通过USB接口芯片CH375实现模拟HID类USB键盘，通过CH375的外部固件模式，最大的特点是不需要安装驱动，即插即用，并且可连续发送数据，可以在txt文本中查看。我改进了上传数据的函数，使得此改变传递参数的值能直接控制PPT.-CH375 through the USB interface chip analog HID class USB keyboard, external firmware mode by CH375, the biggest feature is the need

usb与RS232之间的通信，包括主机程序，固件源程序。采用HID类！我现在需要USB键盘方面的源程序-Usb and RS232 communication between host program, including the firmware of the source program. The HID class!!!!! Now I need a USB keyboard aspects of the source program

Windows 2000 USB+PS/2 Keyboard Encoder-The HT82K629A can function both in USB and PS2 interface environment. For PS2 interface, it supports IBM PC/AT, IBM PS/2 and all compatible machines and provides a 16-character first-in-first-out buffer in