RS485同步通信。AppWizard has created this RS485Comm application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application.

本例程演示了PC机和智能型仪表如何通过RS485接口进行通信。仪表采用百特公司产XMA5000智能型专家自整定PID调节器，该仪表的通讯协议已经在例程代码中作了详细说明。-The routine demonstration of PC and intelligent instrument through RS485 communication interface. Instrumentation used Nissan Baxter XMA5000 intelligent expert self

本例程演示了PC机和智能型仪表如何通过RS485接口进行通信。仪表采用百特公司产XMA5000智能型专家自整定PID调节器，该仪表的通讯协议已经在例程代码中作了详细说明。该例程非常简单，旨在说明如何在VC++中使用重叠方式读写串口。这个是异步通信，昨天传那个是同步通信。-The routine demonstration of PC and intelligent instrument through RS485 communication interface. Instrumentation