1.c

液晶屏计时器程序

#include<reg52.h>
#define uchar unsigned char 
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
sbit rs=P3^5;
sbit lcden=P3^4;
uchar count,s1num;
char miao,shi,fen;
uchar code table[]="  2007-7-30 MON";
uchar code table1[]="    00:00:00";
void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}

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

void write_date(uchar date)
{
	rs=1;
	lcden=0;
	P0=date;
	delay(5);
	lcden=1;
	delay(5);
	lcden=0;	
}

void init()
{
	uchar num;
	dula=0;
	wela=0;
	lcden=0;
	write_com(0x38);
	write_com(0x0c);
	write_com(0x06);
	write_com(0x01);
	write_com(0x80);
	for(num=0;num<15;num++)
		{
			write_date(table[num]);
			delay(5);
		}
	write_com(0x80+0x40);
	for(num=0;num<12;num++)
		{
			write_date(table1[num]);
			delay(5);
		}
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;
}

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

void main()
{
	init();
	while(1)
 	{
		if(count==20)
		{
			count=0;
			miao++;
			if(miao==60)
			{
				miao=0;
				fen++;
				if(fen==60)
				{
					fen=0;
					shi++;
					if(shi==24)
					{
						shi=0;
					}
					write_sfm(4,shi);
				}
				write_sfm(7,fen);
			}
			write_sfm(10,miao);
		}
 	}	 
}

void timer0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	count++;
}