#include <90s2313.h>

// External Interrupt 0 service routine

interrupt [EXT_INT0] void ext_int0_isr(void)
       
        {
        PORTD.3 = 0;    //Notaus aktiv Luft aus
        }


// Declare your global variables here

#define TEIL_EINGELEGT          PIND.0
#define NOTAUS                  PIND.2 
#define NOTAUS_AN               PORTD.3
#define SCHRAUBEN               PORTD.4
#define HOCHFAHREN              PORTD.5

#define RAUF_LED                PORTB.0
#define RUNTER_LED              PORTB.1
#define NOTAUS_LED              PORTB.2


// timouts in "timer"-Einheiten. timer laeuft mit 10Hz = 100ms

#define TIMEOUT		1800

unsigned long timer;

/* Called automatically on TIMER1 output compare */
interrupt [5] void timer1_output_compare(void) {
  timer++;

}
void main(void)
{
// Declare your local variables here

unsigned long runter_timer;

// Input/Output Ports initialization
// Port D initialization
// Func6=In Func5=Out Func4=Out Func3=Out Func2=In Func1=In Func0=In 
// State6=T State5=0 State4=0 State3=0 State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x38;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
TCCR0=0x00;
TCNT0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1 output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
TCCR1A=0x00;
// TCCR1B=0x00;  
// timer mit Output Compare, Vorteiler 1024
TCCR1B = 0x0D;
TCNT1H=0x00;
TCNT1L=0x00;
OCR1H= (16 >> 8);
OCR1L= 16 & 0xFF;
// OCR1H= 0;
// OCR1L= 1;

// External Interrupt(s) initialization
// INT0: On
// INT0 Mode: Rising Edge
// INT1: Off
GIMSK=0x40;
MCUCR=0x03;
GIFR=0x40;

// timer auf 0 setzen vor dem start
timer = 0;

// Timer(s)/Counter(s) Interrupt(s) initialization
// (nur Timer 1 Output Compare aktiviert)
TIMSK=0x40;


// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;


#asm
    sei
#endasm

while (1)
      {       
                                         
       if (TEIL_EINGELEGT == 0)
       {
       runter_timer = timer;
       SCHRAUBEN = 1;
       }
       
                
                if((SCHRAUBEN == 1) && ((timer - runter_timer) > TIMEOUT))
                {
                SCHRAUBEN = 0;
                }                        
                               
} 
}