LCD1602 liquid crystal display DS1302 real-time clock Proteus simulation

Simulation program:

#include

#include

#include

#define uint  unsigned int

#define uchar unsigned char

//*******LCD*******

sbit LCDRS=P2^0; //LCD data/command selection terminal

sbit LCDRW=P2^1;

sbit LCDEN=P2^2; //LCD enables the new terminal

//******DS1302******

sbit IO=P1^0; //1302 data line

sbit SCLK=P1^1; //1302 clock line

sbit RST=P1^2; //Reset

uint num=0;

//uchar week[]={"SUN","***","MON","TUS","WEN","THU","FRI","SAT"};

uchar Date[]={"Date: 2000-00-00 "};

uchar Time[]={"Time: *00:00-00* "};

uchar date_time[7]; //Current date and time read from ds1302

//=======Delay=======

void delay(uint z)

{

uint x,y;

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

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

}

//********Write data to 1302*********

void write_ds1302(uchar dat)

{

flying i;

for(i=0;i<8;i++)

{

IO=dat & 0x01; //Keep the last bit as 1, read status

SCLK=1;

delay(1);

SCLK=0;

that >>= 1;

}

}

//************Read data from 1302*********

uchar read_ds1302()

{

fly i,b=0x00;

for(i=0;i<8;i++)

{

b |= _crol_((fly)IO,i);

SCLK=1;

delay(1);

SCLK=0;

}

return b/16*10+b%16; //Convert to BCD code

}

//************Read data from the specified location********

fly read_data(fly addr)

{

flying dat;

RST=0;

SCLK=0;

RST=1;

write_ds1302(addr);

dat=read_ds1302();

SCLK=1;

RST=0;

return that;

}

//************Read the current date and time*********

void read_date_time()

{

uchar i,addr=0x81;

for(i=0;i<7;i++)

{

date_time[i]=read_data(addr);

addr+=2;

}

}

//----------LCD write instruction----------

void lcd_write_com(uchar com)

{

LCDRS=0; //When RS is 0, write instruction, when RS is 1, write data

P0=com;

delay(5);

LCDEN=1;

delay(5);

LCDEN=0;

}

//----------LCD write data----------

void lcd_write_data(uchar dat)

{

LCDRS=1;

P0=that;

delay(5);

LCDEN=1;

delay(5);

LCDEN=0;

}

//-------LCD initialization-------

void lcd_init()

{

LCDEN=0;

lcd_write_com(0x38); //LCD display mode setting

lcd_write_com(0x0c); //LCD display on/off and cursor setting

lcd_write_com(0x06); //After writing a character, the address pointer increases by 1, and the cursor increases by 1

lcd_write_com(0x01); //Clear the screen

}

//---------Set LCD display position-----------

void set_lcd_pos(uchar p)

{

lcd_write_com(p | 0x80);

}

//---------LCD display program----------

void lcd_print(uchar p,uchar *s)

{

set_lcd_pos(p);

for(num=0;num<16;num++)

{

lcd_write_data(s[num]);

delay(10);

}

}

//----------Date time conversion-----------

void format_datetime(string d, string *p)

{

p[0]=d/10+'0';

p[1]=d%10+'0';

}

//---------Main program--------------

void main()

{

LCDRW=0;

lcd_init();

while(1)

{

read_date_time();

format_datetime(date_time[6],Date+8); // Date

format_datetime(date_time[4],Date+11);

format_datetime(date_time[3],Date+14);

// strcpy(Date+13,week[date_time[5]]);

format_datetime(date_time[2],Time+7); //Time conversion

format_datetime(date_time[1],Time+10);

format_datetime(date_time[0],Time+13);

lcd_print(0x00,Date);

lcd_print(0x40,Time);

}

}