1、 I 摘摘 要要 该系统利用 VHDL 语言、PLD 设计出租车计费系统,以 MAX+PLUS软件作为开发平 台,设计了出租车计费器系统程序并进行了程序仿真。使其实现计费以及预置和模拟汽 车启动、停止、暂停等功能,并动态扫描显示车费数目。 关键词关键词: 出租车计费器;计数器;VHDL 语言;MAX+PLUS; II Rental car fare register system designRental car fare register system design Student: YANG Youtian Teacher: LIU Yaoming AbstractAbstract:Thi
2、s system using the VHDL language, PLD design rental car costs the system, develops the platform by the MAX+PLUSsoftware achievement, has designed the rental car fare register system program and has carried on the procedure simulation. Causes its realization to cost as well as the initialization and
3、the simulation automobile starts, stops, function and so on suspension, and dynamic scanning demonstration fare number. Key wordKey words s: : The rental car costs the system; the counter; the VHDL language; MAX+PLUS II; III 目目 次次 摘要摘要 AbstractAbstract 1 1 引言引言1 1.1 设计背景1 1.2 EDA 发展概况2 2 2 出租车计费系统的设计出租车计费系统的设计7 2.1 出租车计费设计7 2.2 基本设计思想7 3 3 出租车计费系统的实现出租车计费系统的实现8 3.1 系统的总体框图8 3.2 程序流程图9 3.3 系统各功能模块的实现10 3.3.1 模块 JIFEI 的实现10 3.3.2 模块 X 的实现