【正文】 *//******************************************************************/unsigned char ReadOneChar(void){ uchar i=0。 //稍做延時后 如果x=0則初始化成功 x=1則初始化失敗 delay_18B20(20)。 //拉高總線 delay_18B20(14)。 //單片機(jī)將DQ拉低 delay_18B20(80)。 //DQ復(fù)位 delay_18B20(8)。}/******************************************************************//* ds18b20初始化函數(shù) *//******************************************************************/void Init_DS18B20(void) { unsigned char x=0。 beep=~beep。i50。i++) {} } }/******************************************************************//* 蜂鳴器發(fā)聲函數(shù) *//******************************************************************/void di(){ uchar i。 while(a) { for(i=0。 _nop_()。 _nop_()。i } } } }/******************************************************************//* 毫秒級延時函數(shù) *//******************************************************************/void delay(uchar a){ uchar i。 if(Display_Flag==0) { display()。 keyscan()。 //寫入時鐘值，如果使用備用電池時候，不需要沒每次上電寫入，此程序應(yīng)該屏蔽 while(1) { ReadTemp()。 Init_DS18B20()。void alarm()。void display()。void write_nyr(uchar add,uchar dat)。void ini_lcd1602()。void lcd_mang()。void delay1(uchar a)。 void Set_RTC(void)。uchar Read_Ds1302 ( uchar address )。 //溫度數(shù)據(jù)轉(zhuǎn)換成液晶字符顯示void Write_Ds1302_byte(uchar temp)。void ReadTemp(void)。unsigned char ReadOneChar(void)。//兩只蝴蝶unsigned char code Music_Two[] ={ 0x17,0x03, 0x16,0x03, 0x17,0x01, 0x16,0x03, 0x17,0x03, 0x16,0x03, 0x15,0x01, 0x10,0x03, 0x15,0x03, 0x16,0x02, 0x16,0x0D, 0x17,0x03, 0x16,0x03, 0x15,0x03, 0x10,0x03, 0x10,0x0E, 0x15,0x04, 0x0F,0x01, 0x17,0x03, 0x16,0x03, 0x17,0x01, 0x16,0x03, 0x17,0x03, 0x16,0x03, 0x15,0x01, 0x10,0x03, 0x15,0x03, 0x16,0x02, 0x16,0x0D, 0x17,0x03, 0x16,0x03, 0x15,0x03, 0x10,0x03, 0x15,0x03, 0x16,0x01, 0x17,0x03, 0x16,0x03, 0x17,0x01, 0x16,0x03, 0x17,0x03, 0x16,0x03, 0x15,0x01, 0x10,0x03, 0x15,0x03, 0x16,0x02, 0x16,0x0D, 0x17,0x03, 0x16,0x03, 0x15,0x03, 0x10,0x03, 0x10,0x0E, 0x15,0x04, 0x0F,0x01, 0x17,0x03, 0x19,0x03, 0x19,0x01, 0x19,0x03, 0x1A,0x03, 0x19,0x03, 0x17,0x01, 0x16,0x03, 0x16,0x03, 0x16,0x02, 0x16,0x0D, 0x17,0x03, 0x16,0x03, 0x15,0x03, 0x10,0x03, 0x10,0x0D, 0x15,0x00, 0x19,0x03, 0x19,0x03, 0x1A,0x03, 0x1F,0x03, 0x1B,0x03, 0x1B,0x03, 0x1A,0x03, 0x17,0x0D, 0x16,0x03, 0x16,0x03, 0x16,0x0D, 0x17,0x01, 0x17,0x03, 0x17,0x03, 0x19,0x03, 0x1A,0x02, 0x1A,0x02, 0x10,0x03, 0x17,0x0D, 0x16,0x03, 0x16,0x01, 0x17,0x03, 0x19,0x03, 0x19,0x03, 0x17,0x03, 0x19,0x02, 0x1F,0x02, 0x1B,0x03, 0x1A,0x03, 0x1A,0x0E, 0x1B,0x04, 0x17,0x02, 0x1A,0x03, 0x1A,0x03, 0x1A,0x0E, 0x1B,0x04, 0x1A,0x03, 0x19,0x03, 0x17,0x03, 0x16,0x03, 0x17,0x0D, 0x16,0x03, 0x17,0x03, 0x19,0x01, 0x19,0x03, 0x19,0x03, 0x1A,0x03, 0x1F,0x03, 0x1B,0x03, 0x1B,0x03, 0x1A,0x03, 0x17,0x0D, 0x16,0x03, 0x16,0x03, 0x16,0x03, 0x17,0x01, 0x17,0x03, 0x17,0x03, 0x19,0x03, 0x1A,0x02, 0x1A,0x02, 0x10,0x03, 0x17,0x0D, 0x16,0x03, 0x16,0x01, 0x17,0x03, 0x19,0x03, 0x19,0x03, 0x17,0x03, 0x19,0x03, 0x1F,0x02, 0x1B,0x03, 0x1A,0x03, 0x1A,0x0E, 0x1B,0x04, 0x17,0x02, 0x1A,0x03, 0x1A,0x03, 0x1A,0x0E, 0x1B,0x04, 0x17,0x16, 0x1A,0x03, 0x1A,0x03, 0x1A,0x0E, 0x1B,0x04, 0x1A,0x03, 0x19,0x03, 0x17,0x03, 0x16,0x03, 0x0F,0x02, 0x10,0x03, 0x15,0x00, 0x00,0x00 }。uchar code tab3[14]= Set Alarm! 。uchar code tab1[]=20 。uchar code table6[]=FRI。uchar code table4[]=WED。 //星期字表uchar code table2[]=MON。 //秒分時日月周年 最低位寫位uchar code read_rtc_address[7]={0x81,0x83,0x85,0x87,0x89,0x8b,0x8d}。char l_tmpdate[7]={0x50,0x08,0x011,0x07,0x10,0x01,0x12}。 //定義標(biāo)志位uchar miao,fen,shi,ri,yue,week,nian,T,C=0,k=0,m=0,n=0。 //蜂鳴器控制IO口sbit led1 = P2^0。 //鬧鈴開關(guān)鍵sbit DQ=P3^7。 //開設(shè)定鬧鈴鍵sbit key5=P1^4。 //調(diào)時加鍵sbit key3=P1^2。sbit key1=P1^0。sbit lcdrw=P2^5。 //數(shù)據(jù) sbit RST=P3^5。參 考 文 獻(xiàn)[1] ：高等教育出版社,2004[2] ：人民郵電出版社,2004[3] :電子工業(yè)出版社,2005 [4] ：哈爾濱工業(yè)大學(xué)出版社,2004 [5] :機(jī)械工業(yè)出版社,2005 [6] :華中科技大學(xué)出版社,2001 附 錄課程設(shè)計中的程序如下：include include include define uchar unsigned chardefine uint unsigned intsbit SCK=P3^6。生成HEX文件后可以在PROTEUS上進(jìn)行仿真調(diào)試。在不久的畢業(yè)設(shè)計論文中一定會完善該部分。圖37 DS18B20溫度采集（3）DS18B20工作時序圖38 復(fù)位時序圖圖39 讀時序圖圖310 寫時序圖4 系統(tǒng)調(diào)試硬件調(diào)試是測試焊接完成后的成品的硬件電路的功能，發(fā)現(xiàn)及排除相關(guān)故障，主要包括主控芯片的調(diào)試以及各模塊電路的調(diào)試。 （2）電路設(shè)計如下圖所示。（1）DS18B20的性能特點可歸納如下：1）獨特的單線接口僅需一個端口引腳進(jìn)行通信；2）DS18B20支持多點組網(wǎng)功能，多個DS18B20可以并聯(lián)在唯一的三線上，實現(xiàn)組網(wǎng)多點測溫；3）DS18B20在使用中不需要任何外圍元件，全部 傳感元件及轉(zhuǎn)換電路集成在形如一只三極管的集成電路內(nèi)；4）測溫范圍－55℃～＋125℃，在10～+85℃時精度為177。 DS1302與RAM相關(guān)的寄存器分為兩類：一類是單個RAM單元，共31個，每個單元組態(tài)為一個8位的字節(jié)，其命令控制字為C0H～FDH，其中奇數(shù)為讀操作，偶數(shù)為寫操作；另一類為突發(fā)方式下的RAM寄存器，此方式下可一