usb

问题 I have a USB HID device that can work in two different modes. The selection of modes is based on the sequence of USB enumeration/initialization packets sent to it. I am using a Raspberry Pi 3 running Raspbian, however I also see the same issue if I compile my code for my desktop Ubuntu distro. The issue I have is that linux is recognizing the USB device as a HID device and then sending the sequence of commands that it deems necessary to start the device, and this works correctly and starts

问题 I am new to Android and just started working with Android 4.0.3. which enables USB Host connection. I'm trying to send some signal via USB to a camera, let's say it is supposed to be some characters that the camera has to receive and e.g. start recording. I wanted to do it via controlTransfer(), but I am unable to understand what each part of the logic of this method means. I've checked many fora, but everywhere I see it people keep refering to it as if it was obvious. What is the request ID,

问题 I have a Lollipop based android box. The box has a USB port similarly to micro USB port in Android phones. I want to check if any host is connected to the USB port with the android box in device mode similarly to when a phone is connected to a PC. At the minimum, I just need to check if something is connected to this USB port and at best get some info(manufacturer, model, serial) of the host connected. I don't need any data communication. I have tried UsbManager manager = (UsbManager)

问题 I have 2 Android devices, which I would like to connect with a USB OTG cable and have back-and-forth communication between the two devices. From what I understand, one Android device will act as the USB Host (Nexus 7 running 4.4) and the other Android device will act as a USB Accessory (Galaxy Nexus running 4.2.2). I've tried googling around for an answer, but I can only seem to find articles explaining how to connect an Android device to a USB accessory (like a USB mouse or keyboard), not

问题 I want to analyze usb communication out of my device: SGS4. I see everywhere that the usbmon is needed to be configured and compiled into the kernel. Afaik, this module is not built in the android linux system. I don't have much experience in compiling a kernel but if this is necessary I would do it. Can you tell what are the steps of doing so? i.e. how to compile the linux kernel for android such that it would include the usbmon module. 回答1: I suppose you have access to: the sources of the

问题 I am using the PCSC driver and the javax.smartcardio library as the wrapper to the driver. I have 3 ACR122U devices plugged into a Linux (debian) system. I have ran udevadm info on the devices and they all have a serial number of 0. I need to identify which reader is which in my class. I can check which topological usb port is used by parsing the /sys/devices folder but I still cant "select" a device in the Java api. Does anyone know a way to modify the PCSC device stack order or something.

问题 I know that it was supported starting Android 3.1, i mean "how to check hardware support" 回答1: See: http://developer.android.com/reference/android/content/pm/PackageManager.html#FEATURE_USB_HOST context.getPackageManager().hasSystemFeature( PackageManager.FEATURE_USB_HOST); 回答2: I had the same question and after some googling I found this: http://android.serverbox.ch/?p=549 In summary, your app needs to use the UsbManager system service and enumerate through attached USB devices. mUsbManager

问题 I am new to Azure, I want to connect my local USB port to Azure VM (for debugging apps), how can I do this? If I can connect local USB (USB of my PC) to Azure VM , I can make 100% use of Azure as PC, and I can run apps without any problem. Please help out doing this. 回答1: simply right click on the rdp file and click on edit and select local resource there you can find option called ports 回答2: Expanding on the answer above - you can also configure under Drives the option so that all new USBs

问题 I'm trying to write little program which will be able to read some informations about REMOVEABLE_DEVICE (USB). I've tried pyusb but I was not able to pull data I need. I would like to read from the system the name of the USB device. In this format: USB Flash Memory - this is the model information Removable Disk (H:) - this is the name of device Generic Flash Disk USB DISK (F:) Lexar USB Flash Drive Lexar (I:) I am able to get the model information with win32com.client library, inspired from

问题 I forgot my WD Passport Ultra disk's hardware encryption password and I am having a Delphi software being programmed for finding this password using brute force method. Original WD Security software will be used for password entries, but WD Security software locks itself at every 5 wrong password entries. Then the drive needs to be physically ejected and plugged in to reset this counter. Therefore the software being programmed must emulate safely removing and plugging in of an external USB