DS12887+lcd1602 perpetual calendar simulation schematic + program-EEWORLD

Collect

The following is the simulation schematic:

The 51 single-chip microcomputer drives the DS12887 clock chip and uses the lcd1602 liquid crystal screen to display the perpetual calendar

The source program is as follows:

#include

#define uchar unsigned char

#define uint unsigned int

sbit dula=P2^6;

sbit wela=P2^7;

sbit rs=P3^5;

sbit lcden=P3^4;

sbit s1=P3^0;

sbit s2=P3^1;

sbit s3=P3^2;

sbit rd=P3^7;

sbit s4=P3^3;

sbit dsds=P1^7;

sbit dsrw=P1^6;

sbit dsas=P1^5;

sbit dscs=P1^4;

sbit dsirq=P3^3;

uchar count,shi,fen,miao,s1num,week=0,i,day=1,yue=1,year1=0,year2,year3,year4;

uchar code table1[]=" 0000-01-01 MON"; //initial display

uchar code table2[]=" 00:00:00";

uchar code table3[7][3]={"MON","TUE","WED","THU","FRI","STA","SUN"}; //Day code

//********Delay function

void delay(uchar z)

{

uchar x,y;

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

for(y=110;y>0;y--);

}

//****Write command function

void write_com(uchar com)

{

rs=0;

lcden=0;

P0=com;

delay(5);

lcden=1;

delay(5);

lcden=0;

}

//****Write data function

void write_data(uchar date)

{

rs=1;

lcden=0;

P0=date;

delay(5);

lcden=1;

delay(5);

lcden=0;

}

//****initialization function

void init()

{

uchar num;

// year=year1+year2*10+year3*100+year4*1000;

wela=0;

dula=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_data(table1[num]);

delay(20);

}

write_com(0x80+0x40);

for(num=0;num<12;num++)

{

write_data(table2[num]);

delay(20);

}

/* TMOD=0x01;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

EA=1;

ET0=1;

TR0=1; */

}

//********Display hours, minutes and seconds

void write_sfm(uchar add,uchar date1)

{

uchar shi,ge;

shi=date1/10;

ge=date1%10;

write_com(add+0x80+0x40);

write_data(0x30+shi);

write_data(0x30+ge);

}

//********Display year, month and day

void write_sfm1(uchar add,uchar date1)

{

uchar shi,ge;

shi=date1/10;

ge=date1%10;

write_com(add+0x80);

write_data(0x30+shi);

write_data(0x30+ge);

}

void key2();

void key3();

//******Keyboard scanning function

void keyscan()

{

rd=0;

if(s1==0) //The first key is pressed

{

delay(5); //************Remove jitter

if(s1==0)

{

s1num++; //***If the first key is not pressed once, s1num will increase by 1

while(!s1);

if(s1num==1) //When pressed once, the cursor stops at the second position and starts flashing, always stops

{

TR0=0;

write_com(0x80+0x40+11);

write_com(0x0f);

}

if(s1num==2) //pressed for the second time, the cursor stops at the digit

{

write_com(0x80+0x40+8);

}

if(s1num==3) //pressed for the third time, the cursor stops at the time position

{

write_com(0x80+0x40+5);

}

if(s1num==4) //pressed for the fourth time, the cursor stops at the position showing the day of the week

{

write_com(0x80+15);

}

if(s1num==5) //pressed for the fifth time, the cursor stops at the position showing the day

{

write_com(0x80+10);

}

if(s1num==6) //pressed for the sixth time, the cursor stops at the position showing the month

{

write_com(0x80+7);

}

if(s1num==7) //When pressed for the seventh time, the cursor stops at the unit digit of the year

{

write_com(0x80+4);

}

if(s1num==8) //pressed for the eighth time, the cursor stops at the tens place

{

write_com(0x80+3);

}

if(s1num==9) //pressed for the ninth time, the cursor stops at the hundreds place

{

write_com(0x80+2);

}

if(s1num==10) //pressed for the tenth time, the cursor stops at the thousandth place

{

write_com(0x80+1);

}

if(s1num==11) //pressed for the eleventh time, the clock starts from the set time

{

s1num=0;

write_com(0x0c);

TR0=1;

}

if(s4==0) //The fourth key is pressed and the clock restarts

{

s1num=0;

write_com(0x0c);

TR0=1;

}

if(s1num!=0)

{

key2();

key3();

}

void key2() //Adjust time plus

{

if(s2==0)

{

delay(5);

if(s2==0)

{

while(!s2);

if(s1num==1)

{

miao++;

if(miao==60)

miao=0;

write_sfm(10,miao);

write_com(0x80+0x40+11);

}

if(s1num==2)

{

fen++;

if(fen==60)

fen=0;

write_sfm(7,fen);

write_com(0x80+0x40+8);

}

if(s1num==3)

{

shi++;

if(shi==24)

shi=0;

write_sfm(4,shi);

write_com(0x80+0x40+5);

}

if(s1num==4)

{

week++;

switch(week)

{

case 0:write_com(0x80+12);