#include <avr/io.h>
#ifndef F_CPU
#define  F_CPU 16000000UL
#endif

#include <avr/delay.h>
#define 	nop()   __asm__ __volatile__ ("nop" ::)
#define RTS(value) { if(value) PORTB |= 1<<PB3; else PORTB &= ~1<<PB3; }
#define A0(value)	 { if(value) PORTB |= 1<<PB0; else PORTB &= ~1<<PB0; }   
#define A1(value)	 { if(value) PORTB |= 1<<PB1; else PORTB &= ~1<<PB1; }    
#define A2(value)	 { if(value) PORTB |= 1<<PB2; else PORTB &= ~1<<PB2; }        
#define NWR(value) { if(value) PORTD |= 1<<PB6; else PORTD &= ~1<<PB6; }       
#define NRD(value) { if(value) PORTD |= 1<<PB5; else PORTD &= ~1<<PB5; }       
#define NCS(value) { if(value) PORTD |= 1<<PB7; else PORTD &= ~1<<PB7; }       
#define RESET(value) { if(value) PORTD |= 1<<PD4; else PORTD &= ~1<<PD4; }



int main()
{
int i;
// Declare your local variables here
// Input/Output Ports initialization
// Port A 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 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=Out Func2=Out Func1=Out Func0=Out 
// State7=T State6=T State5=T State4=T State3=0 State2=0 State1=0 State0=0 
PORTB=0x00;
DDRB=0x0F;

// 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=0x00;
DDRC=0x00;

// Port D initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=In Func2=In Func1=In Func0=In 
// State7=0 State6=0 State5=0 State4=0 State3=T State2=T State1=T State0=T 
PORTD=0x10;
DDRD=0xF0;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// 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
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: Off
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x08;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x67;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// Global enable interrupts
//#asm("sei")  
 
//Initialisieren  
_delay_ms(500);
RESET(0);      
_delay_ms(100);
RESET(1);
_delay_us(100);

RTS(1);  
nop();//#asm("nop") 
A0(1);
A1(0);
A2(0);
nop();//#asm("nop") 
NWR(1);
NRD(1);
NCS(1);
nop();//#asm("nop")
 

//lesen
NRD(0);
A0(0);
A1(0);
A2(0);
for (i=0;i<=50;i++)
  {
  nop();//#asm("nop")   
  } 
UDR=PINC; 
NRD(1);

	while(1)
	{
	}

}