用并口模拟I2C总线的源码

在嵌入式Linux系统上的jffs22文件系统的制作-in Embedded Linux System of jffs22 document production system

用单片机控制键盘的程序,利用中断获得键盘扫描码并转换为ASCII码，在1602液晶上显示字符。C语言编写，KEIL环境下编译，键盘驱动写得相当好。-Single-chip microcomputer to control the keyboard with the procedure, the use of interrupted access to the keyboard scan code and converted to ASCII code, in the 1602 character LCD display. C language, KEIL compiler environment, keyboard-driven written a very good job.

使用msp430f149io口模拟i2c协议，驱动液晶屏，使其显示汉字，使其显示图片

uda1341驱动 linux2.4.18 有详细注释 注意编译时配置文件需要自己添加 -Notes uda1341 drive linux2.4.18 detailed attention to compile-time configuration file may need to add

实现1到100的累加计算，熟悉IDE环境下的C语言的编写。-1-100 realize the cumulative terms, familiar with the IDE environment the preparation of C language.

Allen-Bradley通讯 232-485 源程序-Allen-Bradley communications source 232-485

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.

《嵌入式Linux应用开发完全手册》样章- Embedded Linux application development, fully manual sample chapter

RS RS-232 至RS RS-485 RS RS-422 智能转换器-RS RS-232 to RS RS-485 RS RS-422 Intelligent Converters

基于TMS320F2812的工控实时时钟，简单实用。-TMS320F2812-based industrial control real-time clock, simple and practical.