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/***************************************************************************
File : keypad-4x4-int-timer.c
Description : Main module
Project : Keypad Matrix 4x4 Auto Scan (Interrupt Timer)
Version : 1.1.5
Author : nashrul@nashrul.co.cc
Date : 2006 - 2008
***************************************************************************/

#include <mega16.h>
#include <lcd.h>
#include <delay.h>
#include <stdio.h>
#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
#asm
.equ __lcd_port=0×18 ;PORTB
#endasm
char buf[17];
unsigned char sss, ss, mm, tt, key, old_key, temp_tt, temp_mm, temp_ss;
int menu_state = 0;
int time_state = 1;
int top_lcd = 0;
int trip = 4530;
int blink;
int bottom_lcd = 0;
int pulses = 0;
interrupt [TIM0_OVF] void timer0_ovf_isr(void)
{}
interrupt [TIM1_COMPA] void timer1_compa_isr(void)
{sss++;
if (sss>5){blink=0;}
if (sss=10){ss++;sss=0;blink = 1;}
if (ss==60){mm++;ss=0;}
if(mm==60) {tt++;mm=0;}
if (tt==24){tt=0;}
}

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(10);
}
void lcd_top()
{
if (top_lcd == 3)
top_lcd = 0;

switch (top_lcd)
{
case 0: // KELLO
lcd_gotoxy(0,0);
if (time_state == 0)
{
if (blink == 1)
sprintf(buf,”%02d-%02d-%02d”, temp_tt, temp_mm, temp_ss);
if (blink == 0)
sprintf(buf,”%02d %02d %02d”, temp_tt, temp_mm, temp_ss);
}
if (time_state == 1)
{
sprintf(buf,”%02d-%02d-%02d”, tt, mm, ss);
}
lcd_puts(buf);
break;
case 1: // TRIP
lcd_gotoxy(0,0);
sprintf(buf,” %5d”, trip);
lcd_puts(buf);
break;
case 2: // REITTI
lcd_gotoxy(0,0);
lcd_putsf(“L-1 25″);
}
}
void main(void)
{
PORTA=0xF0;
DDRA=0xF0;
PORTB=0×00;
DDRB=0×00;
PORTC=0×00;
DDRC=0×00;
PORTD=0×00;
DDRD=0×00;

TCCR0=0×01;
TCNT0=0×00;
OCR0=0×00;

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;

ASSR=0×00;
TCCR2=0×00;
TCNT2=0×00;
OCR2=0×00;

MCUCR=0×00;
MCUCSR=0×00;

TIMSK=0×11;

ACSR=0×80;
SFIOR=0×00;

// LCD module initialization
lcd_init(16);

// Global enable interrupts
#asm(“sei”)

for (;;)
{

};
}

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