freescale MC9S12XS128 PWM

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.

电网参数的测量和检测，如何运用VHDL语言设计采集数据控制器，-Grid parameter measurement and testing, how to use VHDL design language acquisition data controller,

一个红外线遥控接收装置的图纸,协议和说明,以及具体所使用的芯片和编程资料,自己先顶1下~-an infrared remote control devices to receive the drawings, agreements and notes and the specific use chips and programming information, their first under one roof ~

一个用LINUX GTK开发的嵌入式浏览器-LINUX GTK with the development of an embedded browser

pos机contactless源码，c语言-pos machine contactless source, c language

开发试验箱的原理图，从事硬件开发的同学可以看看 一定会获益匪浅-The development of chamber of the schematic diagram, the students engaged in hardware development will certainly benefit can look at

U盘功能实现从枚举到具体功能的实现作了具体的介绍，是U盘学习较好的入门资料-make u disk realize

一个漂亮-A beautiful

单片机实现语音控制小车电路原理图和1个设计的文档说明,相信对想做语音控制的朋友很有帮助-MCU voice control car circuit schematics and a design document that voice wants to believe that the right to control the helpful friends