51单片机+AT24C02+按键+Proteus仿真时钟源程序

/**************************************
名称：89c52+at24c02+键盘时钟程序 
工具：protues仿真软件 
作者：kwx618
时间：2011-09-10
**************************************/
#include <reg52.h>
#include <intrins.h>
#include"at24c02.h"
#define uchar unsigned char 
#define uint unsigned int
sbit LCD_RS=P0^0;
sbit LCD_RW=P0^1;
sbit LCD_EN=P0^2;
sbit S1=P1^2;
sbit S2=P1^3;
sbit S3=P1^4;
sbit S4=P1^5;
char year,mounth,day,hour,minute,second;
uchar num,count;
bit write=0;  //写2402标志 
uchar code nyr_table[]=" 20  -  -  ";
uchar code sfm_table[]="   :  :  ";

/************延时1ms函数***************/
void delay1ms(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=112;y>0;y--);
}

/**************LCD1602程序***********/
void LCD_BUSY()
{
	P2=0x00;
	LCD_RS=0;
	LCD_RW=1;
	LCD_EN=1;
	while(P2&0x80);
	LCD_EN=0;
}

void writeLCD_command(uchar cmd)
{
  	LCD_BUSY();
	LCD_RS=0;
	LCD_RW=0;
	P2=cmd;
    _nop_();
	LCD_EN=1;
	_nop_();
	LCD_EN=0;	
}

void writeLCD_data(uchar date)
{
	LCD_BUSY();
	LCD_RS=1;
	LCD_RW=0;
	P2=date;
	_nop_();
	LCD_EN=1;
	_nop_();
	LCD_EN=0;		
}

void write_nyrsfm(char add,char date)
{
	char shiwei,gewei;
	shiwei=date/10;
	gewei=date%10;
	writeLCD_command(0x80|add);
	delay1ms(1);
	writeLCD_data(0x30+shiwei);
	delay1ms(1);
	writeLCD_data(0x30+gewei);
	delay1ms(1);
}
 
void LCD_init()
{ 
 	uchar num1,num2;
	year=0;mounth=1;day=1;
	hour=23;minute=59;second=59;
	LCD_BUSY();
	writeLCD_command(0x38);//设置16*2显示，5*7点阵，8位数据接口 
	delay1ms(5);           //此处必须加延时，否则LCD不显示	
	writeLCD_command(0x0c);//开显示，光标不显示 
	delay1ms(5);           //此处必须加延时，否则光标不会移动 
    writeLCD_command(0x06);//读或写字符后，光标自动加1，整屏不移动 
	delay1ms(5);
	writeLCD_command(0x02);//数据指针清0
	delay1ms(5);
	writeLCD_command(0x80|0x02);
	for(num1=0;num1<11;num1++)  
	{
		writeLCD_data(nyr_table[num1]);	
	}
	writeLCD_command(0x80|0x43);
	for(num2=0;num2<9;num2++)
	{
		writeLCD_data(sfm_table[num2]);	
	}
	write_nyrsfm(0x80|0x05,year);
	_nop_();
	write_nyrsfm(0x80|0x08,mounth);
	_nop_();
	write_nyrsfm(0x80|0x0b,day);
	_nop_();
	write_nyrsfm(0x80|0x44,hour);
	_nop_();
	write_nyrsfm(0x80|0x47,minute);
	_nop_();
	write_nyrsfm(0x80|0x4a,second);
	_nop_();
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;	  
}

/**************************************************
         名称：按键程序 
		   S1: 设置键 
		   S2：时间加 
		   S3：时间减 
**************************************************/
void keyscan()
{ 
	if(S1==0)
	{
		delay1ms(10);
		if(S1==0)
			num++;	       
			while(!S1);
			switch(num)
			{
				case 1: TR0=0;
					    writeLCD_command(0x80|0x4b);
					    delay1ms(1);
				        writeLCD_command(0x0f);
					    delay1ms(1);
						break;	
				case 2:	TR0=0;
					    writeLCD_command(0x80|0x48);
				        writeLCD_command(0x0f);
						break;
				case 3:	TR0=0;
					    writeLCD_command(0x80|0x45);
				        writeLCD_command(0x0f);
					   	break;
				case 4:	TR0=0;
					    writeLCD_command(0x80|0x0c);
					    writeLCD_command(0x0f);
					    break;
				case 5:	TR0=0;
					    writeLCD_command(0x80|0x09);
					    writeLCD_command(0x0f);
					  	break;
				case 6:	TR0=0;
					    writeLCD_command(0x80|0x06);
					    writeLCD_command(0x0f);
					   	break;
				case 7:	num=0;
				        writeLCD_command(0x0c);
						TR0=1;
						break;
				default:break;	
			}			
    }
}

void up_downsetkey()
{
    //keyscan();
	if(num!=0)
	{
		if(S2==0)
		{
			delay1ms(10);
			if(S2==0)
				while(!S2);
				switch(num)
				{
					case 1: second++;
							if(second==60)
								second=0;		
					       	write_nyrsfm(0x80|0x4a,second);
							delay1ms(5);
							write2402_data(1,second);
							delay1ms(5);
							break;
					case 2: minute++;
							if(minute==60)
								minute=0;		
					       	write_nyrsfm(0x80|0x47,minute);
							delay1ms(5);
							write2402_data(2,minute);
							delay1ms(5);
							break;
					case 3: hour++;
							if(hour==24)
								hour=0;		
					       	write_nyrsfm(0x80|0x44,hour);
							delay1ms(5);
							write2402_data(3,hour);
							delay1ms(5);
							break;
					case 4: day++;
							if(day==30)
								day=0;		
					       	write_nyrsfm(0x80|0x0b,day);
							delay1ms(5);
							write2402_data(4,day);
							delay1ms(5);
							break;
					case 5: mounth++;
							if(mounth==12)
								mounth=0;		
					       	write_nyrsfm(0x80|0x08,mounth);
							delay1ms(5);
							write2402_data(5,mounth);
							delay1ms(5);
							break;
					case 6: year++;
							if(year==99)
								year=0;		
					       	write_nyrsfm(0x80|0x05,year);
							delay1ms(5);
							write2402_data(6,year);
							delay1ms(5);
							break;
				    default:break;
				}
		}
		if(S3==0)
		{
			delay1ms(10);
			if(S3==0)
				while(!S3);
				switch(num)
				{
					case 1: second--;
							if(second==-1)
								second=59;		
					       	write_nyrsfm(0x80|0x4a,second);
							delay1ms(1);
							write2402_data(1,second);
							break;
					case 2: minute--;
							if(minute==-1)
								minute=59;		
					       	write_nyrsfm(0x80|0x47,minute);
							write2402_data(2,minute);
							break;
					case 3: hour--;
							if(hour==-1)
								hour=23;		
					       	write_nyrsfm(0x80|0x44,hour);
							write2402_data(3,hour);
							break;
					case 4: day--;
							if(day==-1)
								day=30;		
					       	write_nyrsfm(0x80|0x0b,day);
							write2402_data(4,day);
							break;
					case 5: mounth--;
							if(mounth==-1)
								mounth=12;		
					       	write_nyrsfm(0x80|0x08,mounth);
							write2402_data(5,mounth);
							break;
					case 6: year--;
							if(year==-1)
								year=99;		
					       	write_nyrsfm(0x80|0x05,year);
							write2402_data(6,year);
							break;
				    default:break;
				}
		}	
	}	
}

/*void display()     //开始的时候采用这种边显示边写2402的方式，但是程序写不到2402，
{					 //很郁闷。不过调整时间时光标很正常，一直想找个方法让光标正常而且能写进
	if(count==20)	  // 2402的方法，但是没有想出来 
	{
		second++;
		count=0;
		if(second==60)
		{
			second=0;
			minute++;
			if(minute==60)
			{
				minute=0;
				hour++;
				if(hour==24)
				{								 
					hour=0;
					day++;
					if(day==31)
					{
						day=0;
						mounth++;
						if(mounth==13)
						{
							mounth=0;
							year++;
							write_nyrsfm(0x80|0x05,year);
							delay1ms(1);
							write2402_data(6,year);
							delay1ms(1);	
						}
						write_nyrsfm(0x80|0x08,mounth);
						delay1ms(1);
						write2402_data(5,mounth);
						delay1ms(1);
					}
					write_nyrsfm(0x80|0x0b,day);
					delay1ms(1);
					write2402_data(4,day);
					delay1ms(1);
				}
				write_nyrsfm(0x80|0x44,hour);
				delay1ms(1);
				write2402_data(3,hour);
				delay1ms(1);
			}
			write_nyrsfm(0x80|0x47,minute);
			delay1ms(1);
			write2402_data(2,minute);
			delay1ms(1);
		}
		write_nyrsfm(0x80|0x4a,second);
		delay1ms(1);
		write2402_data(1,second);
		delay1ms(1);
	}	
} */

/************显示程序****************/ 
void display()
{ 
	//year=0;mounth=1;day=0;	   // 开始的时候不写这两句，显示的结果就是2000-0/-0/  23-0/-0/ ， 
	//hour=23;minute=59;second=59; // 解决办法是先在加上这两句，然后把初始化里的那两句屏蔽掉，然后编译显示， 
   	write_nyrsfm(0x80|0x05,year);   // 在回过头来去掉初始化里的屏蔽，把这两句删掉编译就显示正常了，具体为什么会 
   	delay1ms(1);			   		//这样，我也不清楚，有待解决。 
   	write_nyrsfm(0x80|0x08,mounth);
	delay1ms(1);
	write_nyrsfm(0x80|0x0b,day);
	delay1ms(1);
	write_nyrsfm(0x80|0x44,hour);
	delay1ms(1);
	write_nyrsfm(0x80|0x47,minute);
	delay1ms(1);
	write_nyrsfm(0x80|0x4a,second);
	delay1ms(1);
}


void main()
{
	init_2402();
	delay1ms(5);
	LCD_init();
	delay1ms(5);            //此处也必须加延时，否则不会在指定的位置显示 
	second =read_data(0);	//读出24c02保存的值赋于sec
    if(second>60)		   //防止首次读出错误数据 
    	second=0;	
	delay1ms(5);
    minute=read_data(1);   //读出24c02保存的值赋于sec
	if(minute>60)		  //防止首次读出错误数据 
   		 minute=0;	
    delay1ms(5);
	hour=read_data(2);	  //读出24c02保存的值赋于sec
	if(hour>24)			 //防止首次读出错误数据 
    hour=0;
	delay1ms(5);
	day=read_data(3);	//读出24c02保存的值赋于sec
    if(day>30)				   //防止首次读出错误数据 
    	day=0;	
	delay1ms(5);
    mounth=read_data(4);	  //读出24c02保存的值赋于sec
	if(mounth>12)				   //防止首次读出错误数据 
   		 mounth=0;	
    delay1ms(5);
	year=read_data(5);	  //读出24c02保存的值赋于sec
	if(year>12)				   //防止首次读出错误数据 
    	year=0;
	delay1ms(5);
	while(1)
	{   
		display();
		delay1ms(1);
		keyscan();
		delay1ms(1);
		up_downsetkey();
		delay1ms(1);
		if(write==1)
    	{
		    write2402_data(0,second);
			delay1ms(1);
     	    write2402_data(1,minute);
	    	delay1ms(1);
	    	write2402_data(2,hour);
	    	delay1ms(1);
			write2402_data(3,day);
			delay1ms(1);
     	    write2402_data(4,mounth);
	    	delay1ms(1);
	    	write2402_data(5,year);
	    	delay1ms(1); 
			write=0; //清0	 
		}  
	}
}

void intputtime0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	count++;
	if(count==16)//此处应该是20，但是用protues仿真时会发现误差很大，所以我调到了16，时间刚好。 
	{
		second++;
		count=0;
		if(second==60)
		{
			second=0;
			minute++;
			if(minute==60)
			{
				minute=0;
				hour++;
				if(hour==24)
				{								 
					hour=0;
					day++;
					if(day==31)
					{
						day=0;
						mounth++;
						if(mounth==13)
						{
							mounth=0;
							year++;

						}

					}

				}

			}

		}

			write=1;
	}	
}