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各位大神幫忙看看
問題詳述：在進行DS12C887芯片進行調試的時，液晶顯示不正常，剛上電，秒表的位置顯示|||+（1-9）順序轉，大概循環了有二三十秒的樣子又變成正常的數字顯示，而且斷電之后在重新上電的時間也沒有繼續走而是從一個隨機的時間開始走，而且我手動一下那個887芯片那個洞洞板，時間全部變成了||5:||5:||5（具體現象下圖）。不知道是不是887 的芯片壞了。剛開始以為是我把數據傳輸的腳位給焊接短路了，但是用萬用表測量都沒有短路，而且所有的線都進行了測試，都是沒問題的（程序參考郭天祥）
題外問題：有沒有新手獲得芯片推薦的地方。
圖片描述：實驗現象
附錄：單片機開發板原理圖
剛上電的現象
上電一段之間之后的現象
用手動887這個芯片的現象
單片機源程序如下:
- #include <REGX52.H>
- #define uchar unsigned char
- #define uint unsigned int
- sbit dula=P2^6;
- sbit wela=P2^7;
- sbit rs=P3^5;
- sbit RW=P3^6;
- sbit lcden=P3^4;
- sbit key1=P3^0;
- sbit key2=P3^1;
- sbit key3=P3^2;
- sbit rd=P3^7;
- sbit dscs=P1^4;
- sbit dsas=P1^5;
- sbit dsrw=P1^6;
- sbit dsds=P1^7;
- sbit dsirq=P3^3;
- sbit beef=P2^3;
- uchar code table[]=" 2022-04-28 WED";
- uchar code table1[]=" 09:59:50";
- uchar count,key1num,flag,flag1;
- void set_time();
- void write_ds(uchar add,uchar date);
- void set_alarm(uchar ashi,uchar afen,uchar amiao);
- uchar read_ds(uchar add);
- char shi,fen,miao;
- void write_sfm(uchar add,uchar date);
- void delay(uint xms)
- {
- uint i,j;
- for(i=xms;i>0;i--);
- for(j=110;j>0;j--);
- }
- void write_com(uchar com)
- {
- rs=0;
- RW=0;
- lcden=0;
- P0=com;
- delay(5);
- lcden=1;
- delay(5);
- lcden=0;
- }
- void write_date(uchar date)
- {
- rs=1;
- RW=0;
- lcden=0;
- P0=date;
- delay(5);
- lcden=1;
- delay(5);
- lcden=0;
- }
- void LCDINIT()
- {
- uchar num;
- dula=0;
- wela=0;
- lcden=0;
- write_com(0x38);
- write_com(0x0c);
- write_com(0x06);
- write_com(0x01);
- write_com(0x80);
- for(num=0;num<15;num++)
- {
- write_date(table[num]);
- delay(20);
- }
- write_com(0x80+0x40);
- for(num=0;num<12;num++)
- {
- write_date(table1[num]);
- delay(5);
- }
- }
- void init()
- {
- EA=1;
- EX1=1;
- IT1=1;
- set_time();
- set_alarm(13,52,00);
-
-
-
-
- write_ds(0x0b,0x26);
- read_ds(0x0c);
- }
- //void write_ds(uchar add,uchar date
- void keyscan()
- {
- rd=0;
- if(flag1==1)
- {
- if(key2==0)
- {
- delay(5);
- if(key2==0)
- {
- while(!key2);
- flag1=0;
- }
- }
- if(key3==0)
- {
- delay(5);
- if(key3==0)
- {
- while(!key3);
- flag1=0;
- }
- }
- }
- if(key1==0)
- {
- delay(5);
- if(key1==0)
- {
- flag=1;
- flag1=0;
- key1num++;
- while(!key1);
-
- if(key1num==1)
- {
-
- write_com(0x80+0x40+11);
- write_com(0x0f);
- }
- if(key1num==2)
- {
-
- write_com(0x80+0x40+8);
- write_com(0x0f);
- }
- if(key1num==3)
- {
-
- write_com(0x80+0x40+5);
- write_com(0x0f);
- }
- if(key1num==4)
- {
- key1num=0;
- flag=0;
- write_ds(0,miao);
- write_ds(2,fen);
- write_ds(4,shi);
-
-
- write_com(0x0c);
- }
- }
- }
-
- if(key1num!=0)
- {
- if(key2==0)
- {
- delay(5);
- if(key2==0)
- {
- while(!key2);
- if(key1num==1)
- {
- miao++;
- if(miao==60)
- {
- miao=0;
- }
- write_com(0x80+0x40+10);
- write_sfm(10,miao);
- }
- if(key1num==2)
- {
- fen++;
- if(fen==60)
- fen=0;
- write_sfm(7,fen);
- write_com(0x80+0x40+7);
- }
- if(key1num==3)
- {
- shi++;
- if(shi==24)
- shi=0;
- write_sfm(4,shi);
- write_com(0x80+0x40+4);
- }
- }
- }
- if(key3==0)
- {
- delay(5);
- if(key3==0)
- {
- while(!key3);
- if(key1num==1)
- {
-
- miao--;
- if(miao==-1)
- {
- miao=59;
- write_sfm(10,miao);
- write_com(0x80+0x40+10);
- }
-
- }
- if(key1num==2)
- {
- fen--;
- if(fen==-1)
- fen=59;
- write_sfm(7,fen);
- write_com(0x80+0x40+7);
- }
- if(key1num==3)
- {
- shi--;
- if(shi==-1)
- shi=23;
- write_sfm(4,shi);
- write_com(0x80+0x40+4);
- }
- }
- }
- }
- }
- /
- /
- void write_sfm(uchar add,uchar date)
- {
- uchar shi,ge;
- shi=date/10;
- ge=date%10;
- write_com(0x80+0x40+add);
- write_date(0x30+shi);
- write_date(0x30+ge);
- }
- void write_ds(uchar add,uchar date)
- {
- dscs=0;
- dsas=1;
- dsds=1;
- dsrw=1;
- P0=add;
- dsas=0;
- dsrw=0;
- P0=date;
- dsrw=1;
- dsas=1;
- dscs=1;
- }
- uchar read_ds(uchar add)
- {
- uchar ds_date;
- dscs=0;
- dsas=1;
- dsds=1;
- dsrw=1;
- P0=add;
- dsas=0;
- dsds=0;
- P0=0xff;
- ds_date=P0;
- dsds=1;
- dsas=1;
- dscs=1;
- return ds_date;
- }
- void set_time()
- {
- write_ds(4,00);
- write_ds(2,00);
- }
- void set_alarm(uchar ashi,uchar afen,uchar amiao)
- {
- write_ds(1,amiao);
- write_ds(3,afen);
- write_ds(5,ashi);
- }
- void didi()
- {
- beef=0;
- delay(50);
- beef=1;
- delay(100);
- beef=0;
- delay(50);
- beef=1;
- }
- void main()
- {
- LCDINIT();
-
- init();
-
-
-
- while(1)
- {
- keyscan();
-
-
- if(flag1==1)
- didi();
-
- if(flag==0)
- {
- miao=read_ds(0);
- fen=read_ds(2);
- shi=read_ds(4);
- write_sfm(10,miao);
- write_sfm(7,fen);
- write_sfm(4,shi);
- }
- }
-
-
- }
- void exter() interrupt 2
- {
- uchar c;
-
- flag1=1;
- c=read_ds(0x0c);
- }
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