Siemens s7comm.rar the communication process with the pc

用vc实现的上位机串口通讯程序，经过调试实现了与单片机的通讯（usb）-vc communication program in usb series with singchip ,

RK4000通讯协议.-RK4000 communication protocol.

该程序实现了串口之间的相互通信，是异步串口通信，可以设置串口号-Implementation of the procedures between the serial communications, serial communication is asynchronous, the classic experimental procedures for computer networks

Advantech Driver Demo: Interrupt Data Transfer

一个C＋＋语言编写的程序，看后你不会后悔-a C++ language to develop the procedures that you will not regret it later

自己编写的串口通信上位机。一直工程在用，其中的发送数据我已经做了修改！-the programme of serial communication

6017FM在山景音响初始化程序，效果很好！-6017FM in Mountain View, audio initialization procedure, good results!

串行数据标准选用之我见 RS-232、RS-422与RS-485标准及应用 转换器的构成 -Selection of serial data standards, I see the RS-232, RS-422 and RS-485 standards and the application of the composition of converter

串口调试工具，在Visual Basic6.0中实现-Serial port debugging tool, implemented in Visual Basic6.0

本串行通信程序利用汇编语言通过BIOS中断调用和DOS功能调用实现PC机双机串行通信。其中，上位机和下位机串行口均为辅串口COM2（口地址为2FXH），对外用9针连接器与令一台PC机连接；BIOS通过“INT 14H”4个中断服务子程序，分别完成串口初始化编程、发送一帧数据、接受一帧数据以及测试通信线状态。本程序分为PC机串口自动测试程序（目的是测试串口好坏）和PC机全双工双机通信程序两个部分。-the serial communications procedures through the use of assembly language BIOS interrupt calls and function calls DOS PC Dual Serial Communication. Among them, PC and the next crew will be supplemented by serial port Serial COM2 (I address 2FXH) external with 9-pin connectors and enable a PC connection; through the BIOS "INT 14H," four interrupt service routines, complete serial port initialization programming, Send a data receiving a data communications test and the state line. The procedures are divided into PC serial automatic test procedure (for the purpose of testing Serial good or bad) and full-duplex PC-machine communication program two parts.