摘要
介绍单片机和CPLD在公交车内LED广告屏中的应用设计。单片机将点阵码写入双口RAM后可处理其它事务,只要向CPLD发出扫描触发指令,扫描工作将由CPLD硬件负责,实现了由单片机软件到CPLD硬件的转变,大大提高了扫描频率和CPU的处理能力。
This paper introduces the design of the application of Single-chip computer and CPLD in LED display screen of transit vehicle information.The Single-chip computer can process other things afte it writ-es the lattice code into double ports and common RAM.The hardware of CPLD will accomplish scanning if the triggering command is sent to CPLD.The change from the software of Single-chip com puter to the hard-ware of CPLD is realized.The scanning frequency and the processing ability of CPU are improved.
出处
《河南科技学院学报》
2008年第4期65-70,共6页
Journal of Henan Institute of Science and Technology(Natural Science Edition)
基金
河南省教育厅科技攻关项目(2007480001)
