【正文】 A person39。t remember his appearance. 基于單片機(jī)的超聲波測距系統(tǒng)的設(shè)計(jì) 37 童年時(shí)，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(shí)，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(shí)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(gè)句點(diǎn)，但畢業(yè)晚會的時(shí)候最終還是被梗塞在了咽喉，后來再次站在他曾經(jīng)揮汗如雨的球場，看著他投過籃球的球框時(shí)，突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。 Then in high school, think don39。 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。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。或許是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個(gè)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。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。s governing body, has also ordered an immediate investigation into the referee39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。s 150th anniversary celebrations and will attend City39。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. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. 基于單片機(jī)的超聲波測距系統(tǒng)的設(shè)計(jì) 36 The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。t appealed 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 anisations listed under Further 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 anisations listed under 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 a damagesbased agreement. In England and Wales, your solicitor can39。 //計(jì)算距離 } } } } g an employment tribunal clai Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。 //使外部中斷為 0 等下一次中斷 delay1(5)。 if(recflag==1) // 再一次判斷是否有接收波到來 { TR0=0。 _nop_()。 while(!recflag)。 // 開定時(shí)器 0 中斷進(jìn)行計(jì)數(shù) EX0=1。 // 開總中斷 基于單片機(jī)的超聲波測距系統(tǒng)的設(shè)計(jì) 35 ET0=1。 TX!=TX。i8。 EX0=0。 EA=0。 //定時(shí)器初始化 TH0=0。 while(1) { SPEAK=1。 TH0=0。 flag=1。 } /**********************單片機(jī)定時(shí)器 0******************************/ void zd0() interrupt 1 { TH0=0。 EX0=0。 } /**********************單片機(jī)外部中斷 *****************************/ void int0() interrupt 0 { EA=0。0xf0)4。 b=4。 a=read_byte()。 write_byte(0xcc)。 delay(300)。 write_byte(0xcc)。 } /**********************ds18b20 讀取溫度函數(shù) ************************/ uchar readtemptaure(void) { uchar a,b。 delay(4)。 DQ=1。i++) { DQ=0。 for(i=0。 delay(4)。 DQ=1。0x01。i++) { DQ=0。 for(i=0。 delay(4)。 delay(8)。 delay(80)。 delay(8)。 } /**********************ds18b20 初始化函數(shù) **************************/ void init_ds18b20() { uchar n。 disbuff[2]=S%1000%10 %10。 //顯示 “” } else { disbuff[0]=S%1000/100。 //顯示 “” disbuff[1]=10。 flag=0。 if((S=200)||flag==1) { SPEAK=0。 c=c/150。 delay1(10)。 TL0=0。 } /**********************距離計(jì)算函數(shù) *******************************/ void Conut(void) { time=TH0*256+TL0。 if(++posit=3) posit=0。} else {P1=discode[disbuff[posit]]。 } /*****************************顯示函數(shù) ****************************/ void Display(void) //掃描數(shù)碼管 { if(posit==0) 基于單片機(jī)的超聲波測距系統(tǒng)的設(shè)計(jì) 32 {P1=(discode[disbuff[posit]])amp。k0。j0。 } void delay1(uchar x) { uchar j,k。 void delay1(uchar x)。 uchar readtemptaure(void)。 uchar read_byte(void)。 void init_ds18b20(void)。 unsigned char const positon[3]={ 0xfe,0xfd,0xfb}。 bit recflag =0。 unsigned long S=0。 unsigned int time=0。通過李老師的督促和指導(dǎo)我才能得以順利的完成畢業(yè)設(shè)計(jì)，在此表示衷心的感謝！ 基于單片機(jī)的超聲波測距系統(tǒng)的設(shè)計(jì) 30 附錄Ⅰ 系統(tǒng)電路圖 基于單片機(jī)的超聲波測距系統(tǒng)的設(shè)計(jì) 31 附錄Ⅱ 系統(tǒng)部分源程序 /******************************初始化程序 *************************/ include //器件配置文件 include define TX P3_7 define DQ P3_6 define SPEAK P3_5 define uchar unsigned char define uint unsigned int uint i,c 。他嚴(yán)肅的科學(xué)態(tài)度，嚴(yán)謹(jǐn)?shù)闹螌W(xué)精神，精益求精的工作作風(fēng)，深深地感染和激勵著我。 2022． [10] 小翠、王金風(fēng)．單片機(jī)實(shí)用系統(tǒng)設(shè)計(jì)技術(shù) [M]．北京：國防工業(yè)出版社， 2022． [11] 春光．微型計(jì)算機(jī)控制技術(shù) [M]．北京：化學(xué)工業(yè)出版社， 2022． [12] 建海、路長厚、韓旭東．基于單片機(jī)的超聲波液位測量系統(tǒng) [J]．儀表技術(shù)與傳感器， 2022(1)： 39—40． [13] 閻 石 .數(shù)字電子技術(shù)基礎(chǔ) (第四版 )[M].北京：高等教育出版社， 1998. [14] 群芳等 .單片微型計(jì)算機(jī)與接口技術(shù)（第二版） [M].北京：電子工業(yè)出版社，20