3.33. Host Dual Port

3.33.1. 概述

本示例工程展示USB Host 2个usb口同时工作,支持HID(Keyboard和Mouse)和MSC设备(U盘的文件系统格式:FAT)。

3.33.2. 硬件设置

  • 使用USB Type-C线缆线连接PC USB端口和PWR DEBUG端口

  • 使用USB Type-C转Type-A线缆线连接开发板USB0端口

  • 使用USB Type-C转Type-A线缆线连接开发板USB1端口

3.33.3. 运行现象

  • 将程序下载至开发板运行,使用串口调试助手查看输出log;

  • 将U盘插入UBS0或USB1任意端口

    • 首先,会在U盘里面创建一个”cherryusb_msc_test.txt”文件,往文件里面写入字符串”cherryusb fatfs demo…”,总共100行,总长度为2500字节;然后将该文件的数据读取出来,总长度为2500。

    • 其次,会扫描U盘根目录下的目录和文件,将目录名和文件名打印出来,串口调试助手会显示如下数据:

    FATFS cherryusb mount succeeded!
    test fatfs write
    write success, write len:2500
    test fatfs read
    read success, read len:2500
    
    Direcotry Path: /
    Folder Name: LOST.DIR
    Folder Name: DCIM
    Folder Name: MIUI
    Folder Name: Android
    Folder Name: tencent
    File   Name: USBHost.txt
    File   Name: cherryusb_msc_test.txt
    
  • 将键盘插入UBS0或USB1任意端口

    • 接入后,串口调试助手会显示如下数据:

    [D/USB] Port change:0x02
    [D/USB] Port 1 change
    [D/USB] port 1, status:0x101, change:0x01
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [I/USB] New low-speed device on Hub 1, Port 1 connected
    [I/USB] New device found,idVendor:413c,idProduct:2113,bcdDevice:0108
    [I/USB] The device has 2 interfaces
    [I/USB] Enumeration success, start loading class driver
    [I/USB] Loading hid class driver
    [I/USB] Ep=81 Attr=03 Mps=8 Interval=24 Mult=00
    [I/USB] Register HID Class:/dev/input0
    [E/USB] do not support Class:0x03,Subclass:0x00,Protocl:0x00
    mount a keyboard
    
    • 当按压键盘时,将显示键盘发送的数据:

    0x00 0x00 0x16 0x00 0x00 0x00 0x00 0x00 nbytes:8
    0x00 0x00 0x16 0x07 0x00 0x00 0x00 0x00 nbytes:8
    0x00 0x00 0x07 0x00 0x00 0x00 0x00 0x00 nbytes:8
    0x00 0x00 0x16 0x00 0x00 0x00 0x00 0x00 nbytes:8
    0x00 0x00 0x16 0x07 0x00 0x00 0x00 0x00 nbytes:8
    0x00 0x00 0x07 0x00 0x00 0x00 0x00 0x00 nbytes:8
    0x00 0x00 0x16 0x00 0x00 0x00 0x00 0x00 nbytes:8
    
  • 将鼠标插入UBS0或USB1任意端口

    • 接入后,串口调试助手会显示如下数据:

    [D/USB] Port change:0x02
    [D/USB] Port 1 change
    [D/USB] port 1, status:0x100, change:0x01
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [D/USB] Port 1, status:0x101, change:0x00
    [I/USB] New full-speed device on Hub 1, Port 1 connected
    [I/USB] New device found,idVendor:046d,idProduct:c542,bcdDevice:0302
    [I/USB] The device has 1 interfaces
    [I/USB] Enumeration success, start loading class driver
    [I/USB] Loading hid class driver
    [I/USB] Ep=82 Attr=03 Mps=8 Interval=04 Mult=00
    [I/USB] Register HID Class:/dev/input0
    mount a mouse
    
    • 当移动或点击鼠标时,将显示鼠标发送的数据:

    0x01 0x00 0xfa 0xff 0x06 0x00 0x00 nbytes:7
    0x01 0x00 0xf8 0xff 0x07 0x00 0x00 nbytes:7
    0x01 0x00 0xf7 0xff 0x07 0x00 0x00 nbytes:7
    0x01 0x00 0xf5 0xff 0x09 0x00 0x00 nbytes:7
    0x01 0x00 0xf4 0xff 0x08 0x00 0x00 nbytes:7