【正文】 YANSHI JNB ，JIAN LJMP STARTJIANSU： MOV A，P2 ANL A，07H CJNE A，07H，JS LJMP STARTJS： MOV A，P2 INC A MOV P2，A LCALL XIANSHI LJMP START停止程序：TINGZHI： LCALL YANSHI JNB ，TING LJMP STARTTING： SETB LCALL PANTING LJMP START延時程序，這是一個子程序，功能是延時10ms：YANSHI： MOV A，0 Y： MOV R1，00H INC R1 CJNE R1，0FFH，Y INC A CJNE A，10，Y RET判停程序，這是一個子程序，若能從判停程序中返回，則說明電動機(jī)已停：PANTING： JNB ，YANSHI250ms AJMP PANTINGYANSHI250ms： CLR MOV P3，08H SETB MOV A，0Y250： MOV R1，00H INC R1 JB ，PANTING CJNE R1，0FFH，Y250 INC A CJNE A，250，Y250 RET顯示程序，這是一個子程序：XIANSHI： MOV A，P2 ANL A，07H MOV B，4 MUL AB ADD A，R3 MOV SCON，00H MOV R2，0 MOV DPTR，TAB MOV R3，AX： ADD A，R2 MOVC A，@A+DPTR MOV SBUF，A1： JNB TI，1 CLR TI INC R2 MOV A，R3 CJNE R3，4，X RETTAB： DB 03H，03H，49H，0DHDB 03H，03H，03H，0DHDB 03H，03H，49H，27HDB 03H，03H，03H，27HDB 03H，03H，49H，9HDB 03H，03H，03H，9DHDB 03H，03H，49H，0FFHDB 03H，0FFH，0FFH，0FFHEND65結(jié)　論通過本畢業(yè)設(shè)計可以看出用MCS51單片機(jī)控制直流無刷電動機(jī)是十分可靠的，設(shè)計中應(yīng)用到了較多的知識，采用了保護(hù)電路模塊，復(fù)位電路模塊等保護(hù)措施，應(yīng)用了許多較新的元器件，電路圖中有顯示模塊電路、復(fù)位模塊電路、按鍵模塊電路、驅(qū)動器端子輸入模塊電路、判停模塊電路、下載模塊電路等等電路設(shè)計，很好的實現(xiàn)了用單片機(jī)控制直流無刷電動機(jī)的正轉(zhuǎn)、反轉(zhuǎn)、加速、減速、急停等功能。謝 辭經(jīng)過一個多月的忙碌，畢業(yè)設(shè)計最終完美的落下了帷幕，從一開始的查找資料，詢問指導(dǎo)老師，到后來的循序漸進(jìn)，輕車熟路，這一切的一切都是伴隨著艱辛和汗水，在這次的畢業(yè)設(shè)計過程中我需要感謝的人太多了，沒有他們的幫忙，我的畢業(yè)設(shè)計不可能這么順利的完成。萬事開頭難，只要有一個明確的目標(biāo)，做起來就有了一個明確的方向，這個方向會一直指引我完成任務(wù)，就這樣，從一開始的整體規(guī)劃到后來的畫圖編輯，所有的問題都一一得到了解決，在此非常感謝那些在我們遇到困難時給與幫助的老師和同學(xué)，沒有你們的幫助我們不可能這么快的完成任務(wù)，當(dāng)然由于本人才疏學(xué)淺，其中錯誤肯定會有的，還希望老師予以指正！做畢業(yè)設(shè)計這項每個畢業(yè)生都必須自己獨立完成的一道“考題”考驗我們的不僅僅是如何把書本上的知識和現(xiàn)實聯(lián)系結(jié)合起來，更加考驗我們對待事情的態(tài)度，這并不是件簡單單的單純做畢業(yè)設(shè)計的事情，更是給我提供了一個鍛煉自己能力的機(jī)會，讓我明白了自己在哪些方面還是有不足的地方，給我以后的工作增添一定的基礎(chǔ)，這一點我想才是最重要的！在此，再次感謝那些給我提供幫助的老師和同學(xué)，沒你們的幫助我不可能這么順利的完成我該做的事情，謝謝！參考文獻(xiàn)[1] 杜志國，：[2] 馬家辰，孫玉德，：[3] 王秋爽，：[4] ：[5] ：[6] 張毅坤，陳善久，：[7] 王德彪. MCS51單片機(jī)原理及接口技術(shù). 北京：[8] 張毅剛，彭喜源，：[9] 李全力，蔡谷明，：[10] 樓然苗，：[11] 白駒絎，：[12] 薛鈞義，：[13] 趙光東，：[14] ，2002，（8）：46[15] ：[16] .附　錄 MCS51單片機(jī)指令表表中所用到的符號和含義如下：P 程序狀態(tài)寄存器PSW中的奇偶標(biāo)志位OV 程序狀態(tài)寄存器PSW中的溢出標(biāo)志位AC 程序狀態(tài)寄存器PSW中的輔助進(jìn)位標(biāo)志位CY 程序狀態(tài)寄存器PSW中的進(jìn)位標(biāo)志位Addrl11 11位地址Bit 位地址Rel 相對偏移量，為8位有符號數(shù)（補(bǔ)碼形式）Direct 直接地址指出單元內(nèi)容Data 立即數(shù)Rn 工作寄存器Rn（n=0～7）（Rn） 工作寄存器Rn的內(nèi)容A 累加器（A） 累加器內(nèi)容Ri i=0或1（Ri） R0或R1的內(nèi)容（（Rn）） 工作寄存器Rn的內(nèi)容X 某一個寄存器（X） 某一個寄存器內(nèi)容（（X）） 某一個寄存器支出的內(nèi)容單元→ 數(shù)據(jù)傳送方向⊕ 邏輯異或∧ 邏輯與∨ 邏輯或√ 對標(biāo)志產(chǎn)生影響 不影響標(biāo)志外文資料翻譯Along with the rapid development of semiconductor technology, microcontroller itself in the design with some new antijamming technique, make SCM reliability enhances unceasingly. Besides choosing strong antijamming capability of singlechip microcontroller systems and other auxiliary ponents reliability is also vital to suppress the interference, some of the ponents of the use of help improve the reliability of the system. In addition, the SCM system in the circuit design, printed circuit board design, wiring and manufacturing process, the system has no good ground installation, directly affect the reliability of the system.The microcontroller itself antijamming measuresFor improving the reliability of the microcontroller itself. In recent years, the manufacturer in singlechip microcontroller design adopted a series of measures to improve the reliability. These technologies are mainly embodied in the following respects.1 reduce external clock frequencyThe clock is the high frequency noise, except this application system can cause interference, but also possible to outside disturbance, make the electromagnetic patibility testing is not standard. High reliability of system in the application system, the selection of the low frequency noise of the single chip puter is reduced system of principles. For example, with 8051 microcontroller shortest instruction cycle when outside, 1 muon s clock is 12MHz. And also the SCM system clock speed of Motorola, more suitable for 4MHz only industrial system. In recent years, some production 8051 singlechip manufacturers are patible adopted some new technologies, without sacrificing speed on the premise of external clock needs to 1/3. Motorola and microputer in the launch of new 68HC08 series and its 16/32bit SCM widely adopted in the interior of zobah, external loop technique to 32KHz clock frequency, and internal bus speed is increased to 8MHz even higher.2. Low noise series microcontrollerThe traditional design of integrated circuit, the power, the derivation of the symmetrical arrangement of the usually at the sides. If left is to lower power, is. This makes the power supply noise through the wafer. Improved technology will power, arranged in two adjacent foot on the one hand, and reduced the current through the silicon, on the one hand, make external decoupling capacitor in PCB design more easily arrangement, in order to reduce noise. Another in integrated circuit design and reduce the noise is driving circuit design examples. Some microcontroller provides several large current output pin, from several to hundreds of ma ma. These highpower integrated into the driver circuit chip inside increases noise. The softening and hopping technique can eliminate the influence of this method is that a highpower tube into several small tube, the parallel for each pipe output string on different equivalent resistance of resistance. In order to reduce di/dt.3 the clock monitoring circuit, the watchdog technology and low voltage reductionMonitoring system clock, when the system clock stopped when the vibration signal generation system reset to restore system clock, is one of the measures to improve the system reliability. But the clock control effectively and save electricity is a pair of contradictory instruction STOP. Use only