摘要
提出了一种基于ARM7和CPLD架构的数字公交站亭系统。系统通过GPRS模块与公交控制中心实时通信,使用CA认证保证通信的安全性,采用两块SRAM组成具有"乒乓逻辑"的高速缓存确保显示数据的连续性,可实现同一站亭多条线路信息动态显示、实时车辆到站预报、公众信息发布、线路信息及时更新以及系统在线升级等功能,具有实时性好、安全性高,可扩展性强等特点。
A digital bus stop system based on ARM7 and CPLD was proposed. The system was communicated with bus control center real -time through GPRS module, CA certificate was used to ensure the security of communication, and two SRAM composed of a ＂ping-pong logic＂ high-speed cache was used to ensure the continuity of display data. It can realize dynamic display of Multipleline information on the same bus stop, real-time bus arrival forecasting, public information publishing, line information update on time as well as system upgrade on line. Analyses show that the system has good real-time performance, high security and expansibility.
出处
《微计算机信息》
2010年第26期107-108,121,共3页
Control & Automation
