hathach e02f93158c test/hil: usbtest fleet enablement, shuffled scheduling, unique PIDs
Pool/config:
- record real uids (ra8m1_ek), enable usbtest for espressif s3/p4, then
  park ra6m5_ek and ra8m1_ek in boards-skip (ra6m5's usbtest/MSC traffic
  can kill the uPD720201 host on its ROM firmware; ra8m1 USBHS bring-up
  pending); max32666/nrf54lm20 stay enabled - their MosChip flakiness
  never wedges
- re-enable device/usbtest on HS boards (mimxrt1064, ch32v307) now that
  uPD720201 firmware 2.0.2.6 fixes the command-ring death; mimxrt1015
  stays skipped - its HS battery killed the controller on both ROM and
  2.0.2.6 firmware (board-specific); match the moved host-test bundles
  (f723 <-> rt1064); skip never-passing tests on the new
  nrf5340dk/nrf54lm20dk boards and the detached pico host bundle, each
  documented with a comment

Host-controller quirk gating in usbtest.py (auto-skip, self-heals on a
healthy xHCI):
- MosChip MCS9990 EHCI: case 25 (int-OUT never scheduled, FRINDEX bug)
  and case 11 (unlinked reads complete short/EREMOTEIO)
- Renesas uPD720201 xHCI: firmware-gated. The card must run firmware
  >= 2.0.2.6 (RAM-uploaded - it reverts to ROM on every power cycle):
  on older firmware the command ring dies under unlink stress (a
  Configure Endpoint command stops completing; the hub worker deadlocks
  holding the device lock; only a host power cycle recovers; three
  boards reproduced it). usbtest.py reads the FW version register (PCI
  config 0x6c) and refuses to run at all on older firmware - hil_test
  surfaces that as a failed test with the reason. On current firmware
  the full 30-case battery runs (validated FS+HS: metro_m4, f723,
  f723-DMA all 30/30).

Scheduling (hil_test.py):
- Shuffle each (board, variant)'s test order with a seeded RNG
  (HIL_SHUFFLE_SEED to replay) so usbtest batteries and flash churn spread
  across the timeline instead of convoying on one controller.
- Per-controller usbtest + flash semaphores: HIL_USBTEST_PARALLEL
  (default 4) concurrent usbtest batteries and HIL_FLASH_PARALLEL
  (default 8) concurrent flashes per host controller. Profiled on
  uPD720201 firmware 2.0.2.6 across 8/1..12/8: wall time falls
  22.2/14.3/12.5/10.8 min at usbtest width 1/2/3/4 and plateaus there;
  zero controller errors everywhere; first battery case failures
  (leaf-hub bandwidth stretch) appear at 12/8, and flash width 12 only
  amplifies flasher-hub contention flakes - so 8/4 is the optimum. A
  separate battery-window flash throttle was profiled and dropped.
- Give every example a unique hardcoded USB PID (0x4001-0x4022, usbtest
  keeps 0x4010) instead of the PID_MAP interface bitmap: different
  examples now always re-enumerate back-to-back, even on boards whose
  CPU reset does not drop D+ (WCH CH58x), so the EXAMPLE_PID table and
  same-PID adjacency reordering in hil_test.py are gone; only the
  variant-boundary same-example repeat needs a swap.
- Report matrix: stable columns with the metric-bearing tests pinned
  first (usbtest, cdc_msc_throughput, msc_file_explorer[_freertos]),
  the rest alphabetical.

Fail fast:
- enum wait budget 8 s on the first attempt, 4 s on retries; dfu waits
  are deadline-based so dfu-util's own runtime counts against the
  budget.
  A device-absent failure now costs ~3-5x a passing test (20-30 s)
  instead of 10-30x (47-150 s).
- CI runs hil_test with --retry 1 and no in-run second pass: a broken
  fixture fails the job fast instead of holding the self-hosted runner
  for hours and blocking other PRs' HIL jobs. hil_test still writes the
  .skip sidecar, so a manual re-run attempt only retests what failed.

Review fixes (multi-agent adversarial review of this commit):
- tinyusb_win_usbser.inf: the PID rework moved five CDC examples onto
  even PIDs the INF's odd-only DeviceList never matched (legacy-Windows
  usbser binding) - appended 0x4006/4008/400a/4020/4022 to both lists.
- usbtest example: USBTEST_TIER is now overridable and the descriptors
  and pumps are tier-conditional, so a board whose DCD cannot serve a
  tier lowers it instead of skipping the whole example - RA2A1 (RUSB2
  with no isochronous pipe) builds at tier 3 via its BOARD_ define; the
  host battery follows the tier advertised in bcdDevice. Tier-4 output
  verified byte-identical after the refactor.
- dynamic_configuration's second config derived USB_PID + 11 = 0x4018,
  colliding with net_lwip_webserver - now USB_PID + 0x0100, outside the
  per-example space. tools/check_example_pids.py (pre-commit hook)
  enforces PID uniqueness incl. derived and literal idProduct values.
- usbtest.py firmware gate: matched by device ID (uPD720201/720202,
  both use the 0x6c FW register), and an unreadable version (setpci
  missing/denied) now refuses with its own message instead of
  masquerading as "firmware 0x00000000"; noted the gate is necessary
  but not sufficient (board-specific kills stay per-board skips).
- hil_test: deadline waits use time.monotonic(); multiprocessing
  context pinned to fork (raw semaphores in Pool initargs); flash and
  usbtest permits unified into one fail-closed, exception-safe
  ctrl_permit (unknown controller takes every slot and logs a warning
  instead of silently borrowing slot 0); an all-skipped battery
  reports as skip, not "0/0" failure; slow-body polls (mtp, printer,
  disk read) go through a shared deadline-based wait_until so their
  bodies count against the enum budget; throughput's FS detection
  compares serials case-insensitively like every other walk; a missing
  MSC read-speed line now fails the host msc_file_explorer test
  instead of passing with an empty metric.

Hardening:
- fail fast (15 s) when a driver-registry sysfs write blocks: a wedged
  device otherwise turns every subsequent battery into an unkillable
  D-state writer and silently hangs the whole run
- usb-recover skill: a VM reboot is not a reliable cure (MosChip hubs
  latch up across the PCIe reset); full host power cycle is

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HeF2gZ1M7GWkz6Av4BpKPg
2026-07-14 13:22:48 +07:00
2026-04-14 10:51:20 +07:00
2025-11-19 18:37:15 +07:00
2025-11-21 12:58:28 +07:00
2023-08-02 15:52:06 +07:00
2025-01-21 16:28:26 +07:00

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This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

TinyUSB
=======

|Sponsor| |Build Status| |CircleCI Status| |Documentation Status| |Static Analysis| |Fuzzing Status| |Membrowse| |License|

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. Its 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.

Sponsors
--------

TinyUSB's continued development is made possible by its sponsors. If TinyUSB helps your products or projects, consider funding its development on `GitHub Sponsors`_.

Platinum
^^^^^^^^

`Adafruit`_ has backed TinyUSB since day one as its founding and sole Platinum sponsor. Buying their products directly funds the project's development.

.. figure:: docs/assets/adafruit_logo.svg
   :alt: Adafruit Logo
   :align: left
   :target: https://www.adafruit.com

.. raw:: html

   <div class="clear-both"></div>

Sponsors (QWORD)
^^^^^^^^^^^^^^^^

.. QWORD-SPONSORS-START

*No QWORD sponsors yet — be the first!*

.. QWORD-SPONSORS-END

Backers (DWORD)
^^^^^^^^^^^^^^^

.. DWORD-BACKERS-START

*No backers yet — be the first!*

.. DWORD-BACKERS-END

Supporters (Word)
^^^^^^^^^^^^^^^^^

.. WORD-SUPPORTERS-START

*No supporters yet — be the first!*

.. WORD-SUPPORTERS-END

Thanks (Byte)
^^^^^^^^^^^^^

.. BYTE-THANKS-START

*No names listed yet — be the first!*

.. BYTE-THANKS-END

.. _GitHub Sponsors: https://github.com/sponsors/hathach
.. _Adafruit: https://www.adafruit.com

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 1.0/2.0 (UAC1/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 ...
-  Printer class
-  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             | ✅     |      |           | stm32_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, H4                  | ✅     | ✅   | ❌        | dwc2                   |                    |
| ESP32        +-----------------------------+--------+------+-----------+------------------------+--------------------+
|              | P4                          | ✅     | ✅   | ✅        | dwc2                   |                    |
|              +-----------------------------+--------+------+-----------+------------------------+--------------------+
|              | S31                         | ✅     | ✅   | ✅        | 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   | nRF52, nRF53                | ✅     | ❌   | ❌        | nrf5x                  | only ep8 is ISO    |
|              +-----------------------------+--------+------+-----------+------------------------+--------------------+
|              | nRF54                       | ✅     | ❌   | ✅        | dwc2                   |                    |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+
| 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                | 🟡     | 🟡   | ✅        | lpc_ip3511, lpc_ip3516 | NRND [1]_          |
|              |         +-------------------+--------+------+-----------+------------------------+--------------------+
|              |         | 55                | ✅     | ✅   | ✅        | lpc_ip3511, lpc_ip3516 |                    |
|              +---------+-------------------+--------+------+-----------+------------------------+--------------------+
|              | 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, C5, 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             | ISO data loss [2]_ |
|              +-----------------------------+--------+------+-----------+------------------------+--------------------+
|              | CH32V20x                    | 🟡     |      | ❌        | stm32_fsdev/ch32_usbfs | ISO data loss [2]_ |
|              +-----------------------------+--------+------+-----------+------------------------+--------------------+
|              | CH32V305, CH32V307          | 🟡     |      | ✅        | ch32_usbfs/hs          | ISO data loss [2]_ |
|              +-----------------------------+--------+------+-----------+------------------------+--------------------+
|              | CH583/2, CH32V103           | 🟡     |      | ❌        | ch32_usbfs             | ISO data loss [2]_ |
+--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+

Table Legend
^^^^^^^^^^^^

========= =========================
✅         Supported
🟡         Partial support
❌         Not supported by hardware
\[empty\] Unknown
========= =========================

.. [1] NRND (Not Recommended for New Design), see `NXP LPC54600 issues <docs/reference/device_issues.rst#nxp-lpc54600>`_
.. [2] ISO data loss, see `WCH CH32F20x/CH32V20x/CH32V30x issues <docs/reference/device_issues.rst#wch-ch32f20x-ch32v20x-ch32v30x>`_

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
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.. |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
.. |Sponsor| image:: https://img.shields.io/badge/sponsor-%E2%9D%A4-ec6cb9.svg
   :target: https://github.com/sponsors/hathach


.. _Changelog: docs/changelog/index.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
Description
An open source cross-platform USB stack for embedded system
Readme MIT 91 MiB
Languages
C 87.1%
Python 6.1%
CMake 3.4%
Makefile 1.6%
Assembly 0.8%
Other 1%