Home_security_system

Home_security_system:

Code:

#define F_CPU 8000000UL
#include <avr/io.h>
#include <util/delay.h>

void lcdcmd(char);
void lcddata(char);
void lcdcmdwrite();
void lcddatawrite();
void lcdstring(char *);

void serial_init()
{
  UCSRB=0x18;
  UCSRC=UCSRC|(1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0);
  UBRRL= 0x33;
}

void send(char item)
{
UDR=item;
while(!(UCSRA & (1<<UDRE)));
UCSRA|=1<<UDRE;
}

void serial_tx(char *str)
{
while(*str)
{
send(*str);
str++;
}
}

void lcd_init()
{
  lcdcmd(2);
  lcdcmd(0x28);
  lcdcmd(0x0e);
  lcdcmd(0x06);
}

void defualt()
{
_delay_ms(5000);
lcdcmd(1);
lcdstring("System Ready");
}

int main()
{
DDRA=0xff;
int j=0,k=0;
DDRB=0xff;
serial_init();
lcd_init();
// serial_tx("ATE0");
// send(0x0d);
// _delay_ms(300);
serial_tx("AT+CMGF=1");
send(0x0d);
_delay_ms(300);
serial_tx("AT+CNMI=2,2,0,0,0");
send(0x0d);
_delay_ms(300);
lcdcmd(1);
lcdstring("GSM Project");
_delay_ms(2000);
serial_tx("AT+CMGS=\"+918826387380\"");
send(0x0d);
_delay_ms(200);
serial_tx("System Ready....");
send(0x0d);
_delay_ms(500);
send(26);
lcdcmd(0xc0);
lcdstring("system Ready");
lcdcmd(0x01);
    while(1)
    {
do
{
lcdcmd(0x80);
lcdstring("System Ready....");
}
while(!(PIND &(1<<7)));
 {
     PORTC|=(1<<2);
 PORTC|=(1<<1);
 lcdcmd(1);
 lcdstring("Someone in your");
 lcdcmd(0xc0);
 lcdstring("     Place    ");
 serial_tx("at+cmgf=1");
 send(0x0d);
 _delay_ms(200);
 PORTC&=~(1<<2);
 serial_tx("AT+CMGS=\"+918888888888\"");
 send(0x0d);
 _delay_ms(200);
 PORTC|=(1<<2);
 serial_tx("Someone in your place........");
 send(0x0d);
 _delay_ms(200);
 PORTC&=~(1<<2);
 serial_tx("Please secure your place soon.... Thank You... ");
 send(0x0d);
 _delay_ms(200);
 send(26);
 PORTC|=(1<<2);
 _delay_ms(500);
 PORTC&=~(1<<2);
 PORTC&=~(1<<1);
 PORTC&=~(1<<0);
 _delay_ms(10000);
 lcdcmd(1);
 }
     }
 }

void lcdstring(char *str)
{
while(*str)
{
lcddata(*str);
_delay_ms(10);
str++;
}
}
void lcdcmd(char x)
{
PORTB=x & 0xf0;
lcdcmdwrite();
PORTB=(x<<4) & 0xf0;
lcdcmdwrite();
}
void lcdcmdwrite()
{
PORTB=PORTB&~(1<<0);
PORTB=PORTB&~(1<<1);
PORTB=PORTB|(1<<2);
_delay_ms(1);
PORTB=PORTB&~(1<<2);
_delay_ms(1);
}
void lcddata(char x)
{
PORTB=x & 0xf0;
lcddatawrite();
PORTB=(x<<4) & 0xf0;
lcddatawrite();
}
void lcddatawrite()
{
PORTB=PORTB|(1<<0);
PORTB=PORTB&~(1<<1);
PORTB=PORTB|(1<<2);
_delay_ms(1);
PORTB=PORTB&~(1<<2);
_delay_ms(1);
}

Simulation: