【正文】 功能 ,應(yīng)用前景廣闊。 Trip in charge all the way, have the functions of reset and start, start, start. We can use less by single chip microputer to carry on the design, hardware and appropriate software work together to achieve the design requirements, and flexibility is strong, can be done through software programming more additional features, application prospect. Key words: Microcontroller Digital hall LCD I 目 錄 1 引言 .........................................................................................................................................1 設(shè)計(jì)目的 ..............................................................................................................................1 2 系統(tǒng)設(shè)計(jì)方案 選擇 .................................................................................................................1 單片機(jī)最小系統(tǒng)模塊 選擇 ..................................................................................................2 顯示模塊 選擇 ......................................................................................................................2 方案確定 ..............................................................................................................................3 3 系統(tǒng)硬件電路設(shè)計(jì) .................................................................................................................4 單片機(jī)最小系統(tǒng)設(shè)計(jì) ..........................................................................................................4 液晶顯示模塊 ......................................................................................................................5 按鍵電路 ..............................................................................................................................6 集成開關(guān)型霍耳傳感器電路 ..............................................................................................8 4 系統(tǒng)軟件設(shè)計(jì) .........................................................................................................................9 編程語言 ............................................................................................................................9 軟件設(shè)計(jì)思路 ....................................................................................................................10 程序 設(shè)計(jì)及 流程圖 ............................................................................................................12 清零設(shè)置 .........................................................................................................................12 等待設(shè)置 .........................................................................................................................12 起步價(jià)設(shè)置 .....................................................................................................................12 單價(jià)設(shè)置 .........................................................................................................................12 白天黑夜計(jì)費(fèi)方式轉(zhuǎn)換設(shè)置 .........................................................................................13 路程計(jì)算 .........................................................................................................................13 主程序設(shè)計(jì) .....................................................................................................................17 5 系統(tǒng)調(diào)試 與仿真 ...................................................................................................................17 軟件調(diào)試 ............................................................................................................................18 程序調(diào)試工具 —Keil......................................................................................................18 單片機(jī)仿真軟件在線調(diào)試 —Proteus.............................................................................18 系統(tǒng) 調(diào)試 ............................................................................................................................18 測 試結(jié)果 ............................................................................................................................18 II 6 結(jié) 論 .......................................................................................................................................22 參考文獻(xiàn) .....................................................................................................................................23 附錄 .............................................................................................................................24 附錄 A 電路原理圖 .................................................................................................................24 附錄 B 主要 程序 .....................................................................................................................25 致謝 ............................................................................................................................. 30 華南農(nóng)業(yè) 大學(xué)本科 畢業(yè)設(shè)計(jì)成績評定表 1 1 引言 我國人民的生活水平越來越好，人們在享受衣食住行的同時(shí)，人們越來越關(guān)注出行的舒適度。但是由于出租車的計(jì)費(fèi)存在著一些紛爭，讓乘客與車主都比較困擾。解決乘客與車主的矛盾，提高乘客的滿意度。而部分小城市尚未普及，但隨著城市建設(shè)日益加快，象征著城市面貌的出租車行業(yè)也將加速 發(fā)展，計(jì)費(fèi)器的普及也是毫無疑問的，所以未來汽車計(jì)費(fèi)器的市場還是十分有潛力的。當(dāng)出租車到達(dá)某地但需要在那里等候時(shí)，司機(jī)只要按一下 “等待 ”按鍵，這時(shí)顯示的價(jià)格會保持不變。到達(dá)目的地，便可顯示的數(shù)字收費(fèi)。它關(guān)系著交易雙方的利益。因此，汽車計(jì)費(fèi)器的研究也是十分有一個(gè)應(yīng)用價(jià)值的。為此我們采用了單片機(jī)進(jìn)行設(shè)計(jì)，相對來說功能強(qiáng)大，用較少的硬件和適當(dāng)?shù)能浖嗷ヅ浜峡梢院苋菀椎膶?shí)現(xiàn)設(shè)計(jì)要求，且靈活性強(qiáng)，可以通過軟件編程來完成更多的附加功能。 2 系統(tǒng)設(shè)計(jì)方案 選擇 2 控制 模塊 選擇 方案一： 采用 STC89C52