Problem beim Datenzugriff auf Array für Temperaturauswertung

/

* Header */

#include <avr/io.h>

#include <avr/interrupt.h>

#include <util/delay.h>

/* Defines */

#define BAUD 0x0019 // 38.4kbaud @ 16 Mhz

/* Prototypes */

void USART_Init(void);

void My_Init(void);

void USART_Transmit(unsigned char datu);

void ConfigInCapture1(void);

/* Variables */

unsigned char risel;

unsigned char riseh;

unsigned char zindex;

unsigned char daten[81];

int main(void)

{

  My_Init();

    PORTA=0x01;         // Led nach Reset an

    _delay_ms(2000);

     PORTA=0x00;

    _delay_ms(1000); 

  USART_Init();    

  ConfigInCapture1();

  sei();

  while(1)

  {

    for(unsigned char n=0;n<80;n++)   // funktioniert 1 bis 80

        {  

            USART_Transmit(daten[n]);  

        }

       USART_Transmit(daten[0]); // Funktioniert  nicht !!! 81

       USART_Transmit(daten[1]); // Warum ?

       USART_Transmit(daten[2]);

       USART_Transmit(daten[3]);  //                     bis 84      

       if(daten[0]!=0)           // Warum geht der Zugriff  nicht ?

       {

        PORTA=0x01;         // Led an

       }

     _delay_ms(1000);  

  }

  return 0;

}  

ISR(TIMER1_CAPT_vect)

{   

    // Wert auslesen

    risel = ICR1L;

  riseh = ICR1H;  

    if(zindex<=80) 

  {

    daten[zindex]=riseh;

    zindex++;

    daten[zindex]=risel;

    zindex++;    

  }

  else

  {                  

        TIMSK=0; // Capture AUS

        TIFR =  (1<<ICF1); 

  }

    TCCR1B ^=(1<<ICES1); // Flanke umschalten

}

void ConfigInCapture1(void)

{

  TCCR1A = 0;                      // normal mode, keine PWM Ausgänge

  TCCR1B = (1<<ICES1)|(1<<CS01)|(1<<CS11);      

  TIMSK |= (1<<TICIE1);  //fallendeflanke // input-capture Interrupt aktivieren

  TIFR =  (1<<ICF1);  

}

void My_Init(void)

{

  DDRA=0x01; //Anzeigeausgang

  DDRD=0x80; // Spannung Tempsens 

  PORTD=0x80;// Spannung Tempsens 

  zindex=0;  

    for(unsigned char n=0;n<80;n++)  

    {  

        daten[n]=0;  

    }

}

/* USART initialisieren */

void USART_Init(void)

{

    //8bit - 1 Stopbit  

    UCSRB |= (1<<TXEN)|(1<<RXEN)|(1<<RXCIE);                

    UCSRC |= (1<<URSEL)|(3<<UCSZ0);   

  UBRRH = (unsigned char)(BAUD>>8); //Einstellen Baudrate

  UBRRL = (unsigned char)BAUD;      //Einstellen Baudrate

}

/* Senden */

void USART_Transmit(unsigned char datu)

{

  while ( !(UCSRA & (1<<UDRE)) );

  UDR = datu;

}

.....................................................................

Nur zur Info

> "make.exe" all

-------- begin --------

avr-gcc (WinAVR 20100110) 4.3.3

Copyright (C) 2008 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Size before:

AVR Memory Usage

----------------

Device: atmega16

Program:     470 bytes (2.9% Full)

(.text + .data + .bootloader)

Data:         84 bytes (8.2% Full)

(.data + .bss + .noinit)

Compiling C: main.c

avr-gcc -c -mmcu=atmega16 -I. -gdwarf-2 -DF_CPU=16000000UL -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=./main.lst  -std=gnu99 -MMD -MP -MF .dep/main.o.d main.c -o main.o 

Linking: main.elf

avr-gcc -mmcu=atmega16 -I. -gdwarf-2 -DF_CPU=16000000UL -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=main.o  -std=gnu99 -MMD -MP -MF .dep/main.elf.d main.o --output main.elf -Wl,-Map=main.map,--cref     -lm

Creating load file for Flash: main.hex

avr-objcopy -O ihex -R .eeprom -R .fuse -R .lock main.elf main.hex

Creating load file for EEPROM: main.eep

avr-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" \

  --change-section-lma .eeprom=0 --no-change-warnings -O ihex main.elf main.eep || exit 0

Creating Extended Listing: main.lss

avr-objdump -h -S -z main.elf > main.lss

Creating Symbol Table: main.sym

avr-nm -n main.elf > main.sym

Size after:

AVR Memory Usage

----------------

Device: atmega16

Program:     470 bytes (2.9% Full)

(.text + .data + .bootloader)

Data:         84 bytes (8.2% Full)

(.data + .bss + .noinit)

-------- end --------

> Process Exit Code: 0

> Time Taken: 00:01