基于增强型16C550标准的RS-485总线的设计与实现  

Design and Implementation of RS-485 Serial Bus Based on Enhanced 16C550 Standard

作　　者：邵奎[1] 卜雄洙[1] 吴键[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《仪表技术》2011年第10期1-3,6,共4页Instrumentation Technology

基　　金：南京理工大学自主科研项目(2010ZDJH11)

摘　　要：介绍一种基于RS-485的高速串行总线系统的设计与实现。系统利用CortexM3系列的LPC1756单片机控制一个I2C/SPI转UART的桥接器件XR20M1172,再将XR20M1172的UART管脚连接到高速的RS-485收发器SP3485上,以实现速度高达10Mbit/s的RS-485通信。The design and implementation of a high-speed serial bus system based on RS485 is introduced in this paper.To active a RS485 communication which speed is up to 10Mbps,the LPC1756 of Cortex M3 series is used in this system.A bridge device XR20M1172 which is an I2C/SPI UART transfer has been controled by this MCU and the UART pins of XR20M1172 has been connected to a high-speed RS485 receiver and transmitter SP3485.

关 键 词：RS-485 CortexM3 高速串行总线 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]