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一.DS12R887 寫命令時序圖
二.DS12R887 讀命令時序圖
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三.電子表程序源碼如下 這里用到12864LCD。獨立式按按三個 - #include<reg52.h>
- #define uchar unsigned char
- #define uint unsigned int
- sbit dula=P2^6;
- sbit wela=P2^7; //這個是為了防止數碼管參合進來
- sbit rs=P3^5;
- sbit lcden=P3^4;
- sbit s1=P3^0;
- sbit s2=P3^1;
- sbit s3=P3^2;
- sbit rd=P3^7; //這些是獨立式按鍵與揚聲器 液晶屏引腳鏈接定義
- sbit beep=P2^3;
- sbit dscs=P1^4;
- sbit dsas=P1^5;
- sbit dsrw=P1^6;
- sbit dsds=P1^7;
- sbit dsirq=P3^3; //這些都是DS12R887各引腳與89C52的鏈接
- uchar count,s1num,flag,flag1;
- char miao,shi,fen;
- uchar code table[]=" 2007-7-30 MON";
- uchar code table1[]=" : : ";
- void write_ds(uchar,uchar);
- void set_alarm(uchar,uchar,uchar);
- uchar read_ds(uchar);void set_time();
- void delay(uint z)
- {
- uint x,y;
- for(x=z;x>0;x--)
- for(y=110;y>0;y--);
- }
-
- void didi() //鬧鐘鈴聲
- {
- beep=0;
- delay(50);
- beep=1;
- delay(100);
- beep=0;
- delay(50);
- beep=1;
- }
-
- void write_com(uchar com) //液晶屏寫命令子程式。時序參考其它日志
- {
- rs=0;
- lcden=0;
- P0=com;
- delay(5);
- lcden=1;
- delay(5);
- lcden=0;
- }
- void write_date(uchar date) //液晶屏寫數據子程式。時序參考其它日志
- {
- rs=1;
- lcden=0;
- P0=date;
- delay(5);
- lcden=1;
- delay(5);
- lcden=0;
- }
- void init()
- {
- uchar num;
- EA=1;
- EX0=1;
- IT0=1; \\開中斷。。找開外部中斷0
- dula=0;
- wela=0; \\防止數據管參合。其它電路可以不要
- lcden=0;
- // set_time();
- set_alarm(14,13,10);
- write_ds(0x0B,0x26);
- read_ds(0x0c);
- // fen=59;
- // miao=53;
- // shi=23;
- write_com(0x38);
- write_com(0x0c);
- write_com(0x06);
- write_com(0x01);
- write_com(0x80); \\初始化液晶屏
- for(num=0;num<15;num++)
- {
- write_date(table[num]);
- delay(5);
- }
- write_com(0x80+0x40);
- for(num=0;num<12;num++)
- {
- write_date(table1[num]);
- delay(5);
- }
- }
- void write_sfm(uchar add,uchar date) \\用于向液晶屏寫時間數據的子程式
- {
- uchar shi,ge;
- shi=date/10;
- ge=date%10;
- write_com(0x80+0x40+add);
- write_date(0x30+shi);
- write_date(0x30+ge);
- }
- void keyscan() \\獨立式按接掃描子程序
- {
- rd=0;
- if(flag1==1)
- {
- if(s2==0)
- {
- delay(5);
- if(s2==0)
- {
- while(!s2);
- flag1=0;
- }
-
- }
- if(s3==0)
- {
- delay(5);
- if(s3==0)
- {
- while(!s3);
- flag1=0;
- }
-
- }
- }
-
- if(s1==0)
- {
- delay(5);
- if(s1==0)
- { s1num++;
- flag=1;
- flag1=0;
- while(!s1);
- if(s1num==1)
- {
- TR0=0;
- write_com(0x80+0x40+10);
- write_com(0x0f);
- }
- }
- if(s1num==2)
- {
- write_com(0x80+0x40+7);
- }
- if(s1num==3)
- {
- write_com(0x80+0x40+4);
- }
- if(s1num==4)
- {
- s1num=0;
- write_com(0x0c);
- flag=0;
- write_ds(0,miao);
- write_ds(2,fen);
- write_ds(4,shi); \\按鍵設定時間處理過程
- }
-
- }
- if(s1num!=0)
- {
- if(s2==0)
- {
- delay(1);
- if(s2==0)
- {
- while(!s2);
- if(s1num==1)
- {
- miao++;
- if(miao==60)
- miao=0;
- write_sfm(10,miao);
- write_com(0x80+0x40+10);
-
-
- }
- if(s1num==2)
- {
- fen++;
- if(fen==60)
- fen=0;
- write_sfm(7,fen);
- write_com(0x80+0x40+7);
- }
- if(s1num==3)
- {
- shi++;
- if(shi==24)
- shi=0;
- write_sfm(4,shi);
- write_com(0x80+0x40+4);
- }
- }
- }
- if(s3==0)
- {
- delay(1);
- if(s3==0)
- {
- while(!s3);
- if(s1num==1)
- {
- /* if(miao==0)
- {
- miao=59;
- write_sfm(10,miao);
- write_com(0x80+0x40+10);
- }*/
- miao--;
- if(miao==-1)
- miao=59;
- write_sfm(10,miao);
- write_com(0x80+0x40+10);
- }
- if(s1num==2)
- {
- fen--;
- if(fen==-1)
- fen=59;
- write_sfm(7,fen);
- write_com(0x80+0x40+7);
- }
- if(s1num==3)
- {
- shi--;
- if(shi==-1)
- shi=23;
- write_sfm(4,shi);
- write_com(0x80+0x40+4);
- }
- }
- }
- }
- }
- void write_ds(uchar add,uchar date) \\DS12R887寫數據。。可以戶寫入設定好的時間 每次寫一個地址的數據。時序參看上圖
- {
- 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) \\用于讀取DS12R887的內部時間。。。。只能讀一個地址的數據。時序參看上圖
- {
- uchar ds_date;
- dsas=1;
- dsds=1;
- dsrw=1;
- dscs=0;
- 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(4,10);
- write_ds(2,32);
-
- }
- void set_alarm(uchar ashi,uchar afen,uchar amiao)
- {
- write_ds(1,amiao);
- write_ds(3,afen);
- write_ds(5,ashi);
- }
- void main() //主函數很簡單。就是把。DS12R887的時間值讀取出來送到液晶屏顯示就ok了
- {
- 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 0 \\外部中斷0服務處理程式。。。。。用于啟動鬧鐘響鈴。。
- { uchar c;
- flag1=1;
- c=read_ds(0x0c);
- }
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