# tinyusb

## What Is tinyusb

tinyusb is an open-source (BSD-licensed) USB Host/Device/OTG stack for embedded micro-controller. It is developed using [Test-Driven Development (TDD)](tests/readme.md) approach to eliminate bugs as soon as possible.

![tinyusb diagram](/docs/images/what_is_tinyusb.png)

## Features

designed to run out-of-the-box and easy to configure.

### Host

- HID Mouse
- HID Keyboard
- HID Generic (comming soon)
- Communication Device Class (CDC)
- Mass Storage Class (MSC)
- Hub
    - Only support 1 level of hub (due to my laziness)

### Device

- HID Mouse
- HID Keyboard
- HID Generic (comming soon)
- Communication Class (CDC)
- Mass Storage Class (MSC)

### RTOS

tinyusb is designed to be OS-ware and run across RTOS vendors, thanks to its OS Abstraction Layer (OSAL). However, it can also run without an RTOS (OSAL will be expanded to be a state machine in this case). Currently the following OS can be run with tinyusb (out of the box).

- **None OS**
- **FreeRTOS**
- **CMSIS RTX**

## Getting Started

coming soon ...

## Supported Platforms

The stack supports the following MCUs

### NXP
 
  - LPC11uxx
  - LPC13uxx (12 bit ADC)
  - LPC175x_6x
  - LPC43xx

[Here is the list of supported Boards](boards/) in the code base

### Toolchains

You can compile with any of following toolchains

- *lpcxpresso/redsuite*
- *Keil MDK*
- *IAR Workbench*

## Known Issues

- LPC11uxx & LPC13uxx cannot able to STALL Control OUT endpoint !!! --> unsupported with data out request may cause host stuck with control transfer forever. (reproduce: enable keyboard + mouse, return error in set report of hid_device)

## How Can I Help

If you find my little USB stack is useful, please take some time to file any issues that you encountered. It is not necessary to be a software bug, it can be a question, request, suggestion etc. We can consider each github's issue as a forum's topic. Alternatively, you can buy me a cup of coffee if you happen to be in Hochiminh city.

## License

BSD license for most of the code base, but each file is individually licensed especially those in /vendor folder. Please make sure you understand all the license term for files you use in your project. [Full license here](tinyusb/license.md)