DS1302加备用电池，掉电走时问题

ID:140489 · 发表于 2017-1-19 15:35

DS1302实时时钟，加了调时功能，仿真实物都通过，现在想加一个掉电走时的功能，试了好多方法都不行，
把1302初始化‘init_1302(); ’这句注释掉，再把程序烧进去，掉电虽然不会初始化时间，但1302不会继续走时，时间就
停在掉电那个时候的时间，在上电只能接着掉电那个时候的时间走时

/*********************************************************************************
DS1302实时时钟，加了调时功能，仿真实物都通过
**********************************************************************************/
#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int

//#define W P0       //位选
//#define D P0 //段选

/*sbit IO=P1^1;       //数据口
sbit SCLK=P1^0;      //控制数据时钟
sbit RST=P1^2;       //使能端、复位端 */


sbit sclk = P1^0;
sbit dio = P1^1;
sbit ce = P1^2;
sbit wela = P2^7;
sbit dula = P2^6;

sbit s1=P3^0; //按键加
sbit s2=P3^1; //按键减
sbit s3=P3^3; //按键选择
bit flag;//是否读取时间的标志位

char knum=0,snum,fnum;

char shi,fen,miao;

bit miao_flag;
uchar miao_num,ss;

/***********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
uchar d[]={ 0x3F,  //"0"
            0x06,  //"1"
            0x5B,  //"2"
            0x4F,  //"3"
            0x66,  //"4"
            0x6D,  //"5"
            0x7D,  //"6"
            0x07,  //"7"
            0x7F,  //"8"
            0x6F}; //共阴不带小数点

uchar dd[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef
};// 共阴带小数点

//uchar dd[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10}; //共阳带小数点

//uchar d[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xd8,0x80,0x90}; //共阳不带小数点
//uchar dd[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10}; //共阳带小数点    */

void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=120;y>0;y--);
}

/*uchar code table[]={

            0x3F,  //"0"
            0x06,  //"1"
            0x5B,  //"2"
            0x4F,  //"3"
            0x66,  //"4"
            0x6D,  //"5"
            0x7D,  //"6"
            0x07,  //"7"
            0x7F,  //"8"
            0x6F,  //"9"
            0x77,  //"A"
            0x7C,  //"B"
            0x39,  //"C"
            0x5E,  //"D"
            0x79,  //"E"
            0x71,  //"F"
            0x76,  //"H"
            0x38,  //"L"
            0x37,  //"n"
            0x3E,  //"u"
            0x73,  //"P"
            0x5C,  //"o"
            0x40,  //"-"
            0x00,  //熄灭
            0x00  //自定义

                     };
void display(uchar shi10,shi,fen10,fen,miao10,miao)
{
dula=1;
P0=table[shi10];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delay(1);

dula=1;
P0=table[shi]|0x80;    //    table[shi]|0x80， table[shi]或0x80就可以显示小数点
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delay(1);

dula=1;
P0=table[fen10];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delay(1);

dula=1;
P0=table[fen]|0x80;
dula=0;
P0=0xff;
wela=1;
P0=0xf7;
wela=0;
delay(1);

dula=1;
P0=table[miao10];
dula=0;
P0=0xff;
wela=1;
P0=0xef;
wela=0;
delay(1);

dula=1;
P0=table[miao];
dula=0;
P0=0xff;
wela=1;
P0=0xdf;
wela=0;
delay(1);
}  */

void t0_init()  //定时50ms一个中断
{

  TMOD=0X01;
  TH0=(65536-45872)/256;
  TL0=(65536-45872)%256;
  EA=1;
  ET0=1;
  TR0=1;

}

void temer1() interrupt 1
{
  TH0=(65536-45872)/256;
  TL0=(65536-45872)%256;
  ss++;
  if(ss==20)
  ss=0;

}

void display(uchar shi,uchar fen,uchar miao)    //显示函数
{
// if(miao%2==0)
if(ss<=10)    // 这里写为ss<=10，第三位数码管显示“— ”闪烁与第六位数码管显示“= ”
{    //闪烁相反，一个亮时，另一个灭
      wela=1;
P0=0xfb;
wela=0;

dula=1;
// P0=0x40;    //第三位数码管显示“— ”

P0=0x09;    //第三位数码管显示“= ”
dula=0;
P0=0xff;
delay(1);

}

else
{
wela=1;
P0=0xfb;
wela=0;

dula=1;
P0=0;    //第三位数码管不显示
dula=0;
P0=0xff;
delay(1);
}

// if(miao%2==0)    //if(miao%2==0) 1秒闪烁1次
if(ss>=10)    //if(ss>=10)闪烁频率可调
{
wela=1;
P0=0xdf;
wela=0;
dula=1;
P0=0x40;    //第六位数码管显示“— ”
dula=0;
P0=0xff;

delay(1);
}

else
{
wela=1;
P0=0xdf;
wela=0;
dula=1;
P0=0;    //第六位数码管不显示
dula=0;
P0=0xff;

delay(1);
}

if(knum==0)
{
snum=30;
fnum=30;
}

if(knum==1)
{
fnum++;
snum=30;
}

if(knum==2)
{
snum++;
fnum=30;
}

if(snum>=30)
{
if((shi/10)<1)    //如果小时十位小于1，
{
wela=1;
P0=0xfe;
wela=0;

dula = 1;
P0=0xff;    // 小时十位就不显示
dula = 0;
}

else
{
wela=1;
P0=0xfe;
wela=0;

dula=1;
P0=d[shi/10];
dula=0;
P0=0xff;
delay(1);
}

   /*  if(miao%2==0) //小数点闪烁
{
wela=1;
P0=0xfd;
wela=0;

dula=1;
P0=d[shi%10];    //时的个位，P0=d[shi%10]时的个位小数点不亮
dula=0;    //时的个位，P0=dd[shi%10]时的个位小数点亮
P0=0xff;
delay(1);

}  */

// else
// {
wela=1;
P0=0xfd;
wela=0;

dula=1;
P0=d[shi%10]; //时的个位，P0=d[shi%10]时的个位小数点闪烁
dula=0; // 时的个位，P0=dd[shi%10]时的个位小数点不闪烁
P0=0xff;
delay(1);

// }


if(snum==60)
snum=0;
}

if(fnum>=30)
{
wela=1;
P0=0xf7;
wela=0;

dula=1;
P0=d[fen/10];
dula=0;
P0=0xff;
delay(1);

wela=1;
P0=0xef;
wela=0;

dula=1;
P0=d[fen%10];
dula=0;
P0=0xff;
delay(1);

if(fnum==60)
fnum=0;
}
wela=1;
P0=0xbf;
wela=0;

      dula=1;
P0=d[miao/10];    //秒十位
dula=0;
P0=0xff;
delay(1);

wela=1;
P0=0x7f;
wela=0;

dula=1;
P0=d[miao%10];    //秒个位
dula=0;
P0=0xff;
delay(1);

}

void write_1302(uchar add,dat)    //写函数  qx
{
uchar i,temp;
temp=add;
ce=0;
_nop_();
sclk=0;
_nop_();
ce=1;
_nop_();
for(i=0;i<8;i++)
{
sclk=0;
_nop_();
if((temp&0x01)==0x01)
dio=1;
else
dio=0;
temp>>=1;
sclk=1;
_nop_();
}
temp=dat;
for(i=0;i<8;i++)
{
sclk=0;
_nop_();
if((temp&0x01)==0x01)
dio=1;
else
dio=0;
temp>>=1;
sclk=1;
_nop_();
}
ce=0;
sclk=0;
}
uchar read_1302(uchar add)    //读函数 qx
{
uchar dat,dat1,i,temp;
temp=add;
ce=0;
_nop_();
sclk=0;
_nop_();
ce=1;
for(i=0;i<8;i++)
{
sclk=0;
_nop_();
if((temp&0x01)==0x01)
dio=1;
else
dio=0;
temp>>=1;
sclk=1;
_nop_();
}
for(i=0;i<8;i++)
{
sclk=0;
_nop_();
if(dio)
      dat|=0x80;
if(i<7)
dat>>=1;
sclk=1;
}
dat1=dat/16;
dat=dat%16;
dat=dat1*10+dat;
ce=0;
sclk=0;
return dat;
}

void init_1302() //初始化函数设置时间
{
write_1302(0x8e,0x00); //保护取消，可以进行读写操作
write_1302(write_miao,0x57);
write_1302(write_fen,0x55);
write_1302(write_shi,0x15);
write_1302(0x8e,0x80); //保护启动，不能进行读写操作
}

void read_sf()
{
shi=read_1302(read_shi);
fen=read_1302(read_fen);
miao=read_1302(read_miao);
display(shi,fen,miao);
}

void keyscan()    //按键扫描函数
{
if(s3==0)    //选择按键按下
{
delay(10); //延时
if(s3==0)
{
while(!s3) //松手检测
display(shi,fen,miao); //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); //  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,miao); //加上这句，按键按下就不会闪
fen++;
fen=fen/10*16+fen%10; //转为16进制
if(fen==0x60)
fen=0x00;
write_1302(write_fen,fen); //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,miao); //加上这句，按键按下就不会闪
fen--;
fen=fen/10*16+fen%10; //转为16进制
if(fen==-1)
fen=0x59;
write_1302(write_fen,fen);
read_sf();
}
}

}

if(knum==2)
{
if(s1==0)
{
delay(10);
if(s1==0)
{
while(!s1)
display(shi,fen,miao); //加上这句，按键按下就不会闪
shi++;
shi=shi/10*16+shi%10; //转为16进制
if(shi==0x24)
shi=0x00;
write_1302(write_shi,shi);
read_sf();
}
}
if(s2==0)
{
delay(10);
if(s2==0)
{
while(!s2)
   display(shi,fen,miao); //加上这句，按键按下就不会闪
shi--;
shi=shi/10*16+shi%10; //转为16进制
if(shi==-1)
shi=0x23;
write_1302(write_shi,shi);
read_sf();
}
}
}
}

void main()
{
t0_init();
init_1302();
while(1)
{

      read_sf();

      keyscan();
write_1302(0x8e,0x00);

shi=read_1302(0x85);

fen=read_1302(0x83);

miao=read_1302(0x81);
write_1302(0x8e,0x00);

display(shi,fen,miao);

}

}