realized Modbus RTU communication protocol COM

这个是用串口下载文件到交界处单片机的代码，而且可以用单片机接收数据用于显示，我们自己使用的工具的-serial download files to the junction of microcontroller code, and SCM can be used for receiving data, we use the tools

vb串口程序，写的是一个串口使用例程，对初学者有用，特别是工控类的-vb serial procedures, to write a serial port using the routines, useful for beginners, especially the industrial category

这个是8253芯片的两个实例程序，对学习接口的人是有一定帮助的-this is the 8253 case of two procedures, to learn the interface are certainly helpful

对要进行网络编程和串口编程的人员有很大帮助。-right to network programming and serial programming staff is very helpful.

本程序是针对特定GPS接收机--JAVAD公司的legacy的一个应用，用来收取标准的NMEA-1083GGA信息或JPS格式（JAVAD公司的特有GPS信息格式）的{RT，PO}信息，并统计数据大小与经历时间。本程序用VC6.0+串口控件MSComm实现，其中关于如何在数据长度不定的情况下实现数据帧的同步的方法可以借鉴到其它串口数据采集的应用之中，具备一定的实用价值-this program is targeted at specific GPS receiver-- JAVAD the legacy of an application, used to collect standard NMEA- 1083GGA information or JPS format (JAVAD company"s unique GPS information format) (RT, PO) information and statistical data on the size and duration. The procedures used VC6.0 Serial MSComm control, on how volatile the data length of the data frame synchronization method can draw on to other serial data acquisition applications, to have some practical value

通过串口实现PC机和下位机的通信，用VB。NET来实现-through the PC serial port and the next crew of communications, using VB.NET to achieve

用VB实现RS232接口通信，能和单片机通信的上位机程序。-RS232 interface using VB to achieve communications, energy and single-chip PC communications procedures.

profibus主站及从站源代码，可以作为主从站开发的借鉴-Profibus master and slave source code can be used as a major development from the point of reference

自己写的一个串口类,从CNCOMM改正过来的,精简代码,解决了只能事件方式下只能接收几个字符的问题-Himself wrote a serial type, from CNCOMM mistakes, to streamline the code, solve the incident only way to receive only a few characters in the issue of

用API方式实现串口通信，主要是文件传输功能-Be achieved with the API serial communication, file transfer function is mainly