DS12C887电子时钟(附程序)

下面附有实物图和引脚接法图及程序

时钟实物图

LCD1602引脚连接

P1.0 P1.1 P1.2

P0.0~P0.7

DS12C887引脚连接(打叉的表示不接)

蜂鸣器引脚连接按键引脚连接P1.3

P3.4

P3.5

P3.6

P3.7

源程序

#include

#include

#define uint unsigned int

#define uchar unsigned char

sbit lcdrs=P1^0;

sbit rw=P1^1;

sbit lcden=P1^2;

sbit s1=P3^4; //功能键

sbit s2=P3^5; //增大键

sbit s3=P3^6; //减小键

sbit s4=P3^7; //闹铃查看键

sbit beep=P1^3;//蜂鸣器

sbit dscs=P1^7;

sbit dsas=P1^6;

sbit dsrw=P1^5;

sbit dsds=P1^4;

sbit dsirq=P3^3; //中断

bit flag1,flag_ri;//定义标志位flag1设置闹铃

uchar count,s1num,flag,t0_num;

char miao,shi,fen,year,month,day,week,amiao,afen,ashi;

char code table[]=" 20 - - "; // 20 - -

uchar code table1[]=" : : "; // : :

void write_ds(uchar,uchar); uchar read_ds(uchar);void set_time(); void read_alarm();void set_alarm(uchar,uchar,uchar);

void delayms(uint z) //延时毫秒的程序

{

uint x,y;

for(x=z;x>0;x--)

for(y=112;y>0;y--);

}

void di()

{

beep=0;

delayms(100);

beep=1;

}

void write_cmd(uchar cmd)

{

lcden=0;

lcdrs=0;

P0=cmd;

_nop_();

lcden=1;

delayms(1);

lcden=0;

_nop_();

}

void write_dat(uchar dat)

{

lcden=0;

lcdrs=1;

P0=dat;

_nop_();

lcden=1;

delayms(1);

lcden=0;

_nop_();

}

void lcdint()

{

lcden=0;

write_cmd(0x38); // 显示模式设置

write_cmd(0x0c); //开显示，不显示光标，不闪烁

write_cmd(0x06); //写一个字符后地址加1，屏幕不移

write_cmd(0x01); //清屏

delayms(1);

}

void init()

{

uchar num;

rw=0;

EA=1;//开总中断

EX1=1;//开外部中断1

IT1=1;//外部中断下降沿触发

flag1=0; t0_num=0;s1num=0;week=1;

/* write_ds(0x0A,0x20);//打开振荡器

write_ds(0x0B,0x26);//设置24小时模式，数据二进制格式，开启闹铃中断set_time();//设置上电默认时间,调试的时候用*/

lcdint();

write_cmd(0x80);

for(num=0;num<15;num++)

{

write_dat(table[num]);

}

write_cmd(0xc0);

for(num=0;num<11;num++)

{

write_dat(table1[num]);

}

}

void write_sfm(uchar add,char date) //写时间,2位一起写

{

char shi,ge;

shi=date/10;ge=date%10;

write_cmd(0xc0+add);

write_dat(0x30+shi);

write_dat(0x30+ge);

}

void write_nyr(uchar add,char date)//年月日

{

char shi,ge;

shi=date/10;ge=date%10;

write_cmd(0x80+add);

write_dat(0x30+shi);

write_dat(0x30+ge);

}

void write_week(char we)//星期

{

write_cmd(0x80+12);

switch(we)

{

case 1: write_dat('M');write_dat('O');write_dat('N');break;

case 2: write_dat('T');write_dat('U');write_dat('E');break;

case 3: write_dat('W');write_dat('E');write_dat('D');break;

case 4: write_dat('T');write_dat('H');write_dat('U');break;

case 5: write_dat('F');write_dat('R');write_dat('I');break;

case 6: write_dat('S');write_dat('A');write_dat('T');break;

case 7: write_dat('S');write_dat('U');write_dat('N');break;

}

}

void keyscan()

{

if(flag_ri==1)

{

if((s1==0)||(s2==0)||(s3==0)||(s4==0))//按任意键取消闹钟报警

{

delayms(5);

if((s1==0)||(s2==0)||(s3==0)||(s4==0))

{

while(!(s1&&s2&&s3&&s4));di();