4.35. Host Dual Port

4.35.1. Overview

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

4.35.2. 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

4.35.3. 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:
```
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:

[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:

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:

[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:

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