基于單片機的實時日歷時鐘顯示系統(tǒng)

1、xxxxxxx學(xué) 院 本 科 畢 業(yè) 設(shè) 計（論文）基于單片機的實時時鐘顯示系統(tǒng)設(shè)計學(xué) 院（系）： 計算機科學(xué)與技術(shù)系 專 業(yè)： 通信工程 學(xué) 生 姓 名： 學(xué) 號： 指 導(dǎo) 教 師： 完 成 日 期： 摘 要20世紀末，電子技術(shù)獲得了飛速的發(fā)展，在其推動下，現(xiàn)代電子產(chǎn)品幾乎滲透了社會的各個領(lǐng)域，有力地推動了社會生產(chǎn)力的發(fā)展和社會信息化程度的提高，同時也使現(xiàn)代電子產(chǎn)品性能進一步提高，產(chǎn)品更新?lián)Q代的節(jié)奏也越來越快?，F(xiàn)代生活的人們越來越重視起了時間觀念，可以說是時間和金錢劃上了等號。對于那些對時間把握非常嚴格和準確的人或事來說，時間的不準確會帶來非常大的麻煩，所以以數(shù)碼管為顯示器的時鐘比指針式的時

2、鐘表現(xiàn)出了很大的優(yōu)勢。數(shù)碼管顯示的時間簡單明了而且讀數(shù)快、時間準確顯示到秒。而機械式的依賴于晶體震蕩器，可能會導(dǎo)致誤差。數(shù)字鐘是采用數(shù)字電路實現(xiàn)對“時”、“分”、“秒”數(shù)字顯示的計時裝置。數(shù)字鐘的精度、穩(wěn)定度遠遠超過老式機械鐘。在這次設(shè)計中，我們采用led數(shù)碼管顯示時、分、秒，以24小時計時方式，根據(jù)數(shù)碼管動態(tài)顯示原理來進行顯示，用12mhz的晶振產(chǎn)生振蕩脈沖，定時器計數(shù)。在此次設(shè)計中，電路具有顯示時間的其本功能，還可以實現(xiàn)對時間的調(diào)整。數(shù)字鐘是其小巧，價格低廉，走時精度高，使用方便，功能多，便于集成化而受廣大消費的喜愛，因此得到了廣泛的使用。關(guān)鍵字：數(shù)字電子鐘 單片機abstractthe

3、late 20th century, electronic technology has been rapid development in its promotion,penetration of modern electronic products will almost fields, a strong impetus to the development of social productive forces and social improvement in the level of information, while also further improve the perfor

4、mance of modern electronic products, replacement products have become increasingly fast pace. growing emphasis on modern life from the time the concept of time and money can be said to draw the equal sign. for those who are very strict and accurate grasp of time and things, time will not exactly bri

5、ng a very big trouble, so as to control the display of digital clock than the clock pointer showed a big advantage. digital display of time reading simple and fast, accurate display of time to seconds. the mechanical oscillator depends on the crystal may lead to errors. digital clock is a digital ci

6、rcuit implementation of the when, sub, seconds the figures show the timing device. digital clock precision, stability, far more than the old mechanical clock. in this design, we use led digital display hours, minutes, seconds, to 24-hour time mode, according to digital control theory to dynamic disp

7、lay to display, use the 12mhz crystal oscillation pulse, the timer count. in this design, the circuit has a display time of the this function, you can also realize the time adjustment. digital clock is its compact, low cost, travel time and high precision, easy to use, features and more, easy integr

8、ation and loved by the general consumer, so widely used. keywords: digital electronic clock scm前 言本例的功能是在51單片機系統(tǒng)中設(shè)置，獲取，記錄實時的日歷時鐘信息并通過數(shù)碼管顯示，要求能夠進行長時間的記錄，并且存儲的時間信息在掉電情況下至少保存10年以上。該系統(tǒng)包含5個模塊：51單片機模塊，日歷時鐘模塊，數(shù)碼管顯示模塊，串行通信模塊，c51程序。本系統(tǒng)用到的電路及程序如下： 程序代碼如下：#define_calendarclk_h / 防止calendarclk.h被重復(fù)引用#define_cal

9、endarclk_h#include #include #define uchar unsigned char#define unint unsigned int/* ds12c887 內(nèi)部專用寄存器宏定義 */#define min xbyte0x0102#define hour xbyte0x0104#define dayofweek xbyte0x0106#define dayofmonth xbyte0x0107#define month xbyte0x0108#define year xbyte0x0109#define reg_a xbyte0x010a#define reg_b

10、xbyte0x010b/* 由串口獲得的日歷時鐘信息變量，用于對芯片時間的設(shè)置 */uchar year1,month1,dayofweek1,dayofmonth1,hour1,min1;/* 芯片ds12c887提供的日歷時鐘信息變量 */uchar year2,month2,dayofweek2,dayofmonth2,hour2,min2;/* 從串行口獲取數(shù)據(jù)函數(shù)，數(shù)據(jù)包括：year1,month1,dayofweek1,dayofmonth1,hour1,min1。如果獲取到正確數(shù)據(jù)則返回1，否則返回0 */uchar getdata()/ 略去/* 設(shè)置日歷和時鐘函數(shù) */voi

11、d settime()reg_b = reg_b|0x80;/ set=1，芯片ds12c887處于設(shè)置狀態(tài)min = min1;hour = hour1;dayofweek = dayofweek1;dayofmonth = dayofmonth1;month = month1;year = year1;reg_b = reg_b&0x7f; / set=0，芯片ds12c887恢復(fù)正常數(shù)據(jù)更新狀態(tài)/* 獲取日歷時鐘信息函數(shù) */void gettime()while (reg_a&0x80=0x00)/ 直到uip=0時，才能讀取日歷時鐘信息min2 = min ;hour2 = hour

12、;dayofweek2 = dayofweek;dayofmonth2 = dayofmonth; month2 = month;year2 = year;/* 13位數(shù)碼管顯示年、月、日、星期、時、分 */void display()/ 略去/* 串口初始化函數(shù) */void init_serial()tmod = 0x20;/ 定時器t1使用工作方式2th1 = 250;tl1 = 250;tr1 = 1;/ 開始計時pcon = 0x80;/ smod = 1scon = 0x50;/ 工作方式1，波特率9600kbit/s，允許接收 void main(void)uchar setflag;init_serial();/* 設(shè)置dv2、dv1、dv0為010，打開芯片ds12c877內(nèi)部晶振 */reg_a = reg_a&0xaf;/ dv2=dv0=0reg_a = reg_a|0x20;/ dv1=0reg_b = reg_b&0x7b;/ set=0，時間數(shù)據(jù)正常更新；dm=0,二進制數(shù)