My onw lights example is crashing

Hi.

I created my own example project from a altera introduction pdf to use some buttons and leds. Thats the link to the tutorial ftp://ftp.altera.com/up/pub/altera_material/9.1/tutorials/verilog/introduction_to_the_altera_sopc_builder.pdf. My board is the Altera Cyclone III DK-N2EVAL-3C25N NIOSII Development Board. Here an screenshot of the SOPC builder window.

https://www.alteraforum.com/forum/attachment.php?attachmentid=9119

Generating and compiling of the code works fine.

Here the verilog code:

--- Quote Start ---

module lights (SW, KEY, CLOCK_50, LEDG);

input [3:0] SW;

input [0:0] KEY;

input CLOCK_50;

output [3:0] LEDG;

// Instantiate the Nios II system module generated by the SOPC Builder:

// nios_system (clk, reset_n, out_port_from_the_LEDs, in_port_to_the_Switches)

nios_system NiosII (CLOCK_50, KEY[0], LEDG, SW);

endmodule

--- Quote End ---

In the example are 8 leds and button used, my board has only 4 so I changed that in the sopc builder and in the code to 4 and connected the in/outputs in the pin planer. Took the pin information from another project which works.

https://www.alteraforum.com/forum/attachment.php?attachmentid=9120

My nios code is:

--- Quote Start ---

# include <stdio.h>

# define Switches (volatile char *) 0x0003000# define LEDs (char *) 0x0003010

int main()

{

printf("Hello from Nios II!\n");

while (1)

*LEDs = *Switches;

return 0;

}

--- Quote End ---

But when I run the nios project it crashes with that error message:

--- Quote Start ---

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00

Processor is already paused

Reading System ID at address 0x0C002F40: verified

Initializing CPU cache (if present)

OK

Downloading 05000020 ( 0%)

Downloading 05010000 (26%)

Downloading 05020000 (53%)

Downloading 05030000 (79%)

Downloaded 242KB in 0.6s (403.3KB/s)

Verifying 05000020 ( 0%)

Verifying 05010000 (26%)

Verifying 05020000 (53%)

Verifying 05030000 (79%)assertion "m_state == STATE_DEBUG" failed: file "nios2debug.cpp", line 578.....

--- Quote End ---

I have no idea why. Even when i remove the most stuff and use only a while(1) without anything it crashes.

The reason must be in the quartus part, because the nios c code works with other projects but not with my own example.