如果你想学习C51的越快，这个资源也许会给你一个帮手。

单片机实现TCPIP协议的完整C源程序 TCP RS232 的应用 分配本地用户自定义服务模式应用TCP端口号-MCU TCPIP protocol complete C source code

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

利用430单片机内部得DA实现的DDS正弦波形产生程序，可以用在对输出波形稳定性很高的场合-430 single-chip internal use of DA may realize the DDS sine wave shape generation process, can be used in high stability of output waveform of occasions

使用AT98S51控制1602液晶显示程序，AT89S51使用12M晶振。

MSP430系列汇编指令集,作为编程时或初学时使用-MSP430 instruction set compilation series, as a beginner programmer or the use of

LT_1B msp430开发板例子程序－TA_15

ch451的使用，遇到问题可以参考 做spi驱动-ch451 use problems can refer to make spi driver

一个AduC845实验板的电路图以及实验源代码-ADuC845 experiment a circuit board, as well as experimental source code

单片机与AD9851控制程序，可输出预置频率正弦波-With the AD9851 single-chip control procedures can be preset output frequency sine wave

使用ATmage8制作的USB下载线，采用软件模拟时序-ATmage8 produced by the use of USB download cable, using simulation software Sequencers