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#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit rs=P2^0; //定義液晶顯示器控制端口
sbit rw=P2^1;
sbit en=P2^2;
sbit s1=P1^0; //定義按鍵控制
sbit s2=P1^1;
sbit s3=P1^2;
sbit s4=P1^3;
uchar shi,fen,miao,ri,yue,nin;
uchar code table[]={" clock"};
uchar code table1[]={" 00:00:57"};
uchar num,num1,count;
uint i,sh,ge,s,g;
void delay(uchar time) //延時(shí)
{
uint j;
for(;time>0;time--)
for(j=0;j<125;j++);
}
void write_com(uchar com) //寫指令函數(shù)
{
en=0;
rs=0;
delay(5);
P0=com;
delay(5);
en=1;
delay(5);
en=0;
}
void write_data(uchar dat) //寫數(shù)據(jù)函數(shù)
{
en=0;
rs=1;
delay(5);
P0=dat;
delay(5);
en=1;
delay(5);
en=0;
}
void init() //初始化
{
en=0;
rw=0;
write_com(0x38);//設(shè)置16X2顯示,5X7點(diǎn)陣,8位數(shù)據(jù)接口
write_com(0x0c);//設(shè)置開顯示，不顯示光標(biāo)
write_com(0x06);//寫一個(gè)字符后地址指針加1
write_com(0x01);//顯示清零，數(shù)據(jù)指針清零
for(i=0;i<(sizeof(table)-1);i++) //第一行寫
{
write_com(0x80+i);
write_data(table[i]);
}
for(i=0;i<(sizeof(table1)-1);i++) //第二行寫
{
write_com(0x80+0x40+i);
write_data(table1[i]);
}
miao=56;
fen=59;
shi=23;
TMOD=0x01; //time0作為定時(shí)器工作在模式1下
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
EA=1; //開啟總中斷
ET0=1; //開啟time0中斷
TR0=1; //啟動(dòng)time0
}
void write_sfm(uchar add,uchar num) //時(shí)分秒函數(shù)
{
sh=num/10; //分離出十位
ge=num; //分離出個(gè)位
write_com(0x80+0x40+add); //第二行數(shù)據(jù)指針位置調(diào)整
write_data(0x30+sh); //更改顯示數(shù)據(jù)的十位
write_data(0x30+ge); //更改顯示數(shù)據(jù)的個(gè)位
}
void timer0() interrupt 1 //time0中斷
{
TH0=(65536-50000)/256; //重裝初始值
TL0=(65536-50000)%6;
count++;
if(count==20) //20次到則滿一秒
{
count=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
write_sfm(4,shi);
}
write_sfm(7,fen);
}
write_sfm(10,miao);
}
}
void keyscan() //鍵盤掃描
{ if(s1==0) //按下S1
{
delay(5);
if(s1==0)
{
num1++;
while(!s1);//等待釋放
if(num1==1)
{
TR0=0;
write_com(0x0e); //顯示光標(biāo)，不閃爍
write_com(0x80+0x40+0x0b); //數(shù)據(jù)指針移動(dòng)到秒的個(gè)位處
write_com(0x0f);//顯示光標(biāo)，閃爍
}
if(num1==2)
{
write_com(0x80+0x40+0x08); //數(shù)據(jù)指針移到到分鐘的個(gè)位處
}
if(num1==3)
{
write_com(0x80+0x40+0x05); //數(shù)據(jù)指針移到到小時(shí)的個(gè)位處
}
if(num1==4)
{
num1=0; //清零
write_com(0x0c); //重新顯示
TR0=1; //重新啟動(dòng)計(jì)時(shí)
}
}
}
if(num1!=0) //按下S2則選擇時(shí)/分/秒加1
{
if(s2==0)
{
delay(5);
if(s2==0)
{
while(!s2);
if(num1==1)
{
delay(20);
miao++;
if(miao==60)
miao=0;
write_sfm(10,miao);
write_com(0x80+0x40+0x0a);
}
if(num1==2)
{
fen++;
if(fen==60)
fen=0;
write_sfm(7,fen);
write_com(0x80+0x40+0x07);
}
if(num1==3)
{
shi++;
if(shi==24)
shi=0;
write_sfm(4,shi);
write_com(0x80+0x40+0x04);
}
}
}
}
if(num1!=0)
if(s3==0) //按下S3則選擇時(shí)/分/秒 減1
{
delay(5);
if(s3==0)
{
while(!s3);
if(num1==1)
{
delay(20);
miao--;
if(miao==-1)
miao=59;
write_sfm(10,miao);
write_com(0x80+0x40+0x0a);
}
if(num1==2)
{
fen--;
if(fen==-1)
fen=59;
write_sfm(7,fen);
write_com(0x80+0x40+0x07);
}
if(num1==3)
{
shi--;
if(shi==-1)
shi=23;
write_sfm(4,shi);
write_com(0x80+0x40+0x04);
}
}
}
if(num1!=0)
if(s4==0) //確定按鍵
{
delay(5);
if(s4==0)
{
while(!s4);
num1=0; //清零
write_com(0x0c); //重新顯示
TR0=1; //重新啟動(dòng)計(jì)時(shí)
}
}
}
void main()
{
init();
while(1)
{
keyscan();
}
}
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捕獲.PNG
(88.34 KB, 下載次數(shù): 39)
下載附件
2017-11-19 16:16 上傳
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