Passing .hex file to RTL

SystemVerilog
,
1

Hi ,

Good Day :)
I am trying to pass HEX file to RTL via a parameter
RTL file

module xyz # (
 parameter HEX_FILE = "RTL_HEX_FILE"
) (
 input clk
);

TB top

module tb_top;
 xyz #(
 .HEX_FILE("DV_HEX_FILE")
) dut(
 .clk(clk)
);

Question - If I pass direct path(out_test/123/hex_file.hex) then my code is working, but If I give the dynamic path like $OUT/$SEED/.hex, then my code is not working.

Thanks & Regards,
Saikrishna

2

In reply to Saikrishna B:
Understanding syntax like “$SEED” is shell variable syntax, not SystemVerilog. You will need to have the shell script that invokes your tool expand the variables before passing it on to your tool.

3

Hi Dave ,

Thanks for the reply,

TB TOP-

module tb_top;
string dv_init_file;
 xyz #(
 .HEX_FILE(dv_init_file)
) dut(
 .clk(clk)
);
initial begin
  $value$plusargs("INIT_FILE=%s",dv_init_file);
  $display("TB_TOP: DV INIT FILE 1 PATH : %s",dv_init_file);
end

I am trying to get the INIT_FILE from my script as a run time variable and passing the path to a parameter , now I am seeing a compile error,

Error-[NCE] Non-constant expression
The following expression should be a constant.
Expression: dv_init_file
“tb_top”,
Source info: .HEX_FILE (dv_init_file),

without passing dv_init_file to DUT, I am able to see the path of my hex file from the print, but only the issue is if I parse that to DUT then I am seeing the error.

Thanks & regards,
Saikrishna B

4

In reply to Saikrishna B:

Parameters cannot be set with values evaluated at run-time.

You can compile your code with a +define+INITFILE=“filename”

and then in your testbench

module tb_top;
string dv_init_file;
 xyz #(
 .HEX_FILE(`INIT_FILE)
) dut(
 .clk(clk)
);

Getting your tool to recognize “filename” as a string literal is going to be shell and tool specific.

This Mentor/Siemens EDA sponsored public forum is not for discussing tool specific usage or issues. Please read your tool’s user manual or contact your tool vendor directly for support.

5

In reply to dave_59:

Hi Dave,

Thanks for your reply, Issue resolved

`define STRCONCAT(s1,s2) `"s1``s2`"
module tb_top;
localparam INIT_FILE = `STRCONCAT(`PWD,init_file.hex);

 xyz #(
 .HEX_FILE(INIT_FILE)
) dut(
 .clk(clk)
);

I am driving PWD from my tool define.

Thanks & regards,
Saikrishna B