根據(jù)智能儀表網(wǎng)絡(luò)化的要求，提出了基于Java 和工業(yè)以太網(wǎng)協(xié)議實(shí)現(xiàn)智能儀表通信的方案。根據(jù)51 單片機(jī)資源狀況，對(duì)TCP/ IP 協(xié)議作了有針對(duì)性的簡(jiǎn)化，選用適用51 單片機(jī)的ODP 數(shù)據(jù)報(bào)協(xié)議。給出了以太網(wǎng)接口芯片RTL8019AS 于單片機(jī)的接口電路，
對(duì)通信協(xié)議、數(shù)據(jù)結(jié)構(gòu)下位機(jī)C - 51 通信程序和上位機(jī)Java 程序的設(shè)計(jì)作了示例。方案的實(shí)現(xiàn)，使得在一種平臺(tái)下編寫(xiě)的智能儀表驅(qū)動(dòng)程序可無(wú)須修改地移植到其他平臺(tái)下運(yùn)行，提高了設(shè)備的兼容性。
關(guān)鍵詞以太網(wǎng)TCP/ IP UDP Java 智能儀表單片機(jī)
Abstract In accordance with the requirements of networking intelligent instruments，the strategy of implementing communication between intelligent instruments
based on Java and industrial Ethernet protocol is stated. Aiming the resource status of 51 single chip computer，the TCP/ IP protocol is simplified.
The UDP datagram suitable for 51 single chip computer is selected. The interfacing circuit between Ethernet interface chip RTL8019AS and single
chip computer is given. The design of communication protocol，data structure，C - 51 communication program in slave computer，and Java program in
master computer is illustrated. From this implementation，the drive program for intelligent written under one platform can be transplanted into other platforms
without modification，thus the compatibility of the equipment is enhanced.
Keywords Ethernet TCP/ IP UDP Java Intelligent Single chip computer