【正文】 , easy to upgrade and repeated use of VHDL language design Key Words: CPLD, VHDL, Taxi fare Registers 1 課題背景 隨著城市的發(fā)展，出租車行業(yè)發(fā)展迅速，出租車的附屬品也應(yīng)運而生。 關(guān)鍵字 :CPLD,VHDL,出租車計費器 Abstract: In order to reduce design cost taxi billing system, accounting standard, this paper introduces a CPLD chip taxi meter design method, described the research significance and application value。畢業(yè)設(shè)計論文 基于 CPLD 的出租車計費器系統(tǒng)設(shè)計 摘要 ： .......................................................................................................................................... 2 Abstract: ....................................................................................................................................... 2 .......................................................................................................................................... 1 ......................................................................................................................... 1 國內(nèi)外研究現(xiàn)狀及趨勢 ................................................................................................... 1 ............................................................................................................... 1 、 VHDL介紹 ....................................................................................................................... 1 CPLD現(xiàn)狀及發(fā)展 ............................................................................................................. 1 CPLD的結(jié)構(gòu)與特點 ......................................................................................................... 2 CPLD基本結(jié)構(gòu) ...................................................................................................... 2 CPLD的特點 ......................................................................................................... 2 VHDL設(shè)計優(yōu)點 ................................................................................................................ 3 ................................................................................................................. 3 ................................................................................................. 3 .................................................................................................... 3 總體框架設(shè)計 ....................................................................................................... 3 ............................................................................................. 4 速度模塊 .............................................................................................................. 4 計程模塊 .............................................................................................................. 4 計時模塊 .............................................................................................................. 5 計費模塊 .............................................................................................................. 5 ............................................................................................................................ 6 整體電路圖 ..................................................................................................................... 6 電源電路 ........................................................................................................................ 6 啟動 /停止按鍵電路 ........................................................................................................ 6 自動清零部分 ................................................................................................................. 7 ................................................................................................................. 7 QuartusⅡ軟件介紹 ........................................................................................................ 8 ......................................................................................................................... 8 ............................................................................................................... 8 ........................................................................................................ 9 ..................................................