hid

问题 I am attempting to communicate with a rather specific USB device and developing both Windows and Mac code to do so. The device is a USB device with a HID interface (class 3) with two endpoints, an interrupt input and an interrupt output. The nature of the device is such that data is sent out from the device on the input endpoint only when data is requested from the host: the host sends it data which the device responds to on its input interrupt endpoint. Getting data to the device (a write)

问题 I'm trying to create a C# wrapper for a C++ code that reads data from an HID. The code I have been given is pretty straight forward but not complete. Data received from the device is read into the buffer as below: pTmpBuf = (U8 *)calloc( InputReportByteLength, sizeof(U8)); if (ReadFile( hDevice, pTmpBuf, InputReportByteLength, &nRead, NULL)) { memcpy(`pAppBuffer`, pTmpBuf + 1, nRead-1); } I want to parse the data in the pAppBuffer into the struct that is defined as follows: struct BAYER

问题 I'm in the initial stages of developing a companion application to an existing POS program. Basically I'm looking for pin pad like functionality. We have a Targus USB numerical keypad and want this available to the customer to enter a PIN number. (This is NOT for a payment system, just a customer account verification). The main POS program will be running, but I need my application to run in the background and wait for a PIN to be entered which it will then authenticate. Possible Solution #1:

问题 Just a bit of background, I'm working with a raw data stream in Linux Mint (32 bit). It's from my library ruby-buzz, which reads 24-bit lumps out of the data stream file. I've just re-installed my laptop with Linux Mint, 32-bit, and suddenly I'm seeing the error Errno::EINVAL: Invalid argument @ io_fread . ajfaraday@squishy ~ $ sudo chmod 777 /dev/input/by-id/* ajfaraday@squishy ~ $ irb 2.2.1 :001 > path = '/dev/input/by-id/usb-Logitech_Logitech_Buzz_tm__Controller_V1-event-if00' => "/dev

问题 Just a bit of background, I'm working with a raw data stream in Linux Mint (32 bit). It's from my library ruby-buzz, which reads 24-bit lumps out of the data stream file. I've just re-installed my laptop with Linux Mint, 32-bit, and suddenly I'm seeing the error Errno::EINVAL: Invalid argument @ io_fread . ajfaraday@squishy ~ $ sudo chmod 777 /dev/input/by-id/* ajfaraday@squishy ~ $ irb 2.2.1 :001 > path = '/dev/input/by-id/usb-Logitech_Logitech_Buzz_tm__Controller_V1-event-if00' => "/dev

问题 I've created device matching and device removal callbacks, And need to run CFRunLoop to get those callbacks invoked whenever device plugged in and removed. But the problem is, DeviceMatching callback takes a lot of processing time and depends on device to be attached, So I want to detect if device is removed by running the CFRunLoop for a limited time, and With that the device removal callback happens. But, It works for 2 times and then it throws exe_bad_access. IOHIDManagerSetDeviceMatching(

问题 I've got a fairly simple USB HID device that I've been trying to figure out how to read from and write to using Python. I've been able to read from it using PyWinUSB, but the problem comes in when I try to write to it. Trying to write to it makes things explode. For example: device = hid.HidDeviceFilter(vendor_id = 0x0003, product_id = 0x1001).get_devices()[0] This works fine. Then for reading raw data, which is all that I care about right now (I'll work with that once I can figure out how to

问题 I have a node process running under Ubuntu 12.04 LTS as a service (it has a configuration file under /etc/init). The system runs on a headless x86 routerboard to which a barcode reader is connected. What I need to do is be able to read the input from the barcode reader (which behaves like a USB keyboard for all intents and purposes) so that it can be sent to a remote node for processing, but I'd like to avoid having to parse raw HID input. Right now I'm using node-hid but the solution is

问题 I am learning linux hid driver programming, i know how to read a message from hid device but, i am puzzled how to write something to the device ? such as usb hid keyboard, i can use xset or some other program to control the leds of the keyboard, how to archive that? Any tips please! thanks advance. 回答1: USB HID devices are mostly input devices, so they don't usually provide an OUT endpoint (they are allowed by the HID specification but I've never seen one). If an OUT endpoint is not provided,

问题 To use the beagleboard xm as an HID peripheral I plan to do the following: Discover how to build things with angstrom. Get the kernel source 2.6.32. Compile omap_udc and g_hid Insert those modules into the kernel Compile the example from gadget_hid.txt Send keyboard commands with hid_gadget_test /dev/hidg0 keyboard Is that a good way to do what I want? http://www.edaboard.com/thread145675.html is a somewhat related issue from '09. Looking for Example Embedded Linux HID Device Code is very