基于單片機的數(shù)字溫度計c程序(Microcontroller based digital thermometer C program)

1、基于單片機的數(shù)字溫度計c程序（MicrocontrollerbaseddigitalthermometerCprogram）#包括reg52?！?包括信息?！?定義unsignedchar函數(shù)#unsignedint定義單元#定義delaynop()_nop_()；_nop_()；_nop_()；_nop_()；公司DQP22；普通雙=P26；/定義鎖存器鎖存端普通焊接=P27；普通RS=P35；/定義1602液晶RS端公司lcden=P34；/定義1602液晶lcden端P3了S1=0；/定義按鍵-功能鍵公司S2=P31；/定義按鍵-增加鍵P3了S3=2；/定義按鍵-減小鍵P3了S4=6；/

2、鬧鐘查看鍵P3了RD=7；普通嗶=P23；/定義蜂鳴器端函數(shù)代碼temp_disp_title=“當(dāng)前溫度：“；函數(shù)current_temp_display_buffer=“臨時”；函數(shù)代碼alarm_temp=“報警溫度高低”；函數(shù)alarm_hi_lo_str=“嗨：Lo：“；函數(shù)temp_data2=0 x00,0 x00；函數(shù)temp_alarm2=0 x00,0 x00；函數(shù)顯示5=0 x00,0 x00,0 x00,0 x00,0 x00；函數(shù)顯示3=0 x00,0 x00,0 x00；函數(shù)代碼df_table=0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9；函數(shù)，

3、=0；/當(dāng)前讀取的溫度整數(shù)部分函數(shù)temp_value=0 x00,0 x00；/從DS18B20讀取的溫度值函數(shù)display_digit=0,0,0,0；/待顯示的各溫度數(shù)位點ds18b20_is_ok=1；/傳感器正常標(biāo)志/-延時/1/-無效的極限（個X）我的函數(shù)；當(dāng)（x）為（i0；i200；i+）；/-延時/2/-虛空Delay（個X）（x）；/-/忙檢查/-無效write_com（UCHARCOM）/液晶寫命令函數(shù)RS0；lcden=0；P0=COM；極限（5）；lcden=1；極限（5）；lcden=0；write_lcd_data（void函數(shù)日期）/液晶寫數(shù)據(jù)函數(shù)RS1；lcd

4、en=0；P0=日期；極限（5）；lcden=1；極限（5）；lcden=0；/-/設(shè)置液晶顯示位置/-無效set_disp_pos（ucharPos）write_com（POS|0 x80）；/-/液晶初始化/-無效initialize_lcd()函數(shù)數(shù)；RD=0；/軟件將矩陣按鍵第4列一端置低用以分解出獨立按鍵班杜拉=0；/關(guān)閉兩鎖存器鎖存端，防止操作液晶時數(shù)碼管會出亂碼維拉=0；lcden=0；write_com（0X38）；/初始化1602液晶write_com（0 x0c）；write_com（0 x06）；write_com（0 x01）；write_com（0 x80）；/設(shè)置顯

5、示初始坐標(biāo)對于（num=0；數(shù)14；數(shù)+）/顯示年月日星期write_lcd_data（temp_disp_title民）；極限（5）；/-/函數(shù)功能：初始化DS18B20/出口參數(shù)：現(xiàn)狀DS18B20是否復(fù)位成功的標(biāo)志/-init_ds18b20()函數(shù)函數(shù)的狀態(tài)；/儲存DS18B20是否存在的標(biāo)志，狀態(tài)=0，表示存在；狀態(tài)=1，表示不存在DQ1；Delay（8）；/6微秒略微延時約先將數(shù)據(jù)線拉高DQ0；Delay（90）；/再將數(shù)據(jù)線從高拉低，要求保持480960us600/略微延時約微秒以向DS18B20發(fā)出一持續(xù)480960us的低電平復(fù)位脈沖DQ1；Delay（8）；/釋放數(shù)據(jù)線（將

6、數(shù)據(jù)線拉高）/延時約30us（釋放總線后需等待1560us讓DS18B20輸出存在脈沖）狀態(tài)=DQ；Delay（100）；Todetectwhethertheoutputofthemicrocontroller/presencepulse(DQ=0saidtherewasenoughlongtimedelay)/,waitingfortheexistenceofoutputpulse.DQ=1;/datalinespulledReturnstatus;/returntestsuccess/-/function:readabyteExportparameters:dat-/readdata/-U

7、char,ReadOneByte()Uchar,I,dat=0;DQ=1;(_nop_);/thefirstdatalineup/waitforamachinecycleFor(i=0;i=1;(_nop_);/waitforamachinecycleDQ=1;/datalineartificialpullup,readyforthedetectionofDS18B20MCUoutputlevel_nop_(_nop_);();/delayofabout6us,sothatthehostsamplingin15USIf(DQdat|=0 x80);/ifthereaddatais1,willb

8、e1inDAT,ifthe0willremaintheoriginalvalueunchanged.Delay(30);/3usdelay,theremustbemorethan1USoftherecoveryperiodbetweentworeadtimingDQ=1;/datalinespulled,readyforthenextdatareadReturndat;/-/function:writeabyteEntranceparameters:dat-/datatobewritten/-VoidWriteOneByte(ucharDAT)Uchari;For(i=0;i=1;/datin

9、the1bitbinarydata./-/function:readthetemperaturevalueEntranceparameters:/-Void,Read_Temperature()If(Init_DS18B20)(/DS18B20=1)faultDS18B20_IS_OK=0;ElseWriteOneByte(0 xCC);/readserialnumbercolumnnumberoperationskipWriteOneByte(0 x44);/converttemperature(Init_DS18B20);/initializeDS18B20WriteOneByte(0 x

10、CC);/readserialnumbercolumnnumberoperationskipWriteOneByte(0 xBE);/readthetemperatureregister,thefirsttwoarelowandhightemperatureTemp_Value0=ReadOneByte(8);/lowtemperatureTemp_Value1=ReadOneByte(hightemperature);/8DS18B20_IS_OK=1;/-/function:displaythecurrenttemperatureinLCD/entranceparameters:/-Voi

11、d,Display_Temperature()Uchari;/delayvalueandnegativeidentificationUchar,t=150,ng=0;5all1/high(0 xF8)isnegative,negativecounterplus1,andsetthenegativesignIf(Temp_Value1&0 xF8)=0 xF8)Temp_Value1=Temp_Value1;Temp_Value0=Temp_Value0+1;If(Temp_Value0=0 x00Temp_Value1+);/plus1ifthelowbyteis00bitsthatcarry

12、,thenaddedtothehighbyteNg=1;/the1negativesignDisplay_Digit0=df_TableTemp_Value0&0 x0F;/findthedecimalparttemperature/getthetemperature(highbyteintegerpartofthelower3andthelowbyteinthehigh4bitunsigned)CurrentT=(Temp_Value0&0 xF0)(4)|(Temp_Value1&0 x07)4);/integerpartisdecomposedinto3bitdigitaltodispl

13、ayDisplay_Digit3=CurrentT/100;/100digitCurrentT/100;Display_Digit2=CurrentT%100/10;/tenDisplay_Digit1=CurrentT%10;/A/LCDdisplayrefreshbufferCurrent_Temp_Display_Buffer11=Display_Digit0+0;/thefirst0willbeconvertedintotheinteger48,thenaddthedigitalfront,GetstheASCIIcharacterofthecorrespondingnumberCur

14、rent_Temp_Display_Buffer10=.;Current_Temp_Display_Buffer9=Display_Digit1+0;/ACurrent_Temp_Display_Buffer8=Display_Digit2+0;/tenCurrent_Temp_Display_Buffer7=Display_Digit3+0;/100Nottodisplay0/highIf(Display_Digit3=0)Current_Temp_Display_Buffer7=;Forthe0timeandhigh/high0times,donotshowhighIf(Display_D

15、igit2=0andDisplay_Digit3=0)Current_Temp_Display_Buffer8=;/negativesymbolsaredisplayedintherightpositionIf(NG)If(Current_Temp_Display_Buffer8=)Current_Temp_Display_Buffer8=-;Elseif(Current_Temp_Display_Buffer7=)Current_Temp_Display_Buffer7=-;ElseCurrent_Temp_Display_Buffer6=-;/inthefirstrowshowtitleSet_Disp_Pos(0 x00);For(i=0;i16;i+)Write_LCD_Data(Temp_Disp_Titlei);Set_Disp_Pos(0 x40);/inthesecondlineshowsthecurrenttemperatureFor(i=0;i16;i+)Write_LCD_Data(Current_Temp_Display_Bufferi);/temperaturedisplaysymbols/Set_Disp_Pos(0 x4D);Write_LCD_Data(0 x00);Set_Disp_Pos(0 x4D);Write_LCD