詳細介紹工控軟件組態王與單片機多機串口通訊的設計原理。分析組態王提供的直接與單片機串口通信方法的優點,給出系統基于RS-485總線傳輸的接口電路原理圖。根據組態王提供的通訊協議和單片機多機串口通訊的原理,給出程序設計流程與思路。
Abstract:
In this paper,the design principle of communication between multi-SCM and KingView by serial ports is described in detail.We analysis the advantage of method supplied by KingView,by which KingView can communicate with serial ports of SCM directly,and provide the system’s interface circuit based on the RS-485transmission line.We provide flow diagram of programming and thinking on the basis of communication protocol supplied by KingView and principle of communication among multi-SCM through serial ports.
實時時鐘是微機保護裝置的重要部件,在討論PCF8583結構與功能的基礎上,提出采用dsPIC33F系列微處理器與串行I2C時鐘PCF8583的接口設計方案,給出了相應的接口電路與軟件流程。該設計方案結構簡單,可靠性高,開發周期短,具有一定的實用與參考價值。所設計的微機保護裝置已投入現場運行,效果良好。
Abstract:
Real-time clock chip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583,a new interface scheme which uses dsPIC33F microprocessor and serial clock chip(I2C)PCF8583is proposed.The method of the circuit design and the main software flow are introduced in this paper.The scheme has simple structure,higher reliability and shorter exploitation cycle,so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
介紹了基于單片機C8051F020的通用串口適配器的設計與實現方法,即由單片機控制的智能化一對多口收發信號轉換器。通過采用C51對單片機進行編程,控制與RS-232(標準RS-232電平)、RS232(TTL電平)、RS-422接口的數據通信;采用C++ Builder作為開發平臺,通過RS-232接口實現上位機對適配器各個通信端口的控制。
Abstract:
Design and realization of a universal serial port adapter based on the MCU C8051F020 are introduced.The adapter is an intelligent one-to-more receiving and transmitting signal converter controlled by the MCU. By programming the MCU with the language C51,MCU control data communication between the MCU and RS-232(RS-232 level),RS-232(TTL level),RS-422 port; Using C++ Builder as the development plane, by one RS232 port, the upper PC can control each of the communication port of the adapter.