Run and Debug Problem

Hi Everyone!

I have a problems. Please help me:

I have a SOPC (Nios CPU + SRAM +JTAG UART + SW[7:0] +LEDG[7:0]+Timer) on DE2 board. The C code:

// This code display the value of SW on LEDG# include <stdio.h># include <stdlib.h># define SW (volatile char *) 0x00011000 # define LEDG (char *) 0x00011010

void main()

{ while (1)

*LEDG = *SW;

}

When I run this code, nothing happen (LEDG do not display the value of SW). But when debug this code (step by step), It work correctly.

Please tell me why?

Thanks.