Apps in DE2

Hi,

I&#39;m a newbi and i want to know how to create an application with the basic knowledge that i have took in the DE2 tutorial. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/biggrin.gif

I want that my apps put on a green led when a button is on. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/blink.gif I make this C source :

#include <stdio.h># define led_green (char*) 0x009000C0 // Base adress in SOPC Builder# define button_pio (volatile char*) 0x00900120 // Base adress in SOPC Builder
int main(void)
{
    printf("Hello World\n");
    while(1)
    {
          printf("Loop Text Test ")
          *led_green=*button_pio;
    }
     return 0;
}

My program bug at the while, is there anyone who can tell me why ??? http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/huh.gif

Thank you

XR

NB : Sorry for my englihs, i&#39;m french http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif