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。寫論文是一個不斷學(xué)習(xí)的過程,我體會到實踐對于學(xué)習(xí)的重要性,以前只是明白理論,沒有經(jīng)過實踐考察,對知識的理解不夠明確,通過這次的做,真正做到理論實踐相結(jié)合。論文中可能會存在一些不足之處,敬請評審專家和各位老師批評指正。同時我也深刻的認(rèn)識到,在對待一個新事物時,一定要從整體考慮,完成一步之后再作下一步,這樣才能更加有效。Linux嵌入式系統(tǒng)教程[M].北京:北京航空航天大學(xué)出版社.2004[7]. 李建忠.單片機(jī)原理及應(yīng)用[M].西安:西安電子科技大學(xué).2002[8]. 韓志軍等.單片機(jī)應(yīng)用系統(tǒng)設(shè)計[M].機(jī)械工業(yè)出版社.2004[9]. 周潤景等.Proteus在MCS51amp。作為一個本科畢業(yè)生的畢業(yè)設(shè)計,由于自己缺乏經(jīng)驗,難免有許多地方考慮不周到,很多時候會走一些彎路,如果沒有老師的指導(dǎo),以及一些同學(xué)的幫助,想要完成這個畢業(yè)設(shè)計是不容易的。在此論文撰寫過程中,要特別感謝徐大誠老師對我的指導(dǎo)與督促,徐老師平日里工作繁多,但在我做畢業(yè)設(shè)計的每一個階段,都給予我耐心的指導(dǎo)和幫助。另外,還要感謝魏老師,在魏老師認(rèn)真的實驗指導(dǎo)下,我完成了畢業(yè)設(shè)計,他幫助我解決了很多從理論轉(zhuǎn)變?yōu)閷嵺`過程中的難題,同時還傳授了我不少人生的哲理。感謝我的班主任丁建強(qiáng)老師,謝謝他為我們?nèi)嗨龅囊磺?,他對我們的?fù)責(zé),耐心指導(dǎo)和幫助我們學(xué)習(xí)生活中遇到的難題,無私奉獻(xiàn)的精神很讓我感動,再次向他表示由衷的感謝。沒有各位老師的辛勤教育,便不會有我們今天的累累果實。此外,在這四年中結(jié)識的每位生活和學(xué)習(xí)上的朋友都是我人生的一筆財富。本文參考了大量的文獻(xiàn)資料,在此,向各學(xué)術(shù)界的前輩們致敬!附錄附錄1:實物照片說明附錄2:系統(tǒng)原理圖附錄3:部分源程序includeincludeincludeincludevoid main(void){ LCDInit()。 LCDDispString(0,2,freq: 0001000Hz)。 while(1) { key_scan()。 AD9834_SYNC=0。i16。0x8000) AD9834_DIN=1。 dat =1。 AD9834_SCLK = 1。}void AD9834(unsigned char Type,unsigned long Freq,unsigned int Phase){ unsigned int PhaseWord。 //2^28/75000000= unsigned int LSB = (FreqWord % 0x4000) + 0x4000。 //高14位 switch(Type) { case 0: WriteDat(0x2038)。 case 1: WriteDat(0x2002)。 case 2: WriteDat(0x2020)。 } WriteDat(LSB)。 //寫FREQ0 REG 的MSB PhaseWord = (unsigned int)(Phase % 360 * 2048 / + )。}includeunsigned char gFunctionCount=0。unsigned char gType=0。static void delay10ms(void){ unsigned char j,i。j110。i10。}void key_scan(void){ unsigned long freqtemp。 if(KEY1==0) { gFunctionCount++。 LCDDispChar(15,1,39。)。 LCDCursor()。 39。 LCDDispChar(15,2,39。)。 } else if(gFunctionCount==3) { gFunctionCount=0。 freqtemp=(unsignedlong)FreqNum[0]*1000000+(unsigned long)FreqNum[1]*100000+(unsignedlong)FreqNum[2]*10000+(unsigned long)FreqNum[3]*1000+(unsignedlong)FreqNum[4]*100+(unsigned long)FreqNum[5]*10+(unsigned long)FreqNum[6]。 AD9834(gType,freqtemp,0)。 } if(KEY2==0) { delay10ms()。 if(gFunctionCount==1 amp。 gTimeCount==1) { LCDDispString(6,1,Square )。 } else if(gFunctionCount==1 amp。 gTimeCount==2) { LCDDispString(6,1,Triangle)。 } else if(gFunctionCount==1 amp。 gTimeCount==3) { gTimeCount=0。gType=0。amp。 } else if(gFunctionCount==2 amp。 gTimeCount==2) { LCDDispNum(9,2,FreqNum[3])。amp。 } else if(gFunctionCount==2 amp。 gTimeCount==4) { LCDDispNum(7,2,FreqNum[1])。amp。 } else if(gFunctionCount==2 amp。 gTimeCount==6) { LCDDispChar(5,2,39。)。amp。LCDDispNum(11,2,FreqNum[5])。 } if(KEY3==0) { delay10ms()。amp。 if(FreqNum[5]==10) FreqNum[5]=0。LCDDispNum(10,2,FreqNum[4])。amp。 if(FreqNum[4]==10) FreqNum[4]=0。LCDDispNum(9,2,FreqNum[3])。amp。 if(FreqNum[3]==10) FreqNum[3]=0。LCDDispNum(8,2,FreqNum[2])。amp。 if(FreqNum[2]==10) FreqNum[2]=0。LCDDispNum(7,2,FreqNum[1])。amp。 if(FreqNum[1]==10) FreqNum[1]=0。 LCDDispNum(6,2,FreqNum[0])。amp。 if(FreqNum[0]==2) FreqNum[0]=0。 LCDDispChar(5,2,39。)。amp。 if(FreqNum[6]==10) FreqNum[6]=0。 LCDDispNum(11,2,FreqNum[5])。 } if(KEY4==0) { delay10ms()。amp。 if(FreqNum[5]==1) FreqNum[5]=9。LCDDispNum(10,2,FreqNum[4])。amp。 if(FreqNum[4]==1) FreqNum[4]=9。LCDDispNum(9,2,FreqNum[3])。amp。 if(FreqNum[3]==1) FreqNum[3]=9。LCDDispNum(8,2,FreqNum[2])。amp。 if(FreqNum[2]==1) FreqNum[2]=9。LCDDispNum(7,2,FreqNum[1])。amp。 if(FreqNum[1]==1) FreqNum[1]=9。 LCDDispNum(6,2,FreqNum[0])。amp。 if(FreqNum[0]==1) FreqNum[0]=1。 LCDDispChar(5,2,39。)。amp。 if(FreqNum[6]==1) FreqNum[6]=9。 LCDDispNum(11,2,FreqNum[5])。 }}includeincludeg an employment tribunal claiEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if:t agree with the disciplinary action your employer has taken against youDismissal.You can make a claim to an employment tribunal, even if you haven39。appealedFurther help.Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underdamagesbased agreement. In England and Wales, your solicitor can39。if you win the case.If you are thinking about signing up for re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. nearest CAB.For more information about making a claim to an employment tribunal, sees antiracism taskforce, is in London for the Football Association39。s Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me it39。opened disciplinary proceedings against CSKACity39。s governing body, has also ordered an immediate investigation into the referee39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。或許是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個不同的日子過成了同一天的樣子;或許是追溯過去,對自己那些近乎偏執(zhí)的怪異信念的醒悟,這些天以來,思緒一直很凌亂,在腦海中不斷糾纏。二十年的人生軌跡深深淺淺,突然就感覺到有些事情,非做不可了。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。 Then in high school, think don39。t remember his appearance. 童年時,覺得壓歲錢和新衣服是過年必備,但是隨著年齡的推進(jìn),會越來越發(fā)現(xiàn),那些東西根本就可有可無;初中時,以為要有一場暗戀才意味著真正的成長,但三年過去后,自己心平氣和的寫同學(xué)錄的時候,突然就發(fā)現(xiàn)是不是真正的成長了,好像并沒有那么重要了;然后到了高中,覺得非要吐露出自己的心聲才能為高中生涯里的懵懂情愫劃上一個句點,但畢業(yè)晚會的時候最終還是被