基于51单片机的1602液晶显示温度和时间的C程序
基于51单片机的1602液晶显示温度和时间的C程序
//液晶显示温度#include "AT89X52.H"#define Ddata P0sbit RS=P2^7; //命令数据控制端sbit RW=P2^6; //读写选择端sbit LCDE=P2^5; //液晶使能端sbit DQ=P2^0; //ds18b20与单片机连接口#define uchar unsigned char#define uint unsigned intunsigned char hour=0,min=0,sec=0; //定义初值unsigned int count=0;unsigned char line1[16]={" temp: "}; //16个字符unsigned char line2[16]={" time: 00:00:00"}; //16个字符unsigned char tab[]={'0','1','2','3','4','5','6','7','8','9'}; //数组uchar data disdata[5];uint tvalue; //温度值uchar tflag; //温度正负标志void time();/*************************lcd1602程序**************************/ void delay1ms(unsigned int ms)//延时1毫秒（不够精确的）{unsigned int i,j;for(i=0;i<ms;i++)for(j=0;j<110;j++);}void delay5ms()//延时5毫秒（不够精确的）{unsigned int i;for (i=0;i<1000;i++);}void delay50us(){register int i;for (i=0;i<20;i++);}void delay(){unsigned char m,n;for(m=255;m>0;m--)for(n=255;n>0;n--);}void wr_com(unsigned char comm) //********写控制字符程序E=1 RS=0RW=0 **********//{LCDE=0; //使能端RS=0; //********RS寄存器选择输入端，当RS=0；当进行写模块操作，指向指令寄存器。
单片机万年历温度检测C程序(1302+1820+1602+51)
1302+1820+1602+51万年历#include<reg51.H>#include<INTRINS.H>#define uchar unsigned char#define uint unsigned int#define TIME (0X10000-50000)#define FLAG 0XEF //闹钟标志//引脚连接图sbit rst=P3^5;sbit clk=P3^4;sbit io=P3^3;sbit rs=P1^5;sbit rw=P1^6;sbit e=P1^7;sbit DQ=P1^4; //温度输入口sbit beep=P3^2;sbit ACC_7=ACC^7;//全局变量及常量定义uchar i=20,j,time1[16];uchar alarm[2],time2[15],time[3];uchar code Day[]={31,28,31,30,31,30,31,31,30,31,30,31};//12个月的最大日期(非闰年)//音律表uint code table1[]={64260,64400,64524,64580,64684,64777,64820,64898,64968,65030,65058,65110,65157,65178,65217};//发声部分的延时时间uchar code table2[]={0x82,1,0x81,0xf4,0xd4,0xb4,0xa4,0x94,0xe2,1,0xe1,0xd4,0xb4,0xc4,0xb4,4,0};//LCD自建字uchar code tab[]={0x18,0x1b,5,4,4,5,3,0,0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02,//年0x0f,0x09,0x0f,0x09,0x0f,0x09,0x11,0x00,//月0x0f,0x09,0x09,0x0f,0x09,0x09,0x0f,0x00};//日//*******温度小数部分用查表法**********//uchar codeditab[16]={0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x04,0x05,0x06,0x06,0x0 7,0x08,0x08,0x09,0x09};//闹钟中用的全局变量uchar th1,tl1;uchar temp_ioa[2]={0x00,0x00}; // 读出温度暂放bit flag; //18b20存在标志位/***********11微秒延时函数**********/delay(uint t){for(;t>0;t--);}/***********18B20复位函数**********/ow_reset(void){uchar i;DQ=1;_nop_();_nop_();DQ=0; //delay(50); // 550usDQ=1; //delay(6); // 66usfor(i=0;i<0x30;i++){if(!DQ)goto d1;}flag=0; //清标志位,表示ds1820不存在DQ=1;return;d1: delay(45); //延时500usflag=1;DQ=1; //置标志位,表示ds1820存在}/**********18B20写命令函数*********///向 1-WIRE 总线上写一个字节void write_byte(uchar val){uchar i;for (i=8; i>0; i--) //{DQ=1;_nop_();_nop_();DQ=0;_nop_();_nop_();_nop_();_nop_();_nop_();//5us DQ=val&0x01; //最低位移出delay(6); //66usval=val/2; //右移一位}DQ=1;delay(1);}/*********18B20读1个字节函数********///从总线上读取一个字节uchar read_byte(void){uchar i;uchar value=0;for (i=8;i>0;i--){DQ=1;_nop_();_nop_();value>>=1;DQ=0; //_nop_();_nop_();_nop_();_nop_(); //4usDQ=1;_nop_();_nop_();_nop_();_nop_(); //4usif(DQ)value|=0x80;delay(6); //66us}DQ=1;return(value);}/***********读出温度函数**********/read_temp(){ow_reset(); //总线复位if(!flag) //判断ds1820是否存在?若ds18b20不存在则返回 return;//write_byte(0xCC); // Skip ROM//write_byte(0x44); // 发转换命令//delay(70);write_byte(0xCC); //发Skip ROM命令write_byte(0xBE); //发读命令temp_ioa[0]=read_byte(); //温度低8位temp_ioa[1]=read_byte(); //温度高8位ow_reset();write_byte(0xCC); // Skip ROMwrite_byte(0x44); // 发转换命令}/***********温度数据处理函数**********/work_temp(){uchar n=0,m;if(temp_ioa[1]>127)//负温度求补码{temp_ioa[1]=(256-temp_ioa[1]);temp_ioa[0]=(256-temp_ioa[0]);n=1;}time2[13]=ditab[temp_ioa[0]&0x0f]+'0';time2[12]='.';m=((temp_ioa[0]&0xf0)>>4)|((temp_ioa[1]&0x0f)<<4);// if(n){m-=16;}time2[9]=m/100+'0';time2[11]=m%100;time2[10]=time2[11]/10+'0';time2[11]=time2[11]%10+'0';if(time2[9]=='0')//最高位为0时都不显示{time2[9]=0x20;if(n)//负温度时最高位显示"-"{time2[9]='-';}if(time2[10]=='0'){if(n){time2[10]='-';time2[9]=0x20;}elsetime2[10]=0x20;if(time2[11]=='0'&&time2[13]=='0')time2[11]=time2[12]=0x20;}}}delay1ms(uchar time) //延时1ms{uchar i,j;for(i=0;i<time;i++){for(j=0;j<250;j++);}}//LCD驱动部分enable(){rs=0;rw=0;e=0;delay1ms(3);e=1;}write2(uchar i){P0=i;rs=1;rw=0;e=0;delay1ms(2);e=1;}write1(uchar data *address,m) {uchar i,j;for(i=0;i<m;i++,address++) {j=*address;write2(j);}}//LCD显示lcdshow(){P0=0XC; //显示器开、光标关enable();P0=0x80; //写入显示起始地址enable();write1(time1,16);P0=0xc1; //写入显示起始地址enable();write1(time2,15);}//自建字zijianzi(){uchar i;P0=0x40;enable();for(i=0;i<32;i++){write2(tab[i]);delay1ms(2);}}//DS1302读写子程序write(uchar address){uchar i;clk=0;_nop_();rst=1;_nop_();for(i=0;i<8;i++){io=address&1;_nop_();clk=1;address>>=1;clk=0;}}uchar read(){uchar i,j=0;for(i=0;i<8;i++){j>>=1;_nop_();clk=0;_nop_();if(io)j|=0x80;_nop_();clk=1;}return(j);}//部分显示数据初始化timestart(){time1[1]=time1[13]=time2[8]=time2[9]=time2[10]=0x20,time2[14]=0; time1[6]=1,time1[9]=2,time1[12]=3,time1[2]='2',time1[3]='0'; time1[14]='W',time2[2]=time2[5]=':';write(0xc1);alarm[0]=read();rst=0;write(0xc3);alarm[1]=read();rst=0;write(0xc5);time1[0]=read();rst=0;}//读取时间readtime(){uchar i,m,n;write(0x8d); //读取年份m=read();rst=0;time1[4]=m/16+0x30;time1[5]=m%16+0x30;write(0x8b); //读取星期m=read();rst=0;time1[15]=m+0x30;for(i=7,n=0x89;i<11;i+=3,n-=2) //读取月份和日期{write(n);m=read();rst=0;time1[i]=m/16+0x30;time1[i+1]=m%16+0x30;}for(m=0,i=0,n=0x85;i<7;i+=3,n-=2,m++) //读取时,分,秒{write(n);time[m]=read();rst=0;time2[i]=time[m]/16+0x30;time2[i+1]=time[m]%16+0x30;}}time0() interrupt 1 using 1{i--;if(i==0){if(j!=0)j--;i=20;}TH0=TIME/256,TL0=TIME%256;}//闹钟部分intime1() interrupt 3{TH1=th1,TL1=tl1;beep=!beep;}showalarm(){uchar i,j,a,b,n;ET1=1;for(j=0;j<6;j++){i=0;while(1){a=table2[i];if(a==0)break;b=a&0xf;a>>=4;if(a==0){TR1=0;goto D1;}a=((--a)<<1)/2;TH1=th1=table1[a]/256,TL1=tl1=table1[a]%256; TR1=1;D1: do{b--;for(n=0;n<3;n++){readtime();lcdshow();P2=0xf7;if(P2==0xe7){delay1ms(100);if(P2==0xe7){TR1=0;ET1=0;return;}}}}while(b!=0);i++;}TR1=0;}ET1=0;}//根据日期的变动自动调整星期uchar setweek(){uchar i=5,j,n;j=(time1[4]&0xf)*10+(time1[5]&0xf); n=j/4;i=i+5*n;n=j%4;if(n==1)i+=2;else if(n==2)i+=3;else if(n==3)i+=4;j=(time1[7]&0xf)*10+(time1[8]&0xf); if(j==2)i+=3;else if(j==3)i+=3;else if(j==4)i+=6;else if(j==5)i+=1;else if(j==6)i+=4;else if(j==7)i+=6;else if(j==8)i+=2;else if(j==9)i+=5;else if(j==11)i+=3;else if(j==12)i+=5;if(n==0)if(j>2)i++;j=(time1[10]&0xf)*10+(time1[11]&0xf);i+=j;i%=7;if(i==0)i=7;return(i);}//设置时间settime(){uchar i=0x85,year,month,day,n;time2[6]=time2[7]=0x30,time1[14]=time1[15]=0x20; lcdshow();while(1){P0=0xe; //显示器开、光标开enable();P0=i; //定光标enable();P2=0xf7;if(P2!=0XF7){delay1ms(100); //延时0.1s去抖动if(P2!=0XF7){j=7;if(P2==0X77){i+=3;if(i==0x8e)i=0xc2;else if(i>0xc5)i=0x85;}else if(P2==0xb7){year=(time1[4]&0xf)*10+(time1[5]&0xf); month=(time1[7]&0xf)*10+(time1[8]&0xf); day=(time1[10]&0xf)*10+(time1[11]&0xf); if(i==0x85){year++;if(year>99)year=0;if((year%4)!=0)if(month==2&&day==29)day=28;}else if(i==0x88){month++;if(month>12)month=1;if(day>Day[month-1]){day=Day[month-1];if(month==2&&(year%4)==0)day=29;}}else if(i==0x8b){day++;if(day>Day[month-1]){if(month==2&&(year%4)==0){if(day>29)day=1;}if(month!=2)day=1;}}else if(i==0xc2){n=(time2[0]&0xf)*10+(time2[1]&0xf);n++;if(n>23)n=0;time2[0]=n/10+0x30;time2[1]=n%10+0x30;}else{n=(time2[3]&0xf)*10+(time2[4]&0xf);n++;if(n>59)n=0;time2[3]=n/10+0x30;time2[4]=n%10+0x30;}time1[4]=year/10+0x30;time1[5]=year%10+0x30;time1[7]=month/10+0x30;time1[8]=month%10+0x30;time1[10]=day/10+0x30;time1[11]=day%10+0x30;lcdshow();}else if(P2==0xd7){write(0x8c);write((time1[4]&0xf)*16+(time1[5]&0xf));rst=0;write(0x8a);write(setweek());rst=0;for(i=7,n=0x88;i<11;i+=3,n-=2){write(n);write((time1[i]&0xf)*16+(time1[i+1]&0xf)); rst=0;}for(i=0;i<7;i+=3,n-=2){write(n);write((time2[i]&0xf)*16+(time2[i+1]&0xf)); rst=0;}TR0=0;time1[14]='W';return;}else{TR0=0;time1[14]='W';return;}}}if(j==0){TR0=0;time1[14]='W';return;}}}//设置闹钟setalarm(){uchar i,n;for(i=1;i<16;i++){time1[i]=0x20;}time2[0]=alarm[0]/16+0x30;time2[1]=(alarm[0]&0xf)+0x30;time2[3]=alarm[1]/16+0x30;time2[4]=(alarm[1]&0xf)+0x30;time2[6]=time2[7]=0x30;lcdshow();i=0xc2;while(1){P0=0xe; //显示器开、光标开enable();P0=i; //定光标enable();P2=0xf7;if(P2!=0XF7){delay1ms(100); //延时0.1s去抖动 if(P2!=0XF7){j=7;if(P2==0X77){i+=3;if(i>0xc5)i=0xc2;}else if(P2==0xb7){if(i==0xc2){n=(time2[0]&0xf)*10+(time2[1]&0xf);n++;if(n>23)n=0;time2[0]=n/10+0x30;time2[1]=n%10+0x30;}else{n=(time2[3]&0xf)*10+(time2[4]&0xf);n++;if(n>59)n=0;time2[3]=n/10+0x30;time2[4]=n%10+0x30;}lcdshow();}else if(P2==0xd7){write(0xc0);write((time2[0]&0xf)*16+(time2[1]&0xf)); rst=0;write(0xc2);write((time2[3]&0xf)*16+(time2[4]&0xf)); rst=0;time1[0]=FLAG;write(0xc4);write(time1[0]);rst=0;TR0=0;timestart();return;}else{TR0=0;timestart();return;}}}if(j==0){TR0=0;timestart();return;}}}main(){IE=0X82;TMOD=0x11;write(0x8E); //禁止写保护write(0);rst=0;P0=1; //清屏并光标复位enable();P0=0X38; //设置显示模式:8位2行5x7点阵enable();P0=6; //文字不动,光标自动右移enable();zijianzi(); //自建字timestart();while(1){readtime(); //读取时间read_temp(); //读出18B20温度数据 work_temp(); //处理温度数据lcdshow(); //显示时间if(time1[0]!=0x20)if(time[0]==alarm[0])if(time[1]==alarm[1])if(time[2]==0)showalarm();P2=0xf7;if((P2&0XF0)!=0XF0){delay1ms(100); //延时0.1s去抖动 if((P2&0XF0)!=0XF0){j=7;TH0=TIME/256,TL0=TIME%256;TR0=1;if(P2==0x77){settime();}else if(P2==0XB7){setalarm();}else if(P2==0XD7){TR0=0;if(time1[0]==FLAG)time1[0]=0x20;elsetime1[0]=FLAG;write(0xc4);write(time1[0]);rst=0;}}}delay1ms(100);}}单片机万年历——基于1302和1602（1篇）2009-12-06 21:191302和1602的接法在我相册里面使用1602液晶显示DS1302+c51时钟[注12M晶振]=============================================================*/#include <AT89x52.h>#include <string.h>#include < intrins.h >#define delayNOP() ; {_nop_() ;_nop_() ;_nop_() ;_nop_() ;} ;#define LCM_RW P3_1 //定义引脚#define LCM_RS P3_0#define LCM_E P3_2#define LCM_Data P0#define Busy 0x80 //用于检测LCM状态字中的Busy标识#define uchar unsigned charsbit T_CLK=P2^4;sbit T_IO =P2^5;sbit T_RST=P2^6;sbit ACC0=ACC^0;sbit ACC7=ACC^7;sbit system=P1^1; //模式sbit TimerUp=P1^2; //时间加sbit TimerDown=P1^0; //时间减sbit Speaker=P2^1; //蜂鸣器void Set(uchar,uchar); //根据选择调整相应项目void RTInputByte(uchar); //输入 1Byte */uchar RTOutputByte(void); //输出 1Byte */void W1302(uchar, uchar); //向DS1302写入一个字节uchar R1302(uchar); //从DS1302读出一个字节void Set1302(uchar * ); //设置时间void KeySound(); //按键音void ClockSound(); //闹铃蜂鸣声uchar id,msec,model,LedTime,d;bit a,b; //闪烁标志位uchar inittime[7]={0x00,0x10,0x19,0x29,0x03,0x04,0x06}; //初始化后设置为：06年3月29日星期3 19点10分0秒void Out_LCM(void); //显示屏幕void model0(void); //显示输出void model1(void);void model2(void);void model3(void);void model4(void);void model5(void);void model6(void);void id_case1_key(); //项目调整void Modset(); //模式键处理void WriteDataLCM(uchar WDLCM);void WriteCommandLCM(uchar WCLCM,BuysC);uchar ReadStatusLCM(void);void LCMInit(void);void OutputInformation(uchar X, uchar Y, uchar DData);void DisplayListChar(uchar X, uchar Y, uchar code *DData);void Delay5Ms(void);void Delay400Ms(void);void systemsetup(void); //进入系统设置uchar code systemp[]={"System.setup"}; //字符串输出(系统设定)uchar code TIMER[]={"Time"}; //字符串输出(时间)uchar code DATE[]={"Date"}; //字符串输出(日期)uchar code alarmclock[]={"Clock"}; //字符串输出（闹铃）uchar code lamp[]={"Lamp"}; //字符串输出（背光灯）uchar code reset[]={"Reset"}; //字符串输出（时间归零）uchar code exit[]={"Exit"}; //字符串输出（退出）uchar code set[]={"Set"}; //字符串输出（设置）uchar code sec[]={"sec"}; //字符串输出（秒）uchar code ClockSet[]={"ClockSet"}; //字符串输出（闹铃设置）uchar code ClockOn[]={"ON"}; //字符串输出（ON）uchar code ClockOff[]={"OFF"}; //字符串输出（OFF）void timesetup(void); //时间设置void datesetup(void); //日期设置void alarmclockset(void); //闹铃设置void lampsetup(void); //背光灯设置void timereset(void); //时间清零/*******************************************************************/ void delay1(int ms){unsigned char y ;while(ms--){for(y = 0 ; y<250 ; y++){_nop_() ;_nop_() ;_nop_() ;_nop_() ;}}}void main(void){Speaker=1; //关闭蜂鸣器LED=0; //打开LED ,低电平有效，外接9012驱动Delay400Ms(); //启动等待，等LCM讲入工作状态Delay400Ms();LCMInit(); //LCM初始化TMOD=0x01; //16位定时TH0=0x3c; //50msTL0=0xb0;EA=1;TR0=1;ET0=1;while(1){if(TimerDown==0) //左移键按下后把背光灯打开{Delay5Ms();if(TimerDown==0){KeySound(); //蜂鸣声LED=0; //打开背光灯LedTime=R1302(0xc1)/16*10+R1302(0xc1)%16;} //取出背光灯时间并转换为十进制数}b=1; //模式键是否动作标志。
基于51单片机的1602液晶时钟设计的C程序(闰年补偿,月份调整)
#include<reg52.h>#define uchar unsigned char#define uint unsigned intuchar code table[]=" 2012-02-29 MON";uchar code table1[]=" 23:59:55";uchar num,count,shi,fen,miao,nian,yue,ri,xingqi,s1num,flag; sbit lcden=P2^5;sbit lcdrs=P1^0;sbit lcdrw=P1^1;sbit s1=P3^0;sbit s2=P3^1;sbit s3=P3^2;sbit s4=P3^3;sbit feng=P2^3;/***************延迟函数***************/void delay(uint z){uint x,y;for(x=z;x>0;x--)for(y=110;y>0;y--);}/**********写命令***************/void write_com(uchar com){lcdrs=0;lcdrw=0;P0=com;lcden=1;delay(5);lcden=0;}/**************写数据****************/void write_data(uchar date){lcdrs=1;lcdrw=0;P0=date;lcden=1;delay(5);lcden=0;}/*************时分秒调节函数********************/void write_sfm(uchar add,uchar date){uchar shi,ge;shi=date/10;ge=date%10;write_com(0x80+0x40+add);write_data(0x30+shi);write_data(0x30+ge);}/****************年月日调节函数***************/void write_nyr(uchar ad,uchar dat){uchar shi,ge;shi=dat/10;ge=dat%10;write_com(0x80+0x00+ad);write_data(0x30+shi);write_data(0x30+ge);}/**************************星期显示函数*****************/void display_week(){switch (xingqi){case 1: write_data('M');write_data('O');write_data('N');write_com(0x80+0x00+14);break;case 2: write_data('T');write_data('U');write_data('E');write_com(0x80+0x00+14);break;case 3: write_data('W');write_data('E');write_data('D');write_com(0x80+0x00+14);break;case 4: write_data('T');write_data('H');write_data('U');write_com(0x80+0x00+14);break;case 5: write_data('F');write_data('R');write_data('I');write_com(0x80+0x00+14);break;case 6: write_data('S');write_data('A');write_data('T');write_com(0x80+0x00+14);break;case 7: write_data('S');write_data('U');write_data('N');write_com(0x80+0x00+14);break;}}void keycan(){/****************光标左移***************/if(s1==0){delay(5);if(s1==0){s1num++;while(!s1);if(s1num==1){TR0=0;write_com(0x80+0x40+11);write_data('<');write_com(0x80+0x40+10);//光标重新回到闪烁点，写光标地址同样加一write_com(0x0f); //光标闪烁}if(s1num==2){write_com(0x80+0x40+11);write_data(' ');write_com(0x80+0x40+8);write_data('<');write_com(0x80+0x40+7);}if(s1num==3){write_com(0x80+0x40+8);write_data(':');write_com(0x80+0x40+5);write_data('<');write_com(0x80+0x40+4);}if(s1num==4){write_com(0x80+0x40+5);write_data(':');write_com(0x80+15);write_data('<');write_com(0x80+14);}if(s1num==5){write_com(0x80+15);write_data(' ');write_com(0x80+11);write_data('<');write_com(0x80+10);}if(s1num==6){write_com(0x80+11);write_data(' ');write_com(0x80+8);write_data('<');write_com(0x80+7); }if(s1num==7){write_com(0x80+8);write_data('-');write_com(0x80+5);write_data('<');write_com(0x80+4); }if(s1num==8){s1num=0;write_com(0x80+5);write_data('-');write_com(0x0c);TR0=1;}}}/**************光标右移***************//* if(s2==0){delay(5);if(s2==0){s1num--;while(!s2);if(s1num==1){TR0=0;write_com(0x80+0x40+11);write_data('<');write_com(0x80+0x40+11);//光标重新回到闪烁点，写光标地址同样加一write_com(0x0f); //光标闪烁}if(s1num==2){write_com(0x80+0x40+11);write_data(' ');write_com(0x80+0x40+8);write_data('<');write_com(0x80+0x40+8);}if(s1num==3){write_com(0x80+0x40+8);write_data(':');write_com(0x80+0x40+5);write_data('<');write_com(0x80+0x40+5);}if(s1num==4){write_com(0x80+0x40+5);write_data(':');write_com(0x80+15);write_data('<');write_com(0x80+15);}if(s1num==5){write_com(0x80+15);write_data(' ');write_com(0x80+11);write_data('<');write_com(0x80+11);}if(s1num==6){write_com(0x80+11);write_data(' ');write_com(0x80+8);write_data('<');write_com(0x80+8);}if(s1num==7){write_com(0x80+8);write_data('-');write_com(0x80+5);write_data('<');write_com(0x80+5);}if(s1num==8){s1num=0;write_com(0x80+5);write_data('-');write_com(0x0c);TR0=1;}}} *//***************************按键加*******************************/if(s1num!=0){if(s3==0){delay(5);if(s3==0){while(!s3);if(s1num==1){miao++;if(miao==60)miao=0;write_sfm(9,miao);write_com(0x80+0x40+10);}if(s1num==2){fen++;if(fen==60)fen=0;write_sfm(6,fen);write_com(0x80+0x40+7);}if(s1num==3){shi++;if(shi==24)shi=0;write_sfm(3,shi);write_com(0x80+0x40+4);}if(s1num==4){xingqi++;if(xingqi==8)xingqi=1;write_com(0x80+0x00+12);display_week();}if(s1num==5){ri++;if(ri==32&&(yue==1||yue==3||yue==5||yue==7||yue==8||yue==10||yue==12)){ri=1;yue++;if(yue==13){yue=1;nian++;write_nyr(3,nian);}write_nyr(6,yue);}if(ri==31&&(yue==4||yue==6||yue==9||yue==11)){ri=1;yue++;write_nyr(6,yue);}if(flag==1){if(ri==30&&yue==2){ri=1;yue++;write_nyr(6,yue);}}if(flag==0){if(ri==29&&yue==2){ri=1;yue++;write_nyr(6,yue);}}write_nyr(9,ri);write_com(0x80+0x00+10);}if(s1num==6){yue++;if(yue==2&&ri>29&&flag==1) //当为闰年时，如果ri=30，但是月份已经加到2，这种情况ri必须等于29{ri=29;write_nyr(9,ri);}if(yue==2&&ri>28&&flag==0) //当为平年时，如果ri=30，但是月份已经加到2，这种情况ri必须等于28{ri=28;write_nyr(9,ri);}if((yue==4||yue==6||yue==9||yue==11)&&(ri==31||ri==29||ri==28)){ri=1;write_nyr(9,ri);}if(yue==13){yue=1;nian++;if(nian%4>0){write_nyr(9,28);}write_nyr(3,nian);}write_nyr(6,yue);write_com(0x80+0x00+7);}if(s1num==7){nian++;if(nian==100)nian=0;flag=0;if(nian%4==0)flag=1;write_nyr(3,nian);write_com(0x80+0x00+4);}}}}/***************************按键减*********************/if(s4==0){delay(5);if(s4==0){while(!s4);if(s1num==1){miao--;if(miao==-1)miao=59;write_sfm(9,miao);write_com(0x80+0x40+10);}if(s1num==2){fen--;if(fen==-1)fen=59;write_sfm(6,fen);write_com(0x80+0x40+7);}if(s1num==3){shi--;if(shi==-1)shi=23;write_sfm(3,shi);write_com(0x80+0x40+4);}if(s1num==4){xingqi--;if(xingqi==0)xingqi=7;write_com(0x80+0x00+12);display_week();}if(s1num==5){ri--;if(ri==0&&(yue==1||yue==3||yue==5||yue==7||yue==8||yue==10||yue==12)){ri=30; //防止当yue=12时，当yue减到11时，ri任然等于31时这种不允许情况出现yue--;if(yue==2){if(flag==1)ri=29;elseri=28;}write_nyr(6,yue);if(yue==0){yue=12;ri=31;write_nyr(9,ri);write_nyr(6,yue);}}if(ri==0&&(yue==4||yue==6||yue==9||yue==11)){ri=31;//按下减小按钮，yue 减到3或5或8或10，为大月yue--;write_nyr(6,yue);}if(flag==1) //闰年标志位{if(ri==0&&yue==2){ri=29;yue--;write_nyr(6,yue);}}if(flag==0) //平年标志位{if(ri==0&&yue==2){ri=28;yue--;write_nyr(6,yue);}}write_nyr(9,ri);write_com(0x80+0x00+10);}if(s1num==6){yue--;if(yue==2&&ri>29&&flag==1){ri=29;write_nyr(9,ri);}if(yue==2&&ri>28&&flag==0){ri=28;write_nyr(9,ri);}if(yue==0){yue=12;nian--;write_nyr(3,nian);}write_nyr(6,yue);if((yue==4||yue==6||yue==9||yue==11)&&(ri==31||ri==29||ri==28)){ri=1;write_nyr(9,ri);}write_com(0x80+0x00+7);}if(s1num==7){nian--;if(nian==-1)nian=99;flag=0; //清除标志位if(nian%4==0)flag=1;write_nyr(3,nian);write_com(0x80+0x00+4);}}}}/************初始化**************/void init(){write_com(0x38);write_com(0x0c);write_com(0x06);write_com(0x01);write_com(0x80+0x00);for(num=0;num<15;num++){write_data(table[num]);delay(5);}write_com(0x80+0x40);for(num=0;num<11;num++){write_data(table1[num]);delay(5);}shi=23;fen=59;miao=55;xingqi=1;ri=29;yue=2;nian=12;if(nian%4==0)flag=1;TMOD=0x01;TH0=(65536-50000)/256;TL0=(65536-50000)%256;EA=1;ET0=1;TR0=1;}/***********主函数*************/ void main(){init(); //初始化while(1){keycan();}}/******启动定时器*************/void timer() interrupt 1{TH0=(65536-50000)/256;TL0=(65536-50000)%256;count++;if(count==18){count=0;miao++;if(miao==60){miao=0;fen++;if(fen==60){fen=0;feng=0;delay(500);feng=1;shi++;if(shi==24){shi=0;ri++;xingqi++;if(xingqi==8)xingqi=1;write_com(0x80+0x00+12);display_week();if(ri==32&&(yue==1||yue==3||yue==5||yue==7||yue==8||yue==10||yue==12)){ri=1;yue++;if(yue==13){yue=1;nian++;if(nian==99)nian=0;if(nian%4==0)flag=1;flag=0;write_nyr(3,nian);}write_nyr(6,yue);}if(ri==31&&(yue==4||yue==6||yue==9||yue==11)){ri=1;yue++;write_nyr(6,yue);}if(flag==1){if(ri==30&&yue==2){ri=1;yue++;write_nyr(6,yue);}}if(flag==0){if(ri==29&&yue==2).专业整理..学习帮手.{ri=1;yue++;write_nyr(6,yue);}}write_nyr(9,ri);}write_sfm(3,shi);}write_sfm(6,fen);}write_sfm(9,miao);}}。
单片机小项目——基于51单片机的温度报警器
单⽚机⼩项⽬——基于51单⽚机的温度报警器单⽚机⼩项⽬介绍项⽬功能介绍编程语⾔：C语⾔。
开发环境：keil。
主要功能：1602屏显⽰时间和温度，当温度超过预定值时蜂鸣器⼯作报警。
此项⽬只是作为单⽚机初学者的⼀个⼩测验。
硬件资源分配1602屏——P0，P2^7，P2^5，P2^6。
串⼝——P2^0，P2^1。
传感器——DS18B20 P3^7；DS1302 P3^4，P3^5，P3^6。
蜂鸣器——P1^6。
LCD1602屏配置在h⽂件中声明端⼝和函数：#ifndef __LCD1602_H_#define __LCD1602_H_#include<reg52.h>//重定义关键字#ifndef uchar#define uchar unsigned char#endif#ifndef uint#define uint unsigned int#endif//定义端⼝#define LCD1602_DATAPINS P0sbit LCD1602_E=P2^7;sbit LCD1602_RW=P2^5;sbit LCD1602_RS=P2^6;//函数声明void Lcd1602_Delay1ms(uint c); //延时函数void LcdWriteCom(uchar com); //写⼊命令void LcdWriteData(uchar dat); //写⼊数据void LcdInit(); //LCD初始化⼦程序#endif在LCD1602.c⽂件中写⼊时序和命令等函数代码：#include "LCD1602.h"/***************************延时函数**************************/void Lcd1602_Delay1ms(uint c) //误差 0us{uchar a,b;for (; c>0; c--){for (b=199;b>0;b--){for(a=1;a>0;a--);}}}/***************************底层函数**************************/void LcdWriteCom(uchar com) //写⼊命令{LCD1602_E = 0; //使能LCD1602_RS = 0; //选择发送命令LCD1602_RW = 0; //选择写⼊LCD1602_DATAPINS = com; //放⼊命令Lcd1602_Delay1ms(1); //等待数据稳定LCD1602_E = 1; //写⼊时序Lcd1602_Delay1ms(5); //保持时间LCD1602_E = 0;}void LcdWriteData(uchar dat) //写⼊数据{LCD1602_E = 0; //使能清零LCD1602_RS = 1; //选择输⼊数据LCD1602_RW = 0; //选择写⼊LCD1602_DATAPINS = dat; //写⼊数据Lcd1602_Delay1ms(1);LCD1602_E = 1; //写⼊时序Lcd1602_Delay1ms(5); //保持时间LCD1602_E = 0;}void LcdInit() //LCD初始化⼦程序{LcdWriteCom(0x38); //开显⽰LcdWriteCom(0x0c); //开显⽰不显⽰光标LcdWriteCom(0x06); //写⼀个指针加1LcdWriteCom(0x01); //清屏LcdWriteCom(0x80); //设置数据指针起点}在main.c⽂件中运⽤：（这⾥先让显⽰屏显⽰⾃定义的内容，稍后再做更改）#include "reg52.h"#include "LCD1602.h"unsigned char Disp[]=" Pechin Science ";void main(){unsigned char i=0;LcdInit();for(i=0;i<16;i++){LcdWriteData(Disp[i]);}while(1){}}DS18B20温度传感器配置（并将其与LCD协同使⽤）在DS18B20.c⽂件中写⼊相关函数：1 #include "DS18B20.h"234/***************************延时函数**************************/5void Delay1ms(unsigned int y)6 {7 unsigned int x;8for( ; y>0; y--)9 {10for(x=110; x>0; x--);11 }12 }131415/***************************底层函数**************************/1617 unsigned char Ds18b20Init() //初始化函数18 {19 unsigned char i;20 DSPORT = 0; //将总线拉低480us~960us21 i = 70;22while(i--); //延时642us23 DSPORT = 1; //然后拉⾼总线，如果DS18B20做出反应会将在15us~60us后总线拉低25while(DSPORT) //等待DS18B20拉低总线26 {27 Delay1ms(1);28 i++;29if(i>5) //等待>5MS30 {31return0; //初始化失败32 }3334 }35return1; //初始化成功36 }373839void Ds18b20WriteByte(unsigned char dat) //写⼊⼀个字节40 {41 unsigned int i, j;4243for(j=0; j<8; j++)44 {45 DSPORT = 0; //每写⼊⼀位数据之前先把总线拉低1us46 i++;47 DSPORT = dat & 0x01; //然后写⼊⼀个数据，从最低位开始48 i=6;49while(i--); //延时68us，持续时间最少60us50 DSPORT = 1; //然后释放总线，⾄少1us给总线恢复时间才能接着写⼊第⼆个数值51 dat >>= 1;52 }53 }545556 unsigned char Ds18b20ReadByte() //读取⼀个字节57 {58 unsigned char byte, bi;59 unsigned int i, j;60for(j=8; j>0; j--)61 {62 DSPORT = 0; //先将总线拉低1us63 i++;64 DSPORT = 1; //然后释放总线65 i++;66 i++; //延时6us等待数据稳定67 bi = DSPORT; //读取数据，从最低位开始读取68/*将byte左移⼀位，然后与上右移7位后的bi，注意移动之后移掉那位补0。
单片机用C51实现时间、星期、年月、温度在DS1602上显示的多功能数字钟
//***************************************************************************** //******用DS1602实现可调日期，时间，星期及温度实时监测的实用数字钟功能******* //*****************创建日期:2010-1-7***********************//功能介绍:用3*3按键在DS1602上显示第一排显示"2010-01-05 MON"第二排显示"23：59：00"//*******************功能介绍**************************************//********* K6:adjtime K3:hour K2:minute K1:OK*******************//********* K3:adjalarm K3:hh K1:OK**********************//********* K2:lookalarm K1:OK **********************//********* K1:alarm ON/OFF ***********************//********* K5:adjdate （K9:month）K8:day （K7:week）K4:OK*********//***********************************************************************#include "main.h"void lcd_data(unsigned char dat);//DS1602数据写入unsigned char kbscan();//按键扫描void ds1602();//DS1602初始化void lcd_com(unsigned char com);//DS1602命令写入void timer0();//用于延时的定时中断初始2mSvoid disp();//主程序的显示调用void display();//正常的显示void display_alarm();//查看闹铃void alarm();//闹铃void process();//按键的处理unsigned char hands();//与18B20通信握手void write_temp_date(unsigned char dat);//写温度数据18B20unsigned char read_temp_date();//读温度数据18B20void tmpdelay(unsigned char tmp);//ds18b20对时序要求严格unsigned char result();//计算月份的天数//*******************************//DS1602命令的写入//*******************************void lcd_com(unsigned char com){rs=0;rw=0;P0=com;dema=1;while(dema!=0);en=1;dema=1;while(dema!=0);en=0;}//*********************//DS1602数据的写入//*********************void lcd_data(unsigned char dat){rs=1;rw=0;P0=dat;dema=1;while(dema!=0);en=1;dema=1;while(dema!=0);en=0;}//***************************//3*3按键的扫描//***************************unsigned char kbscan(){unsigned char sccode,recode,tenp;P1=0XF8;tenp=P1;if(tenp!=0xf8){demb=3;while(demb!=0);if(tenp==P1){sccode=0xfe;while((sccode&0xf7)!=0){P1=sccode;if((P1&0xf8)!=0xf8){recode=P1&0Xf8;sccode=sccode&0xc7;return(recode|sccode);}elsesccode=sccode<<1|0x01;}}}return(0);}//**************************//*********每月的天数计算***//**************************unsigned char result(){switch(month){case 1:return 31;break;case 3:return 31;break;case 5:return 31;break;case 7:return 31;break;case 8:return 31;break;case 10:return 31;break;case 12:return 31;break;case 4:return 30;break;case 6:return 30;break;case 9:return 30;break;case 11:return 30;break;case 2:if(year%4==0){return 29;//闰年29天}else{return 28;//平年28天}}}//**************************//*********DS1602的初始化***//**************************void ds1602(){lcd_com(0x38);//16*2显示5*7矩阵dema=1;while(dema!=0);lcd_com(0x0c);//显示开,无光标无闪烁dema=1;while(dema!=0);lcd_com(0x06);//指针+1,整屏不动dema=1;while(dema!=0);lcd_com(0x01);//清屏}//*******************************//定时中断延时的初始化以及中断***//*******************************void timer0(){TMOD=0X01;TH0=0Xf8;TL0=0X30; //2mS初值12M晶振TR0=1;ET0=1;EA=1;}TIME0() interrupt 1{TR0=0;TH0=0Xf8;TL0=0X30; //2mS初值TR0=1;count++;if(count>=500)//1s{count=0;second++;if(second>=60)//1m{second=0;minute++;if(minute>=60)//1h{minute=0;hour++;if(hour>=24)//1day{hour=0;flag_week++;//星期调整if(flag_week>8){flag_week=1;}day++;if(day>(days=result()))//1month{day=1;month++;if(month>12)//1year{month=1;year++;if(year>100){year=0;}}}}}}}if(dema)dema--;//写命令的延时if(demb)demb--;//按键的延时//************闹铃**********if(demc){demc--;}if(demd){demd--;}flag++;if(flag>=200){flag=0;temp=1;deme++;if(deme>=2){demc=0;temp=0;}}}//**************************//正常日期时间显示//**************************void display(){a=hour/10;b=hour%10;c=minute/10;d=minute%10;e=second/10;f=second%10;m3=year/10;m4=year%10;m6=month/10;m7=month%10;m9=day/10;m10=day%10;//*****第一排显示**********lcd_com(0x81);//第一排从第2个位置开始显示lcd_data(0x32);lcd_com(0x82);lcd_data(0x30);lcd_com(0x83);lcd_data(0x30+m3);lcd_com(0x84);lcd_data(0x30+m4);lcd_com(0x85);lcd_data(0x2d);//"-"lcd_com(0x86);lcd_data(0x30+m6);lcd_com(0x87);lcd_data(0x30+m7);lcd_com(0x88);lcd_data(0x2d);//"-"lcd_com(0x89);lcd_data(0x30+m9);lcd_com(0x8a);lcd_data(0x30+m10);if(flag_week==1)//周1{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week1[n]);}}else if(flag_week==2)//周2 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week2[n]);}}else if(flag_week==3)//周3 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week3[n]);}}else if(flag_week==4)//周4 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week4[n]);}}else if(flag_week==5)//周5 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week5[n]);}}else if(flag_week==6)//周6 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week6[n]);}}else if(flag_week==7)//周7{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week7[n]);}}//*****第二排显示***********lcd_com(0xc1);//第二排从第3个位置开始显示lcd_data(0x30+a);lcd_com(0xc2);lcd_data(0x30+b);lcd_com(0xc3);lcd_data(0x3a);//":"lcd_com(0xc4);lcd_data(0x30+c);lcd_com(0xc5);lcd_data(0x30+d);lcd_com(0xc6);lcd_data(0x3a);//":"lcd_com(0xc7);lcd_data(0x30+e);lcd_com(0xc8);lcd_data(0x30+f);lcd_com(0xca);lcd_data(0x47);//"G"lcd_com(0xcb);lcd_data(0x47);//"G"lcd_com(0xcd);all_date=all_date%100;lcd_data(match[all_date/10]);//十位lcd_com(0xce);lcd_data(match[all_date%10]);//个位lcd_com(0xcf);lcd_data('C');//"temperapure" "C"}//********************************************** //*************************看闹钟*************** void display_alarm(){a=hh/10;b=hh%10;c=min/10;d=min%10;e=sec/10;f=sec%10;m3=year/10;m4=year%10;m6=month/10;m7=month%10;m9=day/10;m10=day%10;//*****第一排显示**********lcd_com(0x81);//第一排从第2个位置开始显示lcd_data(0x32);lcd_com(0x82);lcd_data(0x30);lcd_com(0x83);lcd_data(0x30+m3);lcd_com(0x84);lcd_data(0x30+m4);lcd_com(0x85);lcd_data(0x2d);//"-"lcd_com(0x86);lcd_data(0x30+m6);lcd_com(0x87);lcd_data(0x30+m7);lcd_com(0x88);lcd_data(0x2d);//"-"lcd_com(0x89);lcd_data(0x30+m9);lcd_com(0x8a);lcd_data(0x30+m10);if(flag_week==1)//周1{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week1[n]);}}else if(flag_week==2)//周2{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week2[n]);}}else if(flag_week==3)//周3 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week3[n]);}}else if(flag_week==4)//周4 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week4[n]);}}else if(flag_week==5)//周5 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week5[n]);}}else if(flag_week==6)//周6 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week6[n]);}}else if(flag_week==7)//周7 {lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week7[n]);}}//****第二排**************lcd_com(0xc1);//第二排从第3个位置开始显示lcd_data(0x30+a);lcd_com(0xc2);lcd_data(0x30+b);lcd_com(0xc3);lcd_data(0x3a);//":"lcd_com(0xc4);lcd_data(0x30+c);lcd_com(0xc5);lcd_data(0x30+d);lcd_com(0xc6);lcd_data(0x3a);//":"lcd_com(0xc7);lcd_data(0x30+e);lcd_com(0xc8);lcd_data(0x30+f);lcd_com(0xcd);all_date=all_date%100;lcd_data(match[all_date/10]);//十位lcd_com(0xce);lcd_data(match[all_date%10]);//个位lcd_com(0xcf);lcd_data('C');//"temperapure" "C"}//**********************//闹钟开的显示**********//**********************void display_onalarm(){a=hour/10;b=hour%10;c=minute/10;d=minute%10;e=second/10;f=second%10;m3=year/10;m4=year%10;m6=month/10;m7=month%10;m9=day/10;m10=day%10;//*****第一排显示**********lcd_com(0x81);//第一排从第2个位置开始显示lcd_data(0x32);lcd_com(0x82);lcd_data(0x30);lcd_com(0x83);lcd_data(0x30+m3);lcd_com(0x84);lcd_data(0x30+m4);lcd_com(0x85);lcd_data(0x2d);//"-"lcd_com(0x86);lcd_data(0x30+m6);lcd_com(0x87);lcd_data(0x30+m7);lcd_com(0x88);lcd_data(0x2d);//"-"lcd_com(0x89);lcd_data(0x30+m9);lcd_com(0x8a);lcd_data(0x30+m10);if(flag_week==1)//周1{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week1[n]);}}else if(flag_week==2)//周2{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week2[n]);}}else if(flag_week==3)//周3{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week3[n]);}}else if(flag_week==4)//周4{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week4[n]);}}else if(flag_week==5)//周5{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week5[n]);}}else if(flag_week==6)//周6{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week6[n]);}}else if(flag_week==7)//周7{lcd_com(0x8c);for(n=0;n<3;n++){lcd_data(week7[n]);}}//****第二排**************lcd_com(0xc1);//第二排从第3个位置开始显示lcd_data(0x30+a);lcd_com(0xc2);lcd_data(0x30+b);lcd_com(0xc3);lcd_data(0x3a);//":"lcd_com(0xc4);lcd_data(0x30+c);lcd_com(0xc5);lcd_data(0x30+d);lcd_com(0xc6);lcd_data(0x3a);//":"lcd_com(0xc7);lcd_data(0x30+e);lcd_com(0xc8);lcd_data(0x30+f);lcd_com(0xca);lcd_data(0x4B);//"K"lcd_com(0xcb);lcd_data(0x4B);//"K"lcd_com(0xcd);all_date=all_date%100;lcd_data(match[all_date/10]);//十位lcd_com(0xce);lcd_data(match[all_date%10]);//个位lcd_com(0xcf);lcd_data('C');//"temperapure" "C" }//*****************************//*******按键的处理************//***************************** void process(){if(key!=0){if(key==K6){display();while((key=kbscan())!=K1){display();if((key=kbscan())==K3){hour++;if(hour>=24){hour=0;}}if((key=kbscan())==K2){minute++;if(minute>=60){minute=0;}}}}else if(key==K2)//看闹铃{while(((key=kbscan())!=K1)){display_alarm();}}else if(key==K3)//调闹铃{display_alarm();while((key=kbscan())!=K1){display_alarm();if((key=kbscan())==K3){hh++;if(hh>=24){hh=0;}}if((key=kbscan())==K2){min++;if(min>=60){min=0;}}}}else if(key==K1)//开/关闹钟{flag_alarm=~flag_alarm; }else if(key==K5)//调日期星期{display();while((key=kbscan())!=K4)//ok{display();// if((key=kbscan())==K9)//month // {// month++;// if(month>12)// {// month=1;// }// }if((key=kbscan())==K8)//day{day++;flag_week++;if(flag_week>7){flag_week=1;}if(day>(days=result())){day=1;month++;if(month>12){month=1;year++;if(year>100){year=0;}}}// if((key=kbscan())==K7)//week // {// flag_week++;// if(flag_week>8)// {// flag_week=1;// }// }}}}}}//*************************************//*****************闹铃****************//*************************************void alarm(){if(flag_offalarm==1){if(flag_alarm==1){if(temp){TR0=0;TH0=0Xf8;TL0=0X30;TR0=1; //重装初值2mSdemd=2;while(demd!=0);//P37=~P37;}else{TR0=0;TH0=0XF8;TL0=0X30;TR0=1; //重装初值demc=1;while(demc!=0);//P37=~P37;}}else{P37=1;flag_offalarm=0;}}elseif((flag_alarm==1)&&(minute==min)&&(hour==hh)) {flag_offalarm=1;if(temp){TR0=0;TH0=0Xf8;TL0=0X30;TR0=1; //重装初值2mSdemd=2;while(demd!=0);//P37=~P37;}else{TR0=0;TH0=0XF8;TL0=0X30;TR0=1; //重装初值demc=1;while(demc!=0);//P37=~P37;}}}//**********************************//***********DS18B20时序控制*********** //**********************************void tmpdelay(unsigned char tmp)//注意！！{while(tmp>0){tmp--;}}//*tmdelay(1) ;//16.28us//增加一个就加6.5us // tmdelay(2) ;//22.78us// tmdelay(3) ;//29.30us// tmdelay(4) ;//35.81us// tmdelay(70) ;//465.49// tmdelay(74) ;//491.54// tmdelay(80) ;//530.60// tmdelay(115) ;//150us *//*例如16.28+(?*6.5)=490*///********************************//**************************************//**********DS18B20读取温度***********//*************************************unsigned char read_temp_date()//读温度数据18B20{unsigned char i;unsigned int y=0;value=0;for(i=8;i>0;i--){value>>=1;DQ=0;// tmpdelay(1);//>15usy++;y++;y++;y++;//1-15usDQ=1;// tmpdelay(1);//读温度对时序要求严格不能用tmpdelay(1)代替y++;if(DQ==1){value=value|0x80;}else{}tmpdelay(16);//120US}return (value);}//**************************************//**********DS18B20写指令温度***********//*************************************void write_temp_date(unsigned char dat)//写温度指令18B20{unsigned char i;for(i=8;i>0;i--){DQ=0;tmpdelay(1);//>15usif((dat&0x01)==1){DQ=1;tmpdelay(16);//120us}else{DQ=0;tmpdelay(16);//120usDQ=1;tmpdelay(1);//>15us}dat=dat>>1;}DQ=1;tmpdelay(1);//>15us}//**************************************//**********DS18B20复位*****************//*************************************unsigned char hands()//握手复位{temp=0;// noanswer:do{DQ=0;tmpdelay(72);//490uSDQ=1;tmpdelay(11);/*>60uS 注意：此处把函数名改为hans()后，这里两处的tmpdelay()括号内最好改成74和12*/}while(DQ!=0);temp=1;tmpdelay(35);//>240usDQ=1;return(temp);//此处可以采用两种方式表达，1用直到...才；2用goto转向// if(DQ==1)// {// goto noanswer;// }// else if(DQ==0)// {// temp=1;// tmpdelay(40);//>250uS// DQ=1;// }// return(temp);}void disp(){if(flag_alarm){display_onalarm();}else{display();}}//***********************//*******主程序**********//***********************main(void){timer0();//中断延时初始化ds1602();//初始化while(1){key=kbscan();//调用按键process();//按键处理alarm();//闹零if(hands()==1){write_temp_date(0xcc);//跳过write_temp_date(0x44);//温度转换tmpdelay(75);//500us// dema=250;// while(dema!=0);//500ms}if(hands()==1){write_temp_date(0xcc);//跳过write_temp_date(0xbe);//读取温度数据tmpdelay(75);//500us// dema=250;// while(dema!=0);//500ms}date_l=read_temp_date();//读取低位温度date_h=read_temp_date();//读取高位温度all_date=((date_h<<4)|(date_l>>4));// 整数位// dot_date=date_l&0x0f;// dot_date=dot_date*625;//小数位// all_date=all_date+dot_date/10000;disp();//显示}}。
1602液晶显示温度C程序
功 能：写入将要执行操作的命令
说 明：
入口参数：cmd
返 回 值：无
设 计： 日 期：2009-8-17
***********************************************************************/
bit signal; //温度符号标志位
sbit L1=P1^4; //芯片存在P1.0置0点亮LED灯
sbit L2=P1^5; //芯片不存在P1.1置0点亮LED灯
uchar buf[3] ; //存储转换后温度的高8位与低8位
r_data(); //读暂存器中温度变化的结果
}
}
/********************************************************************
函 数 名：二-十进制转换子函数Conversion
功 能：将二进制数转入十进制中
void delay(uchar i)
{
while(--i);
}
/********************************************************************
函 数 名：初始化子函数 reset_signal
功 能：信号复位进行初始化
说 明：
入口参数：
返 回 值：无
设 计： 日 期：2009-8-17
***********************************************************************/
reset_signal()
51单片机c语言编写的1602液晶显示闹钟
#include<reg52.h>#define uchar unsigned char#define uint unsigned intuchar code table[]=" 2012-08-17 MON"; //设定开始显示的时间uchar code table1[]=" 12:30:00";uchar code table2[7][3]= {{"MON"},{"TUE"},{"WED"},{"THU"},{"FRI"},{"SAT"},{"SUN"}};//定义二维字符数组sbit wr=P3^6; // 1602液晶的读/写端sbit dula=P2^6; // 数码管段选sbit wela=P2^7; // 数码管位选sbit lcden=P3^4; // 1602液晶使能端sbit lcdrs=P3^5; // 1602液晶命令/数据端sbit key1=P3^0; // 声明s4按键sbit key2=P3^1; // 声明s8按键sbit key3=P3^2; // 声明s12按键sbit key4=P3^3; // 声明s16按键sbit beep=P2^3; // 声明蜂鸣器sbit rd=P3^7; // 声明4个按键的公共端uchar num1,shi=12,fen=30,miao,yue=8,ri=17,shi1,fen1,miao1,keynum1,week; //定义时分秒变量uint nian=2012; //定义年变量void delayms(uint x){uint i,j;for(i=x;i>0;i--) //定义带参数延时函数for(j=110;j>0;j--);}void write_com(uchar com) //1602液晶写指令函数{ wr=0;lcdrs=0;P0=com;delayms(1);lcden=1;delayms(1);lcden=0;}void write_date(uchar date) //1602液晶写数据函数{ wr=0;lcdrs=1;P0=date;delayms(1);lcden=1;delayms(1);lcden=0;}void write_addate1(uchar add,uint date) //定义显示年的函数{ uint qian;uchar bai,shi,ge;qian=date/1000;bai=date%1000/100;shi=date%1000%100/10;ge=date%10;write_com(add+0x80);write_date(0x30+qian);write_date(0x30+bai);write_date(0x30+shi);write_date(0x30+ge);}void write_addate2(uchar add,uchar date) //定义显示月、日、时、分、秒函数{uchar shi,ge;shi=date/10;ge=date%10;write_com(add+0x80);write_date(0x30+shi);write_date(0x30+ge);}void write_rq(uchar i) //定义显示星期的函数{ uchar x;for(x=0;x<3;x++){ write_date(table2[i][x]);delayms(1);}}void init () //定义初始化函数{dula=0; // 关闭数码管段、位选端wela=0;TMOD=0x01; // 定时器0工作方式为16位TH0=(65536-45872)/256; // 装初值TL0=(65536-45872)%256;EA=1; // 开总中断ET0=1; // 开定时器0中断write_com(0x38); // 设置16*2显示，5*7点阵，8位数据口write_com(0x06); // 写一个字符后地址指针加1write_com(0x0c); // 设置开显示，不显示光标write_com(0x01); // 显示清0，数据清0write_com(0x80); // 使指针指向第1行第1列}void keyscan() // 定义按键函数{uchar keynum;rd=0; //4个按键公共端为低电平if(key1==0) //s4按键被按下{ delayms(3); //去抖延时if(key1==0) //确认s4按键被按下，进入调时间模式{keynum++;while(!key1); //松手检测}if(keynum==1) //s4按下一次{ TR0=0; //关闭定时器0write_com(0x81); //指针指向第1行2列write_com(0x0f); //开启光标显示，光标闪烁}if(keynum==2){write_com(0x86); //光标跳到月份}if(keynum==3){write_com(0x89); //光标跳到日}if(keynum==4){write_com(0x8c); //光标跳到星期}if(keynum==5){write_com(0xc4); //光标跳到时}if(keynum==6){write_com(0xc7); //光标跳到分}if(keynum==7){write_com(0xca); //光标跳到秒}if(keynum==8){ keynum=0; //退出调时间模式TR0=1; //开启定时器0write_com(0x0c); //关闭光标显示}}if(keynum) //当进入调时间模式时{if(key2==0) //s8按键按下{delayms(3); //去抖延时if(key2==0){if(keynum==1){nian++; //s8每按下一次年份加1if(nian==10000) // 加满清0nian=0;write_addate1(1,nian); // 显示年份write_com(0x81); //写完数据指针指向年份原来位置}if(keynum==2){yue++; //s8每按下一次月份加1if(yue==13)yue=0; //加满清0write_addate2(6,yue); //显示月份write_com(0x86); //写完数据指针指向月份原来位置}if(keynum==3){ ri++;if(yue==1||yue==3||yue==5||yue==7||yue==8||yue==10||yue==12) //1,3,5,7,8,10,12月有31天if(ri==32)//加满还原ri=1;if(yue==4||yue==6||yue==9||yue==11) //4,6,9,11月有30天if(ri==31)ri=1;if(yue==2&&((nian%4==0&&nian%100!=0)||nian%400==0)) //闰年2月有30天if(ri==30)ri=1;if(yue==2&&(nian%4!=0)||(nian%100==0&&nian%400!=0)) //非闰年2月有31天if(ri==29)ri=1;write_addate2(9,ri); //显示日write_com(0x89); //写完数据指针指向日原来位置}if(keynum==4){week++;//s8每按下一次星期加1if(week==7)//加满还原week=0;write_rq(week); //显示星期write_com(0x8c); //写完数据指针指向星期原来位置}if(keynum==5){shi++;//s8每按下一次时加1if(shi==24)shi=0;//加满还原write_addate2(0x44,shi); //显示时write_com(0xc4); //写完数据指针指向时原来位置}if(keynum==6){fen++;//s8每按下一次分加1if(fen==60)fen=0;//加满还原write_addate2(0x47,fen); //显示分write_com(0xc7);//写完数据指针指向分原来位置}if(keynum==7){miao++;//s8每按下一次秒加1if(miao==60)miao=0;//加满还原write_addate2(0x4a,miao);//显示秒write_com(0xca);//写完数据指针指向秒原来位置}while(!key2); //松手检测}}if(key3==0){delayms(3);if(key3==0){ //s12按下时减1if(keynum==1){nian--;if(nian==-1)nian=9999;write_addate1(1,nian);write_com(0x81);}if(keynum==2){ yue--;if(yue==-1)yue=12;write_addate2(6,yue);write_com(0x86);}if(keynum==3){ri--;if(ri==0){if(yue==1||yue==3||yue==5||yue==7||yue==8||yue==10||yue==12)ri=31;if(yue==4||yue==6||yue==9||yue==11)ri=30;if(yue==2&&((nian%4==0&&nian%100!=0)||nian%400==0))ri=29;if(yue==2&&(nian%4!=0)||(nian%100==0&&nian%400!=0))ri=28;}write_addate2(9,ri);write_com(0x89);}if(keynum==4){week--;if(week==-1)week=6;write_rq(week);write_com(0x8c);}if(keynum==5){shi--;if(shi==-1)shi=23;write_addate2(0x44,shi);write_com(0xc4);}if(keynum==6){fen--;if(fen==-1)fen=59;write_addate2(0x47,fen);write_com(0xc7);}if(keynum==7){miao--;if(miao==-1)miao=59;write_addate2(0x4a,miao);write_com(0xca);}while(!key3); //松手检测}}}if(key4==0) //s16被按下进入调闹钟模式{ delayms(3);if(key4==0){keynum1++;while(!key4);}if(keynum1==1){ write_com(0x01); //清屏，指针清0write_com(0xc6); //在时分之间显示“：”write_date(':');write_com(0xc9); //在分秒之间显示“：”write_date(':');write_com(0x0f); //开启光标write_com(0xc4); //光标指向时}if(keynum1==2){write_com(0xc7);//光标指向分}if(keynum1==3){write_com(0xca); //光标指向秒}if(keynum1==4){ keynum1=0;write_com(0x0c); //关闭光标}}if(keynum1){if(key2==0) //s8按下加1{delayms(3);if(key2==0){if(keynum1==1){shi1++;if(shi1==24)shi1=0;write_addate2(0x44,shi1);write_com(0xc4);}if(keynum1==2){fen1++;if(fen1==60)fen1=0;write_addate2(0x47,fen1);write_com(0xc7);}if(keynum1==3){miao1++;if(miao1==60)miao1=0;write_addate2(0x4a,miao1);write_com(0xca);}while(!key2);}}if(key3==0) //s12每按一次减1{delayms(3);if(key3==0){if(keynum1==1){shi1--;if(shi1==-1)shi1=23;write_addate2(0x44,shi1);write_com(0xc4);}if(keynum1==2){fen1--;if(fen1==-1)fen1=59;write_addate2(0x47,fen1);write_com(0xc7);}if(keynum1==3){miao1--;if(miao1==-1)miao1=59;write_addate2(0x4a,miao1);write_com(0xca);}while(!key3);//松手检测}}}}void main(){ uchar num;init();for(num=0;num<15;num++){ write_date(table[num]);delayms(5);} //显示初始时间write_com(0xc0);for(num=0;num<12;num++){ write_date(table1[num]);delayms(5);}TR0=1; //开启定时器0while(1){ if(shi==shi1&&fen==fen1&&miao==miao1) //闹钟到了蜂鸣器响beep=0;keyscan(); //扫描键盘}}void time() interrupt 1 //中断函数{TH0=(65536-45872)/256;TL0=(65536-45872)%256; //进入中断装初值num1++;if(num1==20) //一秒到了{ num1=0; //清0miao++;if(miao==60) //一分到了{ miao=0; fen++; }if(!keynum1) write_addate2(0x4a,miao); //当调闹钟模式按下时不显示当前时间if(fen==60){ fen=0;shi++;}if(!keynum1) write_addate2(0x47,fen); //当调闹钟模式按下时不显示当前时间if(shi==24){shi=0;ri++;week++;}if(!keynum1) write_addate2(0x44,shi); //当调闹钟模式按下时不显示当前时间if(yue==1||yue==3||yue==5||yue==7||yue==8||yue==10||yue==12)if(ri==32){ ri=1; y ue++; }if(yue==4||yue==6||yue==9||yue==11)if(ri==31){ ri=1; yue++; }if(yue==2&&((nian%4==0&&nian%100!=0)||nian%400==0))if(ri==30){ ri=1; yue++; }if(yue==2&&(nian%4!=0)||(nian%100==0&&nian%400!=0))if(ri==29){ ri=1; yue++; }if(!keynum1) write_addate2(9,ri);//当调闹钟模式按下时不显示当前时间if(week==7)week=0;if(!keynum1)//当调闹钟模式按下时不显示当前时间{ write_com(0x8c);write_rq(week);}if(yue==13){ yue=0;nian++;}if(!keynum1)//当调闹钟模式按下时不显示当前时间{write_addate2(6,yue);write_com(0x88);write_date('-');}if(nian==10000)nian=0;if(!keynum1){ write_addate1(1,nian);//当调闹钟模式按下时不显示当前时间write_com(0x85);write_date('-');}}}。
基于c51功能最全的电子钟程序(lcd1602)
功能最全的电子钟【单片机】c51数字时钟（带年月日显示）摘要：本设计以单片机为核心，lcd1602显示。
采用独立键盘输入能任意修改当前时间日期和设定闹钟时间。
具有显示年月日（区分闰年和二月），闹钟报警和整点报时功能主程序：/********************************************************************************************************************************************************************************* ****************************************** lcd1602电子钟********************************************************************************************************************************** *************************************************************************************************** ********************/# include <reg52.h># include "lcd16024.h"sbit key1 = P2^0; //调整sbit key2 = P2^1; //加1sbit key3 = P2^2; //减1sbit speaker = P2^3; //蜂鸣器sbit key4 = P2^4; //闹钟设计bit cal_year = 1; //进入判断闰年标志位bit leap_year; //闰年标志位bit calculate = 0; //日加一标记bit run = 0; //闹钟标志bit beep = 0; //整点报时标志//uint8 num = 0; //调整是给的脉冲uint8 code str1[] = "D: ";uint8 code str2[] = "T: ";uint8 code str3[] = "Wek";uint8 daystr[]="2013-07-29 "; //年月日格式uint8 timestr[]="21:30:59 N"; //时分秒格式uint8 daystr1[]="2013-07-29 "; //闹钟年月日格式uint8 timestr1[]="21:30:59 N"; //闹钟时分秒格式uint8 numweek = 0; //星期加1标记char week = 1; //星期char sec = 53; //秒char min = 50; //分char hour = 23; //时uint8 day = 30; // 日uint8 month = 9; //月uint16 year = 2013; //年char week1 = 1; //闹钟星期char sec1 = 58; //闹钟秒char min1 = 50; //闹钟分char hour1 = 23; //闹钟时uint8 day1 = 30; //闹钟日uint8 month1 = 9; //闹钟月uint16 year1 = 2013; //闹钟年uint8 WeekData1; //闹钟星期标记uint8 number = 0; //定时uint8 WeekData; //星期标记uint8 speaker_num; //整点报时次数uint8 scan_key(void); //函数声名/****************************************************************************** ***************************** 更新LCD时间分离读取******************************************************************************************************************* *******/void TimeChange(){//时分秒timestr[7] = sec%10+'0';timestr[6] = sec/10+'0';timestr[4] = min%10+'0';timestr[3] = min/10+'0';timestr[1] = hour%10+'0';timestr[0] = hour/10+'0';//年月日daystr[9] = day%10+'0';daystr[8] = day/10+'0';daystr[6] = month%10+'0';daystr[5] = month/10+'0';daystr[3] = year%10+'0';daystr[2] = year/10%10+'0';daystr[1] = year/100%10+'0';daystr[0] = year/1000+'0';//星期WeekData = week+'0';}/****************************************************************************** ***************************** 闹钟更新LCD时间分离读取******************************************************************************************************************* *******/void TimeChange1(){//时分秒timestr1[7] = sec1%10+'0';timestr1[6] = sec1/10+'0';timestr1[4] = min1%10+'0';timestr1[3] = min1/10+'0';timestr1[1] = hour1%10+'0';timestr1[0] = hour1/10+'0';//年月日daystr1[9] = day1%10+'0';daystr1[8] = day1/10+'0';daystr1[6] = month1%10+'0';daystr1[5] = month1/10+'0';daystr1[3] = year1%10+'0';daystr1[2] = year1/10%10+'0';daystr1[1] = year1/100%10+'0';daystr1[0] = year1/1000+'0';//星期WeekData1 = week1+'0';}/****************************************************************************** ***************************** 初始化系统定时器0 ******************************************************************************************************************* *******/void systimer0_init(void){TMOD |=0x01;//设置为1时用或（|）TMOD &=0xfd;//设置为0时用与（&）TH0 = 0xDC; // 定时10msTL0 = 0x00;EA = 1;ET0=1;TR0=1;EX0 = 1;}/****************************************************************************** ***************************** 闹钟时间设置*************************************************************************************************************** *******/void naozhong(){uint8 number = 1;uint8 a = 0;uint8 b = 0;if(0 == key4){Delay1Ms(5);if(0 == key4){a = 1;LCD_write_command(0xc0+9);LCD_write_command(0x0f);}while(!key4);}while(a){if(0 == key4){Delay1Ms(5);if(0 == key4){a = 0;run = ~run;while(!key4);}}if(run){timestr[9] = 'Y';}else{timestr[9] = 'N';}if(0 == key1){Delay1Ms(5);if(0 == key1){b = 1;}while(!key1);}while(b){if(0 == key1){Delay1Ms(5);if(0 == key1){number++;if(4 == number)b = 0;}while(!key1);if(number == 1){LCD_write_command(0xc0+9);LCD_write_command(0x0f);}if(number == 2){LCD_write_command(0xc0+6);LCD_write_command(0x0f);}if(number == 3){LCD_write_command(0xc0+3);LCD_write_command(0x0f);}}}switch(number){case 1:if(0 == key2) //闹钟秒加1的设置{Delay1Ms(5);if(0 == key2){sec1++;if(60 == sec1){sec1 = 0;}while(!key2);timestr1[7] = sec1%10+'0';timestr1[6] = sec1/10+'0';LCD_write_char(8,1,timestr1[6]);LCD_write_char(9,1,timestr1[7]);LCD_write_command(0xc0+9);}}if(0 == key3) //闹钟秒减1的设置Delay1Ms(5);if(0 == key3){sec1--;if(sec1 < 0){sec1 = 59;}while(!key3);timestr1[7] = sec1%10+'0';timestr1[6] = sec1/10+'0';LCD_write_char(8,1,timestr1[6]);LCD_write_char(9,1,timestr1[7]);LCD_write_command(0xc0+9);}}break;case 2:if(0 == key2) //闹钟分加1的设置{Delay1Ms(5);if(0 == key2){min1++;if(60 == min1){min1 = 0;}while(!key2);timestr1[4] = min1%10+'0';timestr1[3] = min1/10+'0';;LCD_write_char(5,1,timestr1[3]);LCD_write_char(6,1,timestr1[4]);LCD_write_command(0xc0+6);}}if(0 == key3) //闹钟分减1的设置{Delay1Ms(5);if(0 == key3){min1--;if(min1 < 0){min1 = 59;}while(!key3);timestr1[4] = min1%10+'0';timestr1[3] = min1/10+'0';;LCD_write_char(5,1,timestr1[3]);LCD_write_char(6,1,timestr1[4]);LCD_write_command(0xc0+6);}}break;case 3:if(0 == key2) //闹钟时加1的设置{Delay1Ms(5);if(0 == key2){hour1++;if(24 == hour1){hour1 = 0;}while(!key2);timestr1[1] = hour1%10+'0';timestr1[0] = hour1/10+'0';LCD_write_char(2,1,timestr1[0]);LCD_write_char(3,1,timestr1[1]);LCD_write_command(0xc0+3);}}if(0 == key3) //闹钟时减1的设置{Delay1Ms(5);if(0 == key3){hour1--;if(hour1 < 0){hour1 = 23;}while(!key3);timestr1[1] = hour1%10+'0';timestr1[0] = hour1/10+'0';LCD_write_char(2,1,timestr1[0]);LCD_write_char(3,1,timestr1[1]);LCD_write_command(0xc0+3);}}break;case 4:b = 0;LCD_write_command(0x0c);break;}}}LCD_write_command(0x0c);while(!key4);}/****************************************************************************** ***************************** 判断按键进入时间调整*************************************************************************************************************** *******/uint8 scan_key(void){uint8 number = 1;uint8 a = 0;if(0 == key1){Delay1Ms(5);if(0 == key1){while(!key1);a = 1;LCD_write_command(0xc0+9);LCD_write_command(0x0f);}}while(a){if(0 == key1){Delay1Ms(5);if(0 == key1){number++;while(!key1);TR0 = 0;if(number == 2){LCD_write_command(0xc0+6);LCD_write_command(0x0f);}if(number == 3){LCD_write_command(0xc0+3);LCD_write_command(0x0f);}if(number == 4){LCD_write_command(0x80+11);LCD_write_command(0x0f);}if(number == 5){LCD_write_command(0x80+8);LCD_write_command(0x0f);}if(number == 6){LCD_write_command(0x80+5);LCD_write_command(0x0f);}if(number == 7){LCD_write_command(0xc0+14);LCD_write_command(0x0f);}if(8 == number){LCD_write_command(0x0c);a = 0;number = 0;}}}switch(number){case 1:if(0 == key2) //秒加1的设置{Delay1Ms(5);if(0 == key2){sec++;if(60 == sec){sec = 0;}timestr[7] = sec%10+'0';timestr[6] = sec/10+'0';LCD_write_char(8,1,timestr[6]);LCD_write_char(9,1,timestr[7]);LCD_write_command(0xc0+9);while(!key2);}}if(0 == key3) //秒减1的设置{Delay1Ms(5);if(0 == key3){sec--;if(sec < 0){sec = 59;}timestr[7] = sec%10+'0';timestr[6] = sec/10+'0';LCD_write_char(8,1,timestr[6]);LCD_write_char(9,1,timestr[7]);LCD_write_command(0xc0+9);while(!key3);}}break;case 2:if(0 == key2) //分加1的设置{Delay1Ms(5);if(0 == key2){min++;if(60 == min){min = 0;}timestr[4] = min%10+'0';timestr[3] = min/10+'0';;LCD_write_char(5,1,timestr[3]);LCD_write_char(6,1,timestr[4]);LCD_write_command(0xc0+6);while(!key2);}}if(0 == key3) //分减1的设置{Delay1Ms(5);if(0 == key3){min--;if(min < 0){min = 59;}timestr[4] = min%10+'0';timestr[3] = min/10+'0';LCD_write_char(5,1,timestr[3]);LCD_write_char(6,1,timestr[4]);LCD_write_command(0xc0+6);while(!key3);}}break;case 3:if(0 == key2) //时加1的设置{Delay1Ms(5);if(0 == key2){hour++;while(!key2);if(24 == hour){hour = 0;}timestr[1] = hour%10+'0';timestr[0] = hour/10+'0';LCD_write_char(2,1,timestr[0]);LCD_write_char(3,1,timestr[1]);LCD_write_command(0xc0+3);}}if(0 == key3) //时减1的设置{Delay1Ms(5);if(0 == key3){while(!key3);hour--;if(hour < 0){hour = 23;}timestr[1] = hour%10+'0';timestr[0] = hour/10+'0';LCD_write_char(2,1,timestr[0]);LCD_write_char(3,1,timestr[1]);LCD_write_command(0xc0+3);}}break;case 4:if(0 == key2) //日加1的设置{Delay1Ms(5);if(0 == key2){while(!key2);calculate = 1;if(calculate == 1){if(month==1|month==3|month==5|month==7|month==8|month==10|month==12){day++;if(day > 31){day=1;}}if(month==4|month==6|month==9|month==11){day++;if(day > 30){day=1;}}if(month == 2){cal_year = 1;while(cal_year == 1){leap_year = ((year % 4 == 0 && year % 100 != 0)||(year % 400 == 0));cal_year = 0;}if(leap_year==1){day++;if(day > 30){day=1;}}else{day++;if(day > 29){day=1;}}}calculate = 0;}daystr[9] = day%10+'0';daystr[8] = day/10+'0';LCD_write_char(10,0,daystr[8]);LCD_write_char(11,0,daystr[9]);LCD_write_command(0x80+11);}}if(0 == key3) //日减1的设置{Delay1Ms(5);if(0 == key3){while(!key3);calculate = 1;if(calculate == 1){if(month==1|month==3|month==5|month==7|month==8|month==10|month==12){day--;if(day == 0){day=31;}}if(month==4|month==6|month==9|month==11){day--;if(day == 0){day=30;}}if(month == 2){cal_year = 1;while(cal_year == 1){leap_year = ((year % 4 == 0 && year % 100 != 0)||(year % 400 == 0));cal_year = 0;}if(leap_year==1){day--;if(day == 0){day=30;}}else{day--;if(day == 0){day=29;}}}calculate = 0;}daystr[9] = day%10+'0';daystr[8] = day/10+'0';LCD_write_char(10,0,daystr[8]);LCD_write_char(11,0,daystr[9]);LCD_write_command(0x80+11);}}break;case 5:if(0 == key2) //月加1的设置{Delay1Ms(5);if(0 == key2){while(!key2);month++;if(13 == month){month = 1;}daystr[6] = month%10+'0';daystr[5] = month/10+'0';LCD_write_char(7,0,daystr[5]);LCD_write_char(8,0,daystr[6]);LCD_write_command(0x80+8);}}if(0 == key3) //月减1的设置{Delay1Ms(5);if(0 == key3){while(!key3);month--;if(month == 0){month = 12;}daystr[6] = month%10+'0';daystr[5] = month/10+'0';LCD_write_char(7,0,daystr[5]);LCD_write_char(8,0,daystr[6]);LCD_write_command(0x80+8);}}break;case 6:if(0 == key2) //年加1的设置{Delay1Ms(5);if(0 == key2){while(!key2);year++;}daystr[3] = year%10+'0';daystr[2] = year/10%10+'0';daystr[1] = year/100%10+'0';daystr[0] = year/1000+'0';LCD_write_char(2,0,daystr[0]);LCD_write_char(3,0,daystr[1]);LCD_write_char(4,0,daystr[2]);LCD_write_char(5,0,daystr[3]);LCD_write_command(0x80+5);}if (0 == key3) //年减1的设置{Delay1Ms(5);if(0 == key3){while(!key3);year--;if(year == 0){year = 2020;}daystr[3] = year%10+'0';daystr[2] = year/10%10+'0';daystr[1] = year/100%10+'0';daystr[0] = year/1000+'0';LCD_write_char(2,0,daystr[0]);LCD_write_char(3,0,daystr[1]);LCD_write_char(4,0,daystr[2]);LCD_write_char(5,0,daystr[3]);LCD_write_command(0x80+5);}}break;case 7:if(0 == key2) //星期加1的设置{Delay1Ms(5);if(0 == key2){while(!key2);week++;if(7 == week){week = 0;}LCD_write_char(14,1,week+'0');LCD_write_command(0xc0+14);}}if (0 == key3) //星期减1的设置{Delay1Ms(5);if(0 == key3){while(!key3);week--;if(week < 0){week = 6;}LCD_write_char(14,1,week+'0');LCD_write_command(0xc0+14);}}break;case 8:TR0 = 1;break;}}}/****************************************************************************** ***************************** 主函数******************************************************************************************************************* *******/void main(void){systimer0_init();LCD_init();LCD_write_str(0,0,str1);LCD_write_str(0,1,str2);LCD_write_str(13,0,str3);speaker = 0;while (1){TimeChange();scan_key();naozhong();LCD_write_str(2,0,daystr);LCD_write_str(2,1,timestr);LCD_write_char(14,1,WeekData);if(1 == run){if(sec==sec1 & month==month1 & hour==hour){speaker_num =30;beep = 1;}}else{speaker_num =0;beep = 0;}}}/****************************************************************************** ***************************** 定时中断0 ******************************************************************************************************************* *******/void time_0() interrupt 1{TH0 = 0xDC; // 定时10msTL0 = 0x00;number++;if(number ==100){sec++;if(beep){speaker=!speaker;speaker_num--;if(speaker_num == 0){beep=0;speaker = 0;}}if(sec == 60){sec = 0;min++;if(min == 60){min = 0;hour++; //小时加1speaker_num = hour%12; //蜂鸣器响的次数beep = 1;if(hour == 24){hour = 0;calculate = 1;if(calculate == 1) //判断这个月有多少天{if(month==1|month==3|month==5|month==7|month==8|month==10|month==12){day++;if(month==7|month==12){week++;if(7 == week){week = 0;}}else{if(day <= 31){week++;if(7 == week){week = 0;}}}if(day > 31){if(month==7|month==12){day = 1;}else{day=0;}month++;if(month > 12){month=1;year++;cal_year=1;}}}if(month==4|month==6|month==9|month==11) {day++;week++;if(7 == week){week = 0;}if(day > 30){day=1;month++;if(month > 12){month=1;year++;cal_year=1;}}}if(month == 2){while(cal_year == 1){leap_year = ((year % 4 == 0 && year % 100 != 0)||(year % 400 == 0));cal_year = 0;}if(leap_year==1){day++;if(day <= 30){week++;if(7 == week){week = 0;}}if(day > 30){day=1;month++;if(month > 12){month=1;year++;cal_year=1;}}}else{day++;week++;if(7 == week){week = 0;}if(day > 29){day=1;month++;if(month > 12){month=1;year++;cal_year=1;}}}}}calculate=0;}}}}}////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// Lcd1602.c子程序：////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// /****************************************************************************** ***************************** lcd1602低层函数********************************************************************************************************************* *******/# include <reg52.h># include <intrins.h># include "lcd16024.h"# define LCD_DATA P0 //LCD1602的数据口定义sbit LCD_RS = P0^0; //LCD1602控制线的定义，4位控制方式sbit LCD_RW = P0^1;sbit LCD_EN = P0^2;/****************************************************************************** ***************************** 延时1MS********************************************************************************************************************* *******/void Delay1Us(uint16 n){for(;n>0;n--){_nop_();}}/****************************************************************************** ***************************** 延时1MS********************************************************************************************************************* *******/void Delay1Ms(uint16 n){while(n--){Delay1Us(1000);}}/****************************************************************************** ***************************** 延时1MS********************************************************************************************************************* *******/void LCD_en_write(void){LCD_EN=0;LCD_EN=1;Delay1Us(1);LCD_EN=0;}/****************************************************************************** ************************ LCD写一个字节命令函数************************************************************************************************************ *******/void LCD_write_command(uint8 command){Delay1Us(16);LCD_RS=0;LCD_RW=0;LCD_DATA&=0x0f;LCD_DATA|=command&0xf0;LCD_en_write();command=command<<4;LCD_DATA&=0x0f;LCD_DATA|=command&0xf0;LCD_en_write();}/****************************************************************************** ********************** LCD写一个字节数据函数*************************************************************************************************************** *******/void LCD_write_data(uint8 Data){Delay1Us(16);LCD_RS=1;LCD_RW=0;LCD_DATA&=0x0f;LCD_DATA|=Data&0xf0;LCD_en_write();Data=Data<<4;LCD_DATA&=0x0f;LCD_DATA|=Data&0xf0;LCD_en_write();}/****************************************************************************** ***************************** LCD1602光标定位函数************************************************ x--列0~15；y--行0~1********************************************************************************************************* *******/void LCD_set_xy(uint8 x,uint8 y){uint8 address;if(y==0)address=0x80+x;else address=0xc0+x;LCD_write_command(address);}/***************************************************************************************************** LCD1602 初始化函数，四位显示方式******************************************************************************************************* *******/void LCD_init(){LCD_write_command(0x28);// Delay1Us(40);LCD_write_command(0x28);LCD_write_command(0x0c);LCD_write_command(0x01);LCD_write_command(0x06);Delay1Ms(2);}/****************************************************************************** ***************************** LCD写字符串函数******************************************************* x--列0~15；y--行0~1******************************************************* s指向字符串数组**************************************************************************************************************** *******/void LCD_write_str(uint8 x,uint8 y,uint8 *s){LCD_set_xy(x,y);while(*s){LCD_write_data(*s);s++;}}/****************************************************************************** ***************************** LCD写一个字符函数******************************************************* x--列0~15；y--行0~1******************************************************* d--字符的ASCII码**************************************************************************************************************** *******/void LCD_write_char(uint8 x,uint8 y,uint8 d){LCD_set_xy(x,y);LCD_write_data(d);}/*////////////////////////////////////////////////////////////////// 等待繁忙标志/////////////////////////////////////////////////////////////////void LCD_wait(void){P0 = 0xFF;do{LCD_RS = 0;LCD_RW = 1;LCD_EN = 0;LCD_EN = 1;}while (BUSY == 1);LCD_EN = 0;}*//****************************************************************************** ***************************** LCD1602左移********************************************************************************************************************* *******void LCD_youyi(uint8 y,uint8 *s){LCD_write_str(17,y,s);for(a=0;a<16;a++){LCD_write_command(0x1c); //左移LCD_write_command(0x1c); 为右移Delay1Ms(6);}}*///LCD_write_command(0x0d);//光标闪烁//LCD_write_command(0x0e);//光标显示不闪烁//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// Lcd1602.h头文件////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// #ifndef _LCD16024_H_#define _LCD16024_H_typedef unsigned char uint8;typedef unsigned int uint16;typedef unsigned long uint32;void Delay1Us(uint16 n);void Delay1Ms(uint16 n);void LCD_write_data(uint8 dat);void LCD_write_command(uint8 com); //BuysC为0时忽略忙检测void LCD_set_xy(uint8 x,uint8 y);void LCD_en_write(void);void LCD_write_char(uint8 x, uint8 y, uint8 Data1);void LCD_write_str(uint8 x, uint8 y,uint8 *s);void LCD_init();//void LCD_wait(void);//void LCD_youyi(uint8 y,uint8 *s);#endif。
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//液晶显示温度#include "AT89X52.H"#define Ddata P0sbit RS=P2^7; //命令数据控制端sbit RW=P2^6; //读写选择端sbit LCDE=P2^5; //液晶使能端sbit DQ=P2^0; //ds18b20与单片机连接口#define uchar unsigned char#define uint unsigned intunsigned char hour=0,min=0,sec=0; //定义初值unsigned int count=0;unsigned char line1[16]={" temp: "}; //16个字符unsigned char line2[16]={" time: 00:00:00"}; //16个字符unsigned char tab[]={'0','1','2','3','4','5','6','7','8','9'}; //数组uchar data disdata[5];uint tvalue; //温度值uchar tflag; //温度正负标志void time();/*************************lcd1602程序**************************/ void delay1ms(unsigned int ms)//延时1毫秒（不够精确的）{unsigned int i,j;for(i=0;i<ms;i++)for(j=0;j<110;j++);}void delay5ms()//延时5毫秒（不够精确的）{unsigned int i;for (i=0;i<1000;i++);}void delay50us(){register int i;for (i=0;i<20;i++);}void delay(){unsigned char m,n;for(m=255;m>0;m--)for(n=255;n>0;n--);}void wr_com(unsigned char comm) //********写控制字符程序E=1 RS=0RW=0 **********//{LCDE=0; //使能端RS=0; //********RS寄存器选择输入端，当RS=0；当进行写模块操作，指向指令寄存器。
RW=0; //********当RS=1，无论是读操作还是写操作，都是指向数据寄存器。
LCDE=1;Ddata=comm;RS=0;RW=0;LCDE=0;void wr_data(unsigned char dat)//*****当前位置写字符子程序：E=1 RS=1 RW=0{LCDE=0;RS=0; //********RS寄存器选择输入端，当RS=0；当进行写模块操作，指向指令寄存器。
RW=0; //********当RS=1，无论是读操作还是写操作，都是指向数据寄存器。
RS=1;RW=0;LCDE=1;Ddata=dat; //将dat赋给P0口LCDE=0;RS=0;RW=0;}unsigned char busycheck()//*****忙状态检查*******//{unsigned char i;LCDE=0;RS=0;RW=0;RS=0;RW=1;LCDE=1;i=Ddata;LCDE=0;return(i);}void init()//**********初始化程序，必须按照产品的资料介绍的过程进行********// {wr_com(0x38); //*****显示模式设置必须三次，不用检测忙信号delay5ms();wr_com(0x38);delay5ms();wr_com(0x38);delay5ms();wr_com(0x01); ///***清屏****delay5ms();busycheck();wr_com(0x08);delay5ms();busycheck();delay5ms();wr_com(0x06); ///****光标移动设置，写一个字符后地址指针加1***delay5ms();busycheck();delay50us();wr_com(0x38); ////***显示模式设置****delay50us();busycheck();delay50us();wr_com(0x0c); /////***显示开，不显示光标***delay50us();busycheck();delay50us();wr_com(0x40); //set cgram addressdelay50us();delay50us(); //***这些延时可用可不用***// }void display(){ unsigned char i;wr_com(0x80); //set ram addressdelay50us();busycheck();delay50us();for(i=0;i<6;i++){wr_data(line1[i]); //display（6个字符）delay50us();busycheck();}busycheck();delay50us();wr_com(0xc0); //0xc0=0x80+0x40 delay50us();busycheck();delay50us();for(i=0;i<16;i++){wr_data(line2[i]); //displaydelay50us();busycheck();}}/******************************温度传感器ds1820程序***************************************/void delay_18B20(unsigned int i)//延时1微秒{while(i--);}void ds1820rst()/*ds1820复位*/{ unsigned char x=0;DQ = 1; //DQ复位delay_18B20(4); //延时DQ = 0; //DQ拉低delay_18B20(100); //精确延时大于480usDQ = 1; //拉高delay_18B20(40);}uchar ds1820rd()/*读数据*/{ unsigned char i=0;unsigned char dat = 0;for (i=8;i>0;i--) //读一个字节的数据函数{ DQ = 0; //给脉冲信号dat>>=1;DQ = 1; //给脉冲信号if(DQ)dat|=0x80; //等价于 dat = dat | 0x80,dat和0x80做“或”的运算，结果是最高位置1，其它位保持不变。
delay_18B20(10);}return(dat);}void ds1820wr(uchar wdata)/*写数据*/{unsigned char i=0;for (i=8; i>0; i--){ DQ = 0;DQ = wdata&0x01;delay_18B20(10);DQ = 1;wdata>>=1; //右移一位}}read_temp()/*读取温度值并转换*/{uchar a,b;ds1820rst(); //ds1802/初始化程序ds1820wr(0xcc);//*跳过读序列号*/ds1820wr(0x44);//*启动温度转换*/ds1820rst();ds1820wr(0xcc);//*跳过读序列号*/ds1820wr(0xbe);//*读取温度*/a=ds1820rd(); //读低八位b=ds1820rd(); //读高八位tvalue=b;tvalue<<=8;tvalue=tvalue|a;if(tvalue<0x0fff)tflag=0;else //“&” 是逻辑与“|” 是逻辑或if（dat & 0x01）：不管dat是什么数和0x01(00000001)做了“与”的运算后，最低位保持不变，其它位均为0.如果dat的最低位为1，则表达式为真，就会执行if语句中的内容。
如果dat最低位为0，则表达式为假，不执行if语句，执行if语句后的下一条语句。
dat |= 0x80：等价于dat = dat | 0x80,dat和0x80做“或”的运算，意思是最高位置1，其它位保持不变。
具体的可以去参考一下C语言的相关语法。
{tvalue=~tvalue+1;tflag=1;}tvalue=tvalue*(0.625);//温度值扩大10倍，精确到1位小数return(tvalue);}/***************************************************** **************/void ds1820disp()//温度值显示{ uchar flagdat;disdata[0]=tvalue/1000+0x30;//百位数disdata[1]=tvalue%1000/100+0x30;//十位数disdata[2]=tvalue%100/10+0x30;//个位数disdata[3]=tvalue%10+0x30;//小数位if(tflag==0)flagdat=0x20;//正温度不显示符号elseflagdat=0x2d;//负温度显示负号:-if(disdata[0]==0x30){disdata[0]=0x20;//如果百位为0，不显示if(disdata[1]==0x30){disdata[1]=0x20;//如果百位为0，十位为0也不显示}}wr_com(0x88);wr_data(flagdat);//显示符号位wr_com(0x89);wr_data(disdata[0]);//显示百位wr_com(0x8a);wr_data(disdata[1]);//显示十位wr_com(0x8b);wr_data(disdata[2]);//显示个位wr_com(0x8c);wr_data(0x2e);//显示小数点wr_com(0x8d);wr_data(disdata[3]);//显示小数位}void main(){TMOD=0X01;EA=1;ET0=1;TR0=1;TH0=(65536-4995)/256;TL0=(65536-4995)%256;init();while(1){read_temp();//读取温度ds1820disp();//显示time(); //时间程序display();//时间显示程序}}void t0(void)interrupt 1 using 0{TH0=(65536-4995)/256;TL0=(65536-4995)%256;count++;if(count==200){count=0;sec++;}if(sec==60){sec=0;min++;}if(min==60){min=0;hour++;}if(hour==24){hour=0;}}void time(){line2[15]=tab[sec%10];line2[14]=tab[sec/10];line2[12]=tab[min%10];line2[11]=tab[min/10];line2[9]=tab[hour%10];line2[8]=tab[hour/10];if(!P1_2){delay();if(!P1_2){delay();sec++;if(sec==60){sec=0;}}}if(!P1_1){delay();if(!P1_1){delay();min++;if(min==60){min=0;}}}if(!P1_0){delay();if(!P1_0){delay();hour++;if(hour==24){hour=0;}}} }。