VUSB-AVR

VUSB-AVR is a board definition package for the Arduino IDE, which was put together from already existing projects to simplify the development of USB devices with AVR microcontrollers. It is based on V-USB, which is a software-only implementation of low-speed USB devices for AVR microcontrollers, making it possible to build USB hardware with almost any AVR microcontroller, not requiring any additonal chip. The package includes board definitions for ATtiny44/84/45/85 and ATmega8/168p/328p as well as libraries and example sketches to build CDC, keyboard, mouse and joystick applications.

The package is based on:

• V-USB by Objective Development
• Digistump libraries and examples
• V-USB adaptation by Ralf Beesner
• ATtiny core by David A. Mellis
• ATmega core by Carlos Rodrigues

Installation

• Open Arduino IDE
• Go to File -> Preferences
• Enter the following URL in Additional Boards Manager URLs:

  https://raw.githubusercontent.com/wagiminator/VUSB-AVR/main/archive/package_wagiminator_vusb_avr_index.json
  

• Separate the URLs using a comma ( , ) if you have more than one URL
• Go to Tools -> Board -> Boards Manager...
• Wait for the platform indexes to finish downloading
• Scroll down until you see the AVR-USB entry and click on it
• Click Install.
• After installation is complete close the Boards Manager window

Hardware Setup

A typical wiring is shown below:

The standard connection of D-/D+ to the physical pins of the AVR is shown in the table below:

Software Setup

• Open Arduino IDE
• Go to Tools -> Board -> VUSB AVR and select VUSB-AVR
• Go to Tools and select your CPU and your Programmer
• Connect your programmer to your PC and your board
• Go to Tools -> Burn Bootloader to burn the fuses
• Now you can upload your sketch

For the example sketches go to File -> Examples -> Examples for VUSB-AVR.