Contoh potongan akses PIN <C>

*****************************************************/
eeprom char password[]="123456#";
#include <mega8515.h>

// Alphanumeric LCD Module functions
#include <alcd.h>

// Standard Input/Output functions
#include <stdio.h>
#include <delay.h>
int status,sms_mark;
char pin_buff[10];
char key,pass_count,pass[10];

void read_pin(void);
void pass_(void);



void main(void)
//........
//.......

while (1)
      {
      // Place your code here

      lcd_gotoxy(0,1);
      //lcd_putchar(i+48);
      if(PINC.2==0){
        status=0;
        beep();
        delay_ms(100);
        beep();
        while(PINC.2==0){}
        delay_ms(100);
        while(PINC.2==0){}

        PORTC.1=0;// solenoid off
        sms_mark=1;
        lcd_clear();
        lcd_puts("Alarm non aktif");
        }

      if(PINC.3==0){
        lcd_clear();

        beep();
        while(PINC.3==0){}
        delay_ms(100);
        while(PINC.3==0){}
        status=1;
        delay_ms(20);
        lcd_puts("Alarm aktif");
        }

      if(status && PINC.4==1){
        beep();
        PORTC.1=1;// solenoid on
        if(sms_mark==1) {
            sms_tx("089656644591","Gawat, ada maling masuk!");
            lcd_puts("Alarm aktif");
            sms_mark=0;

        }
      }
      read_pin();  // panggil rutin
      //pass_();
      }    //---------     loop
}  //============ end

void read_pin(void)
{

    key=get_key();
    if(key != '-')
        {
        lcd_putchar(key);
        if(key=='#'){
            while(1){
                key_up();
                key=get_key();
                if(key=='#'){
                    lcd_clear();
                    status=1;
                    sms_mark=1;
                    delay_ms(20);
                    lcd_puts("Alarm aktif");
                    beep();
                    break;
                    }
                else
                if(key=='*')break;
                }
            }
            else if(key!='-'){
            pass_count=0;
            pass[pass_count++]=key;
            pass_();
            key_up();
          }


        }
    key_up();

}

//================
void pass_(void)
{
    //char key,pass_count,pass[10];
    key_up();
    while(1){
        key=get_key();
        if(key!='-'){
           pass[pass_count++]=key;
           key_up();
           if(key=='#') break;
        }
        //
    }

    pass_count=0;
    while(1){
        if(password[pass_count] != pass[pass_count]){
            lcd_gotoxy(0,1);
            lcd_puts("Password error   ");
            delay_ms(2000);
            lcd_gotoxy(0,1);
            lcd_puts("                 ");
            break;
        }
        if(password[pass_count]=='#'){
            status=0;
            PORTC.1=0;// solenoid off
            sms_mark=1;
            lcd_clear();
            lcd_puts("Alarm non aktif");
            beep();
            delay_ms(30);
            beep();
            break;
        }
        pass_count++;
    }


}