LED點(diǎn)陣數(shù)字鐘與溫度計(jì)

1、LED點(diǎn)陣數(shù)字鐘與溫度計(jì)一、系統(tǒng)設(shè)計(jì)方案本LED點(diǎn)陣數(shù)字鐘基于STC89C52RC單片機(jī)設(shè)計(jì)，使用5片6*7的LED點(diǎn)陣作為顯示屏。通過(guò)設(shè)計(jì)系統(tǒng)可以完成顯示時(shí)間，日期，并增加了用DS18B20溫度傳感器顯示溫度的功能。同時(shí)，通過(guò)程序的改變可以為點(diǎn)陣數(shù)字鐘擴(kuò)充例如鬧鐘，字幕滾屏等功能。 LED點(diǎn)陣數(shù)字鐘通過(guò)單片機(jī)來(lái)完成計(jì)時(shí)，設(shè)定，溫度測(cè)量等功能。顯示部分通過(guò)74HC595通用移位寄存器,完成點(diǎn)陣屏幕與單片機(jī)連接從而完成顯示部分的功能。其系統(tǒng)組成框圖如下：二、單元電路設(shè)計(jì)1.MCU控制部分單片機(jī)的時(shí)鐘周期由外部12M晶振，時(shí)間信息則通過(guò)DS1302產(chǎn)生。DS1302通過(guò)串行方式與單片機(jī)進(jìn)行數(shù)據(jù)傳送

2、,能夠向單片機(jī)提供包括秒、分、時(shí)、日、月、年等在內(nèi)的實(shí)時(shí)時(shí)間信息,并可對(duì)月末日期、閏年天數(shù)自動(dòng)進(jìn)行調(diào)整;它還擁有用于主電源和備份電源的雙電源引腳,在主電源關(guān)閉的情況下,也能保持時(shí)鐘的連續(xù)運(yùn)行。從而完成斷電計(jì)時(shí)的功能。其中DS1302采用32.768KHz的晶振提供時(shí)鐘周期（原理圖見附錄1）1 圖12.LED點(diǎn)陣顯示部分74HC595通用移位寄存器并行輸出端具有輸出鎖存功能。與單片機(jī)連接簡(jiǎn)單方便，只須三個(gè)I/O口即可。而且通過(guò)芯片的Q7引腳和SER引腳，可以級(jí)聯(lián)。點(diǎn)陣屏幕由5片6*7的LED點(diǎn)陣組成。采用74HC595來(lái)實(shí)現(xiàn)時(shí)鐘的動(dòng)態(tài)顯示。點(diǎn)陣屏幕段選碼由4片74HC595控制，段選數(shù)據(jù)由74H

3、C595的SER引腳串行輸入，由于輸出使能時(shí)鐘RCLK并接在一起，因此，4片74HC595并行輸出端同時(shí)輸出。而5個(gè)點(diǎn)陣位選信號(hào)也并接在一起，因此，一次可以同時(shí)點(diǎn)亮4列此過(guò)程類似于靜態(tài)顯示。每片74HC595并行輸出端并接到點(diǎn)陣的每一位的引腳，用于掃描輸出，此過(guò)程類似于動(dòng)態(tài)掃描過(guò)程。此方法運(yùn)用4片74HC595，7條位選信號(hào)，從而實(shí)現(xiàn)LED點(diǎn)陣的顯示.其中位選控制端為通過(guò)經(jīng)三極管放大后的P2口輸出信號(hào)控制。（原理圖見附錄2）3.電源部分采用普通電源接口和USB接口，可以使用5V，400mA電源供電，亦可使用電腦USB供電。預(yù)設(shè)備用電源紐扣電池接口，保證時(shí)鐘斷電后繼續(xù)走時(shí)。三、程序設(shè)計(jì)1. 定義

4、字符#include "reg52.h"#define uchar unsigned char#define uint unsigned int/74HC595管腳定義sbit S_DIO = P30;sbit S_CLK = P31; sbit R_CLK = P32;/按鍵管腳定義sbit KEY_1 = P11;sbit KEY_2 = P12; sbit KEY_3 = P10;/蜂鳴器管腳定義sbit BEEP = P27;/DS18B20管腳定義sbit DQ = P34;uchar temp_value;unsigned char tempL=0; /設(shè)全局變

5、量unsigned char tempH=0;unsigned int sdata;/測(cè)量到的溫度的整數(shù)部分unsigned char xiaoshu1;/小數(shù)第一位unsigned char xiaoshu2;/小數(shù)第二位unsigned char xiaoshu;/兩位小數(shù)bit fg=1; /溫度正負(fù)標(biāo)志，等于0時(shí)為負(fù)數(shù)/DS1302管腳定義sbit T_CLK = P35;sbit T_IO = P36;sbit T_RST = P37;sbit ACC0 = ACC0;sbit ACC1 = ACC1;sbit ACC2 = ACC2;sbit ACC3 = ACC3;sbit AC

6、C4 = ACC4;sbit ACC5 = ACC5;sbit ACC6 = ACC6;sbit ACC7 = ACC7;bitdistime,disdate,disyear,distweek,diswendu,setyear,setdate,settime,setalarm,setweek;unsigned char code Bmp74=0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xf

7、f,0xff,0xff,;unsigned char code font7=0x38,0x44,0x64,0x54,0x4C,0x44,0x38,/0xF8,0x88,0x88,0x88,0x88,0x88,0xF8, /-'0'0x10,0x18,0x10,0x10,0x10,0x10,0x38,/0x20,0x30,0x28,0x20,0x20,0x20,0xF8, /-'1'0x38,0x44,0x40,0x20,0x10,0x08,0x7C,/0xF8,0x80,0x80,0xF8,0x08,0x08,0xF8, /-'2'0x7C,0x

8、20,0x10,0x20,0x40,0x44,0x38,/0xF8,0x80,0x80,0xF8,0x80,0x80,0xF8, /-'3'0x20,0x30,0x28,0x24,0x7C,0x20,0x20,/0x48,0x48,0x48,0x48,0xF8,0x40,0x40, /-'4'0x7C,0x04,0x3C,0x40,0x40,0x44,0x38,/0xF8,0x08,0x08,0xF8,0x80,0x80,0xF8, /-'5'0x70,0x08,0x04,0x3C,0x44,0x44,0x38,/0xF8,0x08,0x08,0

9、xF8,0x88,0x88,0xF8, /-'6'0x7C,0x40,0x20,0x10,0x08,0x08,0x08,/0xF8,0x80,0x80,0x80,0x80,0x80,0x80, /-'7'0x38,0x44,0x44,0x38,0x44,0x44,0x38,/0xF8,0x88,0x88,0xF8,0x88,0x88,0xF8, /-'8'0x38,0x44,0x44,0x78,0x40,0x20,0x1C,/0xF8,0x88,0x88,0xF8,0x80,0x80,0x80, /-'9'0x00,0x30,0x

10、30,0x00,0x30,0x30,0x00, /-10-':'0x78,0x48,0x78,0x48,0x78,0x48,0x64, /-11-'月'0x78,0x48,0x48,0x78,0x48,0x48,0x78, /-12-'日'0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, /-13-''0x00,0x00,0x00,0x00,0x00,0x00,0x00, /-14-' '0x3C,0x44,0x44,0x44,0x44,0x44,0x3C, /-15-' D'

11、0x44,0x44,0x44,0x28,0x10,0x10,0x10, /-16-' Y'0x08,0xF8,0x24,0xF8,0x28,0xFC,0x20, /-17-'年'0x88,0xA8,0xA8,0xA8,0xA8,0xF8,0x70, /-18-' W'0x88,0x48,0x28,0x18,0x28,0x48,0x88, /-19-' K'0x00,0x00,0x00,0x38,0x00,0x00,0x00, /-20-'-'0x00,0x00,0x00,0x00,0x00,0x30,0x30, /

12、-21-'.'0xE8,0x10,0x10,0x10,0x10,0x10,0xE0, /-22-''unsigned char idata DisTemp57;unsigned char idata Dis5;/時(shí)鐘數(shù)據(jù)(7字節(jié)BCD碼)格式為： 秒 分 時(shí) 日 月星期 年 unsigned char idata Time7;/=0x30,0x42,0x23,0x18,0x06,0x04,0x09; unsigned char idata alarm2=0x30,0x06;uchar alarm_hh,alarm_ss,alarm_fg,alarm_off,fl

13、ag;/鬧鐘unsigned char idata CSRow7=0x01,0x02,0x04,0x08,0x10,0x20,0x40;unsigned char idata second,minute,hour,day,month,week,year,time_revise; unsigned char idata keyvalue;unsigned long int idata Disbuf5;unsigned long int idata Disbuftemp7;unsigned int ss,i,TimeT1;/* 函數(shù)名： Delay* 功能描述：延時(shí)（帶參數(shù)）*/void Dela

14、y(unsigned int i)unsigned int j;for(j=0;j<i;j+);/* 函數(shù)名： KeyOff* 功能描述：*/void KeyOff()if(keyvalue=2|keyvalue=1|keyvalue=3)alarm_off=1;/* 函數(shù)名： OutData* 功能描述：*/void OutData(unsigned char Data)SBUF=Data;while(TI=0);TI=0;/* 函數(shù)名： BCD2HEX* 功能描述：*/unsigned char BCD2HEX(unsigned char BCDChar)unsigned char

15、temp;temp=(BCDChar/16*10+BCDChar%16);return temp;/* 函數(shù)名： HEX2BCD* 功能描述：*/unsigned char HEX2BCD(unsigned char HEXChar)unsigned char temp;temp=(HEXChar/10*16+HEXChar%10);return temp;/* 函數(shù)名： WriteByteDS1302* 功能描述：*/void WriteByteDS1302(unsigned char Data)unsigned char i;ACC = Data;for(i=8; i>0; i-)T

16、_IO = ACC0;T_CLK = 1;T_CLK = 0;ACC = ACC >> 1;/* 函數(shù)名： ReadByteDS1302* 功能描述：*/ unsigned char ReadByteDS1302(void)unsigned char i;for(i=8; i>0; i-)ACC = ACC >>1;ACC7 = T_IO;T_CLK = 1;T_CLK = 0;return(ACC);/* 函數(shù)名： WriteDS1302* 功能描述：*/void WriteDS1302(unsigned char Addr,unsigned char Data

17、)T_RST = 0;T_CLK = 0;T_RST = 1;WriteByteDS1302(Addr);WriteByteDS1302(Data);T_CLK = 1;T_RST = 0;/* 函數(shù)名： ReadDS1302* 功能描述：*/unsigned char ReadDS1302(unsigned char Addr)unsigned char Data;T_RST = 0;T_CLK = 0;T_RST = 1;WriteByteDS1302(Addr);Data = ReadByteDS1302();T_CLK = 1;T_RST = 0;return(Data);/* 函數(shù)名

18、： Set* 功能描述：設(shè)置*/void Set(unsigned char sel,unsigned char selby)unsigned char address,item;unsigned char max,min;if(sel=0) address=0x80; max=59;min=0; /秒if(sel=1) address=0x82; max=59;min=0; /分鐘if(sel=2) address=0x84; max=23;min=0; /小時(shí)if(month=2)if(flag=1)if(sel=3) address=0x86; max=28;min=1;elseif(s

19、el=3) address=0x86; max=27;min=1;elseif(month=1|month=3|month=5|month=7|month=8|month=10|month=12) if(sel=3) address=0x86; max=31;min=1;if(month=4|month=6|month=9|month=11)if(sel=3) address=0x86; max=30;min=1;if(sel=4) address=0x88; max=12;min=1; /月if(sel=5) address=0x8a; max=7; min=1; /星期if(sel=6)

20、address=0x8c; max=99;min=0; /年if(sel=7) address=0xc0; max=59;min=0; /鬧鐘分鐘if(sel=8) address=0xc2; max=23;min=0; /鬧鐘小時(shí)item=ReadDS1302(address+1)/16*10+ReadDS1302(address+1)%16;if (selby=0) item+; else item-;if(item>max) item=min;if(item<min) item=max;WriteDS1302(0x8e,0x00);WriteDS1302(address,it

21、em/10*16+item%10);WriteDS1302(0x90,0xa5);WriteDS1302(0x8e,0x80);/* 函數(shù)名： SetTime* 功能描述：*/void SetTime(unsigned char *pClock)unsigned char h;unsigned char Addr=0x80;WriteDS1302(0x8e,0x00);for(h=7; h>0; h-)WriteDS1302(Addr,*pClock);pClock+;Addr+=2;WriteDS1302(0x90,0xa5);WriteDS1302(0x8e,0x80);/* 函數(shù)名

22、： ReadTime* 功能描述：*/void ReadTime()Second = BCD2HEX(Time0=ReadDS1302(0x81);minute = BCD2HEX(Time1=ReadDS1302(0x83);hour = BCD2HEX(Time2=ReadDS1302(0x85);day = BCD2HEX(Time3=ReadDS1302(0x87);month = BCD2HEX(Time4=ReadDS1302(0x89);year = BCD2HEX(Time5=ReadDS1302(0x8d);week = BCD2HEX(Time6=ReadDS1302(0x

23、8b);alarm_ss = BCD2HEX(alarm0=ReadDS1302(0xc1);alarm_hh = BCD2HEX(alarm1=ReadDS1302(0xc3);/* 函數(shù)名： WriteTime* 功能描述：*/void WriteTime()WriteDS1302(0x8e,0x00);WriteDS1302(0x80,HEX2BCD(second);WriteDS1302(0x82,HEX2BCD(minute);WriteDS1302(0x84,HEX2BCD(hour);WriteDS1302(0x86,HEX2BCD(day);WriteDS1302(0x88,H

24、EX2BCD(month);WriteDS1302(0x8A,HEX2BCD(week);WriteDS1302(0x8C,HEX2BCD(year);WriteDS1302(0xc0,HEX2BCD(alarm_ss);WriteDS1302(0xc2,HEX2BCD(alarm_hh);WriteDS1302(0x90,0xa5);WriteDS1302(0x8e,0x80);/* 函數(shù)名： StopTime* 功能描述：*/void StopTime()second = BCD2HEX(Time0=ReadDS1302(0x81);WriteDS1302(0x8e,0x00);Write

25、DS1302(0x80,HEX2BCD(second)|0x80);WriteDS1302(0x90,0xa5);WriteDS1302(0x8e,0x80);/* 函數(shù)名： StartTime* 功能描述：*/void StartTime()WriteDS1302(0x8e,0x00);WriteDS1302(0x80,HEX2BCD(second)&0x7f);WriteDS1302(0x90,0xa5);WriteDS1302(0x8e,0x80);/溫度處理程序/*ds18b20延遲子函數(shù)（晶振12MHz ）*/void delay_18B20(unsigned int i)w

26、hile(i-);/*ds18b20初始化函數(shù)*/void Init_DS18B20(void)unsigned char x=0;DQ = 1; /DQ復(fù)位delay_18B20(16); /稍做延時(shí)DQ = 0; /單片機(jī)將DQ拉低delay_18B20(160); /精確延時(shí) 大于 480usDQ = 1; /拉高總線delay_18B20(28);x=DQ; /稍做延時(shí)后 如果x=0則初始化成功 x=1則初始化失敗 delay_18B20(40);/*ds18b20讀一個(gè)字節(jié)*/unsigned char ReadOneChar(void)uchar i=0;uchar dat = 0

27、;for (i=8;i>0;i-)DQ = 0; / 給脈沖信號(hào)dat>>=1;DQ = 1; / 給脈沖信號(hào)if(DQ)dat|=0x80;delay_18B20(8);return(dat);/*ds18b20寫一個(gè)字節(jié)*/void WriteOneChar(uchar dat)unsigned char i=0;for (i=8; i>0; i-)DQ = 0;DQ = dat&0x01;delay_18B20(10);DQ = 1;dat>>=1;/*讀取ds18b20當(dāng)前溫度*函數(shù)名：ReadTemperature(void)*功能描述：讀

28、溫度值（低位放tempL;高位放tempH;）*/void ReadTemp(void)Init_DS18B20(); /初始化WriteOneChar(0xcc); /跳過(guò)讀序列號(hào)的操作WriteOneChar(0x44); /啟動(dòng)溫度轉(zhuǎn)換delay_18B20(200); /轉(zhuǎn)換需要一點(diǎn)時(shí)間，延時(shí)Init_DS18B20(); /初始化WriteOneChar(0xcc); /跳過(guò)讀序列號(hào)的操作WriteOneChar(0xbe); /讀溫度寄存器（頭兩個(gè)值分別為溫度的低位和高位） tempL=ReadOneChar(); /讀出溫度的低位LSBtempH=ReadOneChar(); /

29、讀出溫度的高位MSBif(tempH>0x7f) /最高位為1時(shí)溫度是負(fù)tempL=tempL+1; /補(bǔ)碼轉(zhuǎn)換，取反加一tempH=tempH;fg=0; /讀取溫度為負(fù)時(shí)fg=0else fg=1;sdata = tempL/16+tempH*16; /整數(shù)部分xiaoshu1 = (tempL&0x0f)*10/16; /小數(shù)第一位xiaoshu2 = (tempL&0x0f)*100/16;/小數(shù)第二位xiaoshu=xiaoshu1*10+xiaoshu2; /小數(shù)兩位/溫度處理程序結(jié)束/* 函數(shù)名： DisPlay* 功能描述：*/void DisPlay()

30、unsigned char i,j;for(i=0;i<7;i+)P2=0xFF;for(j=0;j<4;j+)OutData(unsigned char *)&Disbuftempi)3-j);R_CLK=1;R_CLK=0;P2=CSRowi;BEEP=1;Delay(250);P2=0xff;/* 函數(shù)名： SetDis* 功能描述：設(shè)置顯示內(nèi)容菜單*/void SetDis()if(distime=1)/時(shí)分顯示，秒針閃動(dòng)if(hour/10)=0)Dis0=14;elseDis0=hour/10;Dis1=hour%10;Dis3=minute/10;Dis4=m

31、inute%10;if(second%10)%2)Dis2=14;elseDis2=10;else if(disdate=1)/月、日顯示Dis0=month/10;Dis1=month%10;Dis3=day/10;Dis4=day%10;Dis2=20;else if(disyear=1)/年顯示Dis0=2;Dis1=0;Dis2=year/10;Dis3=year%10;Dis4=17;else if(distweek=1)/星期顯示Dis0=18;Dis1=19;Dis2=14;Dis3=14;Dis4=week%10;else if(diswendu=1)/顯示溫度if(fg=0)

32、Dis0=20;elseDis0=sdata/10;Dis1=sdata%10;Dis2=21;Dis3=xiaoshu1;Dis4=22;else if(settime=1)/設(shè)定時(shí)間顯示、秒不閃動(dòng) if(hour/10)=0)Dis0=14;elseDis0=hour/10;Dis1=hour%10;Dis3=minute/10;Dis4=minute%10;Dis2=10;else if(setalarm=1)/設(shè)定鬧鐘時(shí)分 if(alarm_hh/10)=0)Dis0=14;elseDis0=alarm_hh/10; Dis1=alarm_hh%10;Dis3=alarm_ss/10;

33、Dis4=alarm_ss%10;Dis2=10;else if(setdate=1)/月、日顯示 Dis0=month/10;Dis1=month%10;Dis3=day/10;Dis4=day%10;Dis2=20;else if(setyear=1)/年顯示 Dis0=2;Dis1=0;Dis2=year/10;Dis3=year%10;Dis4=17;else if(setweek=1)/星期顯示 Dis0=18;Dis1=19;Dis2=14;Dis3=14;Dis4=week%10;/* 函數(shù)名： DisProcess* 功能描述：裝載顯示數(shù)據(jù)*/void DisProcess()

34、unsigned char i,j;for(i=0;i<5;i+)for(j=0;j<7;j+)DisTempij=fontDisij;for(i=0;i<7;i+)Disbuf0=DisTemp4i;Disbuf1=DisTemp3i;Disbuf2=DisTemp2i;Disbuf3=DisTemp1i;Disbuf4=DisTemp0i;Disbuftempi=Disbuf0<<24|Disbuf1<<18|Disbuf2<<12|Disbuf3<<6|Disbuf4;/* 函數(shù)名： KeyCheck* 功能描述：*/vo

35、id KeyCheck()if(KEY_1=0)DisPlay();if(KEY_1=0)keyvalue=1;for(i=0;i<1000;i+)BEEP = 0;while(KEY_1=0)DisPlay();if(KEY_2=0)DisPlay();if(KEY_2=0)keyvalue=2;for(i=0;i<1000;i+)BEEP = 0;while(KEY_2=0)DisPlay();if(KEY_3=0)DisPlay();if(KEY_3=0)keyvalue=3;for(i=0;i<1000;i+)BEEP = 0;while(KEY_3=0)DisPla

36、y();/* 函數(shù)名： KeyProcess* 功能描述：*/void KeyProcess()if(keyvalue=3)if(distime)/轉(zhuǎn)換設(shè)置年distime=0;disdate=0;disyear=0;distweek=0;diswendu=0;setyear=1;setdate=0;setweek=0;settime=0;setalarm=0;TR0=0;StopTime();/停止時(shí)鐘 else if(setyear)/轉(zhuǎn)換設(shè)置月、日 distime=0;disdate=0;disyear=0;distweek=0;diswendu=0;setyear=0;setdate=

37、1;setweek=0;settime=0;setalarm=0;else if(setdate)/轉(zhuǎn)換設(shè)置星期 distime=0;disdate=0;disyear=0;distweek=0;diswendu=0;setyear=0;setdate=0;setweek=1;settime=0;setalarm=0;else if(setweek)/轉(zhuǎn)換設(shè)置時(shí)間 distime=0;disdate=0;disyear=0;distweek=0;diswendu=0;setyear=0;setdate=0;setweek=0;settime=1;setalarm=0;else if(setti

38、me)/轉(zhuǎn)換設(shè)置鬧鐘 distime=0;disdate=0;disyear=0;distweek=0;diswendu=0;setyear=0;setdate=0;setweek=0;settime=0;setalarm=1;else if(setalarm)/轉(zhuǎn)換顯示時(shí)間 distime=1;disdate=0;disyear=0;distweek=0;diswendu=0;setyear=0;setdate=0;setweek=0;settime=0;setalarm=0;TR0=1;/ StartTime();/啟動(dòng)時(shí)鐘 keyvalue=0;else if(keyvalue=1&am

39、p;&settime=1) Set(2,0);keyvalue=0;else if(keyvalue=2&&settime=1) Set(1,0);keyvalue=0;else if(keyvalue=1&&setdate=1) Set(4,0);keyvalue=0;else if(keyvalue=2&&setdate=1)Set(3,0);keyvalue=0;else if(keyvalue=1&&setyear=1)Set(6,0);keyvalue=0;else if(keyvalue=2&&setyear=1)Set(6,1);keyvalue=0;else if(keyvalue=1&&setweek=1)Set(5,0);keyvalue=0;else if(keyvalue=2&&setweek=1)Set(5,1);keyvalue=0;else if(keyvalue=1&&setalarm=1)Set(8,0);keyvalue=0;else if(keyvalue=2&&setalarm=1