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SmartHome.c
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SmartHome.c
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// Label: RFID with LCD
// Description: This code reads RFID card number from UART and displays it on LCD
// LCD pin definitions
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D4 at RB0_bit;
// Pin direction
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D7_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB0_bit;
// initailzations
char cardnumber[14];
int i;
float ldr;
void Rotation0();
void Rotation180();
void Rotation90();
void init_home();
void AlertBuzzer();
void defualtLCD();
void main() {
init_home();
while (1) {
// Scan RFID card (Phase 1)
if (UART1_Data_Ready()) {
// memset(cardnumber, 0, sizeof(cardnumber));
UART1_Read_Text(cardnumber, ".",14);
Lcd_Out(1, 1, " Card Detected!");
Lcd_Out(2,4,cardnumber); // Print RFID number on LCD
delay_ms(2000);
if (cardnumber[0] == '1'){
Lcd_Out(2, 1, " Welcome Home!");
PORTD.B7 = 1; // turn on green led
PORTD.B4 = 1; // turn on buzzer
delay_ms(1000);
PORTD.B4 = 0; // turn off buzzer
Rotation180();
delay_ms(2000);
Rotation90();
} else if (cardnumber[0] == '2'){
Lcd_Out(2, 1, " Access Denied!");
PORTD.B7 = 0;
PORTD.B6 = 1;
AlertBuzzer();
PORTD.B6 = 0;
}
delay_ms(1000);
// Clean the card number by resetting the array
memset(cardnumber, 0, sizeof(cardnumber));
Lcd_Cmd(_LCD_CLEAR);
defualtLCD();
}
// Fire Alarm (Phase 2)
if (PORTB.B6 == 1) {
// Turn on the blue LED
PORTD.B5 = 1;
// Turn on Fan
PORTD.B3 = 1;
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1, 1, "Fire Alarm!");
Lcd_Out(2, 1, "Evacuate Now!");
// Turn on the buzzer
PORTD.B4 = 1;
delay_ms(1000);
PORTD.B4 = 0;
Lcd_Cmd(_LCD_CLEAR);
defualtLCD();
} else {
// Turn off the LED
PORTD.B5 = 0;
// Turn off Fan
PORTD.B3 = 0;
}
// Laser Alert (Phase 3)
ldr = ADC_Read(0);
if (ldr < 850){
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,1,"Thief detected!!");
Lcd_Out(2,1,"Call 911");
for (i=0;i<3;i++){
PORTD.B4 = 1;
PORTD.B5 = 1;
PORTD.B6 = 1;
PORTD.B7 = 1;
delay_ms(200);
PORTD.B4 = 0;
PORTD.B5 = 0;
PORTD.B6 = 0;
PORTD.B7 = 0;
}
Lcd_Cmd(_LCD_CLEAR);
defualtLCD();
}
}
}
void init_home(){
// set port D as output
TRISD = 0x00;
PORTD = 0x00;
// set Flame sensor to input
TRISB.B6 = 1;
uart1_init(9600);
Delay_ms(100); // Wait for UART module to stabilize
Rotation0();
Lcd_Init(); // Initialize LCD
Delay_ms(100); // Wait for UART module to stabilize
ADC_Init();
Delay_ms(100); // Wait for UART module to stabilize
Lcd_Cmd(_LCD_CLEAR);
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Out(1, 1, " Happy House");
}
void AlertBuzzer(){
for (i = 0; i < 4;i++){
PORTD.B4 = 1;
Delay_ms(50);
PORTD.B4 = 0;
Delay_ms(50);
}
}
void defualtLCD(){
PORTD = 0x00;
Lcd_Out(1, 1, " Happy House");
}
void Rotation0() // 0 Degree
{
unsigned int i;
for (i = 0; i < 50; i++)
{
PORTD.B2 = 1;
Delay_us(1000); // pulse of 800us
PORTD.B2 = 0;
Delay_us(19000);
}
}
void Rotation90() // 180 Degree
{
unsigned int i;
for (i = 0; i < 50; i++)
{
PORTD.B2 = 1;
Delay_us(1500); // pulse of 2200us
PORTD.B2 = 0;
Delay_us(18500);
}
}
void Rotation180() // 180 Degree
{
unsigned int i;
for (i = 0; i < 50; i++)
{
PORTD.B2 = 1;
Delay_us(2000); // pulse of 2200us
PORTD.B2 = 0;
Delay_us(18000);
}
}