基于单片机步进电机控制正反转，减速以及加速的源代码

本文介绍了如何用AD识别用户输入的键盘的方法，较之点阵识别有其不可替代的优势；因为如果用4*4的话须消耗8个I/O口，而如果系统有AD功能的话就可能轻松解决了。 单片机8051F330发给ARM然后发给电脑。 其原理就是利用电阻的分压，按键时产生不同的电压，再用中断快速读取电压；然后对其进行编码，通过串口软件EASYARM在个人电脑里显示；经实验观察，效果还可以。 -This article describes how to use AD to identify the user s keyboard input methods, compared with dot-matrix recognition has its irreplaceable advantages because if we use 4* 4, then to be consumed eight I/O port, and if the system function in AD, then on may be easily resolved. Singlechip 8051F330 distributed computer and then distributed to ARM. Its principle is to use the sub-ballast resistor, when keys have different voltage, and then quickly read voltage interruption then encode, through the serial port software EASYARM in the personal computer display by experimental observation, the effect can also be.

QRCODE二维码作者开源的生成及解析的源码，可以移植到单片机上，纯C编写，库的接口使用起来非常方便，说明也很详细。

Embedded_source_code-for Pic controllers

uclinux下的一个窗口显示程序-Basis of a window display program

DS1302 万年历 驱动程序，由89S52作为主控芯片。-Calendar DS1302 driver, by the 89S52 chip as the master.

嵌入式数据库SQLITE,含移植到ARM_LINUX的说明-SQLITE embedded database containing transplanted to the note ARM_LINUX

温度传感器18B20(数码管显示）开发平台为WINAVR-Temperature sensor 18B20 (digital display) development platform for WINAVR

CAN Library for ST10F269 including Document.

sunsang的 s3c44b0的中文手册（请多 指教）