void display(uint8_t *column)
{
uint8_t i;
uint8_t seq;
seq = 0x01;
PORTA=l[bila.x+2];
PORTD=l[bila.y+2];
_delay_ms(PERIOD /(nrCol+1));
for (i = 0; i < nrCol; i++)
{
PORTA = seq;
PORTD = column[i];
_delay_ms(PERIOD /(nrCol+1));
seq = seq << 1;
}
if (go==1) {
beep_once(_B_TIME);
go=0;
}
}
//============================================================================================
// main function
//============================================================================================
void main(void)
{
ADCON1=0b00000110; //set all portA pins as digital I/O
TRISA=0b11001111; //clear bit 4&5 portA as output and set the rest as input
TRISB=0b00000000; //set portB as output
TRISD=0b00000000; //set portD as output
TRISC=0b11110000; //set bit4-7 portC as input(connected to 4 row of keypad)
TRISE=0b00000000; //set portE as output
PORTC=0;
PORTD=0;
RELAY=0;
BUZZER=0;
LED_YELLOW=0;
LED_RED=0;
send_config(0b00001001); //clear display at lcd
send_config(0b00000010); //Lcd Return to home
send_config(0b00000110); //entry mode-cursor increase 1
send_config(0b00001100); //diplay on, cursor off and cursor blink off
send_config(0b00111000); //function
lcd_clr(); //clear LCD
delay(1000); //delay
lcd_goto(0); //initial display
send_string("PLEASE ENTER"); //Display "PLEASE ENTER" on lcd
lcd_goto(20); //Display on 2nd line
send_string("6-DIGIT PASSWORD"); //Display "6-DIGIT PASSWORD" on lcd
while(1)
{ //keypad scanning algorithm
clearrow1(); //Clear 1st output pin and set the others
scancolumn1(); //scan column 1-4
clearrow2(); //Clear 2nd output pin and set the others
scancolumn2(); //scan column
clearrow3(); //Clear 3rd output pin and set the others
scancolumn3(); //scan column
clearrow4(); //Clear 4th output pin and set the others
scancolumn4(); //scan column
if(password_count==6)
{
password_count=0;
if((keyin_char[0]==stalled_char[0])&&(keyin_char[1]==stalled_char[1])&&
(keyin_char[2]==stalled_char[2])&&(keyin_char[3]==stalled_char[3])&&
(keyin_char[4]==stalled_char[4])&&(keyin_char[5]==stalled_char[5])) //compare the keyin value with stalled value to test whether password is correct
{
lcd_clr(); //clear lcd
lcd_goto(0);
send_string("SUCCESS!"); //display SUCCESS
LED_YELLOW=1; //yellow light on
RELAY=1; //relay on
beep_once(); //beep one time
while(1); //infinity loop
}
else
{
lcd_clr(); //clear lcd
lcd_goto(0);
send_string("ERROR!");//display ERROR!
LED_RED=1; //red light on
beep_twice(); //beep two time
while(1); //infinity loop
}
}
}
}
