电子时钟扩展.c

很实用的单片机例程

#include<reg52.h>
#include"lcd1602.h"
#include"ds1302.h"
#include"ds18b20.h"

#define uint unsigned int
#define uchar unsigned char

uint b[6];
//年月日时分秒

uchar code row1[]={"2009-01-01"};
uchar code row2[]={"00:00:00"};
uchar year1[12]={31,28,31,30,31,30,31,31,30,31,30,31};//平年
uchar year2[12]={31,29,31,30,31,30,31,31,30,31,30,31};//润年
uchar j[6]={0x85,0x88,0x8b,0x84+0x40,0x87+0x40,0x8a+0x40};//LCD地址

uchar i,k,jj=0,w,clock=0,bigclock=0,c=0,num;
//i循环数  k温度缓存 jj地址位
uint temp;

sbit b1=P3^0;//设置
sbit b2=P3^1;//上调
sbit b3=P3^2;//下调
sbit b4=P3^3;//转换
sbit b5=P3^4;//闹钟
sbit speaker=P3^5;

lcdscan()
{
	for(i=0;i<6;i++)
	{
		lcdwrite(j[i]);
		lcdshuju(a[11-i*2]+0x30);
		lcdwrite(j[i]+0x01);
		lcdshuju(a[10-i*2]+0x30);
	}
}

void key()
{
	if(b1==0)
	{
		dsaddshuju(0x80,(a[1]<<4)+a[0]+0x80);
		while(b1==0)
		{
			for(i=0;i<6;i++)
			{
				b[i]=a[11-i*2+clock]*10+a[10-i*2+clock];
			}

			if(b4==0)
			{
				delay(3);
				jj++;
				if(jj==6)
				{
					jj=0;
				}
			}
			if(b2==0)
			{
				delay(3);
				b[jj]++;
				if(b[5]==60)b[5]=0;
				if(b[4]==60)b[4]=0;
				if(b[3]==24)b[3]=0;
				if((b[0]%4==0 && b[0]%100!=0) || b[0]%400==0){if(b[2]>year2[b[1]-1])b[2]=1;}
				else {if(b[2]>year1[b[1]-1])b[2]=1;}
				if(b[1]==13)b[1]=1;
				if(b[0]==100)b[0]=0;
				
			}
			if(b3==0)
			{
				delay(3);
				b[jj]--;
				if(b[5]==-1)b[5]=59;
				if(b[4]==-1)b[4]=59;
				if(b[3]==-1)b[3]=23;
				if((b[0]%4==0 && b[0]%100!=0) || b[0]%400==0){if(b[2]<=0)b[2]=year2[b[1]-1];}
				else {if(b[2]<=0)b[2]=year1[b[1]-1];}
				if(b[1]==0)b[1]=12;
				if(b[0]==-1)b[0]=99;
			}

			for(i=0;i<6;i++)
			{
				a[11-i*2+clock]=b[i]/10;
				a[10-i*2+clock]=b[i]%10;
			}

			lcdwrite(j[jj]);
			lcdshuju(0);
			lcdwrite(j[jj]+1);
			lcdshuju(0);
			delay(200);
			lcdwrite(j[jj]);
			lcdshuju(a[11-2*jj+clock]+0x30);
			lcdwrite(j[jj]+1);
			lcdshuju(a[10-2*jj+clock]+0x30);
			delay(200);
			
			if(b1==1)
			{
				dsaddshuju(0x80,(a[1]<<4)+a[0]);
				dson();
			}
			if(b5==0)clock=12;
		}
	}
}

void main()
{	
	speaker=0;
	lcdrw=0;
	dson();
	lcdon();
	lcdwrite(0x83);
	for(i=0;i<10;i++)
	{
		lcdshuju(row1[i]);
		delay(1);
	}
	lcdwrite(0x84+0x40);
	for(i=0;i<8;i++)
	{
		lcdshuju(row2[i]);
		delay(1);
	}
	dsrst=0;
	dssclk=0;
	while(1)
	{
		for(i=0;i<5;i++)
		{
			dsrst=1;
			dswrite(0x81+i*2);
			k=dsread();
			dsrst=0;
			a[i*2]=k&0x0f;
			a[i*2+1]=(k>>4)&0x0f;			
		}
		dsrst=1;
		dswrite(0x8d);
		k=dsread();
		dsrst=0;
		a[10]=k&0x0f;
		a[11]=(k>>4)&0x0f;
		
		delay(100);

		lcdscan();
		key();
		if(b5==0)
		{
			for(i=0;i<12;i++)
			{
				if(a[i+12]==a[i])num++;
			}
			if(num==12)bigclock=1;
			else num=0;
			lcdwrite(0x8e);
			lcdshuju('&');
		}
		else 
		{
			lcdwrite(0x8e);
			lcdshuju(0x00);
		}	
		if(bigclock==1)
		{
			speaker=1;
			c++;
			if(c==100){bigclock=0;speaker=0;}
		}
		temp=readtemperature();//temp是uint型的。不然会出现温度到25后回00的现象。可能是由于十六进制与十进制的差异。
		lcdwrite(0x8d+0x40);
		lcdshuju(temp/100+0x30);
		lcdwrite(0x8e+0x40);
		lcdshuju(temp/10%10+0x30);
	}
}