# Host Dual Port

## Overview

This example project shows two USB ports as Host. Which support HID class(Keyboard and Mouse) and MSC class(Filesystem format: FAT).

## Board Setting

- Connect a USB port on PC to the PWR DEBUG port on the development board with a USB Type-C cable
- Connect a USB port on the development board USB0 with a USB Type-C convert Type-A cable
- Connect a USB port on the development board USB1 with a USB Type-C convert Type-A cable

## Running the example

- Download the program to the development board to run, and use the serial port debugging assistant to view the output log.
- When the USB0 or UBS1 of the development board is connected with a USB flash disk
    - First, a "cherryusb _msc_test.txt" file will be created in the USB flash drive, and the string "cherryusb fatfs demo..." will be written into the file, with a total of 100 lines or 2500 bytes; Then read out the data of the file, with a total length of 2500.
    - Secondly, it will scan the directories and files under the root directory of the USB drive and print out the directory name and file name.
    - the serial port debugging assistant will display the following data:
    ```console
    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
    ```
- When the USB0 or UBS1 of the development board is connected with keyboard
    - The serial port debugging assistant will display the following data:
    ```console
    [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
    ```
    - When the keyboard is pressed, the data sent by the keyboard will be displayed:
    ```console
    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
    ```
- When the USB0 or UBS1 of the development board is connected with mouse
    - The serial port debugging assistant will display the following data:
    ```console
    [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
    ```
    - When moving or clicking the mouse, the data sent by the mouse will be displayed:
    ```console
    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
    ```