//ICC-AVR application builder : 01.11.2008 18:04:39
// Target : M162
// Crystal: 1.0000Mhz

#include <iom162v.h>
#include <macros.h>

void port_init(void)
{
PORTA = 0x00;
DDRA  = 0x08;
PORTB = 0x00;
DDRB  = 0x00;
PORTC = 0x00;
DDRC  = 0x00;
PORTD = 0x00;
DDRD  = 0x00;
PORTE = 0x00;
DDRE  = 0x00;
}

//TIMER0 initialize - prescale:1024
// WGM: Normal
// desired value: 4Hz
// actual value:  4,002Hz (0,1%)
void timer0_init(void)
{
TCCR0= 0x00; //stop
TCNT0= 0x0C; //set count
OCR0= 0xF4; //set compare value
TCCR0= 0x05; //start timer
}

#pragma interrupt_handler timer0_ovf_isr:iv_TIM0_OVF
void timer0_ovf_isr(void)
{
TCNT0= 0x0C; //reload counter value

PORTA ^= 0x08;
}

//call this routine to initialize all peripherals
void init_devices(void)
{
//stop errant interrupts until set up
CLI(); //disable all interrupts
port_init();
timer0_init();

MCUCR= 0x00;
EMCUCR = 0x00;
//GIMSK= 0x00;
TIMSK= 0x02; //timer interrupt sources
ETIMSK=0x00;
GICR= 0x00;
PCMSK0=0x00;
PCMSK1=0x00;
SEI(); //re-enable interrupts
//all peripherals are now initialized
}

//
void main(void)
{
init_devices();
//insert your functional code here...
}

#include <ioavr.h>
#include <inavr.h>


void timer0_init(void)
{
TCCR0= 0x00; //stop
TCNT0= 0x0C; //set count
OCR0= 0xF4; //set compare value
TCCR0= 0x05; //start timer  
  
  
/*  
TCCR0 = 0x00; //stop             //10mSec
ASSR  = 0x00; //set async mode

//OCR0  = 0x07;
TCCR0 = 0x07; //start timer

TIMSK |= 0x01; //ovf T0 active
*/
}



#pragma vector = TIMER0_OVF_vect
__interrupt void TIMER0_OVF(void)
{
//TCNT0 =  0xB9;    //0x1A; //reload counter value
  PORTA ^= 0x08;
}




void main( void )
{
  DDRA = 0x08;
  
  timer0_init();
  
  TIMSK |= 0x02; //ovf T0 active
  asm("SEI");
  
  while(1);
}