# HID Host

## 概述

本示例工程展示USB HID HOST

## 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端口和HID设备，如鼠标和键盘

## 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

### 接键盘

- 开发板USB0端口接入键盘时，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：
```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
```

### 接鼠标

- 开发板USB0端口接入鼠标时，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：
```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
```