Randomization of time delay #t us. How to?

OVM
,
1

Hello everyone,

Is it possible to randomize the time delay in order to create random sequences? What I mean is for example,

forever loop
begin
sig_value = 1’b1;
#10ns
sig_value = 1_b0;
# random_delay
end

Can someone shed light on how to do this? Thank you in advance.

2

You can’t randomize time variables directly, but you can randomize an integer and multiply that by your desired time unit:


module top;
  
  initial begin
    int some_rand_delay;
    
    std::randomize(some_rand_delay) with {
      some_rand_delay < 5;
      some_rand_delay > 2;
    };
    
    #(some_rand_delay * 1ns);
    $display("time = ", $time);
    
    $finish();
  end

endmodule