多种通信网络及接口转换模块的研制-计算机工程.PDF

35 6 2009 3 Vol.35 No.6 Computer Engineering March 2009 ·· 2009 A TP919 1,2 1 3 (1. 100012 2. 100049 3. 100012) LPC2368 SOC RTL-RTX CAN ()USB RS232, RS422 RS485 LPC2368 Development of Multiple Communication Networks and Interfaces Conversion Module 1,2 1 3 HU Xin-hua , DENG Yuan-yong , WANG Xian-ping (1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049; 3. Beijing Xinxi Embedded System Design House, Beijing 100012) AbstractFor the needs of communication between a variety of communication networks and interfaces in the same network which coexist in large-scale systems, a conversion module which supports communication between a variety of communication networks and interfaces is developed based on LPC2368 and the real time operating system of RTL-RTX. The module supports the communication between Ethernet, serial network, CAN(fieldbus network) and USB, as well as RS232, RS422 and RS485 communication interfaces. The limit conditions to use the conversion module are pointed out based on the quantitative analysis for the conversion rate in the network wire-speed. Key wordsLPC2368 microcontroller; communication network; line-speed 1 RS232/RS422/RS485CAN RS232, RS422, RS485 USB (CAN) RS-232 RS-422 3M 10