【正文】 } 鍵盤程序 void key_change() { static char key_num,bai=5,shi,ge。 bai_ok=0。 switch(key_num) { case 2: //設(shè)定溫度的個位 { shi++。 } } else { key_num = keyscan()。 inttostrr(setPoint,buffer)。s 21 win. Michel Platini, president of European football39。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. 一個人的時候，自己的想法總是特別地清晰。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。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。s antiracism taskforce, is in London for the Football Association39。break。 } case 6:shi_ok=1。break。 goback_to_PID=0。 TL0=0xB0。當(dāng) P2^0為低電平是光隔右側(cè)的 6引腳導(dǎo)通，進(jìn)而控制晶閘管導(dǎo)通。 將上述兩種方案比較，方案一中固態(tài)繼電器雖然性能優(yōu)于方案二中的雙向晶 閘管 ， 但考慮固態(tài)繼電器成本遠(yuǎn)高于雙向晶閘管，故采用方案二。 STC89C52單片機(jī)片內(nèi)有 8KB的 EPROM和 256B的 RAM，程序通過串口下載，十分方便 。 關(guān)鍵詞： 傳感器 DS18B20，單片機(jī) STC89C52， PID算法 ， 液晶 LM1602， 雙向晶閘管 BTA06 1 選題背景 在現(xiàn)代工業(yè)生產(chǎn)和日常生活當(dāng)中，對溫度的檢測、實(shí)現(xiàn)自動恒溫控制有著非常重要實(shí)際意義和廣泛的應(yīng)用，例如大型火力發(fā)電站鍋爐的溫度控制、石油煉油廠油溫的控制等。 DS18B20為數(shù)字式溫度傳感器，直接將溫度信號轉(zhuǎn)換為數(shù)字量， 可編程的分辨率為 9～ 12位 ,采用 獨(dú)特的 單總線 接口，只需要一條 總 線 就可以實(shí)現(xiàn)與單片機(jī)通信 ，簡化了硬件電路設(shè)計，降低了設(shè)計成本。 將上述兩種方案比較，方案一 中 LED數(shù)碼管雖然價格便宜， 但需設(shè)計驅(qū)動電路，而且 本設(shè)計需要顯示較多系統(tǒng)運(yùn)行參數(shù)，故又增加編碼復(fù)雜度，同 時對單片機(jī)性能要求提高，性價比低，方案二 LM1602液晶顯示有電路設(shè)計簡單， 編碼復(fù)雜度低的優(yōu)點(diǎn)，故采用方案二。能夠?qū)崿F(xiàn)在 0℃ — ℃設(shè)定任一溫度保持恒定。 // 偏差 if(Error 100) { open_duty = 60。 setPosition(1,0)。shi_ok=1。break。break。 break。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。 At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt。 From the corner at the beginning of deep friendship。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。 } } g an employment tribunal claim Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。break。break。//左移循環(huán)調(diào)節(jié)溫度的個位 case 5: //溫度的十位減一 { bai。 setPosition(2,0)。 // 積分 dError = Error LastE