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Changelog

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0.20.0

November 19, 2025

General

• New MCUs and Boards:

  • Add STM32U3 device support (adjusted from STM32U0)
  • Add nRF54H20 support with initial board configuration
  • Rename board names: pca10056→nrf52840dk, pca10059→nrf52840dongle, pca10095→nrf5340dk
  • Improve CMake: Move startup and linker files from board target to executable. Enhance target warning flags and fix various build warnings

• Code Quality and Static Analysis:

  • Add PVS-Studio static analysis to CI
  • Add SonarQube scan support
  • Add IAR C-Stat analysis capability
  • Add .clang-format for consistent code formatting
  • Fix numerous alerts and warnings found by static analysis tools

• Documentation:

  • Improve Getting Started documentation structure and flow
  • Add naming conventions and buffer handling documentation

Controller Driver (DCD & HCD)

• DWC2

  • Fix incorrect handling of Zero-Length Packets (ZLP) in the DWC2 driver when receiving data (OUT transfers)
  • Improve EP0 multi-packet logic
  • Support EP0 with max packet size = 8
  • For IN endpoint, write initial packet directly to FIFO and only use TXFE interrupt for subsequent packets
  • Fix ISO with bInterval > 2 using incomplete IN interrupt handling.
  • Fix compile issues when enabling both host and device
  • Clear pending suspend interrupt after USB reset (enum end)
  • Improve host closing endpoint and channel handling when device is unplugged

• FSDEV (STM32)

  • Fix AT32 USB interrupt remapping in dcd_int_enable()

• OHCI

  • Add initial LPC55 OHCI support
  • Improve data cache support

Device Stack

• USBD Core

  • Support configurable EP0 buffer size CFG_TUD_ENDPOINT0_BUFSIZE
  • Make dcd_edpt_iso_alloc/activate as default API for ISO endpoint

• Audio

  • Add UAC1 support
  • Implement RX FIFO threshold adjustment with tud_audio_get/set_ep_in_fifo_threshold()

• CDC

  • Migrate to endpoint stream API

• HID

  • Fix HID stylus descriptor

• MIDI

  • Migrate to endpoint stream API
  • Add tud_midi_n_packet_write_n() and tud_midi_n_packet_read_n()

• MTP

  • Fix incorrect MTP xact_len calculation

• Video

  • Add bufferless operation callback for dynamic frame generation with tud_video_prepare_payload_cb()

Host Stack

No changes

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 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