4*4键盘程序，来自msp430系列单片机

51单片机读写SD卡程序，经过测试，已在产品上使用-51 SCM SD card reader program, tested, used in products

MSP 430 计算机USB接口之间的通讯代码-MSP 430 computer communication between the USB interface code

51开发板源程序,74HC595驱动显示程序.在该模块中，共有4位LED，采用74HC595驱动显示.-51 Development Board source, Bit-driven display program. In this module, A total of four LED, using 74 HC595-driven show.

这是一个430的延时程序，能够比较精确的延时n us,或者n ms-This is a delay of 430 procedures, can be more precise delay n us, or n ms

使用protel99软件编辑的原理电路图，希望对各位有助于电路图的学习和开发-The use of the principle of circuit protel99 software editor, in the hope you will help the study and development of circuit

在LED上显示中文汉字的源代码，采用汇编语言，对于入门者帮助很大。-LED display Chinese characters in the source code, using assembly language is very helpful for beginners.

我们实验室智能小车源码，含PID算法等。当然只是一个C文件而已，没有工程，只是提供给大家一个参考-Intelligent Vehicle-source our lab, including PID algorithm. Of course it is just a C file, there is no project, only a reference to the U.S.

32位arm9微处理器S3C2410的定时器测试源代码-32-bit ARM9 microprocessor S3C2410 timer test source code

一篇关于步进电机的细分，驱动，加速，减速的文章。-An article on the breakdown of stepper motors, drives, speed up, slow down the article.

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