About external SRAM

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originally posted by yesdingsheng@Apr 17 2005, 08:47 AM

hi:qxc!

have you done that question?i am now meeting the same with you,i have tried the ways as them said,but i still failed!can you give me some ideas,thanks in advance!

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I have done the experiment using development board that the same as qxc have been described. I added the ram as user logic.My user logic interface file :

module sraminterface(ram_data,ram_addr,ram_we,ram_oe);

inout [31:0]ram_data;

input [15:0]ram_addr;

input ram_we,ram_oe;

endmodule

and my project's top entity file:

module sram(clk,rst,ram_addr,ram_oe,ram_we,ram_data);

input clk,rst;

output ram_we,ram_oe;

output [15:0]ram_addr;

inout [31:0]ram_data;

sramsopc mysram(clk,rst,ram_addr,ram_oe,ram_we,ram_data);

endmodule

my c file is:

# include <stdio.h>

int main()

{

printf("hello from nios ii!\n");

return 0;

}

During the experiment ,I encountered two problem:

1, In my user logic interface file , I set sram address width as 16bits,but in sopc bulilder generated file,it became to 18bits .

2,there is no warning or error but the string displayed on the nios2 console is not "Hello from Nios II!".just some strange code.

I wonder what&#39;s happened.