C51 LCD(LM044L)多功能可调时钟设计

1、LCD(LM044L)多功能可调时钟设计设计思路：利用单片机的定时器定时，产生时钟的时、分、秒，年、月、日，用LCD(LM044L)显示出时间的时、分、秒，年、月、日，并用英文显示“星期几”。

具有百分之一秒，秒，分，跑表功能。

一键开始并记录4组结果。

使用若干个按键调整时间，一个用于选择调整的时间位，一个用于调整时间。

也可以使用多个键，用于调整各自的时间位。

首先在proteus上绘制电路，编程模拟运行实现。

运行效果代码#include<reg51.h> //包含单片机寄存器的头文件#include<stdlib.h> //包含随机函数rand()的定义文件#include<intrins.h> //包含_nop_()函数定义的头文件sbit RS=P2^0; //寄存器选择位，将RS位定义为P2.0引脚sbit RW=P2^1; //读写选择位，将RW位定义为P2.1引脚sbit E=P2^2; //使能信号位，将E位定义为P2.2引脚sbit BF=P0^7; //忙碌标志位，，将BF位定义为P0.7引脚unsigned char code table[]="2011-12-01"; //初始化液晶显示10 unsigned char code table1[]=" 12:00:55"; //12 unsigned char code table2[]="week 3 00:00:00"; //15 unsigned char code table3[]="00:00:00 00:00:00 00:00:00 00:00:00"; unsigned char count,s1num,s5num;char second,minute,hour,day,month,year,week;char ms,sec,minu;sbit s1=P1^0; //功能键sbit s2=P1^1; //加键sbit s3=P1^2; //减键sbit s4=P1^3; //保存并退出sbit s5=P1^4; //秒表void delay1ms() //计算延迟1ms{unsigned char i,j;for(i=0;i<10;i++)for(j=0;j<33;j++);}/***************************************************** 函数功能：延时若干毫秒入口参数：n***************************************************/void delay(unsigned char n){unsigned char i;for(i=0;i<n;i++)delay1ms();}/*****************************************************函数功能：判断液晶模块的忙碌状态返回值：result。

result=1，忙碌;result=0，不忙***************************************************/unsigned char BusyTest(void){bit result;RS=0; //根据规定，RS为低电平，RW为高电平时，可以读状态RW=1;E=1; //E=1，才允许读写_nop_(); //空操作_nop_();_nop_();_nop_(); //空操作四个机器周期，给硬件反应时间result=BF; //将忙碌标志电平赋给resultE=0; //将E恢复低电平return result;}/*****************************************************函数功能：写指令入口参数：dictate***************************************************/void WriteInstruction (unsigned char dictate){while(BusyTest()==1); //如果忙就等待RS=0; //根据规定，RS和R/W同时为低电平时，可以写入指令RW=0;E=0; //E置低电平(根据表8-6，写指令时，E为高脉冲，// 就是让E从0到1发生正跳变，所以应先置"0"_nop_();_nop_(); //空操作两个机器周期，给硬件反应时间P0=dictate; //将数据送入P0口，即写入指令或地址_nop_();_nop_();_nop_();_nop_(); //空操作四个机器周期，给硬件反应时间E=1; //E置高电平_nop_();_nop_();_nop_();_nop_(); //空操作四个机器周期，给硬件反应时间E=0; //当E由高电平跳变成低电平时，液晶模块开始执行命令}/*****************************************************函数功能：写数据入口参数：y(为字符常量)***************************************************/void WriteData(unsigned char y){while(BusyTest()==1);RS=1; //RS为高电平，RW为低电平时，可以写入数据RW=0;E=0; //E置低电平(根据表8-6，写指令时，E为高脉冲，// 就是让E从0到1发生正跳变，所以应先置"0"P0=y; //将数据送入P0口，即将数据写入液晶模块_nop_();_nop_();_nop_();_nop_(); //空操作四个机器周期，给硬件反应时间E=1; //E置高电平_nop_();_nop_();_nop_();_nop_(); //空操作四个机器周期，给硬件反应时间E=0; //当E由高电平跳变成低电平时，液晶模块开始执行命令}/*****************************************************函数功能：对LCD的显示模式进行初始化设置***************************************************/void LcdInitiate(void){unsigned char num;second=55;minute=0;hour=12;week=3;day=1;month=12;year=11;count=0;s1num=0;s5num=0;ms=0;sec=0;minu=0;E=0;delay(15); //延时15ms，首次写指令时应给LCD一段较长的反应时间WriteInstruction(0x38); //显示模式设置：16×2显示，5×7点阵，8位数据接口delay(5); //延时5ms，给硬件一点反应时间WriteInstruction(0x38);delay(5);WriteInstruction(0x38); //连续三次，确保初始化成功delay(5);WriteInstruction(0x0c); //显示模式设置：显示开，无光标，光标不闪烁delay(5);WriteInstruction(0x06); //显示模式设置：光标右移，字符不移delay(5);WriteInstruction(0x01); //清屏幕指令，将以前的显示内容清除delay(5);WriteInstruction(0x80);for(num=0;num<10;num++) //让液晶显示日期{WriteData(table[num]);delay(5);}WriteInstruction(0xc0);for(num=0;num<12;num++) //让液晶显示时间{WriteData(table1[num]);delay(5);}WriteInstruction(0x80+20);for(num=0;num<15;num++){WriteData(table2[num]);delay(5);}WriteInstruction(0xc0+20);for(num=0;num<17;num++){WriteData(table3[num]);delay(5);}TMOD=0x11; //定时器中断初始化TH0=(65536-50000)/256;TL0=(65536-50000)%256;EA=1;ET0=1;TR0=1;TH1=(65536-50000)/256;TL1=(65536-50000)%256;ET1=1;TR1=0;}//-------写年月日---------------void write_nyr(unsigned char add,unsigned char date){unsigned char i,j;i=date/10;j=date%10;WriteInstruction(0x80+add);WriteData(0x30+i);WriteData(0x30+j);}//--------写时分秒----------------------void write_sfm(unsigned char add,unsigned char date){unsigned char i,j;i=date/10;j=date%10;WriteInstruction(0xc0+add);WriteData(0x30+i);WriteData(0x30+j);}//-------------写星期----------------------------void write_week(unsigned char add,unsigned char date){WriteInstruction(0x80+10+add);WriteData(0x30+date);}void write_ms(unsigned char add,unsigned char date) //写毫秒{unsigned char i,j;i=date/10;j=date%10;WriteInstruction(0x80+10+add);WriteData(0x30+i);WriteData(0x30+j);}void write_mb(unsigned char add,unsigned char date) //记录跑秒时间{unsigned char i,j;i=date/10;j=date%10;WriteInstruction(0xc0+20+add);WriteData(0x30+i);WriteData(0x30+j);}//----------键盘扫描--------------------void keyscan(){if(s1==0) //第一个键是否按下{delay(5);if(s1==0){while(!s1);s1num++;if(s1num==1) //第一个键被按一次{TR0=0;WriteInstruction(0xc0+11);WriteInstruction(0x0f);}if(s1num==2){WriteInstruction(0xc0+8);}if(s1num==3){WriteInstruction(0xc0+5);}if(s1num==4){WriteInstruction(0x80+9);}if(s1num==5){WriteInstruction(0x80+6);}if(s1num==6){WriteInstruction(0x80+3);}if(s1num==7){WriteInstruction(0x80+20+5);//s1num=0; //循环一次}}}if(s1num!=0) //如果功能键被按下{if(s2==0) //第二个按下{delay(5);if(s2==0){while(!s2);if(s1num==1) //第二个键被按一次，秒钟加一{second++;if(second==60)second=0;write_sfm(10,second);WriteInstruction(0x80+0x40+11);}if(s1num==2) //第二个键被按二次，分钟加一{minute++;if(minute==60)minute=0;write_sfm(7,minute);WriteInstruction(0x80+0x40+8);}if(s1num==3) //第二个键被按三次，时钟加一{hour++;if(hour==24)hour=0;write_sfm(4,hour);WriteInstruction(0x80+0x40+5);}if(s1num==4) //日期加一{day++;if(day==32)day=1;write_nyr(8,day);WriteInstruction(0x80+9);}if(s1num==5) //月加一{month++;if(month==13)month=1;write_nyr(5,month);WriteInstruction(0x80+6);}if(s1num==6) //年加一{year++;if(year==99)year=0;write_nyr(2,year);WriteInstruction(0x80+3);}if(s1num==7) //星期加一{week++;if(week==8)week=1;write_week(15,week);WriteInstruction(0x80+25);}}}if(s3==0) //第三个键被按下{delay(5);if(s3==0){while(!s3);if(s1num==1) //秒减一{second--;if(second==-1)second=59;write_sfm(10,second);WriteInstruction(0x80+0x40+11);}if(s1num==2) //分减一{minute--;if(minute==-1)minute=59;write_sfm(7,minute);WriteInstruction(0x80+0x40+8);}if(s1num==3) //时减一{hour--;if(hour==-1)hour=23;write_sfm(4,hour);WriteInstruction(0x80+0x40+5);}if(s1num==4) //日减一{day--;if(day==0)day=31;write_nyr(8,day);WriteInstruction(0x80+9);}if(s1num==5) //月减一{month--;if(month==0)month=12;write_nyr(5,month);WriteInstruction(0x80+6);}if(s1num==6) //年减一{year--;if(year==-1)year=99;write_nyr(2,year);WriteInstruction(0x80+3);}if(s1num==7) //日期减一{week--;if(week==0)week=7;write_week(15,week);WriteInstruction(0x80+20+15);}}}if(s4==0) //保存并退出{s1num=0;WriteInstruction(0x0c);TR0=1;}}if(s5==0){while(!s5);TR1=1;s5num++;if(s5num==2){write_mb(0,minu);write_mb(3,sec);write_mb(6,ms);}if(s5num==3){write_mb(9,minu);write_mb(12,sec);write_mb(15,ms);}if(s5num==4){s5num=0;TR1=0;ms=0;sec=0;minu=0;write_ms(20,sec);write_ms(17,minu);write_ms(23,ms);write_mb(0,minu);write_mb(3,sec);write_mb(6,ms);write_mb(9,minu);write_mb(12,sec);write_mb(15,ms);}}}/********************************************************************** main function***********************************************************************/ void main(void){LcdInitiate(); //调用LCD初始化函数while(1){keyscan();}}/*******************************************************函数功能：定时器T0的中断服务函数********************************************************/void timer1() interrupt 3{TH1=(65536-10000)/256;TL1=(65536-10000)%256;ms++;if(ms==100){ms=0;sec++;if(sec==60){sec=0;minu++;}write_ms(20,sec);write_ms(17,minu);}write_ms(23,ms);}void timer0() interrupt 1{TH0=(65536-50000)/256;TL0=(65536-50000)%256;count++;if(count==18){//ms=0;count=0;second++;if(second==60) //秒计满60，秒归0，分+1{second=0;minute++;if(minute==60) //分计满60，分归0，时+1{minute=0;hour++;write_led();if(hour==24) //时计满24，时归0，星期+1，日+1{hour=0;week++;day++;if(week==8) week=1; //星期计满7，星期归1if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) //大月三十一天{if(day==32) //大月天数计满31，日归1，月+1{day=1;month++;}}if(month==4||month==6||month==9||month==11) //小月三十天{if(day==31){ //小月天数计满30，日归1，月+1day=1;month++;}}if(month==13) //月计满12，月归1，年+1{month=1;year++;if(year==99) //年计满99，年归0{year==0;}write_nyr(2,year);}write_nyr(5,month);}write_nyr(8,day);write_week(15,week);}write_sfm(4,hour);}write_sfm(7,minute);}write_sfm(10,second);}。