基于單片機(jī)的出租車自動(dòng)計(jì)費(fèi)設(shè)計(jì)(存儲(chǔ)版)
【正文】 之間用于公平貿(mào)易結(jié)算的工具，因而計(jì)價(jià)器計(jì)價(jià)準(zhǔn)確與否，直接關(guān)系到經(jīng)營(yíng)者和消費(fèi)者的經(jīng)濟(jì)利益。其中復(fù)位電路是單片機(jī)的初始化操作,除了正常的初始化外,為擺脫死機(jī)等困境,設(shè)計(jì)復(fù)位電路可以重新開始。具有良好性能的計(jì)價(jià)器無(wú)論是對(duì)廣大出租車司機(jī)朋友還是乘客來(lái)說(shuō)都是很必要的。在微機(jī)的大家族中。不但控制簡(jiǎn)單，而且成本低廉，設(shè)計(jì)電路簡(jiǎn)單。其將通用的微處理器和Flash存儲(chǔ)器結(jié)合在一起，特別是可反復(fù)擦寫的 Flash存儲(chǔ)器可有效地降低開發(fā)成本。P1口管腳寫入1后，被內(nèi)部上拉為高，可用作輸入，P1口被外部下拉為低電平時(shí)，將輸出電流，這是由于內(nèi)部上拉的緣故。 （6）P3口：P3口管腳是8個(gè)帶內(nèi)部上拉電阻的雙向I/O口，可接收輸出4個(gè)TTL門電流。在平時(shí)，ALE端以不變的頻率周期輸出正脈沖信號(hào)，此頻率為振蕩器頻率的1/6。在由外部程序存儲(chǔ)器取指期間，每個(gè)機(jī)器周期兩次/PSEN有效。該反向放大器可以配置為片內(nèi)振蕩器。靜態(tài)驅(qū)動(dòng)是指每個(gè)數(shù)碼管的每一個(gè)段碼都由一個(gè)單片機(jī)的I/O埠進(jìn)行驅(qū)動(dòng)，或者使用如BCD碼二十進(jìn)位解碼器解碼進(jìn)行驅(qū)動(dòng)。通過(guò)這兩個(gè)引腳在芯片外并接石英晶體振蕩器和兩只電容（電容和一般取33pF）。 （六） 按鈕接口電路采用獨(dú)立式鍵盤：獨(dú)立式鍵盤中，每個(gè)按鍵占用一根I/O口線，每個(gè)按鍵電路相對(duì)獨(dú)立。 ③ 目前支持的單片機(jī)類型有：68000系列、8051系列、AVR系列、PIC12系列、PIC16系列、PIC18系列、Z80系列、HC11系列以及各種外圍芯片。（三）利用proteus與keil進(jìn)行調(diào)試使用步驟:，建立工程，輸入程序。一個(gè)月來(lái)，經(jīng)過(guò)自己和同伴的努力，基本上完成了設(shè)計(jì)要求的內(nèi)容，在系統(tǒng)可行性分析、原理圖設(shè)計(jì)等方面都作了許多實(shí)際工作，取得了一些成績(jī)，同時(shí)也遇到了一些問(wèn)題，存在一些不足。這在以前的學(xué)習(xí)過(guò)程中是不曾學(xué)到的。 you don39。Further help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as aEmployment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s 21 win.Michel Platini, president of European football39。The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候，自己的想法總是特別地清晰。 Have declared the end of the encounter that haven39。t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).cause there。 Those were broken into various shapes of stationery。Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來(lái)，這個(gè)世界上，對(duì)某個(gè)事件能產(chǎn)生化學(xué)反應(yīng)的，除了非做不可的堅(jiān)決，還有，時(shí)間?？傆X(jué)得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。for the racist behaviour of their fans duringTo find your nearest CAB, including those that give advice by , click onagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i.If you are worried about how the time limits apply to you, take advice from one of the organisations listed undermcs51系列單片機(jī)系統(tǒng)原理與設(shè)計(jì)。經(jīng)過(guò)單元機(jī)設(shè)計(jì)和系統(tǒng)設(shè)計(jì)鞏固了以前所學(xué)的專業(yè)知識(shí)，自己真正認(rèn)識(shí)到理論聯(lián)系實(shí)際的重要性，為以后的學(xué)習(xí)和工作提供了很多有價(jià)值的經(jīng)驗(yàn)。軟件方面，同硬件也是一個(gè)道理，先綜合考慮主要程序要實(shí)現(xiàn)什么，然后主程序的運(yùn)行思路為基礎(chǔ)，逐個(gè)完成各個(gè)功能的子程序，由主程序?qū)⑦@些子程序系統(tǒng)地統(tǒng)一在一起，使其運(yùn)行更為合理流暢。（二） keil軟件介紹Keil軟件是目前最流行開發(fā)MCS51系列單片機(jī)的軟件，這從近年來(lái)各仿真機(jī)廠商紛紛宣布全面支持Keil即可看出。 該軟件的特點(diǎn)： ① 全部滿足我們提出的單片機(jī)軟件仿真系統(tǒng)的標(biāo)準(zhǔn)，并在同類產(chǎn)品中具有明顯的優(yōu)勢(shì)。上電瞬間RESET引腳獲得高電平，隨著電容的充電，RERST引腳的高電平將逐漸下降。 而本次設(shè)計(jì)我采用四位七段數(shù)碼顯示管四位七段數(shù)碼管內(nèi)部的四個(gè)數(shù)碼管共用a~dp這8根數(shù)據(jù)線，為人們的使用提供了方便，因?yàn)槔锩嬗兴膫€(gè)數(shù)碼管，所以它有四個(gè)公共端，加上a~dp，共有12個(gè)引腳。LED數(shù)碼管要正常顯示，就要用驅(qū)動(dòng)電路來(lái)驅(qū)動(dòng)數(shù)碼管的各個(gè)段碼，從而顯示出我們要的數(shù)位，因此根據(jù)LED數(shù)碼管的驅(qū)動(dòng)方式的不同，可以分為靜態(tài)式和動(dòng)態(tài)式兩類。 （11）XTAL2：來(lái)自反向振蕩器的輸出。如果微處理器在外部執(zhí)行狀態(tài)ALE禁止，置位無(wú)效。 ALE/PROG：當(dāng)訪問(wèn)外部存儲(chǔ)器時(shí)，地址鎖存允許的輸出電平用于鎖存地址的地位字節(jié)。在給出地址“1”時(shí)，它利用內(nèi)部上拉優(yōu)勢(shì)，當(dāng)對(duì)外部八位地址數(shù)據(jù)存儲(chǔ)器進(jìn)行讀寫時(shí)，P2口輸出其特殊功能寄存器的內(nèi)容。在FIASH編程時(shí)，P
公司管理相關(guān)推薦
鄂ICP備17016276號(hào)-1