[verilog] write the answer in .txt using $fwrite

[hoheiho]

Homework Statement

Hi, I am now currently working with a CPU. Now I want to write the RAM's MEM into a .txt file.

reg [31:0] 	mem [ 0 : (32'h0000_5000 / 4)-1 ] 

  // To .txt
   integer  	test_file;
    initial 
    begin
      test_file = $fopen("result_file.txt","w"); 
    end

//the MEM part
   always @ (posedge wb_clk_i)
     begin
	if (ram_we)
	  begin
	  mem[adr] <= wr_data;
	  $fwrite(test_file,"%b\n",mem);    // I have only added this part
	  end  
     end

Then I got an error message : $fwrite : Argument number 3 is an unpacked type, and may only be printed with the '%p' format.

I have tried to change it to %p. But it print out somethings like dec number. I prefer the test_file.txt will got all the binary number from MEM.

Could anyone seen the problem?

Thanks for the help
Ivan

 

[Valkarie]

Homework EquationsN/AThe Attempt at a SolutionIt appears that you are trying to print the binary numbers from the MEM array to a .txt file using the $fwrite function. The third argument of the $fwrite function must be specified with the '%p' format, as the error message suggests. However, the '%p' format prints out decimal numbers, not binary numbers. To solve this issue, you can use a for loop to iterate through each element in the MEM array and use the $fwrite function to print out the binary number associated with that element to the .txt file. For example, the following code should do the trick:initial begin test_file = $fopen("result_file.txt","w"); endalways @ (posedge wb_clk_i)begin if (ram_we) begin mem[adr] <= wr_data; for (int i=0; i<(32'h0000_5000/4); i++) begin $fwrite(test_file,"%b\n",mem); end end end