[VuaHoa]

Người huynh đệ, ngươi viết cẩu thả quá. Sai nhiều chỗ. Xem lại nhé:

#include <16f877a.h>

#device adc=8
#fuses nowdt,noprotect,put,xt
#use delay(clock=4000000)

#include <lcd.c>

#byte portb=0x06
#byte portd=0x08
#bit b0=portb.0
#bit b1=portb.1
#bit b2=portb.2
#bit b3=portb.3
#bit b4=portb.4
#bit b5=portb.5
#bit b6=portb.6
#bit b7=portb.7

int8 ch, pass;

void dat_pass();
void enter();
int8 get_pass();
void set_new_pass();

void kt_1()
{
    int8 kt;
    
    if(b5 == 0)
    { 
        delay_ms(10);
        if (b5 == 0);
        {
            kt = read_eeprom(0x00);
            if (kt == 0) 
                dat_pass();
            else      
                set_new_pass();
        }
    }
    if(b6 == 0)
    {
        delay_ms(10);
        if (b6 == 0)
            enter();
    }
}

void dat_pass()
{
    lcd_gotoxy(0, 1);
    lcd_putc("type your pass:");
    delay_ms(100);
    pass=get_pass();
    write_eeprom(0x00, pass);
    delay_ms(10);
    lcd_gotoxy(11, 1);
    lcd_putc("Great!!");
}

void set_new_pass()
{
    lcd_gotoxy(2, 1);
    lcd_putc("type old pass:");
    delay_ms(100);
    pass = get_pass();
    if (pass == read_eeprom(0x00))
    {
        delay_ms(10);
        lcd_gotoxy(4, 1);
        lcd_putc("New pass:");
        delay_ms(100);
        pass = get_pass();
        write_eeprom(0x00, pass);
        lcd_gotoxy(11, 1);
        lcd_putc("Great!!");
        delay_ms(100);
    }
    else 
    {
        lcd_gotoxy(7, 1);
        lcd_putc("Wrong pass!");
        delay_ms(100);      
    }
}

void enter()
{
    lcd_gotoxy(3, 1);
    lcd_putc("Password??");
    delay_ms(100);
    pass = get_pass();
   
    if(pass == read_eeprom(0x00))
    {
        lcd_gotoxy(4, 1);
        lcd_putc("You're welcom");
        delay_ms(100);      
    }
    else
    {
        lcd_gotoxy(7, 1);
        lcd_putc("Wrong pass!");
        delay_ms(100);      
    }
}

int8 get_pass()
{
    int8 pass;  
   
    if (b0 == 0)
    {
        delay_ms(10);
        if(b0 == 0)
            pass = 0x00;
    }
    if (b1 == 0)
    {
        delay_ms(10);
        if (b1 == 0)
            pass = 0x01;
    }
    if (b2 == 0)
    {
        delay_ms(10);
        if (b2 == 0)
            pass = 0x02;
    }
    if (b3 == 0)
    {
        delay_ms(10);
        if (b3 == 0)
            pass = 0x03;
    }
    return pass;
}
      
void ghi_eeprom(int8 ch)
{
    write_eeprom(0x00, ch);
}

int8 doc_eeprom()
{
    int8 ch;
   
    ch = read_eeprom(0x00);
    return ch;
}

void main()
{
    set_tris_d(0);
    set_tris_b(0xff);
    lcd_init();
   
    lcd_gotoxy(4, 1);
    lcd_putc("Welcom(^-^)");
}