USB communications source code, the entire Internet, downloading re

SIEMENS西门子S7-200PPI通讯协议-SIEMENS Siemens S7-200PPI communication protocol

This is the free RTOS on PIC24.

串品通讯 内置MODBUS协议与GSDCS协议 -uartport include modbus and gsdcs

LPC23XX，485通信，下载后可直接使用。-LPC23XX, 485 communications, can be directly used

VC实现串口通信例程 VC实现串口通信例程 VC实现串口通信例程 -VC serial communication routines VC serial communication routines VC serial communication routines VC serial communication routines VC serial communication routines VC Serial Communication routines

串行口是计算机一种常用的接口，具有连接线少，通讯简单，得到广泛的使用。常用的串口是RS-232-C接口(又称EIA RS-232-C)它是在1970年由美国电子工业协会(EIA)联合贝尔系统、调制解调器厂家及计算机终端生产厂家共同制定的用于串行通讯的标准。它的全名是"数据终端设备(DTE)和数据通讯设备(DCE)之间串行二进制数据交换接口技术标准"该标准规定采用一个25个脚的DB25连接器，对连接器的每个引脚的信号内容加以规定，还对各种信号的电平加以规定。传输距离在码元畸变小于4%的情况下，传输电缆长度应为50英尺。 　　Linux操作系统从一开始就对串行口提供了很好的支持，本文就Linux下的串行口通讯编程进行简单的介绍.-computer serial port is a common interface, with connecting lines, simple communications, to be widely used. It is commonly used serial RS-232-C interface (also known as the EIA RS-232-C) it is in 1970 by the American Electronics Industry Association (EIA) Joint Bell System, a modem manufacturers and computer terminal manufacturers developed for serial communication standards. Its full title is "data terminal equipment (DTE) and data communications equipment (DCE) between serial binary data exchange interface technology standards," the use of a standard 25 feet to the DB25 connector, the connector pin of each signal content requirements, but also the right signal--

vc++6.0写的串口操作的类-vc 6.0 write operation of the serial category

开发工具EmbeddedVC++4.0,GPRS网络接入源代码，WinCE环境-development tools EmbeddedVC 4.0, GPRS network access source code, WinCE

利用西门子的GSM芯片（TC35）的手机模块实现短信的读写，该手机模块可以加入SIM卡，然后就跟手机一样使用了，程序可以通过串口进行控制-The programme use GSM CMOS chip(TC35) module to read and write short message, you can insert SIM card into this module, then it can work as ordinary Mobile phone,the programme can control the module through com port.

串口程序，通过开发工具，与超级终端做模拟传输，检测程序的合法性-Serial procedures, through the development of tools, and to do simulation HyperTerminal transmission, testing the legality of the procedure