obdev/v-usb
A Firmware-Only USB implementation for Atmel's AVR Microcontrollers observed · 2026-08-28
Health v2 · maintenance only
77/100
- Activity 99
- Release rhythm 35
- Longevity 100
Flags: no_releases no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 5018
- days_rel: n/a
- days_push: 7
- n_releases_24m: 0
Adoption not part of the score
1310 stars · 262 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
V-USB is a firmware-only USB driver for Atmel AVR microcontrollers, implementing low-speed USB in software without dedicated USB hardware. It ships as a driver library (C and assembly) with examples for building USB devices on small MCUs.
Use cases
- add USB support to an AVR microcontroller without USB hardware
- build a custom HID device on an ATtiny85
- implement low-speed USB in firmware
- make a DIY USB keyboard or gamepad with AVR
- bit-bang USB on a cheap microcontroller
When to choose
- you use an AVR chip lacking a hardware USB peripheral
- you only need low-speed USB (1.5 Mbit/s) such as HID devices
- you want a small, proven, license-free driver for tiny MCUs
When to avoid
- you need high- or full-speed USB throughput
- your target MCU is not an AVR
- you need USB host mode - this is device-side only
Facets
library · maturity maintenance
embedded sdk developer-tools embedded-systems hardware developer-tools embedded cpp c usb-driver avr firmware bit-banging low-speed-usb microcontroller
1 source
- readme: https://github.com/obdev/v-usb · fetched 2026-08-28 · 8854335ad040
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| obdev/v-usb | main | 77 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem