这是一段c51编的一段有关串口通讯的代码

此例为单片机串口的应用!将串口外接一个串入并出的数字芯片,可实现在单片机的串口扩展成并口输出功能!-This case the application for the single-chip serial! Will add a string to the serial port and a digital chip can be realized in the single-chip serial port expansion into a parallel port output function!

串口通信PC机应用程序-PC serial communication applications

串口控制程序一般分为查询和中断两者方式。查询方式适用于简单的应用，简单可靠，但是缺点是需要占用处理器资源，在发送或者接收数据的时候不能做其它的事情，处理器利用率低。中断方式下，在发送或者接受数据的时候处理器还可以做其它的工作，效率较高。-Serial control procedures will generally be divided into two way query and interruption. Query applied to simple applications, simple and reliable, but the drawback is the need to occupy processor resources to send or receive data at the time should not make other things, the processor utilization rate. Interrupt mode, the send or accept data when the processor can do other work, more efficient.

RS232.cpp and RS232.h for Serial COM Port Communication

串口通信，上位机可以呼叫下位机的8个设备号，进行数据传输-Serial communication, host computer can call the next crew of the No. 8 device, data transmission

delphi1 的串口通讯控件，经过改进的-delphi1 serial communication control, improved

用于PPC的简单RS232串口通讯小程式，可收发数据！-PPC for a simple RS232 serial communication in small programs, can send and receive data!

利用MSComm控件，不依赖太多硬件设备，指利用纯软件方法侦测串口通信参数设置情况-use MSComm control, do not rely on too many hardware devices that use software-only method to detect serial communication parameters settings

rs232的通讯程序,可以用文本方式定义协议-RS232 communication procedures can be defined as text agreement

VC的COM口驱动程序,使用了ACTIVEX控件-VC COM port drivers, the use of Activex Control