Tiny and portable usb host and device stack for mcu with usb ip

USB Stack

USB Stack 是一个跨平台的、用于嵌入式 MCU 的 USB 协议栈。其中 DEVICE 协议栈对标准设备请求、CLASS 请求、VENDOR 请求规范了一套统一的函数框架,从而对复合设备或者使用自定义设备类时,能够在极短的时间内进行添加和移植。同时提供了一套标准的 dcd porting 接口,供给不同的 MCU 使用,因此,通用性也非常高。此外在代码优美方面,以及内存占用方面也是相当出色。USB DEVICE 协议栈当前具有以下功能:

  • 支持 USB2.0 全速和高速设备
  • 支持端点中断注册功能,porting 给用户自己处理中断里的数据
  • 支持复合设备
  • 支持 Communication Class (CDC)
  • 支持 Human Interface Device (HID)
  • 支持 Custom human Interface Device (HID)
  • 支持 Mass Storage Class (MSC)
  • 支持 USB VIDEO CLASS (UVC)
  • 支持 USB AUDIO CLASS (UAC)
  • 支持 Device Firmware Upgrade CLASS (DFU)
  • 支持 USB MIDI CLASS (MIDI)
  • 支持 Test and Measurement CLASS (TMC)
  • 支持 Vendor 类 class
  • 支持 WINUSB1.0、WINUSB2.0

USB 参考手册

USB 协议栈实现

USB DEVICE 协议栈

USB DEVICE 协议栈的代码实现过程参考 https://www.bilibili.com/video/BV1Ef4y1t73d

USB HOST 协议栈

waiting....

USB DEVICE 协议栈 porting 接口

USB DEVICE 协议栈 porting 接口在 usb_stack/common/usb_dc.h 文件中声明,用户根据自己的 MCU 实现以下接口

USB DEVICE 控制器接口

用户需要实现 usb controller 相关寄存器初始化(可以命名为 usb_dc_init )以及在 USB 中断函数中,根据不同的中断标志调用 usbd_event_notify_handler

USB DEVICE 应用层接口

USB DEVICE 通用接口

usbd_desc_register

usbd_desc_register 用来注册 USB 描述符,描述符种类包括:设备描述符、配置描述符、接口描述符、字符串描述符、设备限定描述符。

void usbd_desc_register(const uint8_t *desc);
  • desc 描述符的句柄

usbd_msosv1_desc_register

usbd_msosv1_desc_register 用来注册一个 WINUSB 描述符,格式按照 struct usb_msosv1_descriptor

void usbd_msosv1_desc_register(struct usb_msosv1_descriptor *desc);
  • desc 描述符句柄

usbd_class_add_interface

usbd_class_add_interface 用来给 USB 设备类增加接口,并将接口信息挂载在类的链表上。

void usbd_class_add_interface(usbd_class_t *class, usbd_interface_t *intf);
  • class USB 设备类的句柄
  • intf USB 设备接口的句柄

usbd_class_t 定义如下

typedef struct usbd_class {
    usb_slist_t list;
    const char *name;
    usb_slist_t intf_list;
} usbd_class_t;
  • list 类的链表节点
  • name 类的名称
  • intf_list 接口的链表节点

usbd_interface_t 定义如下

typedef struct usbd_interface {
    usb_slist_t list;
    /** Handler for USB Class specific Control (EP 0) communications */
    usbd_request_handler class_handler;
    /** Handler for USB Vendor specific commands */
    usbd_request_handler vendor_handler;
    /** Handler for USB custom specific commands */
    usbd_request_handler custom_handler;
    /** Handler for USB event notify commands */
    usbd_notify_handler notify_handler;
    uint8_t intf_num;
    usb_slist_t ep_list;
} usbd_interface_t;
  • list 接口的链表节点
  • class_handler class setup 请求回调函数
  • vendor_handler vendor setup 请求回调函数
  • custom_handler custom setup 请求回调函数
  • notify_handler 中断标志、协议栈相关状态回调函数
  • intf_num 当前接口偏移
  • ep_list 端点的链表节点

usbd_interface_add_endpoint

usbd_interface_add_endpoint 用来给 USB 接口增加端点,并将端点信息挂载在接口的链表上。

void usbd_interface_add_endpoint(usbd_interface_t *intf, usbd_endpoint_t *ep);
  • intf USB 设备接口的句柄
  • ep USB 设备端点的句柄

usbd_class_t 定义如下

typedef struct usbd_endpoint {
    usb_slist_t list;
    uint8_t ep_addr;
    usbd_endpoint_callback ep_cb;
} usbd_endpoint_t;
  • list 端点的链表节点
  • ep_addr 端点地址
  • ep_cb 端点中断回调函数

usb_device_is_configured

usb_device_is_configured 用来检查 USB 设备是否被配置(枚举)。

bool usb_device_is_configured(void);
  • return 配置状态, 0 表示未配置, 1 表示配置成功

USB Device CDC 类接口

usbd_cdc_add_acm_interface

usbd_cdc_add_acm_interface 用来给 USB CDC ACM 类添加接口,并重写该接口相关的函数。重写的函数包括 cdc_acm_class_request_handlercdc_notify_handler, 其中 cdc_acm_class_request_handler 用于处理 USB CDC ACM Setup 中断请求, cdc_notify_handler 用于实现 USB CDC 其他中断回调函数。

void usbd_cdc_add_acm_interface(usbd_class_t *class, usbd_interface_t *intf);
  • class 类的句柄
  • intf 接口句柄

usbd_cdc_acm_set_line_coding

usbd_cdc_acm_set_line_coding 用来对串口进行配置。该接口由用户实现,默认为空。

void usbd_cdc_acm_set_line_coding(uint32_t baudrate, uint8_t databits, uint8_t parity, uint8_t stopbits);
  • baudrate 波特率
  • databits 数据位
  • parity 校验位
  • stopbits 停止位

usbd_cdc_acm_set_dtr

usbd_cdc_acm_set_line_coding 用来控制串口 DTR。该接口由用户实现,默认为空。

void usbd_cdc_acm_set_dtr(bool dtr);
  • dtr dtr 为1表示拉低电平,为0表示拉高电平

usbd_cdc_acm_set_rts

usbd_cdc_acm_set_line_coding 用来控制串口 RTS。该接口由用户实现,默认为空。

void usbd_cdc_acm_set_rts(bool rts);
  • rts rts 为1表示拉低电平,为0表示拉高电平

USB Device MSC 类接口

usbd_msc_class_init

usbd_msc_class_init 用于初始化 USB MSC 类,注册 USB CDC ACM 设备并为其添加接口,且为接口添加 BLUK OUT 、BULK IN 端点及其回调函数。

void usbd_msc_class_init(uint8_t out_ep, uint8_t in_ep);
  • out_ep 输出端点的地址
  • in_ep 输入端点的地址

usbd_msc_get_cap

usbd_msc_get_cap 用来获取存储器的信息。该接口由用户实现,默认为空。

void usbd_msc_get_cap(uint8_t lun, uint32_t *block_num, uint16_t *block_size);
  • lun 存储逻辑单元,暂时无用
  • block_num 存储扇区个数的指针
  • block_size 存储扇区大小的指针

usbd_msc_sector_read

usbd_msc_sector_read 用来对存储器某个扇区开始进行数据读取。该接口由用户实现,默认为空。

int usbd_msc_sector_read(uint32_t sector, uint8_t *buffer, uint32_t length);
  • sector 扇区偏移
  • buffer 存储读取的数据的指针
  • length 读取长度

usbd_msc_sector_write

usbd_msc_sector_write 用来对存储器某个扇区开始写入数据。该接口由用户实现,默认为空。

int usbd_msc_sector_write(uint32_t sector, uint8_t *buffer, uint32_t length);
  • sector 扇区偏移
  • buffer 写入数据指针
  • length 写入长度

USB Device HID 类接口

usbd_hid_add_interface

usbd_hid_add_interface 用来给 USB HID 类添加接口,并重写该接口相关的函数。重写的函数包括 hid_class_request_handlerhid_custom_request_handlerhid_notify_handler,其中 hid_class_request_handler 用来处理 USB HID 类的 Setup 中断请求, hid_custom_request_handler 用来处理 USB HID 获取描述符请求, hid_notify_handler 用来处理 USB HID 类的其他中断回调函数。

void usbd_hid_add_interface(usbd_class_t *class, usbd_interface_t *intf);
  • class 类的句柄
  • intf 接口句柄

usbd_hid_report_descriptor_register

usbd_hid_report_descriptor_register 用来对存储器某个扇区开始写入数据。该接口由用户实现,默认为空。

void usbd_hid_report_descriptor_register(uint8_t intf_num, const uint8_t *desc, uint32_t desc_len);
  • intf_num 当前 hid 报告描述符所在接口偏移
  • desc 报告描述符
  • desc_len 报告描述符长度

usbd_hid_set_request_callback

usbd_hid_set_request_callback 用来对存储器某个扇区开始写入数据。该接口由用户实现,默认为空。

void usbd_hid_set_request_callback( uint8_t intf_num,
                                    uint8_t (*get_report_callback)(uint8_t report_id, uint8_t report_type),
                                    void (*set_report_callback)(uint8_t report_id, uint8_t report_type, uint8_t *report, uint8_t report_len),
                                    uint8_t (*get_idle_callback)(uint8_t report_id),
                                    void (*set_idle_callback)(uint8_t report_id, uint8_t duration),
                                    void (*set_protocol_callback)(uint8_t protocol),
                                    uint8_t (*get_protocol_callback)(void));
  • intf_num 当前 hid 报告描述符所在接口偏移
  • get_report_callback get report命令处理回调函数
  • set_report_callback set report命令处理回调函数
  • get_idle_callback get idle命令处理回调函数
  • set_idle_callback set idle命令处理回调函数
  • set_protocol_callback set protocol命令处理回调函数
  • get_protocol_callback get protocol命令处理回调函数

USB Device AUDIO 类接口

usbd_audio_add_interface

usbd_audio_add_interface 用来给 USB Audio 类添加接口,并重写该接口相关的函数。重写的函数包括 audio_class_request_handleraudio_notify_handler

void usbd_audio_add_interface(usbd_class_t *class, usbd_interface_t *intf);
  • class 类的句柄
  • intf 接口句柄

USB Device VIDEO 类接口

usbd_video_add_interface

usbd_video_add_interface 用来给 USB Video 类添加接口,并重写该接口相关的函数。重写的函数包括 video_class_request_handlervideo_notify_handler

void usbd_video_add_interface(usbd_class_t *class, usbd_interface_t *intf);
  • class 类的句柄
  • intf 接口句柄

USB Device DFU 类接口

Comments
  • Synopsys/EHCI/OHCI support

    Synopsys/EHCI/OHCI support

    @sakumisu 您好,有几个问题请教一下: 1)CherryUSB软件包是否是独立于RT-Thread原生自带的USB驱动框架,即单独打开软件包即可使用,不需要打开RT-Thread的components/drivers/usb? 2)CherryUSB中所支持的Synopsys IP,是DesignWare HS OTG Controller吗?若是,是否已支持高速host和高速device?(我目前在跑Linux,用的是原生的dwc2的驱动) 3)CherryUSB中已支持EHCI,但未支持OHCI,是否意味着类似全志的SoC中支持标准EHCI/OHCI的USB host暂时无法使用全速/低速设备(如USB鼠标/键盘等)?

    希望能得到解答,谢谢!

  • Supported BSP for USBD_Video

    Supported BSP for USBD_Video

    你好,

    请问 USB Device 模拟摄像头现在除了 BL706_AVB 还支持其他开发板吗?似乎 BL706_AVB 只能在论坛申请。

    https://dev.bouffalolab.com/media/doc/sdk/bl_mcu_sdk_zh/samples/advance%20samples/usb/usbd_video.html

  • provide a way to override default SCSI_inquiry name

    provide a way to override default SCSI_inquiry name

    here is the hardcoded define in usbd_msc.c:461

    static bool SCSI_inquiry(uint8_t **data, uint32_t *len)
    {
        //...some code
    
        uint8_t inquiry[SCSIRESP_INQUIRY_SIZEOF] = {
            /* 36 */
    
            /* LUN 0 */
            0x00,
            0x80,
            0x02,
            0x02,
            (SCSIRESP_INQUIRY_SIZEOF - 5),
            0x00,
            0x00,
            0x00,
            'B', 'o', 'u', 'f', 'f', 'a', 'l', 'o', /* Manufacturer : 8 bytes */
            'P', 'r', 'o', 'd', 'u', 'c', 't', ' ', /* Product      : 16 Bytes */
            ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
            '0', '.', '0', '1' /* Version      : 4 Bytes */
        };
    
    

    Thanks.

  • [E/USB] ep:86 clear halt

    [E/USB] ep:86 clear halt

    stm32f103c8t6 demo\cdc_acm_hid_msc_template.c need modify usb_dc_fsdev.c USB_RAM_SIZE to 1024

    #ifndef USB_RAM_SIZE
    #define USB_RAM_SIZE 512
    #endif
    

    and hid endpoint get errors USB_REQUEST_CLEAR_FEATURE: [E/USB] ep:86 clear halt

    导致hid设备出现感叹号,这个应该如何解决

  • ch32v307 cdc aсm

    ch32v307 cdc aсm

    Tried your cdc acm example for my ch32v307 chip. On Linux, there are problems with registering a usb device:

    [597460.594304] usb 1-6: new high-speed USB device number 68 using xhci_hcd
    [597460.722349] usb 1-6: device descriptor read/64, error 18
    [597460.958271] usb 1-6: device descriptor read/64, error 18
    [597461.198248] usb 1-6: new high-speed USB device number 69 using xhci_hcd
    [597461.326338] usb 1-6: device descriptor read/64, error 18
    [597461.562305] usb 1-6: device descriptor read/64, error 18
    [597461.670409] usb usb1-port6: attempt power cycle
    [597462.086277] usb 1-6: new high-speed USB device number 70 using xhci_hcd
    [597462.110555] usb 1-6: device descriptor read/8, error -61
    [597462.242559] usb 1-6: device descriptor read/8, error -61
    

    If you use CherryUSB from this old repository, then everything works:

    [597604.323505] usb 1-6: new high-speed USB device number 72 using xhci_hcd
    [597604.471899] usb 1-6: New USB device found, idVendor=ffff, idProduct=ffff, bcdDevice= 1.00
    [597604.471905] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    [597604.471909] usb 1-6: Product: CherryUSB CDC DEMO
    [597604.471912] usb 1-6: Manufacturer: CherryUSB
    [597604.471915] usb 1-6: SerialNumber: 2022123456
    [597604.477337] cdc_acm 1-6:1.0: ttyACM1: USB ACM device
    

    Why is this happening?

  • ubuntu系统下,git clone后,直接git diff会提示CRLF 将被 LF 替换

    ubuntu系统下,git clone后,直接git diff会提示CRLF 将被 LF 替换

    warning: class/audio/usbd_audio.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/cdc/usbd_cdc.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/cdc/usbh_cdc_acm.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/cdc/usbh_cdc_acm.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/hid/usbd_hid.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/hid/usbh_hid.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/hid/usbh_hid.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/hub/usbh_hub.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/hub/usbh_hub.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/msc/usbd_msc.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/msc/usbh_msc.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/msc/usbh_msc.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: class/video/usbd_video.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: common/usb_dc.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: common/usb_def.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: common/usb_util.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: core/usbd_core.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: core/usbd_core.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: core/usbh_core.c 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: core/usbh_core.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。 warning: usb_config.h 中的 CRLF 将被 LF 替换。< 在工作区中该文件仍保持原有的换行符。

  • 修复./core/usbd_core.c以及./port/musb/usbd_dc_musb.c中的bug

    修复./core/usbd_core.c以及./port/musb/usbd_dc_musb.c中的bug

    1. 修复./core/usbd_core.c中bug
    • line 370,#ifdef CONFIG_USBDEV_TEST_MODE改为#if CONFIG_USBDEV_TEST_MODE
    • line897,添加memcpy(usbd_core_cfg.req_data, usbd_core_cfg.ep0_data_buf, nbytes)用于在循环读取数据时将数据备份到数组usbd_core_cfg.req_data中,以便数据读取结束后进行后续的请求处理。
    1. 修复./port/musb/usbd_dc_musb.c中的bug
    • 修复读8bit寄存器时按16bit读取的问题
    • 删除对只读寄存器的写操作
    • 优化中断程序的控制流程
  • Very minor typo in directory name

    Very minor typo in directory name

    I don't know how to create a PR for this.

    In https://github.com/sakumisu/CherryUSB/tree/master/docs the first directory should probably be "assets" (resources belonging to a project" and not "asserts" (like a programmer checking that something is true).

    Looks like a cool project! Congrats on creating it.

  • 关于USB转换芯片MAX3421E的协议栈移植问题

    关于USB转换芯片MAX3421E的协议栈移植问题

    由于使用的芯片没有USB主机功能,增加了一个美信的MAX3421E芯片,将SPI转USB,但是该芯片不提供协议栈,只有基础的驱动程序。MAX3421E的寄存器和通常的MCU USB IP寄存器不一样,不知道能否移植这个协议栈使用?
    看了下这个协议栈的移植例程,似乎是需要自己实现usb_dc_xxx层的驱动,为usbh_core.c提供接口函数,那么是否可以在usb_dc_xxx中直接对MAX3421E驱动的USB传输函数进行二次封装,而不实现寄存器映射表?
    如果能提供一些建议,将不胜感激!
    
  • OTG over USB/IP

    OTG over USB/IP

    Hi!

    I am very excited to find this project.

    I am trying to emulate USB MSD over USB/IP via ESP32. The end goal would be multiple Raspberry Pis, with ESP32's connected to their USB ports. The ESP32 would be available over USB/IP and then I would be able to use gadgetfs to configure the MSD to serve up over OTG.

    Is this possible? I do not have experience with ESP-IDF, etc. I would be very thankful for any help, I might be able to donate some money if it would help too.

  • Can you please point me to a BL702 Host example [HID]?

    Can you please point me to a BL702 Host example [HID]?

    HI,

    I'm interested in using this library in order to utilise a USB keyboard with a BL702 acting as the host, with a view to outputting keystrokes over uart as ascii - is there an example of such functionality that already exists that you might please point me to? Thanks!

  • lsusb -v cdc device

    lsusb -v cdc device

    Every time I do this on Linux: lsusb -v

    Then a log appears on my device:

    [E/USB] descriptor <type:6,index:0> not found!
    [E/USB] standard request error
    [E/USB] standard request error
    

    On Linux, this is the output of my device:

    Bus 001 Device 061: ID 1a86:fe0c QinHeng Electronics Validator
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               2.00
      bDeviceClass          239 Miscellaneous Device
      bDeviceSubClass         2 
      bDeviceProtocol         1 Interface Association
      bMaxPacketSize0        64
      idVendor           0x1a86 QinHeng Electronics
      idProduct          0xfe0c 
      bcdDevice            1.00
      iManufacturer           1 TTT
      iProduct                2 TTTTTTTTT
      iSerial                 3 E339E33917A5383B2662B908
      bNumConfigurations      1
      Configuration Descriptor:
        bLength                 9
        bDescriptorType         2
        wTotalLength       0x004b
        bNumInterfaces          2
        bConfigurationValue     1
        iConfiguration          0 
        bmAttributes         0x80
          (Bus Powered)
        MaxPower              100mA
        Interface Association:
          bLength                 8
          bDescriptorType        11
          bFirstInterface         0
          bInterfaceCount         2
          bFunctionClass          2 Communications
          bFunctionSubClass       2 Abstract (modem)
          bFunctionProtocol       1 AT-commands (v.25ter)
          iFunction               0 
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        0
          bAlternateSetting       0
          bNumEndpoints           1
          bInterfaceClass         2 Communications
          bInterfaceSubClass      2 Abstract (modem)
          bInterfaceProtocol      1 AT-commands (v.25ter)
          iInterface              2 Validator
          CDC Header:
            bcdCDC               1.10
          CDC Call Management:
            bmCapabilities       0x00
            bDataInterface          1
          CDC ACM:
            bmCapabilities       0x02
              line coding and serial state
          CDC Union:
            bMasterInterface        0
            bSlaveInterface         1 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x83  EP 3 IN
            bmAttributes            3
              Transfer Type            Interrupt
              Synch Type               None
              Usage Type               Data
            wMaxPacketSize     0x0008  1x 8 bytes
            bInterval              16
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       0
          bNumEndpoints           2
          bInterfaceClass        10 CDC Data
          bInterfaceSubClass      0 
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x02  EP 2 OUT
            bmAttributes            2
              Transfer Type            Bulk
              Synch Type               None
              Usage Type               Data
            wMaxPacketSize     0x0200  1x 512 bytes
            bInterval               0
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            2
              Transfer Type            Bulk
              Synch Type               None
              Usage Type               Data
            wMaxPacketSize     0x0200  1x 512 bytes
            bInterval               0
    can't get device qualifier: Resource temporarily unavailable
    can't get debug descriptor: Resource temporarily unavailable
    Device Status:     0x0000
      (Bus Powered)
    

    The project has a device qualifier descriptor and define CONFIG_USB_HS:

    #ifdef CONFIG_USB_HS
        ///////////////////////////////////////
        /// device qualifier descriptor
        ///////////////////////////////////////
        0x0a,
        USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
        0x00,
        0x02,
        0x02,
        0x02,
        0x01,
        0x40,
        0x01,
        0x00,
    #endif
        0x00
    

    In fact, I did not change anything in the descriptor, except for: vid, pid and 3 string . The sizes of string correctly counted

  • usb hub 多次枚举导致 No memory to alloc hub class

    usb hub 多次枚举导致 No memory to alloc hub class

    测试STM32F407的USB主机模式的时候使用USB延长线连接hub,导致usb线非常的长,如果先将hid接入到hub再接入控制器中,不会有问题;如果先将hub接入控制器,再将hid接入hub,则会出现
    image 跟踪调试之后发现,在后一种情况下,hid接入hub时,再中断函数中检查 USB_OTG_HPRT 寄存器值为 0x00021008,之后唤醒 usb-hub线程进行事件处理,在 usb-hub 线程中再次读取 USB_OTG_HPRT 寄存器值为 0x00021401,状态再次变成上电,导致hub设备在没有调用 CLASS_DISCONNECT 的情况下再次调用 CLASS_CONNECT,引发 No memory to alloc hub class 错误,并且再次拔插USB也无法恢复,必须重启stm32

  • GD32 dwc2驱动的GCCFG_NOVBUSSENS寄存器兼容性和stm32存在区别

    GD32 dwc2驱动的GCCFG_NOVBUSSENS寄存器兼容性和stm32存在区别

    虽然dwc2的文档里面写的支持GD32F30X_CL, 但在GD32305R-START(GD32F30X_CL)的开发板上测试的时候连电脑识别失败

    和gd32的官方的代码对比了下, 发现不开CONFIG_DWC2_VBUS_SENSING_ENABLE的时候, gd32即使设置了USB_OTG_GCCFG_NOVBUSSENS, 也必须设置USB_OTG_GCCFG_VBUSASEN/_VBUSBSEN才能正常工作(gd32官方驱动这里就和stm32的有区别, gd32官方设置的是两个都设置了, 实测设置至少其一就能工作, 不知道a和b啥区别, stm32是两个都取消了) (另参考http://www.elmagnifico.tech/2021/06/21/CUBEMX-GD32F450-USB/#usbfs_gccfg)

    https://github.com/sakumisu/CherryUSB/blob/f1a5345f26c645e2e1d30dbccb0eee19490e0619/port/dwc2/usb_dc_dwc2.c#L574-L580 虽然没用但怀疑usb_hc_dwc2也是一样的 这里希望能加个宏定义或者在USB IP 勘误文档中给个说明

        #ifdef CONFIG_DWC2_GD32
        USB_OTG_GLB->GCCFG |= USB_OTG_GCCFG_VBUSASEN | USB_OTG_GCCFG_VBUSBSEN;
        #else
        USB_OTG_GLB->GCCFG &= ~USB_OTG_GCCFG_VBUSBSEN;
        USB_OTG_GLB->GCCFG &= ~USB_OTG_GCCFG_VBUSASEN;
        #endif
    
  • Later roadmap

    Later roadmap

    • class driver

    • [x] msc device driver with os,support filesystem interface

    • [x] printer class support, device and host

    • [ ] mtp class support, device and host

    • [ ] cdc rndis host

    • [x] cdc rndis device

    • [x] hub process optimise in host mode

    • [ ] ftdi simulation,Copyright?

    • [ ] adb server driver

    • port

    • [x] synopsys dwc2 device port optimise

    • [x] synopsys dwc2 host port optimise

    • [ ] renesas usb ip port

    • [ ] rp2040 port ?

    • [ ] ohci port

    • [x] ehci with iso transfer

    • [x] xhci port

    • application

    • [x] daplink template for all chips

    • [x] audio with i2s or audio codec

    • [x] video with dvp

    • [ ] network with eth

    • [ ] network with wifi

    • [ ] network with printer,downloading file from net and print through printer

    • [ ] uf2

    • [ ] usb2 all bus:uart、i2c、spi、can

    • [x] dfu download with st tool

    • tool

    • [ ] ci test

    • [ ] config tool update:winusb desc、hid report desc、audio desc、video desc

    • [ ] class Stress tests scripts

    • [ ] winusb windows and linux driver

  • USB-MTP(Media Transfer Protocol)

    USB-MTP(Media Transfer Protocol)

    是否考虑增加 MTP?

    设备需要通过USB与PC进行文件传输,目前有两种方案 1、使用大容量存储(MSC) 使用MSC需要配合FAT文件系统, 由于FAT没有擦写均衡以及掉电保护,不适合用于设备中。

    2、使用MTP 可以兼顾文件系统的性能以及与PC交互的便捷性,目前看一些USB协议栈好像都没支持这种class,不知道是难度太大还是需求太少。

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______ _ ___ ___ | ___ \ | | | \/ | | |_/ /___ _ __ __| | ___ _ __| . . | __ _ _ __

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