由于arm板的键盘扫描程序，c语言编写。

在有线电视中实现程控有源滤波器设计。为了充分利用设备和传输线,需要一种具有频率选择的网络―滤波器,将同一线 路上不同的信号分开,在电视机中也需要不同的滤波器(即选择有用信号,抑制无用信号) 。下面利用8051 单片机与12 位分辨率的DAC1208 数模转换芯片相结合的系统实现时间常数可程控有源滤波器设计,阐述了硬件结构与软件设计-In cable television in the realization of program-controlled active filter design. In order to make full use of equipment and transmission lines, the need for a frequency selective network- filter, the same lines separate different signal in the TV also requires a different filter (ie, choice of useful signals and suppress unwanted signals). Following the use of 8051 and 12-bit resolution digital-to-analog converter DAC1208 chip combining system time constant can be program-controlled active filter design, the hardware structure and software design

电子书籍，《单片机的C语言应用程序设计》，很不错的。-electronic books, "SCM C language application design" very good.

该文件为研究ps/2协议在鼠标、键盘中的应用。-to study the document ps/2 agreement in the mouse, keyboard of.

独具一格，只用一个I/O资源就可测出常用的NEC格式IR 遥控码-a unique and use only one I/O resources can be used to measure the NEC format IR remote control code

PIC18xx单片机源代码 中断应用里程-PIC18xx SCM application source code interrupted mileage

本人学习51时老师的课件。供学习51的朋友参考学习.-for study 51 reference.

一个基于AT89C51SND1C的硬盘MP3（原理图+源代码+实物照片） -AT89C51SND1C a hard disk-based MP3 (diagram source code-kind photos)

8051-led light-..........................................

数模转换器和模数转换器在单片机系统中的应用：AD转换器和DA转换器在MCS-51系列单片机系统中的应用-DAC and ADC in Single Chip System: AD converters and DA converters in the MCS-51 Series Single Chip System

电动机pid控制的源码（算法），具有比较规范的数据结构，例外很好地应用了pid控制算法。-Motor pid control of the source (algorithm), with a standard data structure, exceptions to the application of good pid control algorithm.