1602.c

液晶1602时钟

#include<reg52.h>
#define uchar unsigned char 
#define uint unsigned int

sbit lcdrs=P1^2;
sbit lcdrw=P1^3;
sbit lcden=P1^4;
sbit shezhi=P3^5;
sbit add=P3^6;
sbit dec=P3^7;

uchar count,shezhinum;
char miao,shi,fen;
uchar code table[]="  wang shu mao  ";
uchar code table1[]="    12-00-00    ";
void delay(uchar z)
{
	uchar x,y;
	for(x=0;x<z;x++)
		for(y=0;y<110;y++);
}

void write_com(uchar com)
{
	lcdrs=0;
	lcden=0;
	P0=com;
	delay(5);
	lcden=1;
	delay(5);
	lcden=0;	
}

void write_dat(uchar dat)
{
	lcdrs=1;
	lcden=0;
	P0=dat;
	delay(5);
	lcden=1;
	delay(5);
	lcden=0;	
}

void init()
{
	uchar i;
	lcden=0;
	lcdrw=0;
	write_com(0x38);
	write_com(0x0c);
	write_com(0x06);
	write_com(0x01);
	write_com(0x80);
	for(i=0;i<15;i++)
		{
			write_dat(table[i]);
			delay(5);
		}
	write_com(0x80+0x40);
	for(i=0;i<12;i++)
		{
			write_dat(table1[i]);
			delay(5);
		}
	TMOD=0x01;
	TH0=0xdc;
	TL0=0x00;
	EA=1;
	ET0=1;
	TR0=1;
}

void write_sfm(uchar add,uchar dat)
{
	uchar shi,ge;
	shi=dat/10;
	ge=dat%10;
	write_com(0x80+0x40+add);
	write_dat(0x30+shi);
	write_dat(0x30+ge);
}

void keyscan()
{
	if(shezhi==0)	
	{
			delay(5);
			if(shezhi==0)
			{	
				shezhinum++;
				while(!shezhi);
				if(shezhinum==1)
				{
					TR0=0;
					write_com(0x80+0x40+10);
				    write_com(0x0f);
				}
			}
			if(shezhinum==2)
			{
				write_com(0x80+0x40+7);
			}
			if(shezhinum==3)
			{
				write_com(0x80+0x40+4);
			}
			if(shezhinum==4)
			{
				shezhinum=0;
				write_com(0x0c);
				TR0=1;
			}

				
	}
		if(shezhinum!=0)
		{
			if(add==0)
			{
				delay(5);
				if(add==0)
				{
					while(!add);
					if(shezhinum==1)
					{
						miao++;
						if(miao==60)
							miao=0;
						write_sfm(10,miao);
						write_com(0x80+0x40+10);
						
						
					}
					if(shezhinum==2)
					{
						fen++;
						if(fen==60)
						fen=0;
						write_sfm(7,fen);
						write_com(0x80+0x40+7);
					}
					if(shezhinum==3)
					{
						shi++;
						if(shi==24)
							shi=0;
						write_sfm(4,shi);
						write_com(0x80+0x40+4);
					}
				}
			}
			if(dec==0)
			{
				delay(5);
				if(dec==0)
				{
					while(!dec);
					if(shezhinum==1)
					{
						miao--;
						if(miao==-1)
							miao=59;
						write_sfm(10,miao);
						write_com(0x80+0x40+10);
					}
					if(shezhinum==2)
					{
						fen--;
						if(fen==-1)
							fen=59;
						write_sfm(7,fen);
						write_com(0x80+0x40+7);
					}
					if(shezhinum==3)
					{
						shi--;
						if(shi==-1)
							shi=23;
						write_sfm(4,shi);
						write_com(0x80+0x40+4);
					}
				}
			}
		}
}
void main()
{
	init();
	SCON=0XFF;
	while(1)
	{
		keyscan();		
	}
}

void timer0() interrupt 1
{
	TH0=0xdc;
	count++;
	if(count==100)
		{
			count=0;
			miao++;
			write_sfm(10,miao);
			if(miao==60)
			{
				miao=0;
				fen++;
				write_sfm(7,fen);
				if(fen==60)
				{
					fen=0;
					shi++;
					write_sfm(4,shi);
					if(shi==24)
					{
						shi=0;
					}					
				}
			}
	
		}	
}