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基于cpld的出租車自動計價系統(tǒng)的設(shè)計(已修改)

2024-11-26 03:53 本頁面
 

【正文】 基于 CPLD 的出租車自動計價系統(tǒng)的設(shè)計 作者姓名: 李 剛剛 專業(yè)名稱: 信息工程 指導(dǎo)教師: 大學(xué) 講師 基于 CPLD的出租車自動計價系統(tǒng)的設(shè)計 I 摘 要 隨著電子行業(yè)的迅猛發(fā)展 , 計 價 器在各個領(lǐng)域中的使用越來越頻繁 , 用戶對計 價 器的要求也越來越高。以出租車多功能計 價 器為例 , 用戶不僅要求計 價 器性能穩(wěn)定 , 計費準(zhǔn)確 ; 不同國家和地區(qū)的收費方式存在差異 , 即使在同一地區(qū) , 不同車型的出租車其收費方式也有差別 , 而且出租車還面臨幾年一次的調(diào)價或調(diào)整收費方式等問題。 傳統(tǒng)的基于單片機設(shè)計的出租車多功能計 價 器已遠(yuǎn)遠(yuǎn)跟不上這種變化 , 功能升 級很繁瑣 , 需要硬件重組和軟件更新同步進(jìn)行 , 成本高 , 并且每次升級都可能產(chǎn) 生 新的不穩(wěn)定因素 ; 而 本設(shè)計是 基于 復(fù)雜可編程邏輯器件 (CPLD)的出租車 自動 計 價系統(tǒng), 采用超高速集成電路硬件描述語言 VHDL 和邏輯綜合為基礎(chǔ)的自頂向下的電路設(shè)計方法 , 在硬件電路不加改變的前提下 , 功能升級十分方便 ,從使用情況看 , 該設(shè)計穩(wěn)定性好、可靠性高 , 市場前景良好,而且 開發(fā)成本低 , 周期短 , 極大的滿足了用戶的變化要求。 關(guān)鍵詞 : 硬件設(shè)計 CPLD 超高速集成電路硬件描述語言 仿真 基于 CPLD的出租車自動計價系統(tǒng)的設(shè)計 II Abstract Along with the fast fierce development of the electronics profession, charge the machine in each realm of usage is more and more multifarious, the request of customer to the charge machine is also more and more high. To take multifunction charge machine of the rent car as an example, the customer not only request to charge the machine function stability, charge accurate。 the forrent car of different from the charges method existence difference of the region, even in same region, car in different nation type it charges the way but also have the difference, and rent the car to still faces a time fee hikes of several years or adjust to charge the way etc. problem. Traditional according to a machine design of multifunction charge machine of forrent car has already canned not keep up with this kind of variety far and far, the function upgrade is very tedious, needing the hardware reanization to carry on with the software renewal synchronously, the cost is high, and upgrade each time may produce the lately unsteady factor。 but according to programmable logic array( CPLD) of the spot of multifunction charge machine of forrent car, the adoption hardware description language the VHDL and logic is prehensive for basal from the crest get down of the electric circuit design method, Does not change in the hardware electric circuit under the premise, the function upgrade extremely conveniently, looking from the service condition, this design stability good, the reliability is high, the market prospect is good, moreover the development cost is low, the cycle is short, enormous has satisfied the change request of customer. . Key words: Hardware design , Complex Programmable Logic Device, Extremely high soon the integrated circuit hardware description language, Simulation. 基于 CPLD的出租車自動計價系統(tǒng)的設(shè)計 III 目 錄 摘 要 .............................................................. I ABSTRACT .......................................................... II 1 前言 .............................................. 錯誤 !未定義書簽。 課題研究背景 .................................................................................................................. 1 本文所做的工作 .............................................................................................................. 3 2 相關(guān)技術(shù)介紹 ..................................................... 4 CPLD 簡介 ....................................................................................................................... 4 CPLD 的基本結(jié)構(gòu) .................................................................................................... 4 CPLD 的特點 ............................................................................................................. 5 XILINX公司可編程邏輯器件介紹 .................................................................................. 5 XC9500 系列器件結(jié)構(gòu)簡述 ..................................................................................... 5 可編程 CPLD 芯片 XC9572 產(chǎn)品規(guī)格說明 ........................................................... 8 VHDL 語言簡介 ............................................................................................................ 10 VHDL 語言的優(yōu)點 .................................................................................................. 10 使用 VHDL 語言的可行性 ..................................................................................... 12 XILINX FOUNDATION 系統(tǒng)簡介 .............................................................................. 12 3 出租車自動計價系統(tǒng)的設(shè)計 ........................................... 13 系統(tǒng)基本設(shè)計思想及實現(xiàn)的功能及要求 .................................................................... 13 系統(tǒng)基本設(shè)計思想 .................................................................................................. 13 系統(tǒng)實現(xiàn)的功能及要求 .......................................................................................... 13 系統(tǒng)硬件設(shè)計 ................................................................................................................ 14 外圍 電路介紹 .......................................................................................................... 15 系統(tǒng)軟件設(shè)計 ................................................................................................................ 19 電子鐘程序設(shè)計 ...................................................................................................... 19 計價部分程序設(shè)計 .................................................................................................. 20 程序仿真圖 .................................................................................................................... 27 結(jié) 論 ............................................................ 31 致 謝 ............................................................ 32 參考文獻(xiàn) ........................................................... 33 基于 CPLD的出租車自動計價系統(tǒng)的設(shè)計 IV 附錄 A(系統(tǒng)程序) .................................................. 34 基于 CPLD的出租車自動計價系統(tǒng)的設(shè)計 1 1 前言 課題研究背景 當(dāng)今社會是數(shù)字集成電路廣泛應(yīng)用的社會。 數(shù)字集成電路由早期的電子管
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