DS1302时钟电路.doc

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1、原理图源程序#include/*位定义*/sbit io=P16; /ds1302的串行数据I/O口sbit clk=P15; /ds1302的时钟口sbit rst=P17; /ds1302的复位口sbit acc0=ACC0; /移位时的第0位sbit acc7=ACC7; /移位时用的第7位sbit busy=P07; /lcd 忙标志位sbit rs=P20; /lcd 数据状态位sbit rw=P21; /lcd 读写控件位sbit re=P22; /lcd 使能位sbit menu=P33; /菜单sbit inc=P32; /加一sbit dec=P35; /减一sbit qui

2、t=P34; /退出/*全局变量*/unsigned char sec,min,hour,day,month,week,year; /秒，分，时，日，月，星期，年char newsec,newmin,newhour,newday,newmonth,newweek,newyear; /重写数据用的秒，分，时unsigned char bksec,bkmin,bkhour,bkweek,bkday,bkmonth,bkyear,down,count; /闪烁标志位unsigned char flag,daflag; / 加减标志位，时间日期标志位unsigned char timete8,time

3、de10; /分别存放，时分秒；年月日unsigned char week13=SUN; /星期日unsigned char week23=MON; / 一unsigned char week33=TUE; / 二unsigned char week43=WED; / 三unsigned char week53=THU; / 四unsigned char week63=FRI; / 五unsigned char week73=SAT; / 六unsigned char name=; / 设计者名字/*函数申明*/void delay(unsigned char ms); /延时void wri

4、tebyte(unsigned char wdat);/写一字节到ds1302unsigned char readbyte(); /从ds1302中读一字节unsigned char readdat(); /读ds1302某地址数据void writedat(unsigned char waddr,unsigned char x);/写数据到ds1302的某地址void ifprotect(flag); /是否写允许void timebuf(); /时间缓冲区void checkbusy(); /测试lcd忙碌状态void wrcom(unsigned char com); /写指令到lcdv

5、oid wrdat(unsigned char dat); /写数据到lcdvoid lcdinit(); /lcd初始化void scanmenu(); /menu扫描void funcmenu(); /menu功能void scaninc(); /扫描加能函数void scandec(); /扫描减一函数void scanquit(); /扫描退出函数void funcinc(); /加一功能函数void funcdec(); /减一功能函数void funcquit(); /退出功能函数void turn_sub(unsigned char newval,unsigned char ne

6、wbk,unsigned char newaddr); /调时子函数void sub_buf(unsigned char subk,unsigned char bfte,unsigned char fda); /时间缓冲子函数void sub_week(unsigned char num); /显示星期子函数/*ds1302函数局部*/void delay(unsigned char ms) /延时函数 unsigned char i; unsigned char m=4; while(ms-) for(i=0;i0;i-) io=acc0; /从最低位开始传送 clk=1; /产生一个边沿

7、在写指令时供产生上升沿，在写数据时供产生紧挨着的下降沿 clk=0; ACC=1; unsigned char readbyte() /从ds1302中读一字节 unsigned char i1; for(i1=8;i10;i1-) ACC=1; /保证最低位传送至最低位 acc7=io; /从最低位开始传送 clk=1; /产生一个边沿 在读数据时供产生上升沿 clk=0; return(ACC);unsigned char readdat(unsigned char raddr) /读ds1302某地址数据 unsigned char value; rst=0; /在读写前何证rst为低电

8、平 clk=0; rst=1; /在读写期间保证rst为高电平 且只有在clk为低 电平时才能变为高电平 writebyte(raddr); value=readbyte(); rst=0; /读写完毕后保证rst为低，clk为高 clk=1; return(value);/*写数据到ds1302的某地址*/void writedat(unsigned char waddr,unsigned char x) rst=0; clk=0; rst=1; writebyte(waddr); writebyte(x); rst=0; clk=1;/*是否写保护*/void ifprotect(flag

9、) if(flag) /flag=1时禁止写入 writedat(0x8e,0x10); else /flag=0时允许写入 writedat(0x8e,0x00);void readtime() /读时间 unsigned char time; time=readdat(0x81); /读秒 sec=(time&0x70)4)*10+(time&0x0f); /将bcd码转换成十进制数 time=readdat(0x83); /读分 min=(time&0x70)4)*10+(time&0x0f); time=readdat(0x85); /读时 hour=(time&0x70)4)*10+

10、(time&0x0f); time=readdat(0x87); /读日 day=(time&0x70)4)*10+(time&0x0f); time=readdat(0x89); /读月 month=(time&0x70)4)*10+(time&0x0f); time=readdat(0x8d); /读年 year=(time4)*10+(time&0x0f); time=readdat(0x8b); /读星期 week=time&0x07;/*时间缓冲子函数*/void sub_buf(unsigned char subk,unsigned char bfte,unsigned char

11、fda) if(subk=1) /判断是否正常显示 if(daflag=1) /判断是日间还是日期 timetefda=bfte%10+48; timetefda+1=bfte/10+48; else timedefda=bfte%10+48; timedefda+1=bfte/10+48; else /显示空 if(daflag=1) /判断是时间还是日期 timetefda=0x02; timetefda+1=0x02; else timedefda=0x02; timedefda+1=0x02; void timebuf() /时间缓冲区 readtime(); /调用读时间函数 daf

12、lag=1; sub_buf(bksec,sec,0); /调用时间缓冲子函数 timete2=:; sub_buf(bkmin,min,3); timete5=:; sub_buf(bkhour,hour,6); daflag=0; sub_buf(bkday,day,0); timede2=-; sub_buf(bkmonth,month,3); timede5=-; if(bkyear0;i2-) wrdat(timedei2-1); wrcom(0xc0); /在第二行显示年月日 for(i3=8;i30;i3-) wrdat(timetei3-1); switch(week) /第一

13、行显示星期 case 1:sub_week(1);break; case 2:sub_week(2);break; case 3:sub_week(3);break; case 4:sub_week(4);break; case 5:sub_week(5);break; case 6:sub_week(6);break; case 7:sub_week(7);break; for(i5=0;i55;i5+) /显示作者名字 wrcom(0xca+i5); wrdat(namei5); void sub_week(unsigned char num) /显示星期子函数 unsigned char

14、 i4; for(i4=0;i43;i4+) if(bkweek4)*10+(newval&0x0f); /将bcd码转换成十进制 if(flag=1) /判断是加一还是减一 newval+; else newval-; switch(count) case 1: if(newval59) newval=0;break; case 2: if(newval59) newval=0;break; case 3: if(newval23) newval=0;break; case 5: if(newval31) newval=0;break; case 6: if(newval12) newval

15、=0;break; case 7: if(newval79) newval=0;break; default:break; ifprotect(0); writedat(newaddr-1),(newval/10)3) newbk=0; display(); /将修改后的值显示出来 void scanmenu() /menu扫描 if(menu=0) /判断menu键是否按下 delay(1); /延时消抖实际中延时要比此长一般约10ms if(menu=0) /再次判断menu键是否按下 down=1; /menu键按下那么置其标志位为1 while(menu!=1); /等待按键松开 co

16、unt+; /记录menu按下的次数 if(count7) count=1; ifprotect(0); /按下menu键后禁止ds1302工作 sec=readdat(0x81); writedat(0x80,0x80|sec); ifprotect(1); void funcmenu() /menu键功能函数 switch(count) case 1:scaninc();scandec(); /每按一次目录键对inc，dec键进行一次扫描 do /根据count的计数来判断对那一值进行修改，并保证这一值闪烁 bkyear=1; bksec+; if(bksec3) bksec=0; whi

17、le(count!=1); scanquit(); /每按一次目录键对quit键进行一次扫描 display(); /退出时正常显示 break; case 2:scaninc();scandec(); do bksec=1; /保证退出上一值的闪烁后，让其正常显示 bkmin+; if(bkmin3) bkmin=0; while(count!=2); scanquit(); display(); break; case 3:scaninc();scandec(); do bkmin=1; bkhour+; if(bkhour3) bkhour=0; while(count!=3); dis

18、play(); scanquit(); break; case 4:scaninc();scandec(); do bkhour=1; bkweek+; if(bkweek3) bkweek=0; while(count!=4); display(); scanquit(); break; case 5:scaninc();scandec(); do bkweek=1; bkday+; if(bkday3) bkday=0; while(count!=5); display(); scanquit(); break; case 6:scaninc();scandec(); do bkday=1

19、; bkmonth+; if(bkmonth3) bkmonth=0; while(count!=6); display(); scanquit(); break; case 7:scaninc();scandec(); do bkmonth=1; bkyear+; if(bkyear3) bkyear=0; while(count!=7); display(); scanquit(); break; default: break; void scaninc() /扫描inc按键 if(inc!=1) /判断inc键是否按下 /延时消拌再次判断 delay(1); if(inc!=1) whi

20、le(inc!=1); /等待按键松开 flag=1; funcinc(); /调用inc功能函数 void scandec() /扫描dec键 if(dec!=1) delay(1); if(dec!=1) while(dec!=1); flag=0; funcdec(); void scanquit() /扫描quit键 if(quit!=1) delay(1); if(quit!=1) while(quit!=1); funcquit(); void funcinc() /inc功能 键 switch(count) case 1:do /对秒进行修改 turn_sub(newsec,bk

21、sec,0x81); sec=readdat(0x81); ifprotect(0); /禁止ds1302工作 writedat(0x80,0x80|sec); ifprotect(1); while(count!=1);break; case 2:do /对分进行修改 turn_sub(newmin,bkmin,0x83); while(count!=2);break; case 3: turn_sub(newhour,bkhour,0x85); while(count!=3);break; case 4:do newweek=readdat(0x8b); newweek+; if(neww

22、eek7) newweek=1; ifprotect(0); writedat(0x8a,newweek); ifprotect(1); bkweek+; if(bkweek3) bkweek=0; display(); while(count!=4);break; case 5:do turn_sub(newday,bkday,0x87); while(count!=5);break; case 6:do turn_sub(newmonth,bkmonth,0x89); while(count!=6);break; case 7:do turn_sub(newyear,bkyear,0x8d); while(count!=7);break; default: break; void funcdec() /dec按键功能函数 switch(count) case 1:do