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Questions - driver

AlliedVision ALVIUM 1800 U-040c not showing as /dev/video0

I have the camera in object connected through USB to my PC (Core i3 with Ubuntu 20.04). dmesg shows me that the camera is correctly connected: [ 2.116714] usb 2-1.2: new SuperSpeed USB device numbe...
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Federico Nardi

linux

camera

usb

driver

alliedvision

Votes: 0

Answers: 1

Latest Answer

Cheese uses Gstreamer, so using the gst-vmbsource plugin could help. https://github.com/alliedvision/gst-vimbasrc This project contains the official GStreamer plugin to make cameras supported by Alli...
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T F

How to pass a char *array (belonging to the user address space) to a tasklet or workqueue in a kernel module?

I’m writing a device driver. If someone calls the write operation I want it to be deferred (using tasklet or workqueue). The code should be something like that: static ssize_t dev_write(struct file *f...
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Silvia di Luise

c

module

linux-kernel

driver

workqueue

Votes: 0

Answers: 1

Latest Answer

Even if it is possible (and there is surely a way), the user process has probably changed the contents of the buffer in the time before deferred_write runs. Notice that user programs often allocate th...
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user253751

I need to track changes to files, but I cannot think of a way

I have an idea that I am working on. I have a windows mini-filter driver that I am trying to create that will virtualize changes to files by certain processes. I am doing this by capturing the writes,...
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S. Tracy

c++

c

windows

kernel

driver

Votes: 0

Answers: 1

Latest Answer

Two solutions: Simply copy the original file to virtualized storage, and use only this file. For small files, it will probably be the best and fastest solution. To give an example, let's say that any...
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Wisblade

How to all C++/WinRT from UMDF2

I develop an UMDF2.0 driver using VS2019. Inside this driver I need to communicate with an BLE device. I have to use BluetoothLEDevice class to do this. This is a WinRT Api. I'm completely lost on how...
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EmbeddedDev

c++

bluetooth-lowenergy

driver

c++-winrt

umdf

Votes: 0

Answers: 1

Latest Answer

You cannot instantiate the BluetoothLEDevice with default constructor because there is no such constructor in this case. Please use this code snippet in instantiate the BT device. #include <winrt/w...
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Prasanna K

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