1602LCD简单时钟显示实验C语言

#include "reg51.h"
#define uchar unsigned char
sbit RW=P2^3;
sbit RS=P2^2;
sbit E=P2^4;
bit at=0;
//sbit busy_bit=P1^7;
uchar code shen[]={"CLOCK!"};
uchar code word[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x20};
uchar dispbuf[8],h,m,s,counter;



void delay()
{
uchar i;
for(i=0;i<255;i++);
}



/*******写命令**********/
void lcd_wmc(uchar i)
{

P0=i;
RS=0;
RW=0;
E=0;
delay();
E=1;
}



/*******写数据***********/

void lcd_wmd(uchar i)
{

P0=i;
RS=1;
RW=0;
E=0;
delay();
E=1;
}




/*******初始化液晶*******/
void lcd_init()
{
uchar i;
lcd_wmc(0x01);
lcd_wmc(0x38);
lcd_wmc(0x0c);
lcd_wmc(0x06);
lcd_wmc(0xc9);
for(i=0;i<6;i++)
lcd_wmd(shen[i]);
lcd_wmc(0xc0);
}





/*******更新缓冲区子程序*******/
void newbuf()
{
dispbuf[0]=s%10;
dispbuf[1]=s/10;
dispbuf[3]=m%10;
dispbuf[4]=m/10;
dispbuf[6]=h%10;
dispbuf[7]=h/10;
}



/*******显示子程序**********/
void disp(uchar dispadd)
{
uchar tmp;
lcd_wmc(dispadd);
tmp=dispbuf[7];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[6];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[5];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[4];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[3];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[2];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[1];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[0];
tmp=word[tmp];
lcd_wmd(tmp);
}





/*********************键盘子程序***********************/

uchar keypro(void)
{
uchar scanl,scanh;
P1=0xf0;
if((P3&0xf0)!=0xf0)
{
delay();
if((P1&0xf0)!=0xf0)
{
scanl=0xfe;
while((scanl&0x10)!=0)
{
P1=scanl;
if((P3&0xf0)!=0xf0)
{
scanh=(P1&0xf0)|0x0f;
return (~scanh)+(~scanl);
}
else scanl=(scanl<<1)|0x01;
}
}
}
return 0;
}


/********************时间调整子程序********************/
void adjustime()
{
uchar k;
static uchar add;
k=keypro();
switch(k)
{
case 0x88: if(!at){add=0xc1;EA=0;lcd_wmc(0xc1);lcd_wmc(0x0f);at=1;}
else {lcd_wmc(0xc0);lcd_wmc(0x0c);at=0;EA=1;} break;

case 0x48: if(at)
{
if(add==0xc1){add=0xc7; lcd_wmc(add);}
else {add=add-3;lcd_wmc(add);}
}
break;

case 0x28: if(at)
{
if(add==0xc7) {add=0xc1;lcd_wmc(add);}
else {add=add+3;lcd_wmc(add);}
}
break;

case 0x18: if(at)
{
if(add==0xc1) h++;
if(h==24)
h=0;
if(add==0xc4) m++;
if(m==60)
m=0;
if(add==0xc7) s++;
if(s==60)
s=0;
newbuf();
disp(0xc0);

lcd_wmc(add);
}
break;
default: break;
}
if(k!=0)
{
while((P3&0xf0)!=0xf0)
P1=0xf0;
}

}







/*********************初始化子程序**********************/
void init()
{

TMOD=0x01;
TH0=0x4c;
TL0=0x00;
EA=1;
ET0=1;
TR0=1;
counter=0;
h=12;m=0;s=0;
dispbuf[2]=10;
dispbuf[5]=10;
}







/***************************主程序************************/

void main(void)
{
init();
lcd_init();

while(1)
{
adjustime();
if(!at)
{
//闪烁
if(counter<10)
{
dispbuf[2]=10;
dispbuf[5]=10;
}
else
{
dispbuf[2]=11;
dispbuf[5]=11;
}
//更新显示缓冲区及调用显示程序
if(counter==0)
{
newbuf();
disp(0xc0);
}
else if(counter==10)
disp(0xc0);
}
}
}








/*************************定时器0的中断**********************/
void Time0() interrupt 1 using 2 //再次强调中断子程序执行时间越短越好
{
TH0=(65536-46075)/256;
TL0=(65536-46075)%256;
counter++;
if(counter==20)
{
s++;
counter=0;
if(s==60)
{
m++;
s=0;
if(m==60)
{
h++;
m=0;
if(h==24)
h=0;
}
}

}
}