51单片机矩阵键盘的设计与调试，建议使用52单片机。

本文介绍了ISP程序设计方法，以及在SST和STC单片机上的具体实现方法-This paper introduces the ISP programming method, as well as in the SST and the STC on the concrete realization of single-chip approach

最简单的TCP协议栈，只包括ICMP,ARP,TCP/IP等实用功能

基于单片机c8051F020的串行口通信的源程序代码。 -C8051F020 based on single-chip serial port of the source code of communication.

用于61单片机，内含大量的头文件，使用起来很方便-for 61 microcontroller, the first containing a large number of documents, was easy to use

c51 写的常用源码!-common source!

这是我的毕业设计-智能排队系统的操作器源码,上载给大家做参考,希望大家赐教.-This is my graduation design-smart queuing system for the operation of the source code, available to you for reference. We hope that substantive progress.

240128液晶显示的头文件,包括了字符显示子程序与点阵显示子程序-The first liquid crystal display 240,128 documents, including a character display with dot matrix display subroutine subprogram

自己做的STC单片机开发包，非常实用的开发工具-do for myself STC microcontroller development kits, very useful development tool

在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct

AVR串行通信的异步传输模式USART，通过RS232与计算机或者单片机进行串行通信。-AVR serial communication ATM USART, through computer-or single-chip RS232 serial communication.