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4d402194dc
The existing tud_midi_n_stream_read() accepts a cable_num parameter but ignores it — all cables share a single FIFO and stream parser state, so data from different virtual cables is silently mixed together. Add tud_midi_n_demux_stream_read() which returns the cable number of the data that was actually read. It peeks at each USB-MIDI event packet header before consuming it and stops when the next packet belongs to a different cable, allowing callers to dispatch per-cable without losing data. Implementation details: - Mirrors the host-side tuh_midi_stream_read() approach: tu_edpt_stream_peek for cable inspection, CIN-based byte count (USB MIDI 1.0 Table 4-1), leftover handling via existing midi_driver_stream_t - *p_cable_num initialized to 0xff sentinel so callers can detect "no data" even when return value is 0 - Cable-change check (total_read > 0 guard) covers both leftover-originated reads and freshly consumed packets - TU_VERIFY uses explicit != NULL comparisons, consistent with codebase style - Note: shares stream->buffer with tud_midi_n_stream_read(); do not mix calls on the same interface - Adds single-interface convenience wrapper tud_midi_demux_stream_read() Closes #1838
TinyUSB
=======
|Build Status| |CircleCI Status| |Documentation Status| |Static Analysis| |Fuzzing Status| |Membrowse| |License|
Sponsors
--------
TinyUSB is funded by: Adafruit. Purchasing products from them helps to support this project.
.. figure:: docs/assets/adafruit_logo.svg
:alt: Adafruit Logo
:align: left
:target: https://www.adafruit.com
.. raw:: html
<div class="clear-both"></div>
Overview
--------
.. figure:: docs/assets/logo.svg
:alt: TinyUSB
:align: left
.. raw:: html
<div class="clear-both"></div>
TinyUSB is an open-source cross-platform USB Host/Device stack for embedded systems. It’s designed for memory safety
(no dynamic allocation) and thread safety (all interrupts deferred to non-ISR task functions). The stack emphasizes portability,
small footprint, and real-time performance across 50+ MCU families.
Key Features
------------
* **Thread-safe:** USB interrupts deferred to task context
* **Memory-safe:** No dynamic allocation, all buffers static
* **Portable:** Supports 50+ MCU families
* **Comprehensive:** Includes CDC, HID, MSC, Audio, and Host support
* **RTOS-friendly:** Works with bare metal, FreeRTOS, RT-Thread, and Mynewt
.. figure:: docs/assets/stack.svg
:width: 500px
:align: left
:alt: stackup
.. raw:: html
<div class="clear-both"></div>
::
.
├── docs # Documentation
├── examples # Examples with make and cmake build system
├── 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 # Tests: unit test, fuzzing, hardware test
└── tools # Files used internally
Getting started
---------------
See the `online documentation <https://docs.tinyusb.org>`_ for information about using TinyUSB and how it is implemented.
Check out `Getting Started`_ guide for adding TinyUSB to your project or building the examples. If you are new to TinyUSB, we recommend starting with the ``cdc_msc`` example. There is a handful of `Supported Boards`_ that should work out of the box.
We use `GitHub Discussions <https://github.com/hathach/tinyusb/discussions>`_ as our forum. It is a great place to ask questions and advice from the community or to discuss your TinyUSB-based projects.
For bugs and feature requests, please `raise an issue <https://github.com/hathach/tinyusb/issues>`_ and follow the templates there.
See `Porting`_ guide for adding support for new MCUs and boards.
Device Stack
------------
Supports multiple device configurations by dynamically changing USB descriptors, low power functions such like suspend, resume, and remote wakeup. The following device classes are supported:
- Audio Class 2.0 (UAC2)
- Bluetooth Host Controller Interface (BTH HCI)
- Communication Device Class (CDC)
- Device Firmware Update (DFU): DFU mode (WIP) and Runtime
- Human Interface Device (HID): Generic (In & Out), Keyboard, Mouse, Gamepad etc ...
- Mass Storage Class (MSC): with multiple LUNs
- Musical Instrument Digital Interface (MIDI)
- Media Transfer Protocol (MTP/PTP)
- Network with RNDIS, Ethernet Control Model (ECM), Network Control Model (NCM)
- Test and Measurement Class (USBTMC)
- Video class 1.5 (UVC): work in progress
- Vendor-specific class support with generic In & Out endpoints. Can be used with MS OS 2.0 compatible descriptor to load winUSB driver without INF file.
- `WebUSB <https://github.com/WICG/webusb>`__ with vendor-specific class
If you have a special requirement, ``usbd_app_driver_get_cb()`` can be used to write your own class driver without modifying the stack. Here is how the RPi team added their reset interface `raspberrypi/pico-sdk#197 <https://github.com/raspberrypi/pico-sdk/pull/197>`_
Host Stack
----------
- Communication Device Class: CDC-ACM
- Vendor serial over USB: FTDI, CP210x, CH34x, PL2303
- Human Interface Device (HID): Keyboard, Mouse, Generic
- Mass Storage Class (MSC)
- Musical Instrument Digital Interface (MIDI)
- Hub with multiple-level support
Similar to the Device Stack, if you have a special requirement, ``usbh_app_driver_get_cb()`` can be used to write your own class driver without modifying the stack.
Power Delivery Stack
--------------------
- Power Delivery 3.0 (PD3.0) with USB Type-C support (WIP)
- Super early stage, only for testing purpose
- Only support STM32 G4
OS Abstraction layer
--------------------
TinyUSB is completely thread-safe by pushing all Interrupt Service Request (ISR) events into a central queue, then processing them later in the non-ISR context task function. It also uses semaphore/mutex to access shared resources such as Communication Device Class (CDC) FIFO. Therefore the stack needs to use some of the OS's basic APIs. Following OSes are already supported out of the box.
- **No OS**
- **FreeRTOS**
- `RT-Thread <https://github.com/RT-Thread/rt-thread>`_: `repo <https://github.com/RT-Thread-packages/tinyusb>`_
- **Mynewt** Due to the newt package build system, Mynewt examples are better to be on its `own repo <https://github.com/hathach/mynewt-tinyusb-example>`_
Supported CPUs
--------------
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Manufacturer | Family | Device | Host | Highspeed | Driver | Note |
+==============+=============================+========+======+===========+========================+====================+
| Allwinner | F1C100s/F1C200s | ✔ | | ✔ | sunxi | musb variant |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Analog | MAX3421E | | ✔ | ✖ | max3421 | via SPI |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | MAX32 650, 666, 690, | ✔ | | ✔ | musb | 1-dir ep |
| | MAX78002 | | | | | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Artery AT32 | F403a_407, F413 | ✔ | | | fsdev | 512 USB RAM |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | F415, F435_437, F423, | ✔ | ✔ | | dwc2 | |
| | F425, F45x | | | | | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | F402_F405 | ✔ | ✔ | ✔ | dwc2 | F405 is HS |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Bridgetek | FT90x | ✔ | | ✔ | ft9xx | 1-dir ep |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Broadcom | BCM2711, BCM2837 | ✔ | | ✔ | dwc2 | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Dialog | DA1469x | ✔ | ✖ | ✖ | da146xx | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Espressif | S2, S3 | ✔ | ✔ | ✖ | dwc2 | |
| ESP32 +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | P4 | ✔ | ✔ | ✔ | dwc2 | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | H4 | ✔ | ✔ | ✖ | dwc2 | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| GigaDevice | GD32VF103 | ✔ | | ✖ | dwc2 | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| HPMicro | HPM6750 | ✔ | ✔ | ✔ | ci_hs, ehci | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Infineon | XMC4500 | ✔ | ✔ | ✖ | dwc2 | |
+--------------+-----+-----------------------+--------+------+-----------+------------------------+--------------------+
| MicroChip | SAM | D11, D21, L21, L22 | ✔ | | ✖ | samd | |
| | +-----------------------+--------+------+-----------+------------------------+--------------------+
| | | D51, E5x | ✔ | | ✖ | samd | |
| | +-----------------------+--------+------+-----------+------------------------+--------------------+
| | | G55 | ✔ | | ✖ | samg | 1-dir ep |
| | +-----------------------+--------+------+-----------+------------------------+--------------------+
| | | E70,S70,V70,V71 | ✔ | | ✔ | samx7x | 1-dir ep |
| +-----+-----------------------+--------+------+-----------+------------------------+--------------------+
| | PIC | 24 | ✔ | | | pic | ci_fs variant |
| | +-----------------------+--------+------+-----------+------------------------+--------------------+
| | | 32 mm, mk, mx | ✔ | | | pic | ci_fs variant |
| | +-----------------------+--------+------+-----------+------------------------+--------------------+
| | | dsPIC33 | ✔ | | | pic | ci_fs variant |
| | +-----------------------+--------+------+-----------+------------------------+--------------------+
| | | 32mz | ✔ | | | pic32mz | musb variant |
+--------------+-----+-----------------------+--------+------+-----------+------------------------+--------------------+
| MindMotion | mm32 | ✔ | | ✖ | mm32f327x_otg | ci_fs variant |
+--------------+-----+-----------------------+--------+------+-----------+------------------------+--------------------+
| NordicSemi | nRF 52833, 52840, 5340 | ✔ | ✖ | ✖ | nrf5x | only ep8 is ISO |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Nuvoton | NUC120 | ✔ | ✖ | ✖ | nuc120 | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | NUC121/NUC125, NUC126 | ✔ | ✖ | ✖ | nuc121 | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | NUC505 | ✔ | | ✔ | nuc505 | |
+--------------+---------+-------------------+--------+------+-----------+------------------------+--------------------+
| NXP | iMXRT | RT 10xx, 11xx | ✔ | ✔ | ✔ | ci_hs, ehci | |
| +---------+-------------------+--------+------+-----------+------------------------+--------------------+
| | Kinetis | KL | ✔ | ⚠ | ✖ | ci_fs, khci | |
| | +-------------------+--------+------+-----------+------------------------+--------------------+
| | | K32L2 | ✔ | | ✖ | khci | ci_fs variant |
| +---------+-------------------+--------+------+-----------+------------------------+--------------------+
| | LPC | 11u, 13, 15 | ✔ | ✖ | ✖ | lpc_ip3511 | |
| | +-------------------+--------+------+-----------+------------------------+--------------------+
| | | 17, 40 | ✔ | ⚠ | ✖ | lpc17_40, ohci | |
| | +-------------------+--------+------+-----------+------------------------+--------------------+
| | | 18, 43 | ✔ | ✔ | ✔ | ci_hs, ehci | |
| | +-------------------+--------+------+-----------+------------------------+--------------------+
| | | 51u | ✔ | ✖ | ✖ | lpc_ip3511 | |
| | +-------------------+--------+------+-----------+------------------------+--------------------+
| | | 54, 55 | ✔ | | ✔ | lpc_ip3511 | |
| +---------+-------------------+--------+------+-----------+------------------------+--------------------+
| | MCX | N9 | ✔ | | ✔ | ci_fs, ci_hs, ehci | |
| | +-------------------+--------+------+-----------+------------------------+--------------------+
| | | A15 | ✔ | | | ci_fs | |
| +---------+-------------------+--------+------+-----------+------------------------+--------------------+
| | RW61x | ✔ | ✔ | ✔ | ci_hs, ehci | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Raspberry Pi | RP2040, RP2350 | ✔ | ✔ | ✖ | rp2040, pio_usb | |
+--------------+-----+-----------------------+--------+------+-----------+------------------------+--------------------+
| Renesas | RX | 63N, 65N, 72N | ✔ | ✔ | ✖ | rusb2 | |
| +-----+-----------------------+--------+------+-----------+------------------------+--------------------+
| | RA | 4M1, 4M3, 6M1 | ✔ | ✔ | ✖ | rusb2 | |
| | +-----------------------+--------+------+-----------+------------------------+--------------------+
| | | 6M5 | ✔ | ✔ | ✔ | rusb2 | |
+--------------+-----+-----------------------+--------+------+-----------+------------------------+--------------------+
| Silabs | EFM32GG12 | ✔ | | ✖ | dwc2 | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| Sony | CXD56 | ✔ | ✖ | ✔ | cxd56 | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| ST STM32 | F0, F3, L0, L1, L5, WBx5 | ✔ | ✖ | ✖ | stm32_fsdev | |
| +----+------------------------+--------+------+-----------+------------------------+--------------------+
| | F1 | 102, 103 | ✔ | ✖ | ✖ | stm32_fsdev | 512 USB RAM |
| | +------------------------+--------+------+-----------+------------------------+--------------------+
| | | 105, 107 | ✔ | ✔ | ✖ | dwc2 | |
| +----+------------------------+--------+------+-----------+------------------------+--------------------+
| | F2, F4, F7, H7, H7RS | ✔ | ✔ | ✔ | dwc2 | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | C0, G0, H5, U3 | ✔ | ✔ | ✖ | stm32_fsdev | 2KB USB RAM |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | G4 | ✔ | ✖ | ✖ | stm32_fsdev | 1KB USB RAM |
| +----+------------------------+--------+------+-----------+------------------------+--------------------+
| | L4 | 4x2, 4x3 | ✔ | ✖ | ✖ | stm32_fsdev | 1KB USB RAM |
| | +------------------------+--------+------+-----------+------------------------+--------------------+
| | | 4x5, 4x6, 4+ | ✔ | ✔ | ✖ | dwc2 | |
| +----+------------------------+--------+------+-----------+------------------------+--------------------+
| | N6 | ✔ | ✔ | ✔ | dwc2 | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | U0 | ✔ | ✖ | ✖ | stm32_fsdev | 1KB USB RAM |
| +----+------------------------+--------+------+-----------+------------------------+--------------------+
| | U5 | 535, 545 | ✔ | ✔ | ✖ | stm32_fsdev | 2KB USB RAM |
| | +------------------------+--------+------+-----------+------------------------+--------------------+
| | | 575, 585 | ✔ | ✔ | ✖ | dwc2 | |
| | +------------------------+--------+------+-----------+------------------------+--------------------+
| | | 59x,5Ax,5Fx,5Gx | ✔ | ✔ | ✔ | dwc2 | |
+--------------+----+------------------------+--------+------+-----------+------------------------+--------------------+
| TI | MSP430 | ✔ | ✖ | ✖ | msp430x5xx | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | MSP432E4, TM4C123 | ✔ | | ✖ | musb | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| ValentyUSB | eptri | ✔ | ✖ | ✖ | eptri | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| WCH | CH32F20x | ✔ | | ✔ | ch32_usbhs | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | CH32V20x | ✔ | | ✖ | stm32_fsdev/ch32_usbfs | |
| +-----------------------------+--------+------+-----------+------------------------+--------------------+
| | CH32V305, CH32V307 | ✔ | | ✔ | ch32_usbfs/hs | |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
Table Legend
^^^^^^^^^^^^
========= =========================
✔ Supported
⚠ Partial support
✖ Not supported by hardware
\[empty\] Unknown
========= =========================
Development Tools
-----------------
The following tools are provided freely to support the development of the TinyUSB project:
- `IAR Build Tools (CX) <https://iar.com>`_ Professional IDE and compiler for embedded development.
- `JetBrains CLion <https://www.jetbrains.com/clion/>`_ Cross-platform IDE for C and C++ development.
- `PVS-Studio <https://pvs-studio.com/en/pvs-studio/?utm_source=website&utm_medium=github&utm_campaign=open_source>`_ static analyzer for C, C++, C#, and Java code.
.. |Build Status| image:: https://github.com/hathach/tinyusb/actions/workflows/build.yml/badge.svg
:target: https://github.com/hathach/tinyusb/actions/workflows/build.yml
.. |CircleCI Status| image:: https://dl.circleci.com/status-badge/img/circleci/4AYHvUhFxdnY4rA7LEsdqW/QmrpoL2AjGqetvFQNqtWyq/tree/master.svg?style=svg
:target: https://dl.circleci.com/status-badge/redirect/circleci/4AYHvUhFxdnY4rA7LEsdqW/QmrpoL2AjGqetvFQNqtWyq/tree/master
.. |Documentation Status| image:: https://readthedocs.org/projects/tinyusb/badge/?version=latest
:target: https://docs.tinyusb.org/en/latest/?badge=latest
.. |Static Analysis| image:: https://github.com/hathach/tinyusb/actions/workflows/static_analysis.yml/badge.svg
:target: https://github.com/hathach/tinyusb/actions/workflows/static_analysis.yml
.. |Fuzzing Status| image:: https://oss-fuzz-build-logs.storage.googleapis.com/badges/tinyusb.svg
:target: https://oss-fuzz-build-logs.storage.googleapis.com/index.html#tinyusb
.. |Membrowse| image:: https://membrowse.com/badge.svg
:target: https://membrowse.com/public/hathach/tinyusb
.. |License| image:: https://img.shields.io/badge/license-MIT-brightgreen.svg
:target: https://opensource.org/licenses/MIT
.. _Changelog: docs/info/changelog.rst
.. _Contributors: CONTRIBUTORS.rst
.. _Getting Started: docs/getting_started.rst
.. _Supported Boards: docs/reference/boards.rst
.. _Dependencies: docs/reference/dependencies.rst
.. _Concurrency: docs/reference/concurrency.rst
.. _Code of Conduct: CODE_OF_CONDUCT.rst
.. _Porting: docs/porting.rst