path: root/docs/info/changelog.rst

*********
Changelog
*********

0.19.0
======

General
-------

- New MCUs and Boards:

  - Add ESP32-H4, ESP32-C5, ESP32-C61 support
  - Add STM32U0, STM32WBA, STM32N6
  - Add AT32F405, AT32F403A, AT32F415, AT32F423 support
  - Add CH32V305 support and CH32V20x USB host support
  - Add MCXA156 SDK 2.16 support and FRDM-MCXA156 board

API Changes
-----------

- Core APIs
  - Add weak callbacks with new syntax for better compiler compatibility
  - Add ``tusb_deinit()`` to cleanup stack
  - Add time functions: ``tusb_time_millis_api()`` and ``tusb_time_delay_ms_api()``
  - Add ``osal_critical`` APIs for critical section handling
  - Introduce ``xfer_isr()`` callback for ISO transfer optimization in device classes

- Device APIs
  - CDC: Add notification support ``tud_cdc_configure()``, ``tud_cdc_n_notify_uart_state()``,
    ``tud_cdc_n_notify_conn_speed_change()``, ``tud_cdc_notify_complete_cb()``
  - MSC: Add ``tud_msc_inquiry2_cb()`` with bufsize parameter, update ``tud_msc_async_io_done()``
    with ``in_isr`` parameter
  - Audio: Add ``tud_audio_n_mounted()`` and various FIFO access functions
  - MTP: Add ``tud_mtp_mounted()``, ``tud_mtp_data_send()``, ``tud_mtp_data_receive()``,
    ``tud_mtp_response_send()``, ``tud_mtp_event_send()``

- Host APIs
  - Core: Add ``tuh_edpt_close()``, ``tuh_address_set()``, ``tuh_descriptor_get_device_local()``,
    ``tuh_descriptor_get_string_langid()``, ``tuh_connected()``, ``tuh_bus_info_get()``
  - Add enumeration callbacks: ``tuh_enum_descriptor_device_cb()``,
    ``tuh_enum_descriptor_configuration_cb()``
  - CDC: Add ``tuh_cdc_get_control_line_state_local()``, ``tuh_cdc_get/set_dtr/rts()``,
    ``tuh_cdc_connect/disconnect()`` and sync versions of all control APIs
  - MIDI: Add ``tuh_midi_itf_get_info()``, ``tuh_midi_packet_read_n()``,
    ``tuh_midi_packet_write_n()``, ``tuh_midi_read_available()``, ``tuh_midi_write_flush()``,
    ``tuh_midi_descriptor_cb()``

Controller Driver (DCD & HCD)
-----------------------------

- DWC2
  - Support DWC2 v4.30a with improved reset procedure
  - Fix core reset: wait for AHB idle before reset
  - Add STM32 DWC2 data cache support with proper alignment
  - Host improvements:
    - Fix disconnect detection and SOF flag handling
    - Fix HFIR timing off-by-one error
    - Retry IN token immediately for bInterval=1
    - Proper attach debouncing (200ms)
    - Fix all retry intervals
    - Resume OUT transfer when PING ACKed
  - Fix enumeration racing conditions
  - Refactor bitfields for better code generation

- FSDEV (STM32)
  - Fix AT32 compile issues after single-buffered endpoint changes
  - Add configurable single-buffered isochronous endpoints
  - Fix STM32H7 recurrent suspend ISR
  - Fix STM32L4 GPIOD clock enable for variants without GPIOD
  - Fix STM32 PHYC PLL stability wait
  - Improve PMA size handling for STM32U0

- EHCI
  - Fix removed QHD getting reused
  - Fix NXP USBPHY disconnection detection

- Chipidea/NXP
  - Fix race condition with spinlock
  - Improve iMXRT support: fix build, disable BOARD_ConfigMPU, fix attach debouncing on port1 highspeed
  - Fix iMXRT1064 and add to HIL test pool

- MAX3421E
  - Use spinlock for thread safety instead of atomic flag
  - Implement ``hcd_edpt_close()``

- RP2040
  - Fix audio ISO transfer: reset state before notifying stack
  - Fix CMake RTOS cache variable
  - Abort transfer if active in ``iso_activate()``

- SAMD
  - Add host controller driver support

Device Stack
------------

- USBD Core
  - Introduce ``xfer_isr()`` callback for interrupt-time transfer handling
  - Add ``usbd_edpt_xfer_fifo()`` stub
  - Revert endpoint busy/claim status if ``xfer_isr()`` defers to ``xfer_cb()``

- Audio
  - Major simplification of UAC driver and alt settings management
  - Move ISO transfers into ``xfer_isr()`` for better performance
  - Remove FIFO mutex (single producer/consumer optimization)
  - Add implicit feedback support for data IN endpoints
  - Fix alignment issues
  - Update buffer macros with cache line size alignment

- CDC
  - Add notification support: ``CFG_TUD_CDC_NOTIFY``, ``tud_cdc_n_notify_conn_speed_change()``, ``tud_cdc_notify_complete_cb()``
  - Reduce default bInterval from 16ms to 1ms for better responsiveness
  - Rename ``tud_cdc_configure_fifo()`` to ``tud_cdc_configure()`` and add ``tx_overwritable_if_not_connected`` option
  - Fix web serial robustness with major overhaul and logic cleanup

- HID
  - Add Usage Page and Table for Power Devices (0x84 - 0x85)
  - Fix HID descriptor parser variable size and 4-byte item handling
  - Add consumer page configurations

- MIDI
  - Fix MIDI interface descriptor handling after audio streaming interface
  - Skip RX data with all zeroes

- MSC
  - Add async I/O support for MSC using ``tud_msc_async_io_done()``
  - Add ``tud_msc_inquiry2_cb()`` with bufsize for full inquiry response

- MTP
  - Add new Media Transfer Protocol (MTP) device class driver
  - Support MTP operations: GetDeviceInfo, SendObjectInfo, SendObject
  - Add MTP event support with ``tud_mtp_event_send()``
  - Implement filesystem example with callbacks
  - Add hardware-in-the-loop testing support

- NCM
  - Add USB NCM link state control support
  - Fix DHCP offer/ACK destination

- USBTMC
  - Add vendor-specific message support

- Vendor
  - Fix vendor device reset and open issues
  - Fix descriptor parsing for ``CFG_TUD_VENDOR > 1``
  - Fix vendor FIFO argument calculation

Host Stack
----------

- USBH Core
  - Major enumeration improvements:
    - Fix enumeration racing conditions
    - Add proper attach debouncing with hub/rootport handling (200ms delay)
    - Reduce ``ENUM_DEBOUNCING_DELAY_MS`` to 200ms
    - Always get language ID, manufacturer, product, and serial strings during enumeration
    - Always get first 2 bytes of string descriptor to determine length (prevents buffer overflow)
    - Support devices with multiple configurations
  - Add ``tuh_enum_descriptor_device_cb()`` and ``tuh_enum_descriptor_configuration_cb()`` callbacks
  - Add ``tuh_descriptor_get_string_langid()`` API
  - Hub improvements:
    - Check status before getting first device descriptor
    - Properly handle port status and change detection
    - Queue status endpoint for detach/remove events
    - Fix hub status change endpoint handling
  - Fix endpoint management:
    - ``hcd_edpt_open()`` returns false if endpoint already opened
    - Add ``hcd_edpt_close()`` implementation
    - Abort pending transfers on close
  - Add roothub debouncing flag to ignore attach/remove during debouncing
  - Move address setting and bus info management to separate structures
  - Force removed devices in same bus info before setting address

- CDC Serial Host
  - Major refactor to generalize CDC serial drivers (FTDI, CP210x, CH34x, PL2303, ACM)
  - Add explicit ``sync()`` API with ``TU_API_SYNC()`` returning ``tusb_xfer_result_t``
  - Rename ``tuh_cdc_get_local_line_coding()`` to ``tuh_cdc_get_line_coding_local()``
  - Add ``tuh_cdc_get_control_line_state_local()``
  - Implement ``tuh_cdc_get/set_dtr/rts()`` as inline functions

- MIDI Host
  - Major API changes:
    - Rename ``tuh_midi_stream_flush()`` to ``tuh_midi_write_flush()``
    - Add ``tuh_midi_packet_read_n()`` and ``tuh_midi_packet_write_n()``
    - Add ``CFG_TUH_MIDI_STREAM_API`` to opt out of stream API
    - Change API to use index instead of device address (supports multiple MIDI per device)
  - Rename ``tuh_midi_get_num_rx/tx_cables()`` to ``tuh_midi_get_rx/tx_cable_count()``
  - Add ``tuh_midi_descriptor_cb()`` and ``tuh_midi_itf_get_info()``

- MSC Host
  - Continue async I/O improvements

- HID Host
  - Fix version string to actually show version

0.18.0
======

General
-------

- New MCUs:

  - Add esp32p4 OTG highspeed support
  - Add stm32 u0, c0, h7rs

- Better support dcache, make sure all usb-transferred buffer are cache line aligned and occupy full cache line
- Build ARM IAR with CircleCI
- Improve HIL with `dual/host_info_to_device_cdc`` optional for pico/pico2, enable dwc2 dma test

API Changes
-----------

- Change signature of ``tusb_init(rhport, tusb_rhport_init_t*)``, ``tusb_init(void)`` is now deprecated but still available for backward compatibility
- Add new ``tusb_int_handler(rhport, in_isr)``
- Add time-related APIs: ``tusb_time_millis_api()`` and ``tusb_time_delay_ms_api()`` for non-RTOS, required for some ports/configuration
- New configuration macros:

  - ``CFG_TUD/TUH_MEM_DCACHE_ENABLE`` enable data cache sync for endpoint buffer
  - ``CFG_TUD/TUH_MEM_DCACHE_LINE_SIZE`` set cache line size
  - ``CFG_TUD/TUH_DWC2_SLAVE_ENABLE`` enable dwc2 slave mode
  - ``CFG_TUD/TUH_DWC2_DMA_ENABLE`` enable dwc2 dma mode

Controller Driver (DCD & HCD)
-----------------------------

- DWC2
  - Add DMA support for both device and host controller
  - Add host driver support including: full/high speed, control/bulk/interrupt (CBI) transfer, split CBI i.e FS/LS attached via highspeed hub, hub support

- RP2: implement ``dcd_edpt_iso_alloc()`` and ``dcd_edpt_iso_activate()`` for isochronous endpoint
- iMXRT1170 support M4 core

Device Stack
------------

- Vendor Fix  class reset
- NCM fix recursions in ``tud_network_recv_renew()``
- Audio fix align issue of ``_audiod_fct.alt_setting``
- UVC support format frame based
- Change ``dcd_dcache_()`` return type from void to bool
- HID add Usage Table for Physical Input Device Page (0x0F)

Host Stack
----------

- Fix an duplicated attach issue which cause USBH Defer Attach until current enumeration complete message

0.17.0
======

General
-------

- Improved CI: build both cmake and make. Make use of CircleCI for part of build process to speed up CI
- Add CodeQL Workflow for Code Security Analysis
- Add Clang compiler support
- Add default implementation for weak callbacks functions for better Keil compatibility
- Upgrade hardware-in-the-loop (HIL) testing with more boards and examples: including dual stack example

Controller Driver (DCD & HCD)
-----------------------------

- Chipidea

  - Support MCXA

- DWC2

  - Fix tickless issue with stm32f7: disable ULPI clock during sleep when using internal phy
  - Fix SOF interrupt handling
  - Fix fifo level half/empty issue
  - Add DWC2 Test Mode support.
  - for esp32 force disconnect/connect using USB_WRAP otg pad override

- FSDEV

  - Rewrite and Generalize driver to support non-stm32 mcu such as wch
  - Simplify PMA, HW FIFO access and bit manipulation for different access scheme 1x16, 2x16 and 32 bit
  - Add support for ch32 usbd e.g ch32v203
  - Add support for STM32G4 and STM32U5 microcontrollers.
  - Fix h5 (32-bit) errata 2.15.1: Buffer description table update completes after CTR interrupt triggers
  - ISO EP buffer allocation improvements, implement ``dcd_edpt_close_all()``

  - Fix ch32v203 race condition and stability issue with

    - fix ch32v203 seems to unconditionally accept ZLP on EP0 OUT.
    - fix v203 race condition between rx bufsize and RX_STAT which cause PMAOVR, occurs with WRITE10
    - correctly handle setup prepare at ``dcd_edpt0_status_complete()``, which fixes the race condition with windows where we could miss setup packet (setup bit set, but count = 0)

- MAX3421E

  - Add support for rp2040, esp32 (c3, c6, h2, etc..)
  - Add ``hcd_deinit()`` for max3421
  - Retry NAK handling next frame to reduce CPU and SPI bus usage
  - add ``cpuctl`` and ``pinctl`` to ``tuh_configure()`` option for max3421
  - Implement hcd abort transfer for Max3421
  - Properly Handle NAK Response in MAX3421E driver: correctly switch and skip writing to 2 FIFOs when NAK received. Otherwise, the driver may hang in certain conditions.

- MSP430: support non-bus-powered

- MUSB

  - Add support for Analoog devices: max32650, max32666, max32690, max3278002

- nRF

  - Fix ``dcd_edpt_open()`` for iso endpoint
  - Handle ISOOUT CRC errors
  - Add compile support with old nordic sdk
  - Fix a few race conditions

- OHCI

  - Allow more than 16 devices

- RP2040

  - Correctly abort control transfer when new setup arrived. Due to RP2040-E2 only able to fix B2 or later
  - Implement hcd abort transfer for rp2040
  - Add support for rp2350

- RUSB2

  - Support ra2a1 pipe number scheme

- WCH CH32

  - Added support for USB OTG/FS and FSDev Driver. Update CH32V307 to allow manual select FS or HS driver.
  - Fixed various bugs in CH32v307 usbhs driver: endpoint handling and data transfer management.

Device Stack
------------

- Add ``tud_deinit()`` and ``class driver deinit()`` to deinitialize TinyUSB device stack.
- Add support for generic SOF callback.
- Add set address recovery time 2ms per USB spec.

- Audio

  - Add audio_test_freertos & audio_4_channel_mic_freertos
  - Improved support for Audio Class 2.0 (UAC2) with various bug fixes.
  - Add feedback by fifo counting.

- Bluetooth HCI

  - Issue ZLP on ACL IN ep when transfer is multiple of endpoint max packet size

- CDC

  - Add ``tud_cdc_configure_fifo()`` to make RX/TX buffer persistent (not clear when disconnected)
  - Add missing capability bit for CDC ACM serial break support
  - Enhanced CDC class with better handling of large data transmissions.
  - Add missing capability bit for CDC ACM serial break support

- HID

  - Added missing key codes for keypad
  - Added HID Lighting and Illumination functionality
  - Fixed issues in the HID class for more reliable device enumeration.
  - Support HID Mouse with absolute positioning
  - Use separate buffer for control SET_REPORT, fix conflict with interrupt endpoint out

- MSC: Added support for SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL

- Net

  - Rewrite of NCM device driver to improve throughput
  - removed obsolete ``tud_network_link_state_cb()``

- USBTMC Added notification support

- Vendor

  - Migrate to new endpoint stream API, support non-buffered TX/RX
  - Add ZLP for ``write()`` when needed

- Video

  - Enhance UVC descriptors and example
  - Video Added support for USB Video Class (UVC) with MJPEG.
  - Fix multiple interfaces, add an example of 2ch video capture.
  - Fix race for ``tud_video_n_streaming()`` check

Host Stack
----------

- Added ``tuh_deinit()`` to de-initialize TinyUSB host stack.
- Added support for new USB mass storage class APIs.
- Improved error handling and retry mechanisms for unstable devices.

- CDC Serial

  - Add support for ch34x
  - Allow to overwrite ``CFG_TUH_CDC_FTDI/CP210X/CH32X_VID_PID_LIST``
  - Enhanced stability of CDC-ACM devices during enumeration.

- HID

  - Add ``tuh_hid_receive_abort()``
  - Add ``tuh_hid_get_report()``

- Hub

  - Prevent status request to invalid ep_num
  - Fix double status xfer
  - unroll hub removal

0.16.0
======

- New controller driver: MAX3421e (usb host shield), rusb2 (Renesas USB2.0), ChipIdea fullspeed
- New MCUs: MCXn9, nRF5340, STM32: G0, G4, L5, U575, U5A5, RA6m5, CH32F20x
- Add initial TypeC PowerDelivery support with STM32G4
- Remove submodules and use python script to manage repo dependencies #1947
- Add CMake support for most families and boards, move build file from tools/ to examples/build_system
- Add ETM trace support with JTrace for nrf52840, nrf5340, mcb1857, stm32h743eval, ra6m5
- [osal] Make it possible to override the ``osal_task_delay()`` in osal_none
- Add CDC+UAC2 composite device example
- Enhance Hardware-in-the-loop (HIL) testing with more boards: rp2040, stm32l412nucleo, stm32f746disco, lpcxpresso43s67

Controller Driver (DCD & HCD)
-----------------------------

- Add new ISO endpoint API: ``dcd_edpt_iso_alloc()`` and ``dcd_edpt_iso_activate()``
- Remove legacy driver st/synopsys

- EHCI

  - [iMXRT] Add dache clean/invalidate when memory is in cacheable memory
  - Fix portsc write issue which cause problem with enumeration
  - Fix an issue when doing port reset write to portsc
  - Fix port change detect is not recognized when power on with attached device
  - Fix xfer failed with disconnected device as stalled
  - Fix error on EHCI causes xfer error in non-queued qhd which cause memory fault
  - Un-roll recursive hub removal with usbh queue
  - Fix issue when removing queue head
  - Implement ``hcd_edpt_abort_xfer()``
  - use standard USB complete interrupt instead of custom chipidea async/period interrupt to be more compatible with other ehci implementation
  - refactor usb complete & error isr processing, merge, update. Fix EHCI QHD reuses QTD on wrong endpoint
  - Improve bus reset, fix ``send_setup()`` not carried out if halted previously
  - Fix clear qhd halted bit if not caused by STALL protocol to allow for next transfer

- ChipIdea Highspeed

  - Fix control transfer issue when previous status and new setup complete in the same isr frame
  - [imxrt] Add dcache support for cache region

- ChipIdea Fullspeed

  - Generalize ChipIdea Fullspeed driver for mcxn9 (port 0), kinetis

- nrf

  - Fix DMA race condition with ISO OUT transfer #1946
  - Add support for nRF5340 with pca10095 board

- Renesas rusb2

  - Generalize rusb2 driver for ra, rx mcus
  - rework both dcd and hcd for better multiple ports support
  - Add support for board with HS USB port: ra6m5 port1

- rp2040

  - [dcd] Make writes to SIE_CTRL aware of concurrent access
  - [hcd] add ``hcd_frame_number()``, ``hcd_edpt_abort_xfer()`` for pio-usb host

- stm32 fsdev:

  - Add STM32L5 support
  - Implement ``dcd_edpt_iso_alloc()`` and ``dcd_edpt_iso_activate()``

- OHCI

  - Allows configurable root hub ports, handles SMM mode (Ref OHCI spec 5.1.1.3.3) and Bios mode (Ref OHCI spec 5.1.1.3.4)
  - Fix FrameIntervalToggle must be toggled after we write the FrameInterval (Ref OHCI Spec 7.3.1)
  - Wait PowerOnToPowerGoodTime after we enable power of the RH ports (Ref OHCI Spec 7.4.1)
  - Generate port interrupts for devices already connected during init.
  - Fix issue when removing queue head
  - Disable MIE during IRQ processing and clear HccaDoneHead on completion as per OCHI Spec Page 80

Device Stack
------------

- Add optional hooks ``tud_event_hook_cb()``
- Audio (UAC2)

  - Fix feedback EP buffer alignment.
  - Fix encoding, update example
  - Improve IN transfer

- Bluetooth

  - Add historical EP compatibility for Bluetooth HCI

- CDC

  - Fix line_coding alignment
  - Fix typo in cdc line coding enum

- MIDI

  - Fix ``stream_write()`` always writes system messages to cable 0
  - Fix incorrect NOTE_ON, NOTE_OFF definitions

- USBTMC: Fix tmc488 bit order

- Vendor: fix ``read()``/``write()`` race condition

- Video (UVC)

  - Add the capability for video class to handle a bulk endpoint in the streaming interface.

Host Stack
----------

- USBH

  - Add new APIs: ``tuh_interface_set()``, ``tuh_task_event_ready()``, ``tuh_edpt_abort_xfer()``, ``tuh_rhport_reset_bus()``, ``tuh_rhport_is_active()``
  - Fix issue when device generate multiple attach/detach/attach when plugging in
  - Prefer application callback over built-in driver on transfer complete event
  - Correct ``hcd_edpt_clear_stall()`` API signature
  - Separate bus reset delay and contact debouncing delay in enumeration
  - Support ``usbh_app_driver_get_cb()`` for application drivers
  - Fix usbh enumeration removal race condition
  - Add optional hooks ``tuh_event_hook_cb()``

- CDC

  - Breaking: change ``tuh_cdc_itf_get_info()`` to use tuh_itf_info_t instead of tuh_cdc_info_t
  - Fix cdc host enumeration issue when device does not support line request
  - Add support for vendor usb2uart serial: ftdi, cp210x, ch9102f
  - Improve sync control API e.g  ``tuh_cdc_set_control_line_state()``, ``tuh_cdc_set_line_coding()``

- HID

  - Add new APIs ``tuh_hid_send_report()``, ``tuh_hid_itf_get_info()``, ``tuh_hid_receive_ready()``, ``tuh_hid_send_ready()``, ``tuh_hid_set_default_protocol()``
  - Change meaning of CFG_TUH_HID to total number of HID interfaces supported. Previously ``CFG_TUH_HID`` is max number of interfaces per device which is rather limited and consume more resources than needed.

- HUB

  - Fix handling of empty "status change" interrupt
  - Fix issue with hub status_change is not aligned

- MSC

  - Fix bug in ``tuh_msc_ready()``
  - Fix host msc get maxlun not using aligned section memory

0.15.0
======

- Add codespell to detect typo
- Add support for fuzzing and bagde for oss-fuzz
- [osal]

  - Allow the use of non-static allocation for FreeRTOS
  - Fix FreeRTOS wrong task switch in some cases

- Fix tu_fifo memory overflown when repeatedly write to overwritable fifo (accumulated more than 2 depths)
- Better support for IAR (ARM) with ci build check for stm32 mcus.
- Fix Windows build for some mingw gnu make situations

Controller Driver (DCD & HCD)
-----------------------------

- Add new port support (WIP) for WCH CH32V307 USB Highspeed
- Add new port support (WIP) for PIC32MM/MX & PIC24

- [nRF]

  - Fix endpoint internal state when closed
  - Fix reception of large ISO packets

- [rp2040]

  - [dcd] Implement workaround for Errata 15. This enable SOF when bulk-in endpoint is in use and reduce its bandwidth to only 80%
  - [hcd] Fix shared irq slots filling up when ``hcd_init()`` is called multiple times
  - [hcd] Support host bulk endpoint using hw "interrupt" endpoint. Note speed limit is 64KB/s

- [samd][dcd] Add support for ISO endpoint
- [dwc2][dcd] Add support for stm32u5xx
- [esp32sx] Fix Isochronous transfers only transmitted on even frame
- [lpc_ip3511][dcd] Add isochronous support and fix endpoint accidental write
- [ft90x] Improve and enhance support for FT9xx MCU, tested with more examples

Device Stack
------------

- [Video]

  - Add support for MJPEG
  - Fix probe on macOS

- [MIDI]

  - Support port name strings
  - fix MS Header wTotalLength computation

- [HID]

  - Add FIDO descriptor template
  - change length in ``tud_hid_report_complete_cb()`` from ``uint8_t`` to ``uint16_t``

- [CDC]

  - Fix autoflush for FIFO < MPS
  - Fix tx fifo memory overflown when DTR is not set and ``tud_cdc_write()`` is called repeatedly with large enough data

- [USBTMC] Fix packet size with highspeed

Host Stack
----------

- Retry a few times with transfers in enumeration since device can be unstable when starting up
- [MSC] Rework host masstorage API. Add new ``host/msc_file_explorer`` example
- [CDC]

  - Add support for host cdc
  - Fix host cdc with device without IAD e.g Arduino Due

0.14.0
======

- Improve compiler support for CCRX and IAR
- Add timeout to ``osal_queue_receive()``
- Add ``tud_task_ext(timeout, in_isr)`` as generic version of ``tud_task()``. Same as ``tuh_task_ext()``, ``tuh_task()``
- Enable more warnings ``-Wnull-dereference -Wuninitialized -Wunused -Wredundant-decls -Wconversion``
- Add new examples

  - ``host/bare_api`` to demonstrate generic (app-level) enumeration and endpoint transfer
  - ``dual/host_hid_to_device_cdc`` to run both device and host stack concurrently, get HID report from host and print out to device CDC. This example only work with multiple-controller MCUs and rp2040 with the help of pio-usb as added controller.

Controller Driver (DCD & HCD)
-----------------------------

- Enhance rhports management to better support dual roles

  - ``CFG_TUD_ENABLED``/``CFG_TUH_ENABLED``, ``CFG_TUD_MAX_SPEED``/``CFG_TUH_MAX_SPEED`` can be used to replace ``CFG_TUSB_RHPORT0_MODE``/``CFG_TUSB_RHPORT1_MODE``
  - ``tud_init(rphort)``, ``tuh_init(rhport)`` can be used to init stack on specified roothub port (controller) instead of ``tusb_init(void)``
- Add dcd/hcd port specific defines ``TUP_`` (stand for tinyusb port-specific)
- [dwc2]

  - Update to support stm32 h72x, h73x with only 1 otg controller
  - Fix overwrite with grstctl when disable endpoint
- [EHCI] Fix an issue with EHCI driver
- [msp430] Fix for possible bug in msp430-elf-gcc 9.3.0
- [nrf5x] Fix DMA access race condition using atomic function
- [pic32] Fix PIC32 santiy
- [rp2040]

  - Add PICO-PIO-USB as controller (device/host) support for rp2040
  - Use shared IRQ handlers, so user can also hook the USB IRQ
  - Fix resumed signal not reported to device stack
- [stm32fsdev] Add support for stm32wb55

Device Stack
------------

- [Audio] Add support for feedback endpoint computation

  - New API ``tud_audio_feedback_params_cb()``, ``tud_audio_feedback_interval_isr()``.
  - Supported computation method are: frequency with fixed/float or power of 2. Feedback with fifo count is not yet supported.
  - Fix nitfs (should be 3) in ``TUD_AUDIO_HEADSET_STEREO_DESCRIPTOR``
  - Fix typo in ``audiod_rx_done_cb()``

- [DFU] Fix coexistence with other interfaces BTH, RNDIS
- [MSC] Fix inquiry response additional length field
- [Venndor] Improve write performance

Host Stack
----------

- Add new API ``tuh_configure(rhport, cfg_id, cfg_param)`` for dynamnic port specific behavior configuration
- [HID] Open OUT endpoint if available
- [Hub] hub clear port and device interrupts
- [USBH] Major improvement

  - Rework usbh control transfer with complete callback. New API ``tuh_control_xfer()`` though still only carry 1 usbh (no queueing) at a time.
  - Add generic endpoint transfer with ``tuh_edpt_open()``, ``tuh_edpt_xfer()``. Require ``CFG_TUH_API_EDPT_XFER=1``
  - Support app-level enumeration with new APIs

    - ``tuh_descriptor_get()``, ``tuh_descriptor_get_device()``, ``tuh_descriptor_get_configuration()``, ``tuh_descriptor_get_hid_report()``
    - ``tuh_descriptor_get_string()``, ``tuh_descriptor_get_manufacturer_string()``, ``tuh_descriptor_get_product_string()``, ``tuh_descriptor_get_serial_string()``
    - Also add ``_sync()`` as sync/blocking version for above APIs

0.13.0
======

- [tu_fifo] Fix locked mutex when full, and return type in ``peek_n()``

Controller Driver (DCD & HCD)
-----------------------------

- [DWC2] Generalize synopsys dwc2 with synopsys/dwc2 which support both FS and HS phy (UTMI and ULPI) for various MCUs.
  - Broadcom 28/27xx on raspberrypi SBC
  - Silicon Labs EFM32
  - Espressif ESP32 Sx
  - GigaDevice GD32
  - ST STM32
  - Infineon XMC
- [KL25] Add new HCD for NXP KL25
- [MUSB] Add new DCD and HCD for Mentor musb with TI MSP432E4
- [F1C100s] Add new DCD for Allwinner F1C100s family
- [PIC32MZ] Add new DCD for PIC32MZ
- [nRF] Fix/Enhance various race condition with: EASY DMA, request HFXO, EPOUT
- [ChipIdea] rename Transdimension to more popular ChipIdea Highspeed,
- [RP2040] various update/fix for hcd/dcd
- [FT9XX] new DCD port for Bridgetek FT90x and FT93x devices
- [DA1469X] Fix resume
- [OHCI] Fix device array out of bound

Note: legacy drivers such as st/synopsys, nxp/transdimension are still present in this release but won't receive more update and could be removed in the future.

Device Stack
------------

- [Audio] Support disabling feedback format correction (16.16 <-> 10.14 format)
- [MSC] Add ``tud_msc_request_sense_cb()`` callback, change most default sense error to medium not present (0x02, 0x3A, 0x00)
- [Video] Fix video_capture example fails enumeration when 8FPS

Host Stack
----------

No notable changes

0.12.0
======

- add ``CFG_TUSB_OS_INC_PATH`` for os include path

Device Controller Driver (DCD)
------------------------------

- Getting device stack to pass USB Compliance Verification test (chapter9, HID, MSC). Ports are tested:
  nRF, SAMD 21/51, rp2040, stm32f4, Renesas RX, iMXRT, ESP32-S2/3, Kinetic KL25/32, DA146xx
- Added ``dcd_edpt_close_all()`` for switching configuration
- [Transdimension] Support ``dcd_edpt_xfer_fifo()`` with auto wrap over if fifo buffer is 4K aligned and size is multiple of 4K.
- [DA146xx] Improve vbus, reset, suspend, resume detection, and remote wakeup.

Device Stack
------------

- Add new network driver Network Control Model (CDC-NCM), update ``net_lwip_webserver`` to work with NCM (need re-configure example)
- Add new USB Video Class UVC 1.5 driver and video_capture example (work in progress)
- Fix potential buffer overflow for HID, bluetooth drivers

Host Controller Driver (HCD)
----------------------------

No notable changes

Host Stack
----------

No notable changes

0.11.0 (2021-08-29)
===================

- Add host/hid_controller example: only worked/tested with Sony PS4 DualShock controller
- Add device/hid_boot_interface example
- Add support for Renesas CCRX toolchain for RX mcu

Device Controller Driver (DCD)
------------------------------

- Add new DCD port for SAMx7x (E70, S70, V70, V71)
- Add new mcu K32L2Bxx
- Add new mcu GD32VF103
- Add new mcu STM32l151
- Add new mcu SAML21
- Add new mcu RX65n RX72n
- Fix NUC120/121/126 USBRAM can only be accessed in byte manner. Also improve set_address & disable sof
- Add Suspend/Resume handling for Renesas RX family.
- Fix DA1469x no VBUS startup

Synopsys
^^^^^^^^

- Fix Synopsys set address bug which could cause re-enumeration failed
- Fix ``dcd_synopsys`` driver integer overflow in HS mode (issue #968)

nRF5x
^^^^^

- Add nRF5x suspend, resume and remote wakeup
- Fix nRF5x race condition with ``TASKS_EP0RCVOUT``

RP2040
^^^^^^

- Add RP2040 suspend & resume support
- Implement double buffer for both host and device (#891). However device EPOUT is still single buffered due to techinical issue with short packet

Device Stack
------------

USBD
^^^^

- Better support big endian mcu
- Add ``tuh_inited()`` and ``tud_inited()``, will separate ``tusb_init/inited()`` to ``tud/tuh_init/inited()``
- Add ``dcd_attr.h`` for defining common controller attribute such as max endpoints

Bluetooth
^^^^^^^^^

- Fix stridx error in descriptor template

DFU
^^^

- Enhance DFU implementation to support multiple alternate interface and better support ``bwPollTimeout``
- Rename ``CFG_TUD_DFU_MODE`` to simply ``CFG_TUD_DFU``

HID
^^^

- Fix newline usage keyboard (ENTER 0x28)
- Better support Hid Get/Set report
- Change max gamepad support from 16 to 32 buttons

MIDI
^^^^

- Fix midi available
- Fix midi data
- Fix an issue when calling midi API when not enumerated yet

UAC2
^^^^

- Fix bug and enhance of UAC2

Vendor
^^^^^^

- Fix vendor fifo deadlock in certain case
- Add ``tud_vendor_n_read_flush()``

Host Controller Driver (HCD)
----------------------------

RP2040
^^^^^^

- Implement double buffered to fix E4 errata and boost performance
- Lots of rp2040 update and enhancement

Host Stack
----------

- Major update and rework most of host stack, still needs more improvement
- Lots of improvement and update in parsing configuration and control
- Rework and major update to HID driver. Will default to enable boot interface if available
- Separate ``CFG_TUH_DEVICE_MAX`` and ``CFG_TUH_HUB`` for better management and reduce SRAM usage

0.10.1 (2021-06-03)
===================

- rework rp2040 examples and CMake build, allow better integration with pico-sdk

Host Controller Driver (HCD)
----------------------------

- Fix rp2040 host driver: incorrect PID with low speed device with max packet size of 8 bytes
- Improve hub driver
- Remove obsolete ``hcd_pipe_queue_xfer()``/``hcd_pipe_xfer()``
- Use ``hcd_frame_number()`` instead of micro frame
- Fix OHCI endpoint address and ``xferred_bytes`` in xfer complete event

0.10.0 (2021-05-28)
===================

- Rework tu_fifo_t with separated mutex for read and write, better support DMA with read/write buffer info. And constant address mode
- Improve audio_test example and add audio_4_channel_mic example
- Add new dfu example
- Remove pico-sdk from submodule

Device Controller Driver (DCD)
------------------------------

- Add new DCD port for Silabs EFM32GG12 with board Thunderboard Kit (SLTB009A)
- Add new DCD port Renesas RX63N, board GR-CITRUS
- Add new (optional) endpoint API dcd_edpt_xfer_fifo
- Fix build with nRF5340
- Fix build with lpc15 and lpc54
- Fix build with lpc177x_8x
- STM32 Synopsys: greatly improve Isochronous transfer with ``edpt_xfer_fifo()`` API
- Support LPC55 port1 highspeed
- Add support for Espressif esp32s3
- nRF: fix race condition that could cause drop packet of Bulk OUT transfer

USB Device Driver (USBD)
------------------------

- Add new (optional) endpoint ADPI ``usbd_edpt_xfer_fifo()``

Device Class Driver
-------------------

CDC

- [Breaking] ``tud_cdc_peek()``, ``tud_vendor_peek()`` no longer support random offset and dropped position parameter.

DFU

- Add new DFU 1.1 class driver (WIP)

HID

- Fix keyboard report descriptor template
- Add more hid keys constant from 0x6B to 0xA4

- [Breaking] rename API
  - ``HID_PROTOCOL_NONE/KEYBOARD/MOUSE`` to ``HID_ITF_PROTOCOL_NONE/KEYBOARD/MOUSE``
  - ``tud_hid_boot_mode()`` to ``tud_hid_get_protocol()``
  - ``tud_hid_boot_mode_cb()`` to ``tud_hid_set_protocol_cb()``

MIDI

- Fix MIDI buffer overflow issue

- [Breaking] rename API
  - Rename ``tud_midi_read()`` to ``tud_midi_stream_read()``
  - Rename ``tud_midi_write()`` to ``tud_midi_stream_write()``
  - Rename ``tud_midi_receive()`` to ``tud_midi_packet_read()``
  - Rename ``tud_midi_send()`` to ``tud_midi_packet_write()``

Host Controller Driver (HCD)
----------------------------

- No noticeable changes

USB Host Driver (USBH)
----------------------

- No noticeable changes

Host Class Driver
-----------------

- HID: Rework host hid driver, basically everything changes


0.9.0 (2021-03-12)
==================

Device Stack
------------

Device Controller Driver (DCD)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

RP2040

- Fix endpoint buffer reallocation overrun problem
- Fix osal_pico queue overflow in initialization
- Fix Isochronous endpoint buffer size in transfer
- Optimize hardware endpoint struct to reduce RAM usage
- Fix enum walkaround forever check for SE0 when pull up is disabled

Sony CXD56

- Pass the correct speed on Spresense
- Fix setup processed flag

NXP Transdimention

- Update dcd_init() to reset controller to device mode

USB Device Driver (USBD)
^^^^^^^^^^^^^^^^^^^^^^^^

- Fix issue with status zlp (``tud_control_status()``) is returned by class driver with SET/CLEAR_FEATURE for endpoint.
- Correct endpoint size check for fullspeed bulk, can be 8, 16, 32, 64
- Ack SET_INTERFACE even if it is not implemented by class driver.

Device Class Driver
^^^^^^^^^^^^^^^^^^^

DFU Runtime

- rename ``dfu_rt()`` to ``dfu_runtime()`` for easy reading

CDC

- Add ``tud_cdc_send_break_cb()`` to support break request
- Improve CDC receive, minor behavior changes: when ``tud_cdc_rx_wanted_cb()`` is invoked wanted_char may not be the last byte in the fifo

HID

- [Breaking] Add itf argument to hid API to support multiple instances, follow API has signature changes

  - ``tud_hid_descriptor_report_cb()``
  - ``tud_hid_get_report_cb()``
  - ``tud_hid_set_report_cb()``
  - ``tud_hid_boot_mode_cb()``
  - ``tud_hid_set_idle_cb()``

- Add report complete callback ``tud_hid_report_complete_cb()`` API
- Add DPad/Hat support for HID Gamepad

  - ``TUD_HID_REPORT_DESC_GAMEPAD()`` now support 16 buttons, 2 joysticks, 1 hat/dpad
  - Add ``hid_gamepad_report_t`` along with ``GAMEPAD_BUTTON_`` and ``GAMEPAD_HAT_`` enum
  - Add Gamepad to ``hid_composite`` / ``hid_composite_freertos`` example

MIDI

- Fix dropping MIDI sysex message when fifo is full
- Fix typo in ``tud_midi_write24()``, make example less ambiguous for cable and channel
- Fix incorrect endpoint descriptor length, MIDI v1 use Audio v1 which has 9-byte endpoint descriptor (instead of 7)

Host Stack
----------

Host Controller Driver (HCD)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Add rhport to ``hcd_init()``
- Improve EHCI/OHCI driver abstraction

  - Move echi/ohci files to portable/
  - Rename ``hcd_lpc18_43`` to ``hcd_transdimension``
  - Sub hcd API with ``hcd_ehci_init()``, ``hcd_ehci_register_addr()``

- Update NXP transdimension ``hcd_init()`` to reset controller to host mode

  - Ported hcd to rt10xx

USB Host Driver (USBH)
^^^^^^^^^^^^^^^^^^^^^^

- No noticeable changes to usbh

Host Class Driver
^^^^^^^^^^^^^^^^^

MSC

- Rename ``tuh_msc_scsi_inquiry()`` to ``tuh_msc_inquiry()``
- Rename ``tuh_msc_mounted_cb()``/``tuh_msc_unmounted_cb()`` to ``tuh_msc_mount_cb()``/``tuh_msc_unmount_cb()`` to match device stack naming
- Change ``tuh_msc_is_busy()`` to ``tuh_msc_ready()``
- Add read10 and write10 function: ``tuh_msc_read10()``, ``tuh_msc_write10()``
- Read_Capacity is invoked as part of enumeration process
- Add ``tuh_msc_get_block_count()``, ``tuh_msc_get_block_size()``
- Add ``CFG_TUH_MSC_MAXLUN`` (default to 4) to hold lun capacities

Others
------

- Add basic support for rt-thread OS
- Change zero bitfield length to more explicit padding
- Build example now fetch required submodules on the fly while running ``make`` without prior submodule init for mcu drivers
- Update pico-sdk to v1.1.0

**New Boards**

- Microchip SAM E54 Xplained Pro
- LPCXpresso 55s28
- LPCXpresso 18s37


0.8.0 (2021-02-05)
==================

Device Controller Driver
------------------------

- Added new device support for Raspberry Pi RP2040
- Added new device support for NXP Kinetis KL25ZXX
- Use ``dcd_event_bus_reset()`` with link speed to replace bus_signal

- ESP32-S2:
  - Add bus suspend and wakeup support

- SAMD21:
  - Fix (walkaround) samd21 setup_packet overflow by USB DMA

- STM32 Synopsys:
  - Rework USB FIFO allocation scheme and allow RX FIFO size reduction

- Sony CXD56
  - Update Update Spresense SDK to 2.0.2
  - Fix dcd issues with setup packets
  - Correct EP number for cdc_msc example

USB Device
----------

**USBD**

- Rework usbd control transfer to have additional stage parameter for setup, data, status
- Fix ``tusb_init()`` return true instead of ``TUSB_ERROR_NONE``
- Added new API ``tud_connected()`` that return true after device got out of bus reset and received the very first setup packet

**Class Driver**

- CDC
  - Allow to transmit data, even if the host does not support control line states i.e set DTR

- HID
  - change default ``CFG_TUD_HID_EP_BUFSIZE`` from 16 to 64

- MIDI
  - Fix midi sysex sending bug

- MSC
  - Invoke only scsi complete callback after status transaction is complete.
  - Fix ``scsi_mode_sense6_t`` padding, which cause IAR compiler internal error.

- USBTMC
  - Change interrupt endpoint example size to 8 instead of 2 for better compatibility with mcu

**Example**

- Support make from windows ``cmd.exe``
- Add HID Consumer Control (media keys) to ``hid_composite`` & ``hid_composite_freertos`` examples


USB Host
--------

No noticeable changes to host stack

New Boards
----------

- NXP/Freescale Freedom FRDM-KL25Z
- Feather Double M33 express
- Raspberry Pi Pico
- Adafruit Feather RP2040
- Adafruit Itsy Bitsy RP2040
- Adafruit QT RP2040
- Adfruit Feather ESP32-S2
- Adafruit Magtag 29" Eink
- Adafruit Metro ESP32-S2
- Adafruit PyBadge
- Adafruit PyPortal
- Great Scott Gadgets' LUNA D11 & D21


0.7.0 (2020-11-08)
==================

Device Controller Driver
------------------------

- Added new support for Espressif ESP32-S2
- Added new support for Dialog DA1469x
- Enhance STM32 Synopsys

- Support bus events disconnection/suspend/resume/wakeup
  - Improve transfer performance with optimizing xfer and fifo size
  - Support Highspeed port (OTG_HS) with both internal and external PHY
  - Support multiple usb ports with rhport=1 is highspeed on selected MCUs e.g H743, F23. It is possible to have OTG_HS to run on Fullspeed PHY (e.g lacking external PHY)
  - Add ISO transfer, fix odd/even frame
  - Fix FIFO flush during stall
  - Implement ``dcd_edpt_close()`` API
  - Support F105, F107

- Enhance STM32 fsdev
  - Improve dcd fifo allocation
  - Fix ISTR race condition
  - Support remap USB IRQ on supported MCUs
  - Implement ``dcd_edpt_close()`` API

- Enhance NUC 505: enhance set configure behavior

- Enhance SAMD
  - Fix race condition with setup packet
  - Add SAMD11 option ``OPT_MCU_SAMD11``
  - Add SAME5x option ``OPT_MCU_SAME5X``

- Fix SAMG control data toggle and stall race condition

- Enhance nRF
  - Fix hanged when ``tud_task()`` is called within critical section (disabled interrupt)
  - Fix disconnect bus event not submitted
  - Implement ISO transfer and ``dcd_edpt_close()``


USB Device
----------

**USBD**

- Add new class driver for **Bluetooth HCI** class driver with example can be found in [mynewt-tinyusb-example](https://github.com/hathach/mynewt-tinyusb-example) since it needs mynewt OS to run with.
- Fix USBD endpoint usage racing condition with ``usbd_edpt_claim()``/``usbd_edpt_release()``
- Added ``tud_task_event_ready()`` and ``osal_queue_empty()``. This API is needed to check before enter low power mode with WFI/WFE
- Rename USB IRQ Handler to ``dcd_int_handler()``. Application must define IRQ handler in which it calls this API.
- Add ``dcd_connect()`` and ``dcd_disconnect()`` to enable/disable internal pullup on D+/D- on supported MCUs.
- Add ``usbd_edpt_open()``
- Remove ``dcd_set_config()``
- Add ``OPT_OS_CUMSTOM`` as hook for application to overwrite and/or add their own OS implementation
- Support SET_INTERFACE, GET_INTERFACE request
- Add Logging for debug with optional uart/rtt/swo printf retarget or ``CFG_TUSB_DEBUG_PRINTF`` hook
- Add IAR compiler support
- Support multiple configuration descriptors. ``TUD_CONFIG_DESCRIPTOR()`` template has extra config_num as 1st argument
- Improve USB Highspeed support with actual link speed detection with ``dcd_event_bus_reset()``

- Enhance class driver management
  - ``usbd_driver_open()`` add max length argument, and return length of interface (0 for not supported). Return value is used for finding appropriate driver
  - Add application implemented class driver via ``usbd_app_driver_get_cb()``
  - IAD is handled to assign driver id

- Added ``tud_descriptor_device_qualifier_cb()`` callback
- Optimize ``tu_fifo`` bulk write/read transfer
- Forward non-std control request to class driver
- Let application handle Microsoft OS 1.0 Descriptors (the 0xEE index string)
- Fix OSAL FreeRTOS yield from ISR

**Class Drivers**

- USBNET: remove ACM-EEM due to lack of support from host
- USBTMC: fix descriptors when INT EP is disabled

- CDC:
  - Send zero length packet for end of data when needed
  - Add ``tud_cdc_tx_complete_cb()`` callback
  - Change ``tud_cdc_n_write_flush()`` return number of bytes forced to transfer, and flush when writing enough data to fifo

- MIDI:
  - Add packet interface
  - Add multiple jack descriptors
  - Fix MIDI driver for sysex

- DFU Runtime: fix response to SET_INTERFACE and DFU_GETSTATUS request

- Rename some configure macro to make it clear that those are used directly for endpoint transfer
  - ``CFG_TUD_HID_BUFSIZE`` to ``CFG_TUD_HID_EP_BUFSIZE``
  - ``CFG_TUD_CDC_EPSIZE`` to ``CFG_TUD_CDC_EP_BUFSIZE``
  - ``CFG_TUD_MSC_BUFSIZE`` to ``CFG_TUD_MSC_EP_BUFSIZE``
  - ``CFG_TUD_MIDI_EPSIZE`` to ``CFG_TUD_MIDI_EP_BUFSIZE``

- HID:
  - Fix gamepad template descriptor
  - Add multiple HID interface API
  - Add extra comma to HID_REPORT_ID

USB Host
--------

- Rework USB host stack (still work in progress)
   - Fix compile error with pipehandle
   - Rework usbh control and enumeration as non-blocking

- Improve Hub, MSC, HID host driver

Examples
--------

- Add new ``hid_composite_freertos``
- Add new ``dynamic_configuration`` to demonstrate how to switch configuration descriptors
- Add new ``hid_multiple_interface``

- Enhance ``net_lwip_webserver`` example
  - Add multiple configuration: RNDIS for Windows, CDC-ECM for macOS (Linux will work with both)
  - Update lwip to STABLE-2_1_2_RELEASE for ``net_lwip_webserver``

- Added new Audio example: ``audio_test`` ``uac2_headsest``

New Boards
----------

- Espressif ESP32-S2: saola_1, kaluga_1
- STM32: F746 Nucleo, H743 Eval, H743 Nucleo, F723 discovery, stlink v3 mini, STM32L4r5 Nucleo
- Dialog DA1469x dk pro and dk usb
- Microchip: Great Scoot Gadgets' LUNA, samd11_xplained, D5035-01, atsamd21 xplained pro
- nRF: ItsyBitsy nRF52840


0.6.0 (2020-03-30)
==================

Added **CONTRIBUTORS.md** to give proper credit for contributors to the stack. Special thanks to `Nathan Conrad <https://github.com/pigrew>`__ , `Peter Lawrence <https://github.com/majbthrd>`__ , `William D. Jones <https://github.com/cr1901>`__ and `Sean Cross <https://github.com/xobs>`__ and others for spending their precious time to add lots of features and ports for this release.

Added
-----

**MCU**

- Added support for Microchip SAMG55
- Added support for Nordic nRF52833
- Added support for Nuvoton: NUC120, NUC121/NUC125, NUC126, NUC505
- Added support for NXP LPC: 51Uxx, 54xxx, 55xx
- Added support for NXP iMXRT: RT1011, RT1015, RT1021, RT1052, RT1062, RT1064
- Added support for Sony CXD56 (Spresense)
- Added support for STM32: L0, F0, F1, F2, F3, F4, F7, H7
- Added support for TI MSP430
- Added support for ValentyUSB's eptri

**Class Driver**

- Added DFU Runtime class driver
- Added Network class driver with RNDIS, CDC-ECM, CDC-EEM (work in progress)
- Added USBTMC class driver
- Added WebUSB class driver using vendor-specific class
- Added multiple instances support for CDC and MIDI
- Added a handful of unit test with Ceedling.
- Added LOG support for debugging with CFG_TUSB_DEBUG
- Added ``tud_descriptor_bos_cb()`` for BOS descriptor (required for USB 2.1)
- Added ``dcd_edpt0_status_complete()`` as optional API for DCD

**Examples**

Following examples are added:

- ``board_test``
- ``cdc_dual_ports``
- ``dfu_rt``
- ``hid_composite``
- ``net_lwip_webserver``
- ``usbtmc``
- ``webusb_serial``

Changed
-------

- Changed ``tud_descriptor_string_cb()`` to have additional Language ID argument
- Merged ``hal_nrf5x.c`` into ``dcd_nrf5x.c``
- Merged ``dcd_samd21.c`` and ``dcd_samd51.c`` into ``dcd_samd.c``
- Generalized ``dcd_stm32f4.c`` to ``dcd_synopsys.c``
- Changed ``cdc_msc_hid`` to ``cdc_msc`` (drop hid) due to limited endpoints number of some MCUs
- Improved DCD SAMD stability, fix missing setup packet occasionally
- Improved ``usbd/usbd_control`` with proper handling of zero-length packet (ZLP)
- Improved STM32 DCD FSDev
- Improved STM32 DCD Synopsys
- Migrated CI from Travis to Github Action
- Updated nrfx submodule to 2.1.0
- Fixed mynewt osal queue definition
- Fixed ``cdc_msc_freertos`` example build for all MCUs


0.5.0 (2019-06)
===============

First release, device stack works great, host stack works but still need improvement.

- Special thanks to @adafruit team, especially @tannewt to help out immensely to rework device stack: simplify osal & control transfer, adding SAMD21/SAMD51 ports, writing porting docs, adding MIDI class support etc...
- Thanks to @cr1901 for adding STM32F4 port.
- Thanks to @PTS93 and @todbot for HID raw API