This code is Kingview software and Yu

USB接口，CH375芯片读写U盘的部分程序段。 检测U盘是否正常工作。-USB interface chip CH375 U disk read and write the part of the process. Detection U-normal work.

QAM调制的基本原理 QAM调制实际上是幅度调制和相位调制的组合。相位 + 幅度状态定义了一个数字或数 字的组合。QAM的优点是具有更大的符号率，从而可获得更高的系统效率。通常由符号率 确定占用带宽。因此每个符号的比特（基本信息单位）越多，效率就越高。-QAM modulation of the basic principles are in fact QAM modulation amplitude modulation and phase modulation of the portfolio. Phase+ margin status defines a combination of numbers or figures. The advantage of QAM symbols are greater rate, thus the system efficiency will be higher. Symbol rate is usually determined by the occupied bandwidth. Thus each bit symbols (basic units of information) the more the higher the efficiency.

资源描述com原理与应用书及源码，网上大都不全这是比较完整的-Theory and Application of com books and source code, on-line most of which is a more complete incomplete

一份很不错的Linux/Unix环境下makefile文件写法说明文文档-a very good Linux/Unix environment makefile note written text document files

这是Remon Spekreijse写的一个串口类，功能十分强大！-Remon Spekreijse This is written in a serial type, function is very powerful!

使用Fax Modem发送传真的程序 -Using FAX Modem to send fax

SL030,13.56M微小型读写模块说明文档,天线与模块集成到一块小板-SL030, 13.56M micro and small to read and write documentation module, antenna and module integrated into a small plate

线性反馈移位寄存器Verilog源程序，能够产生伪随机序列-LFSR Verilog source code, to generate pseudo-random sequence

线程的概念、属性；线性创建的2种方式及其联系、区别和使用场合；线程的生命周期和5种状态；线程状态控制的一般方法；线程同步的概念、原理；线程同步的场合、线程同步的条件、同步对象的选取；线程间通讯的概念，与线程同步的区别；notify和wait的使用方法。两类socket通信的概念、特点、应用场合；两类socket通信的客户和服务端的基本步骤；组播通信的概念、组播客户端服务端的基本结构。-threads concept attribute; The creation of two linear models and their connections, and the use of different occasions; Threads of the life cycle and five state; Thread the general state control; Thread synchronization concept, principle; Thread Synchronization occasions, thread synchronization, the synchronization like the selection; Thread the concept of communication, and synchronization of different threads; notify the wait and use. Two types of socket communication concept, features, applications; Two types of socket communication and customer service side of the basic steps; The concept of multicast communication, multicast client services side of the basic structure.

介绍串口通讯的几个例子。从中选取自己需要的。-Introduce a few examples of serial communication. Selected their needs.