/*****************************************************
AVR Core Clock frequency: 8.000000 MHz
*****************************************************/
#include <mega8.h>
#include <alcd.h>
#include <stdio.h>
char s,m,h;
char lcd[16];
interrupt [TIM2_OVF] void timer2_ovf_isr(void)
{
if(++s>=60){
s=0;
m++;
}
if(m>=60){
m=0;
h++;
}
if(h>=24)
h=0;
}
void main(void){
{
// Timer/Counter 2 initialization
// Clock source: TOSC1 pin
// Clock value: PCK2/128
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x08;
TCCR2=0x05;
TCNT2=0x00;
OCR2=0x00;
// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x40;
// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTD Bit 0
// RD - PORTD Bit 1
// EN - PORTD Bit 2
// D4 - PORTD Bit 3
// D5 - PORTD Bit 4
// D6 - PORTD Bit 5
// D7 - PORTD Bit 6
// Characters/line: 16
lcd_init(16);
#asm("sei")
}
while (1)
{
lcd_gotoxy(0,0);
sprintf(lcd,"%02d:%02d:%02d",h,m,s);
lcd_puts(lcd);
}
}
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