#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
#define D P1 //段选
#define W P2 //位选
sbit IO=P3^3; //数据口
sbit SCLK=P3^4; //控制数据时钟
sbit RST=P3^2; //使能端、复位端
sbit w1=P2^4 ;
/************按键引脚定义***********/
sbit s1=P3^5; //按键 加
sbit s2=P3^6; //按键 减
sbit s3=P3^7; //按键 选择
sbit led=P2^3; //闪烁的小数点
uchar s, knum=0,snum,fnum;
bit flag;
/***********写时分秒地址************/
#define write_shi 0x84
#define write_fen 0x82
#define write_miao 0x80
/***********读时分秒地址************/
#define read_shi 0x85
#define read_fen 0x83
#define read_miao 0x81
bit miao_flag;
char miao_num;
char Dmiao;
char shi,fen,miao; //读出数据存储变量
uchar d[]={0Xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; //段选
void delay(uint z) //延时函数,z的取值为这个函数的延时ms数，如 delay(200);大约延时200ms.
{ //delay(500);大约延时500ms.
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void t0_init() //定时50ms一个中断
{
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
uchar read_1302(uchar add) //读函数
{
uchar i,date;
RST=0; //禁止读写数据
for(i=0;i<8;i++)
{
RST=1;
SCLK=0;
IO=add&0x01;
add>>=1;
SCLK=1;
}
for(i=0;i<8;i++)
{
if(IO)
date=date|0x80;
else
date=date|0x00;
SCLK=1;
date>>=1;
SCLK=0;
}
RST=0;
date=date/16*10+date%16;//进制转换 16转10进制
IO=0; //数据读完后，IO口必须为0，不然小时一直显示85
return date;
}
void write_1302(uchar add,uchar dat) //写函数
{
uchar i;
RST=0; //禁止读写数据
SCLK=0;
for(i=0;i<8;i++) //写地址
{
RST=1; //允许读写数据
SCLK=0;
IO=add&0x01;
add>>=1;
SCLK=1;
}
for(i=0;i<8;i++) //写数据
{
RST=1; //允许读写数据
SCLK=0;
IO=dat&0x01;
dat>>=1;
SCLK=1;
}
RST=0;
}
void init_1302() //初始化函数 设置时间
{
flag=read_1302(0x81);
if(flag&0x80)
write_1302(0x8e,0x00); //保护取消，可以进行读写操作
write_1302(write_miao,0x56);
write_1302(write_fen,0x49);
write_1302(write_shi,0x14);
write_1302(0x90,0xa5);
write_1302(0x8e,0x80); //保护启动，不能进行读写操作
}
void display(uchar shi,uchar fen) //显示函数
{
if(knum==0)
{
snum=30;
fnum=30;
}
if(knum==1)
{
fnum++;
snum=30;
}
if(knum==2)
{
snum++;
fnum=30;
}
if(snum>=30)
{
W=0x7F; //位选
s=d[shi/10];//段码先给s，判断其值是否为0，
if(s==0xc0)
{
W=0xff;
D=0xff;
}
D=s;//s不为零则给D，让其显示
delay(5);
D=0Xff; //消隐
if(miao_flag) //小数点闪烁
{
miao_flag=0;
W=0xbF;
D=d[shi%10];
delay(5);
D=0Xff; //消隐
W=0Xff;
}
else
{
W=0xbF;
D=d[shi%10];
delay(5);
D=0Xff;
W=0Xff;
}
if(snum==60)
snum=0;
}
if(fnum>=30)
{
W=0xdF;
D=d[fen/10];
delay(5);
D=0Xff;
W=0Xff; //消隐
W=0xeF;
D=d[fen%10];
delay(5);
D=0Xff;
W=0Xff; //消隐
if(fnum==60)
fnum=0;
D=0Xff;
W=0Xff;
}
}
void read_sf()
{
miao=read_1302(read_miao);
/*if(miao!=Dmiao)
{
Dmiao=miao;
TR0=1;
miao_flag=1;
} */
fen=read_1302(read_fen);
shi=read_1302(read_shi);
display(shi,fen);
}
void keyscan() //按键扫描函数
{
if(s3==0) //选择按键按下
{
delay(10);
if(s3==0)
{
while(!s3)
display(shi,fen); //加上这句，按键按下就不会闪
knum++;
if(knum==1) //分闪烁
{
write_1302(0x8e,0x00); //保护取消
write_1302(write_miao,0x80);
}
if(knum==3) //时钟启动
{
knum=0;
write_1302(write_miao,0x00);
write_1302(0x8e,0x80); //保护启动
}
}
}
if(knum==1) //分钟调节
{
if(s1==0) //加
{
delay(10);
if(s1==0)
{
while(!s1)
display(shi,fen); //加上这句，按键按下就不会闪
fen++;
if(fen==60)
fen=0;
write_1302(write_fen,fen/10*16+fen%10); //写入1302
// read_sf(); //读出时间，然后显示
}
}
if(s2==0)
{
delay(10);
if(s2==0)
{
while(!s2)
display(shi,fen); //加上这句，按键按下就不会闪
fen--;
if(fen==-1)
fen=59;
write_1302(write_fen,fen/10*16+fen%10);
read_sf();
}
}
}
if(knum==2)
{
if(s1==0)
{
delay(10);
if(s1==0)
{
while(!s1)
display(shi,fen); //加上这句，按键按下就不会闪
shi++;
if(shi==24)
shi=0;
write_1302(write_shi,shi/10*16+shi%10);
read_sf();
}
}
if(s2==0)
{
delay(10);
if(s2==0)
{
while(!s2)
display(shi,fen); //加上这句，按键按下就不会闪
shi--;
if(shi==-1)
shi=23;
write_1302(write_shi,shi/10*16+shi%10);
read_sf();
}
}
}
}
void main()
{
init_1302();
t0_init();
while(1)
{ if(miao_num<10)
led=0;
if(miao_num>=10)
led=1;
read_sf();
keyscan();
}
}
void t0_timer() interrupt 1
{
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
miao_num++;
if(miao_num>=25)
{
miao_num=0;
miao_flag=1;
}
}
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