VB 通信开发源代码例子 聊天客户端，服务器端代码

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.

ISO 13239为关于HDLC协议的国际标准，详细定义了HDLC的内容，通过该协议可以完成标准的HDLC编程-ISO 13239 for HDLC agreement on international standards, a detailed definition of the content of HDLC, adoption of the agreement will be completed standard HDLC Programming

有关QPSK调制解调的仿真程序，包括基带输入波形及其功率谱、QPSK调制信号及其功率谱、AWGN信道输出及其功率谱、通过瑞利信道之前和之后的信号星座图 6)在高斯白噪声和瑞利衰落信道条件下的误码性能以及高斯白噪声的理论曲线，所有误码性能曲线在同一坐标比例下绘制-Relevant QPSK modulation and demodulation of the simulation program, including the baseband input waveform and its power spectrum, QPSK modulation signal and its power spectrum, AWGN channel output and its power spectrum, through the Rayleigh channel before and after the signal constellation of Figure 6) in high- Adams white noise and Rayleigh fading channel under the conditions of BER, as well as the theory of Gaussian white noise curve, all the BER performance curve in the same proportion of coordinates under the map

at91r40008 atmel arm 7tdmi 内核的串口驱动源码-at91r40008 ATMEL arm 7tdmi kernel source Serial Driver

资源描述NRF24L01无线模块的使用手册，包含原理图、51单片机源代码、pcb封装等

固网短信编程，固定电话发送端信息，够美的吧!-Fixed message programming, fixed-line telephone to send client information, enough to let the United States!

Linux下消息队列 用于进程间通信，有4个例程，可以实现 1.消息队列是消息的链表,具有特定的格式,存放在内存中并由消息队列标识符标识.  2.消息队列允许一个或多个进程向它写入与读取消息.  3.管道和命名管道都是通信数据都是先进先出的原则。  4.消息队列可以实现消息的随机查询,消息不一定要以先进先出的次序读取,也可以按消息的类型读取.比FIFO更有优势。     目前主要有两种类型的消息队列：POSIX消息队列以及系统V消息队列，系统V消息队列目前被大量使用。系统V消息队列是随内核持续的，只有在内核重起或者人工删除时，该消息队列才会被删除

U-BOOT的启动流程及移植,很适合学习U_BOOT的初学者!-U-BOOT start-up flow and transplantation, it is suitable for beginners to learn the U_BOOT!

用FPGA实现数字低通FIR滤波器，对FIR滤波器的开发有一定的借鉴意义。-Using FPGA digital low-pass FIR filter, the development of the FIR filter has a certain degree of referential significance.

仿真通信系统中QPSK的码头代码，大家可以作为参考-Simulation of Communication Systems pier QPSK code, we can serve as a reference