Reset Value using a parameter

stanford said:

Let's say that I have a data[WIDTH-1:0]. I want to use a parameter in RTL to provide the reset value for this data.

Code:

parameter RESET_VALUE = 5;
logic [WIDTH-1:0] data;

always_ff @(posedge clk)
  if (~reset)
    data <= WIDTH'd (RESET_VALUE);
  else
    ....

How do I make this work syntax wise? Is it even possible?

Thanks!

Click to expand...

stanford said:

I am using systemverilog, and it does not work. Syntax is not correct. Does anyone know how to fix it?

Click to expand...

logic [999:0] myvar;

always (*) begin
    myvar = 'd0;
end

dave_59 said:

There's no need to size the parameter. Verilog/SystemVerilog always pads 0's implicitly.

Code:

parameter RESET_VALUE = 5;
logic [WIDTH-1:0] data;

always_ff @(posedge clk)
  if (~reset)
    data <=RESET_VALUE;
  else
    ....

Click to expand...