class sysreg_driver;

  
  sysreg_trans  	tr;

  //interface
  virtual sysreg_if 	vif;
  virtual spi_if	wif;


  function new();
  endfunction
  extern task do_drive();
  extern task make_intr();

endclass : sysreg_driver 

task sysreg_driver::do_drive();

  fork

    while(1) begin
      make_intr();
    end
     
  join

endtask

task sysreg_driver::make_intr();
  int	cnt=0;

  vif.status	=32'b0;

  cnt = 0;
  

  tr = new();
  if(!tr.randomize())
    $fatal(0,"Randomize Failed");

    
  while(cnt<3000) begin
    @(posedge wif.clk);

    cnt = cnt + 1;
    
    case(cnt)

 	tr.status_time[28]: vif.status[28] <=1'b1;
	tr.status_time[27]: vif.status[27] <=1'b1;
	tr.status_time[26]: vif.status[26] <=1'b1;
	tr.status_time[25]: vif.status[25] <=1'b1;
	tr.status_time[24]: vif.status[24] <=1'b1;
	tr.status_time[19]: vif.status[19] <=1'b1;
	tr.status_time[18]: vif.status[18] <=1'b1;
	tr.status_time[17]: vif.status[17] <=1'b1;
	tr.status_time[16]: vif.status[16] <=1'b1;
	tr.status_time[11]: vif.status[11] <=1'b1;
	tr.status_time[10]: vif.status[10] <=1'b1;
	tr.status_time[ 9]: vif.status[ 9] <=1'b1;
	tr.status_time[ 8]: vif.status[ 8] <=1'b1;
	tr.status_time[ 3]: vif.status[ 3] <=1'b1;
	tr.status_time[ 2]: vif.status[ 2] <=1'b1;
	tr.status_time[ 1]: vif.status[ 1] <=1'b1;
	tr.status_time[ 0]: vif.status[ 0] <=1'b1;
    endcase   
    //$display(vif.status);

    case(cnt-1)
 	tr.status_time[28]: vif.status[28] <=1'b0;
	tr.status_time[27]: vif.status[27] <=1'b0;
	tr.status_time[26]: vif.status[26] <=1'b0;
	tr.status_time[25]: vif.status[25] <=1'b0;
	tr.status_time[24]: vif.status[24] <=1'b0;
	tr.status_time[19]: vif.status[19] <=1'b0;
	tr.status_time[18]: vif.status[18] <=1'b0;
	tr.status_time[17]: vif.status[17] <=1'b0;
	tr.status_time[16]: vif.status[16] <=1'b0;
	tr.status_time[11]: vif.status[11] <=1'b0;
	tr.status_time[10]: vif.status[10] <=1'b0;
	tr.status_time[ 9]: vif.status[ 9] <=1'b0;
	tr.status_time[ 8]: vif.status[ 8] <=1'b0;
	tr.status_time[ 3]: vif.status[ 3] <=1'b0;
	tr.status_time[ 2]: vif.status[ 2] <=1'b0;
	tr.status_time[ 1]: vif.status[ 1] <=1'b0;
	tr.status_time[ 0]: vif.status[ 0] <=1'b0;
    endcase
  end

endtask : make_intr