DS1302用液晶显示很乱，请前辈/高手指点

PCB

`我第一次用PCB板做了一个lcd1602显示的ds1302时钟，把程序下载进去后液晶显示很不稳定，数值也不正确，要么速度很快，要么静止不变，请前辈指点一下问题在哪啊，谢谢。。。
是不是因为单片机晶振用的12Mhz，应该改为11.0592的？还是因为单片机和ds1302的距离太近干扰了？程序是没问题的。见附件

shizhong.zip (19.58 KB, 下载次数: 4 )

`

康鹏程 · 2014-3-16 20:29:55

你要把程序贴出来啊
这样搞成压缩包谁有心情给你看啊

2014-3-16 21:54:01

可是程序应该没问题的，在其他板子上运行就行。我觉得会不会是布局布线问题，或者晶振，请指教啊。。。压缩包里是PCB图。程序：
#include
#define uint unsigned int
#define uchar unsigned char
uchar a,miao,shi,fen,ri,yue,nian,week,flag,temp,key1n;
#define yh 0x80  //第一行的初始位置
#define er 0x80+0x40 //第二行初始位置
//***it cs1=P3^7;
//***it ledk=P2^5;

***it wr=P1^1;
***it rs=P1^0;
***it en=P2^5;
***it SCLK=P2^1;  // 6  P1.1
***it IO=P2^0; // 7  P1.0
***it RST=P2^4; //时钟 5  P1.2
***it ACC0=ACC^0;
***it ACC7=ACC^7;
***it key1=P3^4;
***it key2=P3^5;
***it key3=P3^6;
uchar code tab1[]={"2009-  - THU"};
uchar code tab2[]={"  :  :  "};
void delay(uint xms)//延时函数
{
uint x,y;
for(x=xms;x>0;x--)
   for(y=110;y>0;y--);
}
/******************液晶写入************************/
write_1602com(uchar com)//液晶写入指令函数
{
rs=0;//置为写入命令
P0=com;//送入数据
delay(1);
en=1;//拉高使能端
delay(1);
en=0;//完成高脉冲
}
write_1602dat(uchar dat)
{
rs=1;//置为写入数据
P0=dat;//送入数据
delay(1);
en=1;
delay(1);
en=0;
}
/*********************over***********************/
/********************ds1302****************************/
void write_byte(uchar dat)
{
ACC=dat;
RST=1;
for(a=8;a>0;a--)
{
IO=ACC0;
SCLK=0;
SCLK=1;
ACC=ACC>>1;
}
}
uchar read_byte()
{
RST=1;
for(a=8;a>0;a--)
{
ACC7=IO;
SCLK=1;
SCLK=0;
ACC=ACC>>1;

}
return (ACC);
}
void write_1302(uchar add,uchar dat)
{

RST=0;
SCLK=0;
RST=1;
write_byte(add);
write_byte(dat);
SCLK=1;
RST=0;
}
uchar read_1302(uchar add)
{
uchar temp;
RST=0;
SCLK=0;
RST=1;
write_byte(add);
temp=read_byte();
SCLK=1;
RST=0;
return(temp);
}
uchar BCD_Decimal(uchar bcd)
{
uchar Decimal;
Decimal=bcd>>4;
return(Decimal=Decimal*10+(bcd&=0x0F));
}
void ds1302_init()
{
RST=0;
SCLK=0;
write_1302(0x80,miao|0x00);//允许写
}

void write_sfm(uchar add,uchar dat)//写时分秒
{
uchar gw,sw;
gw=dat%10;
sw=dat/10;
write_1602com(er+add);
write_1602dat(0x30+sw);
write_1602dat(0x30+gw);

}
void write_nyr(uchar add,uchar dat)
{
uchar gw,sw;
gw=dat%10;
sw=dat/10;
write_1602com(yh+add);
write_1602dat(0x30+sw);
write_1602dat(0x30+gw);

}
void write_week(uchar week)//写星期函数
{
write_1602com(yh+0x0d);
switch(week)
{
case 1:write_1602dat('M');//delay(5);
   write_1602dat('O');//delay(5);
   write_1602dat('N');
   break;

case 2:write_1602dat('T');//delay(5);
   write_1602dat('U');//delay(5);
   write_1602dat('E');
   break;

case 3:write_1602dat('W');//delay(5);
   write_1602dat('E');//delay(5);
   write_1602dat('D');
   break;

case 4:write_1602dat('T');//delay(5);
   write_1602dat('H');//delay(5);
   write_1602dat('U');
   break;

case 5:write_1602dat('F');//delay(5);
   write_1602dat('R');//delay(5);
   write_1602dat('I');
   break;

case 6:write_1602dat('S');//delay(5);
   write_1602dat('T');//delay(5);
   write_1602dat('A');
   break;

case 7:write_1602dat('S');//delay(5);
   write_1602dat('U');//delay(5);
   write_1602dat('N');
   break;

}

}
lcd_init()//液晶初始化函数
{    wr=0;
write_1602com(0x38);//设置液晶工作模式
write_1602com(0x0c);//开显示不显示光标
write_1602com(0x06);//整屏不移动，指针加一
write_1602com(0x01);
write_1602com(yh+2);//字符写入的位置
for(a=0;a<14;a++)
{
write_1602dat(tab1[a]);
//delay(3);
}
write_1602com(er+4);
for(a=0;a<8;a++)
{
write_1602dat(tab2[a]);
//delay(3);
}

}
void keyscan()
{

if(key1==0)//key1为功能键
{
delay(5);
if(key1==0)
{
while(!key1);
key1n++;
if(key1n==9)
key1n=1;
switch(key1n)
{

case 1: TR0=0;//关闭定时器
//TR1=0;
write_1602com(er+0x0b);//写入光标位置
   write_1602com(0x0f);//设置光标为闪烁
   temp=(miao)/10*16+(miao)%10;
   write_1302(0x8e,0x00);
   write_1302(0x80,0x80|temp);//miao
   write_1302(0x8e,0x80);
   break;
case 2:  write_1602com(er+8);//fen

      //write_1602com(0x0f);
break;
case 3: write_1602com(er+5);//shi
      //write_1602com(0x0f);
break;
case 4: write_1602com(yh+0x0f);//week
      //write_1602com(0x0f);
break;
case 5: write_1602com(yh+0x0b);//ri
      //write_1602com(0x0f);
break;
case 6: write_1602com(yh+0x08);//yue
      //write_1602com(0x0f);
break;
case 7: write_1602com(yh+0x05);//nian
      //write_1602com(0x0f);
break;
case 8:
write_1602com(0x0c);//设置光标不闪烁
TR0=1;//打开定时器
temp=(miao)/10*16+(miao)%10;
   write_1302(0x8e,0x00);
   write_1302(0x80,0x00|temp);//miao
   write_1302(0x8e,0x80);
         break;

}

}

}
if(key1n!=0)//当key1按下以下。再按以下键才有效
{

if(key2==0)  //上调键
{
delay(5);
if(key2==0)
{
while(!key2);
switch(key1n)
{
case 1:miao++;
if(miao==60)
miao=0;
write_sfm(0x0a,miao);//写入新的秒数
temp=(miao)/10*16+(miao)%10;
   write_1302(0x8e,0x00);
   write_1302(0x80,0x80|temp);
   write_1302(0x8e,0x80);
write_1602com(er+0x0b);//因为设置液晶的模式是写入数据后，指针自动加一，在这里是写回原来的位置
//write_1602com(0x0b);
break;
case 2:fen++;
if(fen==60)
fen=0;
write_sfm(0x07,fen);
temp=(fen)/10*16+(fen)%10;
   write_1302(0x8e,0x00);
   write_1302(0x82,temp);
   write_1302(0x8e,0x80);
write_1602com(er+8);
break;
case 3:shi++;
if(shi==24)
shi=0;
write_sfm(4,shi);
temp=(shi)/10*16+(shi)%10;
   write_1302(0x8e,0x00);
   write_1302(0x84,temp);
   write_1302(0x8e,0x80);
write_1602com(er+5);
break;
case 4:week++;
if(week==8)
week=0;
write_week(week);

write_1602com(yh+0x0f);
break;
case 5:ri++;
if(ri==31)
ri=0;
write_nyr(10,ri);
temp=(ri)/10*16+(ri)%10;
   write_1302(0x8e,0x00);
   write_1302(0x86,temp);
   write_1302(0x8e,0x80);
write_1602com(yh+11);
break;
case 6:yue++;
if(yue==13)
yue=0;
write_nyr(7,yue);
temp=(yue)/10*16+(yue)%10;
   write_1302(0x8e,0x00);
   write_1302(0x88,temp);
   write_1302(0x8e,0x80);
write_1602com(yh+8);
break;
case 7:nian++;
   if(nian==100)
nian=0;
write_nyr(4,nian);
write_1602com(yh+5);
break;

}

}

}
if(key3==0)
{
delay(5);
if(key3==0)
{
while(!key3);
switch(key1n)
{
case 1:miao--;
if(miao==-1)
miao=59;
write_sfm(0x0a,miao);//写入新的秒数
write_1602com(er+0x0b);//因为设置液晶的模式是写入数据后，指针自动加一，在这里是写回原来的位置
//write_1602com(0x0b);
break;
case 2:fen--;
if(fen==-1)
fen=59;
write_sfm(7,fen);
temp=(fen)/10*16+(fen)%10;
   write_1302(0x8e,0x00);
   write_1302(0x82,temp);
   write_1302(0x8e,0x80);
write_1602com(er+8);
break;

case 3:shi--;
   if(shi==-1)
shi=23;
write_sfm(4,shi);
temp=(shi)/10*16+(shi)%10;
   write_1302(0x8e,0x00);
   write_1302(0x84,temp);
   write_1302(0x8e,0x80);
write_1602com(er+5);
break;
case 4:week--;
if(week==-1)
week=7;
write_week(week);
write_1602com(yh+0x0f);
break;
case 5:ri--;
if(ri==-1)
ri=30;
write_nyr(10,ri);
temp=(ri)/10*16+(ri)%10;
   write_1302(0x8e,0x00);
   write_1302(0x86,temp);
   write_1302(0x8e,0x80);
write_1602com(yh+11);
break;
case 6:yue--;
if(yue==-1)
yue=12;
write_nyr(7,yue);
temp=(yue)/10*16+(yue)%10;
   write_1302(0x8e,0x00);
   write_1302(0x88,temp);
   write_1302(0x8e,0x80);
write_1602com(yh+8);
break;
case 7:nian--;
   if(nian==-1)
nian=99;
write_nyr(4,nian);
write_1602com(yh+5);
break;

}

}

}

}

}
void init()
{
TMOD=0x11;
TH0=0;
TL0=0;
EA=1;
ET0=1;
TR0=1;

}

void main()
{

lcd_init();
ds1302_init();
init();
while(1)
{
//TH0=(65536-60000)/256;
//TL0=(65536-60000)%256;

keyscan();

}
}
void timer0() interrupt 1
{
miao = BCD_Decimal(read_1302(0x81));
fen = BCD_Decimal(read_1302(0x83));
shi  = BCD_Decimal(read_1302(0x85));
ri  = BCD_Decimal(read_1302(0x87));
yue = BCD_Decimal(read_1302(0x89));
nian=BCD_Decimal(read_1302(0x8d));
week=BCD_Decimal(read_1302(0x8b));
//keyscan();
write_sfm(10,miao);
//write_1602com(er+0x0a);
//write_1602dat(':');
write_sfm(7,fen);
//write_1602com(er+0x07);
//write_1602dat(':');
write_sfm(4,shi);

//write_nyr(4,nian);
write_nyr(10,ri);
write_nyr(7,yue);
//write_week(week);
}

2014-3-16 22:04:46

1036479708 发表于 2014-3-16 20:29
你要把程序贴出来啊
这样搞成压缩包谁有心情给你看啊

麻烦看一下照片和PCB图

康鹏程 · 2014-3-17 01:15:45

你在其他板上试验如果没出错的话就先把晶振换了，要按照资料来接

康鹏程 · 2014-3-17 01:19:30

如果还不行就把
uchar read_byte()
{
      RST=1;
      for(a=8;a>0;a--)
      {
           ACC=ACC>>1;
            ACC7=IO;
            SCLK=1;
            SCLK=0;
      }
      return (ACC);
}
这样试一下