DS1302数字钟程序哪里有错？困扰了好几天了，望高手指教-yatoo的回答

DS1302数字钟程序哪里有错？困扰了好几天了，望高手指教

2019-07-16 03:09发布

站内问答 / 51单片机

16641 5

DS1302数字钟程序哪里有错？刚开始显示正常，一按按钮值就回不来了，求解
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit rs=P2^5; //LCD1602
sbit rw=P2^6;
sbit en=P2^7;
sbit sclk=P1^6;  //DS1302
sbit ds1302_io=P3^5;
sbit rst=P1^7;
sbit s1=P3^2;  //KEY
sbit s2=P3^3;
sbit s3=P3^4;
uchar code table1[]=" 20  -  -    ";
uchar code table2[]=" :  :  ";
uchar a,miao,shi,fen,day,month,year,week,flag,s1num,value;
void delay(uint z);
void write_ds1302(uchar command,uchar value);
//sbit ACC0=ACC^0;
//sbit ACC7=ACC^7;
void write_com(uchar com)
{
rs=0;
rw=0;
P0=com;
delay(5);
en=1;
delay(5);
en=0;
}
void write_data(uchar date)
{
rs=1;
rw=0;
P0=date;
delay(5);
en=1;
delay(5);
en=0;
}
void init()
{
  uchar num;
  /*TMOD=0x11;
  TH0=0;
  TL0=0;
  EA=1;
  ET0=1;
  TR0=1;*/
  en=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
for(num=0;num<15;num++)
   {
write_data(table1[num]);
delay(5);
}
write_com(0x80+0x40);
  for(num=0;num<10;num++)
   {
write_data(table2[num]);
delay(5);
}
}
void write_nyr(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+add);
write_data(0x30+shi);
write_data(0x30+ge);
}
void write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_data(0x30+shi);
write_data(0x30+ge);
}
/*void write_temp(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_data(0x30+shi);
write_data(0x30+ge);
write_data(0xdf);
write_data(0x43);
} */
void write_week(uchar week)
{
write_com(0x80+12);
switch(week)
  {
case 1:write_data('M');delay(5);
         write_data('O');delay(5);
         write_data('N');
         break;
case 2:write_data('T');delay(5);
         write_data('U');delay(5);
         write_data('E');
         break;
case 3:write_data('W');delay(5);
         write_data('E');delay(5);
         write_data('D');
         break;
case 4:write_data('T');delay(5);
         write_data('H');delay(5);
         write_data('U');
         break;
   case 5:write_data('F');delay(5);
         write_data('R');delay(5);
         write_data('I');
         break;
   case 6:write_data('S');delay(5);
         write_data('A');delay(5);
         write_data('T');
         break;
   case 7:write_data('S');delay(5);
         write_data('U');delay(5);
         write_data('N');
         break;
  }
}
void ds1302_init()
{
rst=0;
sclk=0;
write_ds1302(0x8e,0x00);
  write_ds1302(0x8e,0x80);
}
void write_ds1302(uchar command,uchar value)
{
uchar i=0;
rst=0;
sclk=0;
rst=1;
  for(i=0;i<8;i++)
{
ds1302_io=command&0x01;
sclk=0;
sclk=1;
command>>=1;
}
for(i=0;i<8;i++)
{
ds1302_io=value&0x01;
sclk=0;
sclk=1;
value>>=1;
}
}
uchar read_ds1302(uchar command)
{
uchar i=0;
uchar value=0;
rst=0;
sclk=0;
rst=1;
  for(i=0;i<8;i++)
{
ds1302_io=command&0x01;
sclk=0;
sclk=1;
command>>=1;
}
for(i=0;i<8;i++)
{
sclk=1;
sclk=0;
if(ds1302_io)
   {
  value|=0x01<<i;
  }
}
rst=0;
//value = (value /16 * 10) + value %16;
  return value;

}
void keyscan()
{
if(s1==0)                //功能键按下
{
   delay(5);
   if(s1==0)
      {
      s1num++;

            flag=1;
            while(!s1);
         if(s1num==1)
            {
            // TR0=0;
            write_com(0x80+0x40+8);  //miao
            write_com(0x0f);
   value=(miao)/10*16+(miao)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x80,0x80|value);
   write_ds1302(0x8e,0x80);
            }
         if(s1num==2)  //fen
            {
            write_com(0x80+0x40+5);
            }
         if(s1num==3)  //shi
            {
            write_com(0x80+0x40+2);
            }
   if(s1num==4)  //week
            {

            write_com(0x80+12);
            //write_com(0x0f);
            }
      if(s1num==5) //day
            {
            write_com(0x80+9);
            }
         if(s1num==6) //month
            {
            write_com(0x80+6);
            }
         if(s1num==7)    //year
            {
            write_com(0x80+3);
            }


         if(s1num==8)
            {
   // TR0=1;
            s1num=0;
         write_com(0x0c);
            flag=0;
            value=(miao)/10*16+(miao)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x80,0x80|value);
   write_ds1302(0x8e,0x80);
            }
      }
}
if(s1num!=0)
{
if(s2==0)          //数字增加键按下
   {
   delay(5);
      if(s2==0)
      {
      while(!s2);
         if(s1num==1)
         {
         miao++;
         if(miao==60)
            miao=0;
         write_sfm(8,miao);
value=(miao)/10*16+(miao)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x80,value);
   write_ds1302(0x8e,0x80);
         write_com(0x80+0x40+8);
         }
         if(s1num==2)
         {
         fen++;
         if(fen==60)
            fen=0;

         write_sfm(5,fen);
   value=(fen)/10*16+(fen)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x82,value);
   write_ds1302(0x8e,0x80);
         write_com(0x80+0x40+5);
         }
         if(s1num==3)
         {
         shi++;
         if(shi==24)
            shi=0;

         write_sfm(2,shi);
   value=(shi)/10*16+(shi)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x84,value);
   write_ds1302(0x8e,0x80);
         write_com(0x80+0x40+2);
         }
if(s1num==4)
         {
         week++;
         if(week==8)
            week=1;
         write_com(0x80+12);
         write_week(week);
   value=(week)/10*16+(week)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x8a,value);
   write_ds1302(0x8e,0x80);

      }
         if(s1num==5)
         {
         day++;
         if(day==32)
            day=1;

         write_nyr(9,day);
value=(day)/10*16+(day)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x86,value);
   write_ds1302(0x8e,0x80);
         write_com(0x80+9);
      }
         if(s1num==6)
         {
         month++;
         if(month==13)
            month=1;

         write_nyr(6,month);
value=(month)/10*16+(month)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x88,value);
   write_ds1302(0x8e,0x80);
         write_com(0x80+6);
      }
      if(s1num==7)
         {
         year++;
         if(year==99)
            year=0;

         write_nyr(3,year);
   value=(year)/10*16+(year)%10;
   write_ds1302(0x8e,0x00);
   write_ds1302(0x8c,value);
   write_ds1302(0x8e,0x80);
         write_com(0x80+3);
      }

   }

   }
}
}
uchar BCD_Decimal(uchar bcd)
{
  uchar Decimal;
Decimal=bcd>>4;
return(Decimal=Decimal*10+(bcd&=0x0F));
}
void main()
{
init();
ds1302_init();
  while(1)
{
  keyscan();
if(flag==0)
{
miao=BCD_Decimal(read_ds1302(0x81));
fen=BCD_Decimal(read_ds1302(0x83));
   shi=BCD_Decimal(read_ds1302(0x85));
   week=BCD_Decimal(read_ds1302(0x8b));
   day=BCD_Decimal(read_ds1302(0x87));
month=BCD_Decimal(read_ds1302(0x89));
   year=BCD_Decimal(read_ds1302(0x8d));

write_sfm(8,miao);
write_sfm(5,fen);
write_sfm(2,shi);
write_nyr(9,day);
write_nyr(6,month);
write_nyr(3,year);
write_week(week);

}
}

}

void delay(uint z)
{
uint x,y;
  for(x=z;x>0;x--)
   for(y=110;y>0;y--);
}

未命名 (2).jpg

友情提示: 此问题已得到解决，问题已经关闭,关闭后问题禁止继续编辑，回答。

5条回答

2019-07-16 09:26

我看你的程序，确实太为难了点，没有备注，好费力啊.......看了下ds1302的驱动，觉得读数据那个函数两个for循环之间，需要拉高ds1302_IO,驱动部分，没有发现其他问题.....

顺便问一下，开始你不按键的情况下， ds1302正常走时么？在你的ds1302init部分，么有看到你启用外部晶振啊......应该不会走时，会定在那儿的。。
当你按键之后，你写 ds1302秒寄存器的时候，这儿加上了 0x80，即置了秒的自高位，激活了晶振.......

所以我觉得，你的程序，读出来ds1302后，直接显示秒的值，导致出错，应该换算一下，要忽略读出来秒的值的最高位。。。。miao &=~0x80；然后在送到显示屏，试试。。。。。。另外，程序要是你自己写的，你应该可以发现ds1302秒寄存器的定义哟。。。。。

评分

参与人数 1积分 +5 收起理由

zhihuizhou + 5 yatoo同学的每个回复都是那么认真.

查看全部评分

查看其它5个回答

一周热门更多>