液晶顯示的時鐘（初級版，不包括年月日）

#include

#include

#define uchar unsigned char

#define uint unsigned int

sbit lcden = P2^6;//這幾個端口要和硬件電路先聯(lián)系

sbit lcdrw = P2^5;

sbit lcdrs = P2^4;

sbit dula = P3^1;

sbit wela = P3^2;

sbit key1 = P3^5;

sbit key2 = P3^6;

sbit key3 = P3^7;

uchar code table[]=" 2013-10-01";

uchar code table1[]=" 23:59:53";

uchar miao,fen,shi;

uint num,key1num;

void delay(uint z)

{

uint x,y;

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

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

}

void write_com(uchar com)//寫命令函數(shù)

{

lcdrs = 0;//使能端置0低脈沖寫指令，高脈沖寫數(shù)據(jù)

_nop_();//推遲一個機器周期

lcdrw = 0;//低電平往里面寫數(shù)據(jù)

P0= com;

delay(5);

lcden = 1;//使能端給一個高電平讀走數(shù)據(jù)

delay(5);

lcden = 0;//使能端給一個低電平回位

}

void write_date(uchar date)//寫數(shù)據(jù)函數(shù)

{

lcdrs = 1;//使能端置0低脈沖寫指令，高脈沖寫數(shù)據(jù)

_nop_();//推遲一個機器周期

lcdrw = 0;

P0= date;

delay(5);

lcden = 1;

delay(5);

lcden = 0;

}

void init()

{

dula = 0;

wela = 0;//關閉數(shù)碼管

fen = 59;

miao = 53;

shi = 23;

lcden = 0;

write_com(0x38);//顯示模式設置

write_com(0x0c);//顯示開關以及光標設置

write_com(0x06);

write_com(0x80);

for(num=0;num<13; num++)

{

write_date(table[num]);

delay(5);

}

write_com(0x80+0x40);//設置數(shù)據(jù)指針

for(num=0;num<12; num++)

{

write_date(table1[num]);

delay(5);

}

TMOD = 0x02;

TH0 = 6;

TL0 = 6;

EA = 1;

ET0 = 1;

TR0 = 1;

key1num = 0;

}

void write_sfm(uchar date,uchar addr)

{

uchar gw,sw;

gw = date%10;

sw = date/10;

write_com(0x80+0x40+addr);

write_date(0x30+sw);

write_date(0x30+gw);

}

void key_scan()

{

P3 = 0xff;

if(key1==0)

{

delay(5);

if(key1 == 0)

{

while(!key1);

key1num++;

if(key1num==1)

{

TR0 = 0;

write_com(0x80+0x40+11);

write_com(0x0f);

}

if(key1num == 2)

{

write_com(0x80+0x40+8);

write_com(0x0f);

}

if(key1num == 3)

{

write_com(0x80+0x40+5);

write_com(0x0f);

}

if(key1num == 4)

{

key1num=0;

TR0 = 1;

write_com(0x0c);

}

}

}

if(key2==0)

{

delay(5);

if(key2==0)

{

while(!key2);

if(key1num!=0)

{

switch(key1num)

{

case 1:

{

miao++;

if(miao == 60)

{

miao = 0;

}

write_sfm(miao,10);

write_com(0x80+0x40+11);

break;

}

case 2:

{

fen++;

if(fen == 60)

{

fen = 0;

}

write_sfm(fen,7);

write_com(0x80+0x40+8);

break;

}

case 3:

{

shi++;

if(shi == 24)

{

shi = 0;

}

write_sfm(shi,4);

write_com(0x80+0x40+5);

break;

}

}

}

}

}

if(key3==0)

{

delay(5);

if(key3==0)

{

while(!key3);

if(key1num!=0)

{

switch(key1num)

{

case 1:

{

miao--;

if(miao == 0)