VB与三凌PLC通信. 好适就数据召唤使用.也是学习串通信编程好例子....

serialport 监听软件，可以监听串口的数据-serialport monitoring software can monitor the serial data

Windows下的串口程序示例-a serial program example under Windows OS

RS232 C51的通讯程序,根据自己的需要稍做修改,就可以使用了.-RS232 C51" s communication procedures, according to their own needs minor changes, you can use.

modbus rtu 通讯 使用spcomm控件-modbus rtu protocl use spcomm activX

串口调试精灵，可以收发ASCII和HEX两种格式的数据，简单实用。-serial debugging genies, TX ASCII and HEX both formats of data, simple and practical.

投篮运球综合是运用单片机技术设计的一个易于算投篮个数的发明，该程序是为此而设计-shot dribble integrated microcomputer technology is the design of an easy shot count the number of inventions, the program is designed for this purpose

语音de 椅子 好学习大-voice de studying the big chair

C51单片机串行口中断服务程序2,is used-C51 monolithic integrated circuit serial mouth interrupt service isr 2, is used

这是一个串口监视程序，能够很好的调试串口并监视串口数据。-This is a serial surveillance procedures to good serial debugging and monitoring serial data.

用于VC的DLL库，使用异步通讯方式，具体使用方法请看源码-for VC DLL libraries, the use of asynchronous communication and the use of specific methods Look at source