基于mcs-51系列單片機(jī)的數(shù)字溫度計(jì)設(shè)計(jì)-預(yù)覽頁(yè)
【正文】 殊功能寄存器(SFR)區(qū)中R2寄存器內(nèi)容，整個(gè)訪問(wèn)期間不改變。圖35 DS18B20和單片機(jī)的接口連接 復(fù)位信號(hào)及外部復(fù)位電路，即單片機(jī)每執(zhí)行一次程序就設(shè)置一次喂狗信號(hào)，清零看門(mén)狗器件。圖36 復(fù)位電路 單片機(jī)與報(bào)警電路系統(tǒng)中的報(bào)警電路是由發(fā)光二極管和限流電阻組成。這里采用靜態(tài)顯示，系統(tǒng)通過(guò)單片機(jī)的串行口來(lái)實(shí)現(xiàn)靜態(tài)顯示。圖37為顯示電路的連接圖。DSl8B20的供電方式靈活，利用外接電源還可增加系統(tǒng)的穩(wěn)定性和可靠性。小數(shù)部分進(jìn)行四舍五入處理：℃的話，向個(gè)位進(jìn)1；℃的時(shí)候，舍去不要。開(kāi)始提取整數(shù)部分存入HT提取小數(shù)部分存入LTLT右移三位,HT++將小數(shù)部分整數(shù)化提取符號(hào)部分存入signLT是否大于5是否為負(fù)數(shù)RET負(fù)數(shù)標(biāo)志flag=1YNNY圖45 溫度數(shù)據(jù)處理流程圖 1602顯示部分1602的讀寫(xiě)時(shí)序圖如下：圖46 1602液晶的讀時(shí)序圖圖47 1602的寫(xiě)時(shí)序圖根據(jù)以上時(shí)序圖可以得出讀寫(xiě)程序流程圖如下：開(kāi)始選擇寫(xiě)數(shù)據(jù)寫(xiě)命令RS=1||RS=0選擇寫(xiě)操作RW=1使能EN準(zhǔn)備好寫(xiě)入的數(shù)據(jù)DB0~DB7禁止EN結(jié)束開(kāi)始選擇寫(xiě)數(shù)據(jù)寫(xiě)命令RS=1||RS=0選擇讀操作RW=0使能EN禁止EN結(jié)束圖48 1602的寫(xiě)流程圖圖48 1602的讀流程圖5 數(shù)據(jù)測(cè)試用手觸屏溫度傳感器，可以發(fā)現(xiàn)溫度大概顯示為32度左右。參考文獻(xiàn)【1】作著：姜濤【2】書(shū)名：基于單片機(jī)的數(shù)字式溫度計(jì)設(shè)計(jì)【3】出版社：西北電力學(xué)?！?】出版年月：【5】頁(yè)碼：27頁(yè)g an employment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if:Dismissal.You can make a claim to an employment tribunal, even if you haven39。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 organisations listed underif you win the case.If you are thinking about signing up for nearest CAB.For more information about making a claim to an employment tribunal, sees 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。City39。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。二十年的人生軌跡深深淺淺，突然就感覺(jué)到有些事情，非做不可了。 Then in high school, think don39。A person39。嫌惡過(guò)自己的怯懦，最終卻發(fā)現(xiàn)有很多緣分，有很多錯(cuò)過(guò)，好像冥冥之中真的已經(jīng)注定。 From the corner at the beginning of deep friendship。Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The supersonic descent could happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he3
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