用单片机的I/O口象检测按键那样对其进行查询计数，在旋转速度较慢时，可以对其计数...

使用89S52为核心做的USB键盘,注意修改了一下windows设备描述符以及端点处理等就行了。用了一个4*4的小键盘,有0-9十个数字键, Num Lock键,Caps Lock键,Shift键,Ctrl键,Alt键,回车键等。 最多可以有三个键同时按下，如果相交的话，最多只能两个键按下-89S52 use as the core of the USB keyboard to do, pay attention to modify the look and the windows device descriptor, such as treatment endpoint on the list. Used a 4* 4 small keyboard, has the number keys 0-9 10, Num Lock keys, Caps Lock key, Shift key, Ctrl key, Alt key, enter key and so on. Can have up to three keys pressed at the same time, if the intersection, then a maximum of only two keys pressed

Documents and SettingsAdministrator桌面wangluojiaoxuesheji.rar-Documents and Settings Administrator Desktop wangluojiaoxuesheji.rar

这是5045的程序-procedures

这是一个c8051F020单片机通讯程序，请各位大侠，看了后多提宝贵意见。-C8051F020

protues仿真的51单片机做的推箱子游戏，液晶屏实现。-protues Simulation 51 microcontroller to do Sokoban game, LCD screen to achieve.

红绿灯模拟C程序，用于51单片机，用keil编译，适合二次开发。-Traffic simulation program for C compiler, 51 SCM keil, suitable for secondary development.

c51写的，数码管显示以及键盘接口专用控制芯片芯片BC7281与MCU串行通信的解决方案的实例程序。在c51里的移植基本不需要改动。-decoder, a digital control display and keyboard interface dedicated controller chips BC7281 and MCU chip serial communications solutions examples of procedures. C51 Lane in the transplant is not needed changes.

网络端口到进程PID 的转换例子。可以显示本机运行的网络进程对应的端口号-network port to the conversion process PID example. Be able to show the machine running the process corresponding to the network port number

学4年来做过的竞赛以及老师的科研项目所积累下来的c51源代码，一共有40-4 years of study done as well as the Teacher of the competition accumulated research c51 source code, a total of 40

使用ISD4004语音芯片与单片机连接，设计的一个任意录音或放音8―16分钟的模块，注解详细。-Use ISD4004 voice chip microcontroller, design an arbitrary recording or playback 8-16 minute modules, detailed annotations.