ATmega32, Taster funktionieren erst, später spinnt der AVR

/*****************************************************

This program was produced by the

CodeWizardAVR V2.03.4 Standard

Automatic Program Generator

© Copyright 1998-2008 Pavel Haiduc, HP InfoTech s.r.l.

http://www.hpinfotech.com

Project : PCOA_1.2

Version : 

Date    : 16.01.2009

Author  : Sascha M

Company :                          

Comments: Drei Schalter steuern je einen Motor. 

          Sensor deaktiviert alle Motoren.

          Real-Time-Clock implementiert, auslesen durch Sensor

Chip type           : ATmega32

Program type        : Application

Clock frequency     : 16,000000 MHz

Memory model        : Small

External RAM size   : 0

Data Stack size     : 512

*****************************************************/

#include <mega32.h>

#include <delay.h>

// I2C Bus functions

#asm

   .equ __i2c_port=0x15 ;PORTC

   .equ __sda_bit=1

   .equ __scl_bit=0

#endasm

#include <i2c.h>

// DS1337 Real Time Clock functions

#include <ds1337.h>

// Standard Input/Output functions

#include <stdio.h>

// Declare your global variables here

#define taster1 2   // PD2 an Pin 16

#define taster2 3   // PD3 an Pin 17

#define taster3 4   // PD4 an Pin 18

#define motor1 5    // LED1 und Testmotor 1

#define motor2 6    // LED2 und Testmotor 2

#define motor3 7    // Summer und Testmotor 3

#define sensor 5    // PC5 an Pin 27

//#define drucke(t) printf(#t)

void main(void)

{

// Declare your local variables here

unsigned char h,m,s,da,mo,ye;

// 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=In Func2=In Func1=In Func0=In 

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 

PORTB=0x00;

DDRB=0x00;

// 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=In Func3=In Func2=In Func1=In Func0=In 

// State7=0 State6=0 State5=0 State4=T State3=T State2=T State1=T State0=T 

PORTD=0x00;

DDRD=0xE0;

// 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

// Timer 1 Overflow Interrupt: Off

// Input Capture Interrupt: Off

// Compare A Match Interrupt: Off

// Compare B Match Interrupt: Off

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: On

// USART Transmitter: On

// USART Mode: Asynchronous

// USART Baud Rate: 9600

UCSRA=0x00;

UCSRB=0x18;

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;

// I2C Bus initialization

i2c_init();

rtc_set_date(16,01,9);

while (1)

      {

      if (PIND &(1<<taster1)) {     

          PORTD |=(1<<motor1);      //LED1 und Testmotor 1 ON

          }

      if (PIND &(1<<taster2)) {    

          PORTD |=(1<<motor2);      //LED2 und Testmotor 2 ON

          }

      if (PIND &(1<<taster3)) {    

          PORTD |=(1<<motor3);      // Summer und Testmotor 3 ON

          }

      if (PINC &(1<<sensor)) {         

          //delay_ms(250);

          PORTD &=~((1<<motor1)|(1<<motor2)|(1<<motor3)); // deaktiviert alle Motoren

          rtc_get_date(&da,&mo,&ye);        // 

          printf("\r%i.%i.200%i",da,mo,ye); // Datum lesen und an UART ausgeben         

          rtc_get_time(&h,&m,&s);           // 

          printf("\r%i:%i:%i\n",h,m,s);     // Zeit lesen und an UART ausgeben

          };

      };    // end while Arbeitsschleife

}           // end main