///password wrong function
void wrong_password(void)
{
lcd_clear();
lcd_new_msg_first_line();
printf(" Incorrect");
lcd_new_msg_second_line();
printf(" Password");
Delay_ms(2000);
switch(change_request_flag)
{
//if old password was entered wrong
case 1:
lcd_clear();
lcd_new_msg_first_line();
printf(" Enter Old");
lcd_new_msg_second_line();
printf(" Password:"******" Confirm New");
lcd_new_msg_second_line();
printf(" Password:");
break;
}
}
//Overall system initialize function
void sys_init(void)
{
//rows are output & columns are input
ADCON1|=0x0F;
TRISA=0x0F;
TRISE&=0xFC;
TRISC=0xF9; //lcd control pins
TRISD=0x00; //lcd data bus
TRISB=0xFA; //button, LED and door lock actuator
//initilize LEDs
key_press_indicator=0;
door_control=0; //door is locked by default
lcd_init(); //initialize LCD
printf(" Enter");
lcd_new_msg_second_line();
printf(" Password:");
eeprom_init(); //initialize eeprom
//read password from eeprom
for(unsigned char i=0; i<password_length; i++)
{
password[i]=eeprom_rd(i);
}
}
//weather display function
void disp_weather(void)
{
temp=temp_acquire(); //get temp data
lcd_clear();
printf(" Temp: %d C", temp);
//custom character for Celsius symbol
lcd_cmd_transmit(0x40); //go to CGRAM location 0
//send custom character data; CGRAM location increments by 1 automatically with each write
lcd_data_transmit(0x06);
lcd_data_transmit(0x09);
lcd_data_transmit(0x09);
lcd_data_transmit(0x06);
lcd_data_transmit(0x00);
lcd_data_transmit(0x00);
lcd_data_transmit(0x00);
lcd_data_transmit(0x00);
//the above code makes one custom character; we can make & store 7 more like this in the LCD at any given time
//switch back to DDRAM
lcd_cmd_transmit(0x8B);
lcd_cmd_transmit(0x06);
//display custom character at location 0x40; sending 0x01 displays character at location 0x41 & so on
lcd_data_transmit(0x00);
lcd_new_msg_second_line();
printf("Weather: ");
for(unsigned char i=0; i<6; i++)
{
lcd_data_transmit(weather[i]);
}
}
//Password change function
void password_change(void)
{
if(change_request==0)
{
Delay_ms(20);
if(change_request==0)
{
//if password change request is received
if(change_request_flag==0)
{
change_request_flag=1;
lcd_clear();
lcd_new_msg_first_line();
printf(" Enter Old");
lcd_new_msg_second_line();
printf(" Password:"******" Enter");
lcd_new_msg_second_line();
printf(" Password:");
}
button_press_count=0;
Delay_ms(250);
}
}
}
//password entry complete check function
void password_entry_complete_check(void)
{
if(button_press_count>=password_length)
{
password_check(); //verify password entered
button_press_count=0;
if(change_request_flag==0)
{
lcd_clear();
lcd_new_msg_first_line();
printf(" Enter");
lcd_new_msg_second_line();
printf(" Password:");
}
}
}
//password right function
void correct_password(void)
{
/*
*change_request_flag=0 -> normal operation
*change_request_flag=1 -> password change request; old password entered
*change_request_flag=2 -> new password entered
*change_request_flag=3 -> new password confirmed
*/
//transmit correct password message as required
if(change_request_flag!=2)
{
lcd_clear();
lcd_new_msg_first_line();
printf(" Correct");
lcd_new_msg_second_line();
printf(" Password");
Delay_ms(2000);
}
switch(change_request_flag)
{
//welcome_message sent only if password change request was not given & user is simply trying to enter
case 0:
lcd_clear();
lcd_new_msg_first_line();
printf(" Welcome");
lcd_new_msg_second_line();
printf(" Home");
//unlock the door
door_control=1;
Delay_ms(5000);
door_control=0;
break;
//ask for new password
case 1:
lcd_clear();
lcd_new_msg_first_line();
printf(" Enter New");
lcd_new_msg_second_line();
printf(" Password:"******" Confirm New");
lcd_new_msg_second_line();
printf(" Password:");
change_request_flag++;
break;
//new password entering process is finished; reset request flag & remove old password completely from the system
case 3:
for(unsigned char i=0; i<password_length; i++)
{
eeprom_wr(i, password[i]);
}
change_request_flag=0;
break;
}
}
//time display function
void disp_time(void)
{
lcd_clear();
//compensate for some glitches due to single digits
if(time[0]<=9 && time[1]>9)
{
printf(" 0%d:%d", time[0], time[1]);
}
else if(time[0]>9 && time[1]<=9)
{
printf(" %d:0%d", time[0], time[1]);
}
else if(time[0]<=9 && time[1]<=9)
{
printf(" 0%d:0%d", time[0], time[1]);
}
else
{
printf(" %d:%d", time[0], time[1]);
}
lcd_new_msg_second_line();
switch(time[2])
{
case 1:
printf("Sun, ");
break;
case 2:
printf("Mon, ");
break;
case 3:
printf("Tue, ");
break;
case 4:
printf("Wed, ");
break;
case 5:
printf("Thu, ");
break;
case 6:
printf("Fri, ");
break;
case 7:
printf("Sat, ");
break;
default:
asm("NOP");
}
switch(time[4])
{
case 1:
printf("Jan ");
break;
case 2:
printf("Feb ");
break;
case 3:
printf("Mar ");
break;
case 4:
printf("Apr ");
break;
case 5:
printf("May ");
break;
case 6:
printf("Jun ");
break;
case 7:
printf("Jul ");
break;
case 8:
printf("Aug ");
break;
case 9:
printf("Sep ");
break;
case 10:
printf("Oct ");
break;
case 11:
printf("Nov ");
break;
case 12:
printf("Dec ");
break;
default:
asm("NOP");
}
printf("%d,", time[3]);
printf("20%d", time[5]);
}
