[Discuss-gnuradio] Icarus simulation help

[Sebastiaan Heunis]

Hi

I want to write a testbench for phase_acc.v to help me to get started
in simulating the whole decimation scheme.  So this is the phase_acc.v
file:

module phase_acc
(clk,reset,enable,strobe,serial_addr,serial_data,serial_strobe,phase);
   `include "setting_reg.v"
   parameter FREQADDR = 0;
   parameter PHASEADDR = 0;
   parameter resolution = 32;

   input     clk, reset, enable, strobe;
   input [6:0] serial_addr;
   input [31:0] serial_data;
   input        serial_strobe;

   output reg [resolution-1:0] phase;
   wire [resolution-1:0] freq;

   setting_reg #(FREQADDR)
sr_rxfreq0(.clock(clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(freq));

   always @(posedge clk)
     if(reset)
       phase <= #1 32'b0;
     else if(serial_strobe & (serial_addr == PHASEADDR))
       phase <= #1 serial_data;
     else if(enable & strobe)
       phase <= #1 phase + freq;

endmodule // phase_acc

I've looked at quite a few icarus and gtkwave examples.  I would just
like to know how I do the whole

setting_reg #(FREQADDR)
sr_rxfreq0(.clock(clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(freq));

part.  Setting_reg's verilog code is in setting_reg.v.  How do I write
a testbench for the phase accumulator so that the line where
sr_rxfreq0 is instantiated works?  Obviously I'll only have this:
module phase_acc
(clk,reset,enable,strobe,serial_addr,serial_data,serial_strobe,phase);
in my testbench file.  When I try to compile it, I get the following
error:

phase_acc.v:41: error: Unknown module type: setting_reg
Elaboration failed
*** These modules were missing:
        setting_reg referenced 1 times.
***

I've tried adding 'include "setting_reg.v" in phase_acc.v, but then I
get the following error:

setting_reg.v:3: syntax error
setting_reg.v:3: error: invalid module item. Did you forget an initial
or always?
phase_acc.v:29: syntax error

Thank you very much.

Sebastiaan