1602.c

1602液晶的编写程序

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar code table[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};
uchar code table1[]="  :  :  ";
uchar code table2[]="    /  /  ";
int i,a,shi,fen,miao,year,month,day,r1,r2,k,num,temp;
sbit rs=P2^4;
sbit rw=P2^5;
sbit e=P2^6;
void delay(uint z)
{
    uint x,y;
    for (x=z;x>0;x--)
        for (y=125;y>0;y--);
}
void write_com(uchar com)
{
    rs=0;
    rw=0;
    P0=com;
    delay(5);
    e=1;
    delay(5);
    e=0;
}
void write_date(uchar date)
{
    rs=1;
    rw=0;
    P0=date;
    delay(5);
    e=1;
    delay(5);
    e=0;
}
void unit()
{
    TMOD=0x01;
    TH0=(65535-50000)/256;
    TL0=(65535-50000)%256;
    EA=1;
    ET0=1;
    TR0=1;
    shi=23;
    fen=59;
    miao=57;
    year=2009;
    month=12;
    day=31;
    k=0;
    write_com(0x3f);//功能设置
    write_com(0x01);//清屏
    write_com(0x0c);//显示开关控制
    write_com(0x06);//输入方式
    write_com(0x80+0x40+4);//指针
    for (i=0;i<8;i++)
    {
        write_date(table1[i]);
    }
    write_com(0x80+3);
    for (i=0;i<10;i++)
    {
        write_date(table2[i]);
    }
}
/*判定一个月有30天还是31天*/
void ye()
{
    switch (month)
    {
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    case 12:r1++;break;
    case 2:
    case 4:
    case 6:
    case 9:
    case 11:r2++;break;
    }
    if (r1==1)
    {
        r1=0;
        if (day==31)
        {
            day=1;
            if (month<11)
                month++;
        }
        else
            day++;
    }
    if (r2==1)
    {
        r2=0;
        if (day==30)
        {
            day=1;
            if (month==12)
            {
                month=1;
                year++;
            }

            else
                month++;
        }
        else
            day++;
    }

}
void write_add_date(uchar add,uchar date)
{
    write_com(0x80+add);
    write_date(date);
}
void write_com_com(uchar add,uchar com)
{
    write_com(0x80+add);
    write_com(com);
}
/*显示函数*/
void display()
{
    write_add_date(0x40+4,table[shi/10]);
    delay(5);
    write_add_date(0x40+5,table[shi%10]);
    delay(5);
    write_add_date(0x40+7,table[fen/10]);
    delay(5);
    write_add_date(0x40+8,table[fen%10]);
    delay(5);
    write_add_date(0x40+10,table[miao/10]);
    delay(5);
    write_add_date(0x40+11,table[miao%10]);
    delay(5);

    write_add_date(3,table[year/1000]);
    delay(5);
    write_add_date(4,table[year%1000/100]);
    delay(5);
    write_add_date(5,table[year%1000%100/10]);
    delay(5);
    write_add_date(6,table[year%10]);
    delay(5);
    write_add_date(8,table[month/10]);
    delay(5);
    write_add_date(9,table[month%10]);
    delay(5);
    write_add_date(11,table[day/10]);
    delay(5);
    write_add_date(12,table[day%10]);
}
void timer() interrupt 1
{
    TH0=(65535-50000)/256;
    TL0=(65535-50000)%256;
    a++;
    if (a==20)
    {
        a=0;
        if (miao==59)
        {
            miao=0;
            if (fen==59)
            {
                fen=0;
                if (shi==23)
                {
                    shi=0;
                    ye();
                }
                else
                    shi++;
            }
            else
                fen++;
        }
        else
            miao++;



    }

}

/*用键盘控制光标位置*/
key2()
{
    if (k==1)
    {
        write_com_com(0x40+11,0x0d);
        if (num!=20)                      /*num若等于20，则证明无键按下*/
        { 
            miao=((miao/10)*10+num);      /*将键盘值读入显示函数中，若没有这步，输入的键盘值将不被保存*/

        }

    }
    if (k==2)
    {
        write_com_com(0x40+10,0x0d);
        if (num!=20)
        {
            if (num>5)
            {
                miao=0;
                fen=0;
                shi=0;
            }
            else
                miao=((miao%10)+(num*10));
        }
    }
    if (k==3)
    {
        write_com_com(0x40+8,0x0d);
        if (num!=20)
        {
            fen=((fen/10)*10+num);

        }

    }
    if (k==4)
    {
        write_com_com(0x40+7,0x0d);
        if (num!=20)
        {
            if (num>5)
            {
                miao=0;
                fen=0;
                shi=0;
            }
            else
                fen=((fen%10)+(num*10));

        }
    }
    if (k==5)
    {
        write_com_com(0x40+5,0x0d);
        if (num!=20)
        {
            shi=((shi/10)*10+num);
        }
    }
    if (k==6)
    {
        write_com_com(0x40+4,0x0d);
        if (num!=20)
        {
            if (num>2)
            {
                miao=0;
                fen=0;
                shi=0;
            }
            else
                shi=((shi%10)+num*10);

        }
    }
    if (k==7)
    {
        write_com_com(12,0x0d);
        if (num!=20)
        {
            day=((day/10)*10+num);
        }
    }
    if (k==8)
    {
        write_com_com(11,0x0d);
        if (num!=20)
        {
            if (num>2)
            {
                year=0;
                month=0;
                day=0;
            }

            else
                day=((day%10)+num*10);
        }
    }
    if (k==9)
    {
        write_com_com(9,0x0d);
        if (num!=20)
        {
            month=((month/10)*10+num);
        }

    }
    if (k==10)
    {
        write_com_com(8,0x0d);
        if (num!=20)
        {
            if (num>1)
            {
                year=0;
                month=0;
                day=0;
            }
            month=((month%10)+num*10);
        }
    }
	if (k==11)
	{
		write_com_com(6,0x0d);
		if (num!=20)
		{
			year=(((year/10)*10)+num);
		}

	}
	if (k==12)
	{
		write_com_com(5,0x0d);
		if (num!=20)
		{
			year=((year/100)*100+(num*10)+(year%10));
		}

	}
	if (k==13)
	{
		write_com_com(4,0x0d);
		if (num!=20)
		{
            year=(((year/1000)*1000)+num*100+(year%100));
		}

	}
	if (k==14)
	{
		write_com_com(3,0x0d);
		if (num!=20)
		{
            year=num*1000+(year%1000);
		}

	}
	if(k==15)
	{
		TR0=1;
		k=0;
	}
	
}
/*键盘扫描函数*/
key3()
{
	P3=0x7f;
	temp=P3;
	temp=temp&0x0f;
	num=20;             /*num值要重新赋值*/
	while(temp!=0x0f)
	{
		delay(5);
		temp=P3;
		temp=temp&0x0f;
		while(temp!=0x0f)
		{
			temp=P3;
			switch(temp)
			{
				case 0x7e:  write_date(0x30);num=0;break;
				case 0x7d:  write_date(0x31);num=1;break;
				case 0x7b:  write_date(0x32);num=2;break;
				case 0x77:  write_date(0x33);num=3;break;
			}
			while(temp!=0x0f)
			{
				temp=P3;
				temp=temp&0x0f;
			}
		}
	}
	P3=0xbf;
	temp=P3;
	temp=temp&0x0f;
	while(temp!=0x0f)
	{
		delay(5);
		temp=P3;
		temp=temp&0x0f;
		while(temp!=0x0f)
		{
			temp=P3;
			switch(temp)
			{
				case 0xbe: write_date(0x34);num=4;break;
				case 0xbd: write_date(0x35);num=5;break;
				case 0xbb: write_date(0x36);num=6;break;
				case 0xb7: write_date(0x37);num=7;break;
			}
			while(temp!=0x0f)
			{
				temp=P3;
				temp=temp&0x0f;
			}
		}
	}
	P3=0xdf;
	temp=P3;
	temp=temp&0x0f;
	while(temp!=0x0f)
	{
		delay(5);
		temp=P3;
		temp=temp&0x0f;
		while(temp!=0x0f)
		{
			temp=P3;
			switch(temp)
			{
				case 0xde: write_date(0x38);num=8;break;
				case 0xdd: write_date(0x39);num=9;break;
				case 0xdb: TR0=0;k++;break;
			}
			while(temp!=0x0f)
			{
				temp=P3;
				temp=temp&0x0f;
			}
		}
	}
	return(num);
	
}
 main()
{

    unit();
    while (1)
    {
	    if(k==0)
		{
			display();
		}
		key3();
		key2(); 
		
	
     }
}