v-usb | USB implementation for Atmel 's AVR Microcontrollers | Change Data Capture library

by obdev C Version: releases/20121206 License: No License

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | v-usb Summary

v-usb is a C library typically used in Utilities, Change Data Capture, Arduino applications. v-usb has no bugs, it has no vulnerabilities and it has medium support. You can download it from GitHub.

This repository contains the source code of the driver (in the usbdrv subdirectory), examples (in the examples) subdirectory and other things you might need when you design a device using V-USB. When you check out this repository, the resulting directory is not equivalent to the source code package which can be downloaded at Some files in the source code package are generated by scripts when the package is created. On the other hand, the scripts which generate source files and the package are not contained in the package itself. If you want to know more about the files and directories, see the file Readme.txt in the top level directory.

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Quality

Security

License

Reuse

Support

v-usb has a medium active ecosystem.

It has 1090 star(s) with 228 fork(s). There are 114 watchers for this library.

It had no major release in the last 6 months.

There are 13 open issues and 8 have been closed. On average issues are closed in 236 days. There are 9 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of v-usb is releases/20121206

Quality

v-usb has no bugs reported.

Security

v-usb has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

v-usb does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

v-usb releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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v-usb Key Features

No Key Features are available at this moment for v-usb.

v-usb Examples and Code Snippets

No Code Snippets are available at this moment for v-usb.

Community Discussions

Trending Discussions on v-usb

Why my HID keyboard doesn't work very well?

USB light sensor (ALS) product or implementation?

QUESTION

Why my HID keyboard doesn't work very well?

Asked 2020-Nov-15 at 12:18

I've just started programming my AtMega8 with using V-USB link: https://www.obdev.at/products/vusb/index.html. I'm trying to make a keyboard witch will be pushing CTRL+ALT. To do this I modified one of the project "HID Keys" link: https://www.obdev.at/products/vusb/hidkeys.html. I added and modified:

...

ANSWER

Answered 2020-Nov-15 at 12:18

The report descriptor in the sample program defines a 2-byte report to represent a single keystroke. The first byte contains 8 bits each representing a key modifier (left ctrl, right alt, left shift etc) and the next byte is an index representing a key usage (key A, key B, key Delete, etc).

You need to logically OR the desired key modifiers in the first byte. The easiest way is to simply add them together. For example, to send Ctrl+Alt+Delete you could code:

Source https://stackoverflow.com/questions/64836123

QUESTION

USB light sensor (ALS) product or implementation?

Asked 2017-Feb-13 at 08:54

I've been looking for a way to retrofit light sensors to my laptops which lack one.

The best specification I've found so far is in the ACPI 3b spec, section 9.2, that details how such a sensor would be implemented. I assume Linux would also follow the spec.

My first question: is there such a device on the market? A small USB dongle that measures light and provides that to the OS. I already have a Spyder i1 that can do this, but it's overkill and large.

Second question: would it be possible to implement this using Arduino and V-USB? If yes, how would one approach the project?

Is it even possible to do this via USB?

Background: a small USB microcontroller and an LED can function decently as a light sensor by measuring LED capacitance, with no other external parts. This is well documented and also tested by myself.

...

ANSWER

Answered 2017-Feb-13 at 08:54

if you have a microcontroller with a USB stack already you can use a photoresistor, photodiode and convert the voltage, resistance,current to a digital signal with the ADC of the uC, see http://www.electronics-tutorials.ws/io/io_4.html there are also ICs available (search for 'ambient light sensor ic') if you don not wnat ot use the ADC there are ICs that can be connected to I2C bus etc

normally sensors are implement USB HID class, see http://www.sensorwiki.org/doku.php/tutorials/building_a_usb_sensor_interface

the linux kernel module (driver) for ambient light sensors is acpi-als.ko or in case of a usb (HID) light sensor hid-sensor-als.ko

http://lxr.free-electrons.com/source/drivers/iio/light/hid-sensor-als.c

( https://github.com/torvalds/linux/blob/master/Documentation/hid/hid-sensor.txt, https://lwn/net/Articles/348576/ ) if you build an own device you have to make it compliant to this driver

there are ready solutions for this (http://www.hughski.com/colorhugals , http://www.yoctopuce.com/EN/products/usb-environmental-sensors/yocto-light-v3 ) but they are really expensive

the windows driver is sensor-hid-class-driver ( https://msdn.microsoft.com/de-de/windows/hardware/drivers/hid/sensor-hid-class-driver).

(https://www.chalk-elec.com/?p=2144 control LCD backlight over HID USB)

Source https://stackoverflow.com/questions/42193636

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install v-usb

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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