本程序是4位七段显示、3x3键扫实验，正确无误。

51单片机P2口接4*4键盘的行线和列线；红灯亮时进行频率输入；绿灯亮时进行占空比输入；频率值暂定在100到60KHZ之间；输入频率和占空比时要输够六位整数，不够的在前面补0；占空比以百比数（0-100）形式存在。-51 Singlechip P2 mouth then 4* 4 keyboard line and column line red light when the frequency of input green when the input duty cycle frequency value is tentatively scheduled for between 100 to 60KHZ input frequency and duty than enough to lose six integers, not enough to fill in front of 0 duty cycle than a few hundred (0-100) form.

单片机模拟串行通讯程序at89c2051串口,经KEIL测试OK。-microcontroller simulation serial communication program at89c2051 serial, KEIL tests OK.

关于msp430单片机的源代码，里面有很多比较有用的实例讲解，可以很好的利用，特别是对于初学者，是很好的资料-Msp430 microcontroller on the source code, there are many more examples of useful explanations, can be well used, especially for beginners, is a very good information

使用PIC16F628和U2280构建的门禁控制机,有原理图-use PIC16F628 and U2280 Access Control Construction machine, a schematic diagram

在80C51上用汇编语言实现的数字钟程序，具有闹铃、秒表和设置时间等动能。-80C51 used in assembly language procedures for the realization of the digital clock with alarm, stopwatch and time settings, such as kinetic energy.

基于PIC单片机的IC卡读写器的设计，以pic167c4单片机为核心的IC卡读写器的设计-PIC microcontroller-based IC card reader designed to pic167c4 microcontroller core of the IC card reader design

keil c51实现的串口程序仿真,C51单片机串口编程实例.非常不错!-Keil decoder serial procedures to achieve the simulation, C51 microcontroller serial programming examples. Very good!

基于AVR单片机mega8的电表c源程序（第五部分，存储记录电能数据，读取脉冲量，及其他）-Based on the AVR Microcontroller mega8 meter c source code (part V, storing records energy data, read the pulse volume, and others)

利用VC提供所的MSCOMM控件实现了单片机和微机之间的串行通信，经调试已经成功-VC to provide the use of MSCOMM control and realize the single-chip serial communication between microprocessor by commissioning has been successfully

基于PIC16F877单片机的256*64的TC6963C点阵液晶显示屏的IAR Embedded C complier的控制程序。包括多种图形和文字输出。-IAR Embedded C source codes for TC6963C based dot matrix LCD interfaced with PIC16F877 uP. Includes text display and a few graphics as well.