USB Stack

中文版

USB Stack is a tiny, beautiful and portable USB host and device stack for embedded system.

USB Stack Directoy Structure

.
├── class
│   ├── audio
│   ├── cdc
│   ├── dfu
│   ├── hid
│   ├── hub
│   ├── midi
│   ├── msc
│   ├── tmc
│   └── video
├── common
├── core
├── demo
│   ├── bouffalolab
│   └── stm32
│   └── mm32
│   └── ch32
├── docs
├── osal
├── packet capture
└── port
    ├── bouffalolab
    │   └── bl702
    ├── ch32
    ├── ehci
    ├── fsdev
    ├── mm32
    ├── synopsys
    ├── musb
    └── template

Directory	Description
class	usb class driver
common	usb spec macros and utils
core	usb core implementation
demo	different chip demo
osal	os wrapper
docs	doc for guiding
packet capture	packet capture file
port	usb dcd and hcd porting

USB Device Stack Overview

USB Device Stack provides a unified framework of functions for standard device requests, CLASS requests, VENDOR requests and custom special requests. The object-oriented and chained approach allows the user to quickly get started with composite devices without having to worry about the underlying logic. At the same time, a standard dcd porting interface has been standardised for adapting different USB IPs to achieve ip-oriented programming.

How USB Device Stack is implemented, this video will tell you: https://www.bilibili.com/video/BV1Ef4y1t73d .

USB Device Stack has the following functions：

Support USB2.0 full and high speed
Support endpoint irq callback register by users, let users do whatever they wants in endpoint irq callback.
Support Compound and Composite Device
Support Communication Device Class (CDC)
Support Human Interface Device (HID)
Support Custom human Interface Device (HID)
Support Mass Storage Class (MSC)
Support USB VIDEO CLASS (UVC)
Support USB AUDIO CLASS (UAC)
Support Device Firmware Upgrade CLASS (DFU)
Support USB MIDI CLASS (MIDI)
Support Test and Measurement CLASS (TMC)
Support Vendor class
Support WINUSB1.0、WINUSB2.0

USB Device Stack resource usage：

file	FLASH (Byte)	RAM (Byte)
usbd_core.c	3045	373
usbd_cdc.c	302	20
usbd_msc.c	2452	132
usbd_hid.c	784	201
usbd_audio.c	438	14
usbd_video.c	402	4

USB Host Stack Overview

The USB Host Stack has a standard enumeration implementation for devices mounted on roothubs and external hubs, and a standard interface for the different Class to indicate what the Class driver needs to do after enumeration and after disconnection. A standard hcd porting interface has also been standardised for adapting different USB IPs for IP-oriented programming. Finally, the protocol stack is managed using os, and provides osal to make a adaptation to different os.

How USB Host Stack is implemented, the video will be provided in future.

USB Host Stack has the following functions：

Automatic loading of supported Class drivers
Support blocking transfers and asynchronous transfers
Support Compound and Composite Device
Multi-level HUB support, expandable up to 7 levels
Support Communication Device Class (CDC)
Support Human Interface Device (HID)
Support Mass Storage Class (MSC)
Support Vendor class
Support Andriod AOA Communication

The USB Host stack also provides the lsusb function, which allows you to view information about all mounted devices, including those on external hubs, with the help of a shell plugin.

USB Device API

More of USB Device API reference, please visit : USB Device API

USB Host API

More of USB Host API reference, please visit: USB Host API

How To Use In RT-Thread package

How to use in RT-Thread package, please visit：RT-Thread package Userguide with usb stack

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