Skip to content
An open source cross-platform USB stack for embedded system
Branch: master
Clone or download
Latest commit b041b23 Jul 22, 2019


Build Status License

TinyUSB is an open-source cross-platform USB Host/Device stack for embedded system. It is designed to be memory-safe with no dynamic allocation and thread-safe with all interrupt events are deferred then handled in the stack's task function.


├── docs            # Documentation
├── examples        # Sample with Makefile and Segger Embedded build support
├── hw
│   ├── bsp         # Supported boards source files
│   └── mcu         # Low level mcu core & peripheral drivers
├── lib             # Sources from 3rd party such as freeRTOS, fatfs ...
├── src             # All sources files for TinyUSB stack itself.
├── test            # Unit tests for the stack
└── tools           # Files used internally

Device Stack

Support multiple device configurations by dynamically changing usb descriptors. Low power functions such as suspend, resume and remote wakeup. Following device classes are supported:

  • Communication Class (CDC)
  • Human Interface Device (HID): Generic (In & Out), Keyboard, Mouse, Gamepad etc ...
  • Mass Storage Class (MSC): with multiple LUNs
  • Musical Instrument Digital Interface (MIDI)

Host Stack

Most active development is on the Device stack. The Host stack is under rework and largely untested.

  • Human Interface Device (HID): Keyboard, Mouse, Generic
  • Mass Storage Class (MSC)
  • Hub currently only support 1 level of hub (due to my laziness)

OS Abtraction layer

Currently the following OS are supported with tinyusb out of the box with a simple change of CFG_TUSB_OS macro.

  • No OS
  • FreeRTOS
  • MyNewt (work in progress)

Supported MCUs

The stack supports the following MCUs

  • Nordic: nRF52840
  • NXP: LPC11Uxx, LPC13xx, LPC175x_6x, LPC177x_8x, LPC18xx, LPC40xx, LPC43xx
  • MicroChip: SAMD21, SAMD51 (device only)
  • ST: STM32F4 (device only)

Here is the list of supported Boards

Compiler & IDE

The stack is developed with GCC compiler, and should be compilable with others. Folder examples provide Makefile and Segger Embedded Studio build support.

Getting Started

Here is the details for getting started with the stack.


Want to help add TinyUSB support for a new MCU? Read here for an explanation on the low-level API needed by TinyUSB.


MIT license for all TinyUSB sources src folder, Full license is here. However each file is individually licensed especially those in lib and hw/mcu folder. Please make sure you understand all the license term for files you use in your project.


TinyUSB is currently used by these other projects:

If your project also uses TinyUSB and want to share, feel free to create a pull request.

You can’t perform that action at this time.