depth cameras to a Windows-computer by using USB ports and in our application, which makes use of these cameras,to uniquely identify a camera because each camera has some specific information generated for it (some transformation matrices, etc.) and to reload this information for each camera, when we disconnect and reconnect the cameras to the

问题 I've successfully installed pyocd and libusb using powershell core and python 3.8 on windows 10, but when I use python -m pyocd list command, it throws this error: PS C:\Users\mahya> python -m pyocd list 0003915:WARNING:common:STLink and CMSIS-DAPv2 probes are not supported because no libusb library was found. No available debug probes are connected this is the list of installed python libraries: 回答1: You should copy the libusb.dll (libusb dynamic link library) to the path of python

问题 I've been struggling with this for a while now, trying all sorts of things to get this to work. It's my understanding that SetupDiGetDeviceInterfaceDetail is supposed to give the 1784 error the first time around because the sole purpose of calling it the first time is to get RequiredSize set to the right value. The second time it's called, it's supposed to actually work and give me a valid DeviceInterfaceDetailData structure. I'm not sure what is causing this to fail on the second call.