用途

公司或者主机设备没有usb接口，只能使用PS/2接口键盘。此程序完成USB HID keyboard协议向PS/2的scan code set 2转换。

需要的硬件设备

1. arduino uno R3
2. USB Host Shield

使用说明

1. 默认PS/2接口的的四条数据线中，数据段和时钟段连接在Arduino的（4，2）。
2. 使用IDE刷入usb2ps2.ino即可

参考文件

1. USB HID to PS/2 Scan Code Translation Table
2. PS2键盘接口说明
3. 模拟PS/2键盘

Application scenario

The company or host device does not have a usb interface and can only use the PS/2 interface keyboard. This program completes the conversion of the USB HID keyboard protocol to the PS/2 scan code set 2.

Required hardware devices

1. Arduino uno R3
2. USB Host Shield

Instructions for use

1. Among the four data lines of the default PS/2 interface, the data segment and the clock segment are connected to the Arduino (4, 2).
2. Use the IDE to brush usb2ps2.ino

reference document

1. USB HID to PS/2 Scan Code Translation Table
2. PS2 Keyboard Interface Description
3. Analog PS/2 Keyboard