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AVR KeyPad 3×4

March 3rd, 2010 nashrul Leave a comment Go to comments

#include <mega324.h> #include <delay.h> #include <stdio.h> //mulai inisialisai PIN Key Pad #define kolom1 PORTA.0 // out 1 #define kolom2 PORTA.1 #define kolom3 PORTA.2

#define baris1   PINA.4               // in       Pull
#define baris2   PINA.5
#define baris3   PINA.6
#define baris4   PINA.7

unsigned char tombol,kolom,x; // variabel tombol u/ simpan hasil yg ditekan (dalam kode Ascii)
void cek_baris() // 48 adalah konversi tampilan charakter
{
if (baris1 == 0)
{
tombol = kolom + 48;
x=1;
}
else if (baris2==0)
{
tombol=kolom+3+48;
x=1;
}
else if (baris3==0)
{
tombol=kolom+6+48;
x=1;
}
else if (baris4==0)
{
tombol=kolom+9+48;
x=1;
}
else
{
tombol=0;
x=0;
}
if (tombol==58) tombol=42; //*
if (tombol==59) tombol=48; //0
if (tombol==60) tombol=35; //#
}

void scan_keypad()
{
x=0;
while(x==0)
{
kolom1=0;kolom=1;
cek_baris();
kolom1=1;
if (tombol==0)
{
kolom2=0;kolom=2;
cek_baris();
kolom2=1;
}
if(tombol==0)
{
kolom3=0;kolom=3;
cek_baris();
kolom3=1;
}
};
delay_ms(100);
}
void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=Out Func1=Out Func0=Out
// State7=P State6=P State5=P State4=P State3=T State2=1 State1=1 State0=1
PORTA=0xF7;
DDRA=0×07;

// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=1 State6=1 State5=1 State4=1 State3=1 State2=1 State1=1 State0=1
PORTB=0xFF;
DDRB=0xFF;

// 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=0×00;
DDRC=0×00;

// 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=0×00;
DDRD=0×00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0A output: Disconnected
// OC0B output: Disconnected
TCCR0A=0×00;
TCCR0B=0×00;
TCNT0=0×00;
OCR0A=0×00;
OCR0B=0×00;

// 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=0×00;
TCCR1B=0×00;
TCNT1H=0×00;
TCNT1L=0×00;
ICR1H=0×00;
ICR1L=0×00;
OCR1AH=0×00;
OCR1AL=0×00;
OCR1BH=0×00;
OCR1BL=0×00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2A output: Disconnected
// OC2B output: Disconnected
ASSR=0×00;
TCCR2A=0×00;
TCCR2B=0×00;
TCNT2=0×00;
OCR2A=0×00;
OCR2B=0×00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
// Interrupt on any change on pins PCINT0-7: Off
// Interrupt on any change on pins PCINT8-15: Off
// Interrupt on any change on pins PCINT16-23: Off
// Interrupt on any change on pins PCINT24-31: Off
EICRA=0×00;
EIMSK=0×00;
PCICR=0×00;

// Timer/Counter 0 Interrupt(s) initialization
TIMSK0=0×00;
// Timer/Counter 1 Interrupt(s) initialization
TIMSK1=0×00;
// Timer/Counter 2 Interrupt(s) initialization
TIMSK2=0×00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0×80;
ADCSRB=0×00;

while (1)
{
// Place your code here

scan_keypad();

if (tombol==’1′) PORTB=0×10;    // Contoh pemakaian void scan_keypad()
if (tombol==’2′) PORTB=0×20;    // Jika terjadi Bounching pada penekanan Keypad,
if (tombol==’3′) PORTB=0×30;    // coba atur nilai delay pada void scan_keypad()
if (tombol==’4′) PORTB=0×40;
if (tombol==’5′) PORTB=0×50;    // Salam Kanggo arek2
if (tombol==’6′) PORTB=0×60;
if (tombol==’7′) PORTB=0×70;
if (tombol==’8′) PORTB=0×80;
if (tombol==’9′) PORTB=0×90;
if (tombol==’*') PORTB=0xA0;
if (tombol==’0′) PORTB=0xB0;
if (tombol==’#') PORTB=0xC0;
};
}

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