Usage of $realtime

SystemVerilog
,
1

Hi,

I want to print the current time of simulation using $realtime.
For e.g.
Let my current simulation timestamp is 96571495 (unit is ps).
When I try to print it as :
$display($realtime);

It prints value : 96571000

How to fix it?

2

Use timeformat:


...
$timeformat(-9, 3, "ns", 8);
//$timeformat params:
//1) Scaling factor (–9 for nanoseconds, –12 for picoseconds)
//2) Number of digits to the right of the decimal point
//3) A string to print after the time value
//4) Minimum field width

$display("%t", $realtime);
3

In reply to svru:
SystemVerilog always scales and rounds the result of $realtime to the local timescale and precision. You need to make sure the time precision of the module, package, or interface where the $display is located is in ps.

4

Hi Sir
I have one doubt in uvm timescale method
i am used the run command in 1ns/10ps so print the value in 10ps.so i can’t understand the ns value

task tCSP_timing_check;
  @(negedge mon_if.CE_N);
      x1=$realtime;
        `uvm_info(get_full_name(),$sformatf("x1:%t",x1),UVM_LOW);
   @(posedge mon_if.CLK);
      x2=$realtime;
        //`uvm_info(get_full_name(),$sformatf("x2:%t",x2),UVM_LOW);
      
     tcsp=x2-x1;
      //@(posedge clk);
          //$display($realtime,"tcsp:%t",tcsp);
         `uvm_info(get_full_name(),$sformatf("tcsp:%t",tcsp),UVM_LOW);

        if(tcsp>=tCSP)begin//2ns
          //$info("CE_N setup realtime to clk rising edge is crt");
             `uvm_info(get_full_name(),$sformatf("CE_N setup realtime to clk rising edge is crt"),UVM_LOW);
        end
        else begin 
          //$error("CE_N setup realtime is violation");
           `uvm_error("tCSP_Error","CE_N setup realtime is violation");
        end
 endtask

In this task how to print in $timeformat method to print ns value

5

Hi Sir,
I have used 1ns/10ps. I want the values to be printed in ps and I can see only ns values.
Please explain me were I am wrong

I have also made changes as per your guidelines

6

In reply to baladevi:

Hi,


  //if you want to print the value in the ns:
  $timeformat(-9, 3, "ns", 8);
//$timeformat params:
//1) Scaling factor (–9 for nanoseconds, –12 for picoseconds)
//2) Number of digits to the right of the decimal point
//3) A string to print after the time value
//4) Minimum field width

  //if you want to print the value in the ps:
  $timeformat(-12, 3, "ps", 8);