【正文】 made a lot of improvements make the chip with raditional 51 SCM features not available. In a single chip, with 8 CPU dexterous and insystem programmable Flash, the STC89C52 offers solutions for high flexibility, super efficient for many embedded control applications. Has the standard features: 8K bytes of Flash, 512 bytes of RAM, 32 I/O lines, the watchdog timer, builtin 4KB EEPROM, MAX810 reset circuit, 3 16 timer / counter, 4 external interrupts, a 7 vector level 4 interrupt structure, a total of. In addition STC89C52 can be reduced to 0Hz static logic operation, support 2 software selectable power saving mode. The idle mode, the CPU stops working, RAM, timer / counter, serial port interrupt, continue to work owerdown mode, the RAM content being saved, has been frozen, disabling all other chip functions, until the next interrupt or hardware reset. Maximum operating requency of 35MHz, 6T/12T optional.SCM experiment platform based on STC89C52 MCU development of a soft, bined with hardware, software design in Keil C environment, including water lights, digital tube display and LCD display module, the simulation successfully in Protues, download to the circuit board test successful. To achieve water lamp jump display flow, using interrupt 60 digital tube counting and LCD display different characters within the function.KEYWORDS: STC microcontroller, prehensive experimental board, software and hardware bined with, and the program development design目 錄摘 要 I目 錄 III前 言 1第1章 系統(tǒng)概述 2 設計題目 2 系統(tǒng)設計目的和內容 2 設計目的 2 設計內容 2 設計要求 3 設計步驟 3第2章 整體設計方案 4 開發(fā)板整體外觀 4 整板電路PROTUES仿真電路 4 軟件功能描述 5 仿真軟件PROTUES中的效果圖 7第3章 硬件電路設計 9 9 數(shù)碼管概述 9 數(shù)碼管內部結構 9 兩位一體共陰數(shù)碼管和74LS374鎖存器接口電路 11 LCD1602液晶 12 LCD1602液晶簡介 12 LCD1602液晶引腳介紹 12 LCD1602液晶外圍接口電路 14 串口通信 14 串口通訊概述 14 MAX232接口電路 15第4章 軟件設計 16 16 17第5章 調試及故障分析 21 焊接準備階段元器件測試、電路原理圖故障分析 21 電路焊接過程中的故障分析 21 程序編寫過程中的故障分析 21 實物演示效果 22結論 24謝辭 25參考文獻 26附　錄 27IV前 言隨著電子技術的發(fā)展，單片機在電訊技術、工業(yè)控制、汽車自動化、家用電器等領域得到了廣泛的應用，而單片機由于其實用性好、可靠性高、便于擴展等特點得到了廣泛的應用。在單芯片上，擁有靈巧的8 位CPU 和在系統(tǒng)可編程Flash，使得STC89C52為眾多嵌入式控制應用系統(tǒng)提供高靈活、超有效的解決方案?？臻e模式下，CPU 停止工作，允許RAM、定時器/計數(shù)器、串口、中斷繼續(xù)工作。市場上現(xiàn)存的單片機開發(fā)板很多，因此，要求設計盡量能夠達到資源豐富、易用性好、設計美觀等特點。 設計內容178。 獨立完成電路板的焊接，掌握故障排除方法，完成實驗平臺的硬件設計及開發(fā)；178。 將程序加載在仿真圖上運行，截取需要的電路圖178。 * 仿真芯片的31腳（/EA）已接至高電平，所以仿真時只能使用片內ROM，不能使用片外ROM；但仿真器外引插針中的31腳并不與仿真芯片的31腳相連，故該仿真器仍可插入到擴展有外部ROM（其CPU的/EA引腳接至低電平）的目標系統(tǒng)中使用。178。 具有強大的原理圖繪制功能在PROTUES繪制好原理圖后，調入已編譯好的目標代碼文件：*.HEX，可以在PROTUES的原理圖中看到模擬的實物運行狀態(tài)和過程?？蓪崿F(xiàn)Keil C 與 Protues連接調試。當陽極為高電平時發(fā)光二級管發(fā)光。led數(shù)碼管廣泛用于儀表，時鐘，車站，家電等場合。習慣上是以“a”段對應段碼字節(jié)的最低位。 ，對比度可調178。如表33所示：表33 讀寫操作選擇RSR\W寄存器及操作00指令寄存器寫入01忙信號和地址計數(shù)器讀出10數(shù)據(jù)寄存器寫入11數(shù)據(jù)寄存器讀出第6腳：E(或EN)端為使能(enable)端,高電平（1）時讀取信息，負跳變時執(zhí)行指令。串行通信按信息的格式可分為異步通信和同步通信兩種方式；根據(jù)信息傳送的方向，串行通信可以分為單工、半雙工和全雙工3種，如圖36所示。sbit lcdrs=P1^6。uchar code table3[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}。j)。}void write_data(uchar date){ lcdrs=1。 write_(0x0c)。 P2=0x55。i++) { P2=table2[i]。 delay(5)。 A1=0。 E1=1。 TR0=1。 delay(500)。break。 芯片插槽接反，將導致整體電路不能執(zhí)行功能216。接下來的工作就是按照原理圖進行編程了，剛開始的時候，什么也不會寫，感覺無從下手。才能更好的融會貫通；最后，了解到實踐是檢驗真理的唯一標準，光靠理論是不行的，只有多實踐，才能好的理解，練習我們的動手能力，在以后的學習和生活中都是很有幫助的。二、設計要求1. 完成綜合實驗平臺的電路分析，進行模塊分解，掌握各部分電路的工作原理；2. 獨立完成電路板的焊接，掌握故障排除方法，完成實驗的硬件設計及開發(fā)；3. 結合Keil C軟件在焊接無誤的單片機實驗平臺上開發(fā)出流水燈、LCD顯示模塊，通信模塊等程序設計；4. 按照要求撰寫課程設計論文。against 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 underTo find your nearest CAB, including those that give advice by , click onfor the racist behaviour of their fans during總覺得自己自己似乎應該去做點什么，或者寫點什么。Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time.　　原來，這個世界上，對某個事件能產(chǎn)生化學反應的，除了非做不可的堅決，還有，時間。 Those were broken into various shapes of stationery。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 thereXXXII