该程序为51单片机做的频率计,可计频率可达999 HZ.

AVR单片机的TWI（IIC）总线功能驱动函数库，可直接调用本函数库驱动24C08等IIC器件。-AVR microcontroller TWI (IIC) bus function driver functions can directly call this function, database-driven 24C08 devices such as IIC.

单片机AT90S系列 制作简易USB接口（软件模拟,无usb硬件）。installstep- Monolithic integrated circuit AT90S series manufacture simple USB connection (software simulation, non- usb hardware). Installstep

[日期：2005-11-29] 来源：侃单片机 作者：etiller [字体：大 中 小] -[Date :2005-11-29] Sources: McCain Singlechip Author: etiller [Font: Xinhuanet]

这是用192*64液晶实现的波形液晶显示。用的液晶型号是OCMJ4*12B，这是用正弦函数显示的。-This is 192* 64 LCD LCD waveform to achieve. LCD model is used OCMJ4* 12B, which is shown by sine function.

采用AYG-59C GSM MODEM模块，和at89s52的串行口通信。通过at指令控制GSM模块，同时用单片机处理GSM发给单片机串口的反馈信息，实现远程无线控制。-Used AYG-59C GSM MODEM modules, and AT89S52 serial port communications. GSM through at command control module, at the same time deal with single-chip GSM distributed feedback single-chip serial port, wireless remote control.

24C01读写程序，称C51源代码形式：write bit（unsigned char ch）@2001/03/23函数称明：内部函数，私人用户不直接调用。

电子书籍，《单片机的C语言应用程序设计》，很不错的。-electronic books, "SCM C language application design" very good.

单片机控制原理书-MCU control theory book

功能完善的四层电梯程序。开门停8秒，上升或者下降一层用时5秒，有五秒倒计时数码管，楼层显示数码管，以及电梯内外楼层请求显示灯。-A well-functioning procedures for four-storey elevator. 8 seconds to open the door stopped, increased or decreased when a layer of 5 seconds, the 5 seconds countdown digital tube, digital tube display floor, as well as inside and outside the elevator floor indicator lights request.

单片机AT90S系列 制作简易USB接口（软件模拟,无usb硬件）。asm源代码- Monolithic integrated circuit AT90S series manufacture simple USB connection (software simulation, non- usb hardware). Asm source code