基于51单片机控制的简易时钟(内部定时器)

若需要仿真图+程序（Q：409975690）附程序：#include

#define uint unsigned int

#define uchar unsigned char

uchar n,fen,miao,shi,ri ,yue;

uint a;

sbit lcden=P2^1;

sbit lcdrs=P2^0;

sbit k1=P1^0;

sbit k2=P1^2;

sbit k3=P1^5;

sbit k4=P1^6;

sbit k5=P1^7;

void keyscan();

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void write_comd(uchar com)

{

lcdrs=0;

P0=com;

delay(5);

lcden=1;

delay(5);

lcden=0;

void write_date (uchar date) {

lcdrs=1;

P0=date;

delay(5);

lcden=1;

delay(5);

lcden=0;

}

void start()

{

write_comd(0x38);

write_comd(0x0c);

write_comd(0x06);

write_comd(0x01);

}

void write_sfm()

{

write_comd(0x80+0x44); write_date(0x30+shi/10); write_comd(0x80+0x45); write_date(0x30+shi%10); write_comd(0x80+0x46); write_date(0x3A);

write_comd(0x80+0x47); write_date(0x30+fen/10); write_comd(0x80+0x48); write_date(0x30+fen%10); write_comd(0x80+0x49); write_date(0x3A);

write_comd(0x80+0x4a); write_date(0x30+miao/10); write_comd(0x80+0x4b); write_date(0x30+miao%10); }

void write_nyr()

{

write_comd(0x80);

write_date('M');

write_comd(0x80+0x01); write_date('T');

write_comd(0x80+0x02); write_date('Z');

write_comd(0x80+0x03); write_date('X');

write_comd(0x80+0x04); write_date(0x3A);

write_comd(0x80+0x05); write_date(0x30+0x02); write_comd(0x80+0x06); write_date(0x30+0x00); write_comd(0x80+0x07); write_date(0x30+0x01); write_comd(0x80+0x08); write_date(0x30+0x08); write_comd(0x80+0x09); write_date(0X2d);

write_comd(0x80+0x0a); write_date(0x30+yue/10); write_comd(0x80+0x0b); write_date(0x30+yue%10); write_comd(0x80+0x0c); write_date(0x2d);

write_comd(0x80+0x0d); write_date(0x30+ri/10); write_comd(0x80+0x0e); write_date(0x30+ri%10); }

void init_time0()

{

TMOD=0X01;

TH0=(655356-50000)/256; TL0=(655356-50000)%256; EA=1;

ET0=1;

TR0=1;

}

void main()

{yue=6;

ri=29;

shi=23;

fen=59;

start();

miao=0;

init_time0();

while(1)

{

keyscan();

write_sfm();

write_nyr();

}

}

void t0() interrupt 1

{

TH0=(655356-50000)/256; TL0=(655356-50000)%256; a++;

if(a==20)

{

a=0;

miao++;

if(miao==60)

{

miao=0;

fen++;

if(fen==60)

{

fen=0;

shi++;

if(shi==24)

shi=0;

ri++;

if(ri==30)

{

ri=1;

yue++;

if(yue==12)

yue=1;

}

}

}

}

}

void keyscan()

{

uchar flag;

if(k1==0)

{

delay(1);

if(k1==0)

{

while(!k1);

TR0=~TR0;

flag=~flag;

}

}

if(flag)

{

if(k2==0)

{

delay(1);

if(k2==0)

{

while(!k2);

fen++;

if(fen==60)

{

fen=0;

shi++;

}

}

}

if(k3==0)

{

delay(1);

if(k3==0)

{

while(!k3);

fen--;

if(fen==0)

fen=59;

}

}

if(k4==0)

{

delay(1);

if(k4==0)

{

while(!k4);

shi++;

if(shi==24)

shi=0;

}

}

if(k5==0)

{

delay(1);

if(k5==0)

{

while(!k5);

shi--;

if(shi==0)

shi=23;

}

}

}

}