MEMBUAT PROGRAM KEYPAD DENGAN CODEVISIONAVR

#include <mega8535.h>

#include <delay.h>

// Alphanumeric LCD Module functions

#asm

   .equ __lcd_port=0x15 ;PORTC

#endasm

#include <lcd.h>

// Declare your global variables here

          unsigned char key;

         

unsigned char keypad()

{

PORTA=0b11111100;

if(PINA.5==0)   return ('1');

if(PINA.6==0)   return ('2');

if(PINA.7==0)   return ('3');

PORTA=0b11111010;

if(PINA.5==0)   return ('4');

if(PINA.6==0)   return ('5');

if(PINA.7==0)   return ('6');     

PORTA=0b11110110;

if(PINA.5==0)   return ('7');

if(PINA.6==0)   return ('8');

if(PINA.7==0)   return ('9');  

PORTA=0b11101110;

if(PINA.5==0)   return ('*');

if(PINA.6==0)   return ('0');

if(PINA.7==0)   return ('#');

}

void main(void)

{

// Declare your local variables here

// Input/Output Ports initialization

// Port A initialization

// Func7=In Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out

// State7=T State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0

PORTA=0xFE;

DDRA=0x1F;

// Port B initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTB=0x00;

DDRB=0x00;

// Port C initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTC=0x00;

DDRC=0x00;

// Port D initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTD=0x00;

DDRD=0x00;

// Timer/Counter 0 initialization

// Clock source: System Clock

// Clock value: Timer 0 Stopped

// Mode: Normal top=FFh

// OC0 output: Disconnected

TCCR0=0x00;

TCNT0=0x00;

OCR0=0x00;

// Timer/Counter 1 initialization

// Clock source: System Clock

// Clock value: Timer 1 Stopped

// Mode: Normal top=FFFFh

// OC1A output: Discon.

// OC1B output: Discon.

// Noise Canceler: Off

// Input Capture on Falling Edge

// Timer 1 Overflow Interrupt: Off

// Input Capture Interrupt: Off

// Compare A Match Interrupt: Off

// Compare B Match Interrupt: Off

TCCR1A=0x00;

TCCR1B=0x00;

TCNT1H=0x00;

TCNT1L=0x00;

ICR1H=0x00;

ICR1L=0x00;

OCR1AH=0x00;

OCR1AL=0x00;

OCR1BH=0x00;

OCR1BL=0x00;

// Timer/Counter 2 initialization

// Clock source: System Clock

// Clock value: Timer 2 Stopped

// Mode: Normal top=FFh

// OC2 output: Disconnected

ASSR=0x00;

TCCR2=0x00;

TCNT2=0x00;

OCR2=0x00;

// External Interrupt(s) initialization

// INT0: Off

// INT1: Off

// INT2: Off

MCUCR=0x00;

MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization

TIMSK=0x00;

// Analog Comparator initialization

// Analog Comparator: Off

// Analog Comparator Input Capture by Timer/Counter 1: Off

ACSR=0x80;

SFIOR=0x00;

// LCD module initialization

lcd_init(16);

while (1)

      {

      // Place your code here

           key=keypad();

           if(key=='1');

           {   

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=1");

           }

            if(key=='2');

           {

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=2");

           }

            if(key=='3');

           {    

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=3");

           }

            if(key=='4');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=4");

           }

            if(key=='5');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=5");

           }

            if(key=='6');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=6");

           }

            if(key=='7');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=7");

           }

            if(key=='8');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=8");

           }

            if(key=='9');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=9");

           }

            if(key=='*');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=*");

           }

            if(key=='#');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=#");

           }

            if(key=='0');

           {         

           lcd_clear();

           lcd_gotoxy(0,0);

           lcd_putsf("keypad=0");

           }

          

          

          

      };

}