Programming

#include <pic.h>

#include <htc.h>                                 //required to interface with delay routines

__CONFIG(0x3F32);

#define BCD              PORTA          

#define            LCD_RS RD4                        // Set Port RD4 sebagai sambungan ke RS (Register Select) di LCD

#define LCD_EN RD5                      // Set Port RD5 sebagai sambungan ke EN (Enable) di LCD

#define LCD_DATA PORTD           // Set PortD sebagai data ( tapi dalam kes ini hanya 4 bit DATA

                        // digunakan ( Pin RD0-RD3 disambung kpd pin D4-D7 di LCD)

#define            LCD_PULSE()           (LCD_EN = 1, LCD_EN = 0)

#define _XTAL_FREQ          20000000        //this definition is required to calibrate __delay_us() and __delay_ms()

void pic_init(void);

void lcd_init(void);

void lcd_write(unsigned char c);

void lcd_clear(void);

void lcd_goto(unsigned char pos); //, unsigned char row)

void lcd_string(const char *s);

int read_keypad(void);

void lcd_number(int no, char base, char digit);

main(void)

{

char count=0,data,pass[5],password[5]={"84214"}; //(sila tukar password anda disini)

int i;

int j=0;

pic_init();                                             //initialize PIC

lcd_init();                                            //initialize LCD

__delay_ms(1000);

//__delay_ms(1000);

for(;;){

       

       

            lcd_goto(0x0);

            lcd_string(" Enter Password");

   

     while(RE0!=1)      

      RE0=0; 

if (BCD == 0b1010)

break;

            data=read_data();

            if((data>=1)&(data <=10)){

                        pass[count]=data%10+0x30;

                        lcd_goto(0x44+count);

                        lcd_string("*");

                        count++;}                                                                   

            if(count==5){

                        count=0;

                        for(i=0;i<=4;i++){

                if(pass[i]==password[i])

                count++;}

                        lcd_goto(0x40);

                        if(count==5){ lcd_string("     Welcome");

        RE1=1;

        __delay_ms(5000);

        RE1=0;

        }      

                        else lcd_string("  Wrong password");

                        count=0;

                        __delay_ms(500);

                        lcd_goto(0x40);

                        lcd_string("                ");}

}

}

void pic_init(void)

{

TRISA=0b00001111;

TRISB=0b00000000;

TRISC=0b00000000;

TRISD=0b00000000;

TRISE=0b00000001;

ADCON1=0b00000110;                                //configures the functions of the port pins

PORTA=0b00000000;

PORTB=0b00000000;

PORTC=0b00000000;

PORTD=0b00000000;

PORTE=0b00000000;

}

int read_data(void)

{int i=0;

if (BCD == 0b0001) i=i+1;  // 1

if (BCD == 0b0010) i=i+2;  // 2

if (BCD == 0b0011) i=i+3;  // 3

if (BCD == 0b0100) i=i+4;  // 4

if (BCD == 0b0101) i=i+5;  // 5

if (BCD == 0b0110) i=i+6;  // 6

if (BCD == 0b0111) i=i+7;  // 7

if (BCD == 0b1000) i=i+8;  // 8

if (BCD == 0b1001) i=i+9;  // 9

if (BCD == 0b1010) i=i+11; // *

if (BCD == 0b1010) i=i+10; // 0

if (BCD == 0b1100) i=i+12; // #

 if(i>0) __delay_ms(300);

return i;}

char RS, EN, Temp;

/* write a byte to the LCD in 4 bit mode */

void lcd_write(unsigned char c)

{

            RS = LCD_RS << 4;              // LCD_RS = RD4

            EN = LCD_EN << 5;             // LCD_EN = RD5

            Temp = RS | EN;

            LCD_DATA = ( ( c >> 4 ) | Temp );

            LCD_PULSE();

            LCD_DATA = (( c & 0x0F ) | Temp );

            LCD_PULSE();

            __delay_us(40);

}

/*         Clear and home the LCD */

void lcd_clear(void)

{

            LCD_RS = 0;

            lcd_write(0x1);

            __delay_ms(2);

}

/* write a string of chars to the LCD */

void lcd_string(const char *s)

{

            LCD_RS = 1;  // write characters

            while(*s) lcd_write(*s++);

}

/* write one character to the LCD */

void lcd_putch(char c)

{

            LCD_RS = 1;  // write characters

            lcd_write( c );

}

/* Go to the specified position */

void lcd_goto(unsigned char pos)

{

            LCD_RS = 0;

            lcd_write(0x80+pos);

}

/* go to the specified position

void lcd_goto(unsigned char pos, unsigned char row)

{

LCD_RS=0;

switch(row){

case 0:{lcd_write(0x80+pos);break;}

case 1:{lcd_write(0xC0+pos);break;}

case 2:{lcd_write(0x94+pos);break;}

case 3:{lcd_write(0xD4+pos);break;}}

LCD_RS=1;

} */

 /* initialise the LCD - put into 4 bit mode */

 void lcd_init()

{

            char init_value;

            init_value = 0x3;

           

            TRISD=0;

            LCD_RS = 0;

            LCD_EN = 0;

           

            __delay_ms(15);         // wait 15mSec after power applied,

            LCD_DATA   = init_value;

    LCD_PULSE();

            __delay_ms(5);

    LCD_PULSE();

            __delay_us(200);

            LCD_PULSE();

            __delay_us(200);

            LCD_DATA = 2;       // Four bit mode

            LCD_PULSE();

    lcd_write(0x28); // Set interface length

    lcd_write(0xC); // Display On

            lcd_clear();      // Clear screen

            lcd_write(0x6); // Set entry Mode

}

/* write a number */

void lcd_number(int no, char base, char digit)

{char i,j,di[10];

for(i=0;i<=9;i++) di[i]=0;

i=0;

do{

            di[i]=no%base;

            no=no/base;

            i=i+1;}

while(no!=0);

for(j=digit;j>0;j--){

            if(di[j-1]<=9) lcd_write(di[j-1]+'0');

            else lcd_write(di[j-1]-10+'A');}

}