液晶显示驱动程序，可以使用4键盘控制，并能显示结果

这是一个ARM的实验。主要是使用PWM6输出一个固定占空比的单边沿控制PWM信号，通过滤波电路实现DAC转换。使用ADS1.2开发环境-ARM experiment. PWM6 mainly use a fixed duty cycle output of single-edge PWM control signal, filter circuit DAC conversion. ADS1.2 use development environment

该源码是创维特ARM7 JX44B0X板的例子程序，可以让你很快熟悉该板并熟悉ARM编程。开发工具为ADS1.2-The source is SKYWORTH special board ARM7 JX44B0X example program that lets you quickly familiar with the board and are familiar with ARM programming. Development tools for ADS1.2

应用背景此应用程序是使用控制的感应电机的速度，使用粒子微控制器。我们用单片机16F877A和PIC C编译程序。双向可控硅是用来调节器和心脏之间的电压流用于触发双向可控硅。高电压而言，所以我们用DIAC，可控硅半瓦的可变电阻来控制速度。关键技术我们用嵌入式编程来监测和控制在工业应用中被广泛使用的感应电机的速度。电子装置被用来控制马达的速度。微控制器是用来提供一个脉宽调制脉冲，以增加或减少电机的速度，通过调节输入电压源

学习AVR C语言编程的入门与提高的经典书籍，喜欢的朋友可以-AVR C programming language learning portal with the improvement of the classic books, like our friends can see

arm精简指令集，对于嵌入式的开发人员有极大的帮助，可方便查阅许多常用的指令 -arm reduced instruction set, for embedded developers a great help to facilitate access to many commonly used commands

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.

本例为嵌入式linux平台下的串口开发实例，开发原始平台为华恒HHPPC860-3COM-2ETH-R1，可根据需要进行修改。-the cases for embedded Linux platform under development Serial example, development of the original platform for huaheng HHPPC860- 3COM- 2ETH-R1, may need to be modified.

一种触摸按键驱动芯片的驱动代码与HL5239兼容。使用中断方式进行按键触发信息接收-A touch button driver driver chip code-compatible with the HL5239. Approach to the use of interrupt trigger button to receive information

时序电路描述-Description of sequential circuits

it is character driver -driver