【正文】 Display_A_Char_8X16(V_Page_Offset,70+H_Offset,DIGITS+DateTime[6]/10*16)。TL0=(6553650000)%256。amp。amp。case 1: /*分鐘*/if(x==1amp。amp。DateTime[3]0) DateTime[3]。amp。/*刷新星期*/break。DateTime[4]1) DateTime[4]。amp。/*如果年份變化后當(dāng)前月份的天數(shù)大于上限則設(shè)為上限*/if(DateTime[3]MonthsDays[DateTime[4]])DateTime[3]=MonthsDays[DateTime[4]]。if(x==1amp。}SPK=0。for(i=0。i++) d+=MonthsDays[i]。w=(w+d)%7。}/*********刷新星期******/void RefreshWeekDay(){uint i,d,w=5。i++){DateTime[i]=Read_Data(0x81+2*i)。}Write_DS1302(0x8E,0x80)。Write_DS1302(0x8E,0x00)。Write_A_Byte_TO_DS1302(dat)。return dat。Write_A_Byte_TO_DS1302(addr)。}/*從DS1302指定位置讀數(shù)據(jù)*/uchar Read_Data(uchar addr)}uchar dat。b|=t7。for(i=0。 CLK=1。for(i=0。/*由參數(shù)t形成不同的頻率*/for(j=0。}}void Alarm(uchar t) /*溫度報(bào)警函數(shù)*/{uchar i,j。kSONG_TONE[i]/3。while(SONG_LONG[i]!=0||SONG_TONE[i]!=0){/*播放各個(gè)音符,SONG_LONG為拍*/for(j=0。while(x) for(i=0。/*半角數(shù)字點(diǎn)陣8乘16*/uchar code DIGITS[]={ 0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,/*0*/ 0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,/*1*/ 0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,/*2*/ 0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,/*3*/ 0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,/*4*/ 0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,/*5*/ 0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,/*6*/ 0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,/*7*/ 0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,/*8*/ 0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,/*9*/}。/*當(dāng)前調(diào)整的時(shí)間對(duì)象:秒,分,時(shí),日,月,星期,年(0,1,2,3,4,5,6)變量*//*其中星期由年月日調(diào)整自動(dòng)完成*/char Adjust_Index=1。/*待顯示的各溫度數(shù)位*/extern bit DS18B20_IS_OK=1。/*顯示年月日,星期,時(shí)分秒的固定漢字函數(shù)*/extern void Display_A_WORD(uchar P,uchar L,uchar *M)reentrant。/*************子函數(shù)定義***************//*************顯示年函數(shù)***************/extern void LCD_Initialize()。 /*選擇鍵*/sbit K2=P3^5。 總體硬件電路圖3程序設(shè)計(jì) 主程序流程圖 主函數(shù)流程圖 年月日時(shí)分秒++/流程圖 LCD初始化流程圖 通用顯示函數(shù)流程圖 模塊三DS18B20流程圖 1 讀取溫度值 源程序includeincludeincludedefine uchar unsigned chardefine uint unsigned intsbit SDA=P1^0。并且每次按下鍵后，都會(huì)通過(guò)蜂鳴器發(fā)出按鍵聲音。采用定時(shí)器0中斷，定時(shí)50ms，其中斷服務(wù)程序的功能是將時(shí)間和日期顯示到LCD上。電子時(shí)鐘采用數(shù)字電路實(shí)現(xiàn)對(duì)時(shí)、分、秒和數(shù)字顯示的計(jì)時(shí)裝置，廣泛使用于個(gè)人家庭、車(chē)站、機(jī)場(chǎng)等公共場(chǎng)所，成為人們?nèi)粘Ｉ钪胁豢扇鄙俚谋匦杵?，給人們的生活、學(xué)習(xí)、工作、娛樂(lè)帶來(lái)了極大的方便。隨著單片機(jī)技術(shù)廣泛地應(yīng)用與人們生活的各個(gè)方面，一些人們經(jīng)常使用的產(chǎn)品大多數(shù)是基于單片機(jī)研發(fā)的，如電子時(shí)鐘。以單片機(jī)和微控制器為核心仍然是當(dāng)今實(shí)現(xiàn)智能化技術(shù)的主流。如今的時(shí)鐘的功能更加全面，與機(jī)械時(shí)鐘相比具有更高的正確性和直觀性，且無(wú)機(jī)械裝置，具有更長(zhǎng)的壽命，因此廣泛地應(yīng)用于人類(lèi)正常生活中，得到人們的關(guān)注和研發(fā)。 電子時(shí)鐘的工作原理及其具體實(shí)現(xiàn)電子時(shí)鐘的工作原理是采用單片機(jī)最小系統(tǒng)，用DS1302時(shí)鐘芯片和12864LCD液晶顯示屏芯片以及DS18B20溫度傳感器分別進(jìn)行寄存相關(guān)信息、顯示年月日時(shí)分秒和采取溫度，用四個(gè)鍵分別實(shí)現(xiàn)選擇調(diào)整對(duì)象為、增加調(diào)節(jié)對(duì)象的數(shù)值、減少調(diào)節(jié)對(duì)象的數(shù)值和調(diào)整確定，采用24小時(shí)制、定時(shí)器0中斷和外部中斷0，從而實(shí)現(xiàn)可調(diào)式中文電子日歷、溫度及整點(diǎn)報(bào)時(shí)功能。當(dāng)要調(diào)整日期時(shí)間的時(shí)候，首先要按K1鍵來(lái)選擇調(diào)整對(duì)象，否則按其他鍵不會(huì)進(jìn)行時(shí)間調(diào)整，然后可以按K2和K3鍵對(duì)日期時(shí)間進(jìn)行加減調(diào)整，最后按K4鍵可以將改動(dòng)的日期時(shí)間重新顯示到LCD上。 時(shí)間調(diào)整電路圖 總電路圖。/*DS1302復(fù)位線*/sbit K1=P3^4。 /*確定鍵*/sbit SPK=P2^6。 /*顯示時(shí)間函數(shù)*/extern void Display_A_Char_8X16(uchar P,uchar L,ucha*M )reentrant。extern uchar Display_Digit[]={0,0,0,0}。/*所讀取的日期時(shí)間*/uchar DateTime[7]。/*星期幾的漢字點(diǎn)陣16乘16*/uchar code WEEKDAY_WORDS[]= { 0x00,0x00,0x00,0xFE,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0xFE,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x3F,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x3F,0x00,0x00,0x00,0x00, /*日*/ 0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0xC0,0x80,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*一*/ 0x00,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x06,0x04,0x00,0x00,0x00, 0x00,0x10,0x10,0x