課程設(shè)計(jì)-基于單片機(jī)的數(shù)字溫度計(jì)課程設(shè)計(jì)-wenkub.com
2025-05-31 16:30 本頁面
【正文】 ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說，是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候，自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。s 21 win. Michel Platini, president of European football39。s antiracism taskforce, is in London for the Football Association39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。 tt=t*。 //讀低 8 位 b=ReadOneChar()。 //啟動(dòng)溫度轉(zhuǎn)換 Init_DS18B20()。 float tt=0。 dat=1。 DQ = datamp。 } /*****寫一個(gè)字節(jié) *****/ void WriteOneChar(unsigned char dat) { unsigned char i=0。 DQ = 1。 for (i=8。 x = DQ。 //稍做延時(shí) DQ = 0。} } } } /*****END*****/ : include define DQ P3_6 //定義 DS18B20 總線 I/O /*****延時(shí)子程序 *****/ void Delay_DS18B20(int num) { while(num) 。 //開啟外部中斷 0 EX1=1。x=0。 //報(bào)警檢測(cè) } else if(set_st==1) { BEEP=1。 //關(guān)閉外部中斷 0 EX1=0。x=0。z++) { Disp_init()。 check_wendu()。 //全局中斷開關(guān) TR0=1。 else BEEP=1。amp。 P1=0xff。 if(set_st==1)P2=0x89。 Delay(200)。 //顯示 C P1=0xf7。 //顯示百位 P1=0xfe。 //顯示小數(shù)點(diǎn) DIAN=0。 P2=LEDData[n]。 P1=0xff。 Delay(200)。 P1=0xfd。} //設(shè)置溫度顯示上限 } /*****顯示開機(jī)初始化等待畫面 *****/ Disp_init() { P2=0xbf。 //計(jì)算得到小數(shù)位 if(m0){m=0。 //獲取溫度值并減去 DS18B20 的溫漂誤差 a=c/100。set_st==2) { xiaxian++。set_st==1) { shangxian++。 if(xiaxian0)xiaxian=0。 if(shangxianxiaxian)shangxian=xiaxian。 } /*****外部中斷 0 服務(wù)程序 *****/ void int0(void) interrupt 0 { EX0=0。 TL0=0x00。 //下限報(bào)警溫度，默認(rèn)值為 5 uchar code LEDData[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}。 //溫度值全局變量 uchar n。 //閃爍間隔標(biāo)志 bit beep_st。 最后是單片機(jī)實(shí)踐操作，由于我自己已買了一塊開發(fā)板，所以硬件調(diào)試比較順利，效果也不錯(cuò)，就是 DS18B20 溫度傳感器 靈敏度不太高，示數(shù)變化不大。 其中 DS18B20 實(shí)物圖為 更新顯示緩沖區(qū) 在室溫下， LED 顯示器 示數(shù)如圖 ，為 攝氏度 圖 用手蓋住 溫度 傳感器后 ， LED 顯示器 示數(shù)如圖 ，為 攝氏度。 在軟件中選定傳感器后可對(duì)其進(jìn)行環(huán)境溫度設(shè)置，如圖 ，將環(huán)境溫度設(shè)為 。 系統(tǒng)的 主程序 主要用來初始化一些系統(tǒng)參數(shù)，對(duì) DS18B20 的配置數(shù)據(jù)進(jìn)行一系列的設(shè)定。蜂鳴器通過 Q1 放大后與引腳 相連。 溫度 /℃ 二進(jìn)制表示 十六進(jìn)制表示 +125 0000 0111 1101 0000 07D0H +85 0000 0101 0101
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