class sysreg_driver;

  
  sysreg_trans  	tr;

  //interface
  virtual sysreg_if 	vif;
  virtual spi_if	wif;

  int			pktnum;


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

endclass : sysreg_driver 

task sysreg_driver::do_drive();
  int	pkt_i = 0;

  fork
    while(1) begin
      if(pkt_i == pktnum) break;
      make_intr();
    end
  
    repeat(pktnum) begin: kill_progress
      @(negedge wif.csn);
      pkt_i++;
    end   
  join

endtask

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

  vif.pll_lock			=1'b0;
  vif.pll_lost_lock		=1'b0;
  vif.ch0_dbg_upd 		=1'b0;
  vif.ch0_dbg_fifo_e		=1'b0;
  vif.ch0_dbg_fifo_f		=1'b0;
  vif.ch0_ldst_addr_unalgn	=1'b0;
  vif.ch0_dec_err		=1'b0;
  vif.ch0_exit_irq 		=1'b0;
  vif.ch1_dbg_upd  		=1'b0;
  vif.ch1_dbg_fifo_e    	=1'b0;
  vif.ch1_dbg_fifo_f    	=1'b0;
  vif.ch1_ldst_addr_unalgn  	=1'b0;
  vif.ch1_dec_err           	=1'b0;
  vif.ch1_exit_irq          	=1'b0;
  vif.ch2_dbg_upd           	=1'b0;
  vif.ch2_dbg_fifo_e        	=1'b0;
  vif.ch2_dbg_fifo_f        	=1'b0;
  vif.ch2_ldst_addr_unalgn  	=1'b0; 
  vif.ch2_dec_err           	=1'b0;
  vif.ch2_exit_irq          	=1'b0;
  vif.ch3_dbg_upd           	=1'b0; 
  vif.ch3_dbg_fifo_e        	=1'b0;
  vif.ch3_dbg_fifo_f        	=1'b0;
  vif.ch3_ldst_addr_unalgn  	=1'b0;
  vif.ch3_dec_err           	=1'b0;
  vif.ch3_exit_irq          	=1'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.pll_lock_time:
	  vif.pll_lock 			<=1'b1;
	tr.pll_lost_lock_time:
	  vif.pll_lost_lock		<=1'b1;
	tr.ch0_dbg_upd_time:
	  vif.ch0_dbg_upd		<=1'b1;
	tr.ch0_dbg_fifo_e_time:
	  vif.ch0_dbg_fifo_e		<=1'b1;
	tr.ch0_dbg_fifo_f_time:
	  vif.ch0_dbg_fifo_f		<=1'b1;
	tr.ch0_ldst_addr_unalgn_time:
	  vif.ch0_ldst_addr_unalgn	<=1'b1;
	tr.ch0_dec_err_time:
	  vif.ch0_dec_err		<=1'b1;
	tr.ch0_exit_irq_time:
	  vif.ch0_exit_irq		<=1'b1;
	tr.ch1_dbg_upd_time:
	  vif.ch1_dbg_upd		<=1'b1;
	tr.ch1_dbg_fifo_e_time:
	  vif.ch1_dbg_fifo_e		<=1'b1;
	tr.ch1_dbg_fifo_f_time:
	  vif.ch1_dbg_fifo_f		<=1'b1;
	tr.ch1_ldst_addr_unalgn_time:
	  vif.ch1_ldst_addr_unalgn	<=1'b1;
	tr.ch1_dec_err_time:
	  vif.ch1_dec_err		<=1'b1;
	tr.ch1_exit_irq_time:
	  vif.ch1_exit_irq		<=1'b1;
	tr.ch2_dbg_upd_time:
	  vif.ch2_dbg_upd		<=1'b1;
	tr.ch2_dbg_fifo_e_time:
	  vif.ch2_dbg_fifo_e		<=1'b1;
	tr.ch2_dbg_fifo_f_time:
	  vif.ch2_dbg_fifo_f		<=1'b1;
	tr.ch2_ldst_addr_unalgn_time:
	  vif.ch2_ldst_addr_unalgn	<=1'b1;
	tr.ch2_dec_err_time:
	  vif.ch2_dec_err		<=1'b1;
	tr.ch2_exit_irq_time:
	  vif.ch2_exit_irq		<=1'b1;
	tr.ch3_dbg_upd_time:
	  vif.ch3_dbg_upd		<=1'b1;
	tr.ch3_dbg_fifo_e_time:
	  vif.ch3_dbg_fifo_e		<=1'b1;
	tr.ch3_dbg_fifo_f_time:
	  vif.ch3_dbg_fifo_f		<=1'b1;
	tr.ch3_ldst_addr_unalgn_time:
	  vif.ch3_ldst_addr_unalgn	<=1'b1;
	tr.ch3_dec_err_time:
	  vif.ch3_dec_err		<=1'b1;
	tr.ch3_exit_irq_time:
	  vif.ch3_exit_irq		<=1'b1;
    endcase

    case(cnt-1)
	tr.pll_lock_time:
	  vif.pll_lock 			<=1'b0;
	tr.pll_lost_lock_time:
	  vif.pll_lost_lock		<=1'b0;
	tr.ch0_dbg_upd_time:
	  vif.ch0_dbg_upd		<=1'b0;
	tr.ch0_dbg_fifo_e_time:
	  vif.ch0_dbg_fifo_e		<=1'b0;
	tr.ch0_dbg_fifo_f_time:
	  vif.ch0_dbg_fifo_f		<=1'b0;
	tr.ch0_ldst_addr_unalgn_time:
	  vif.ch0_ldst_addr_unalgn	<=1'b0;
	tr.ch0_dec_err_time:
	  vif.ch0_dec_err		<=1'b0;
	tr.ch0_exit_irq_time:
	  vif.ch0_exit_irq		<=1'b0;
	tr.ch1_dbg_upd_time:
	  vif.ch1_dbg_upd		<=1'b0;
	tr.ch1_dbg_fifo_e_time:
	  vif.ch1_dbg_fifo_e		<=1'b0;
	tr.ch1_dbg_fifo_f_time:
	  vif.ch1_dbg_fifo_f		<=1'b0;
	tr.ch1_ldst_addr_unalgn_time:
	  vif.ch1_ldst_addr_unalgn	<=1'b0;
	tr.ch1_dec_err_time:
	  vif.ch1_dec_err		<=1'b0;
	tr.ch1_exit_irq_time:
	  vif.ch1_exit_irq		<=1'b0;
	tr.ch2_dbg_upd_time:
	  vif.ch2_dbg_upd		<=1'b0;
	tr.ch2_dbg_fifo_e_time:
	  vif.ch2_dbg_fifo_e		<=1'b0;
	tr.ch2_dbg_fifo_f_time:
	  vif.ch2_dbg_fifo_f		<=1'b0;
	tr.ch2_ldst_addr_unalgn_time:
	  vif.ch2_ldst_addr_unalgn	<=1'b0;
	tr.ch2_dec_err_time:
	  vif.ch2_dec_err		<=1'b0;
	tr.ch2_exit_irq_time:
	  vif.ch2_exit_irq		<=1'b0;
	tr.ch3_dbg_upd_time:
	  vif.ch3_dbg_upd		<=1'b0;
	tr.ch3_dbg_fifo_e_time:
	  vif.ch3_dbg_fifo_e		<=1'b0;
	tr.ch3_dbg_fifo_f_time:
	  vif.ch3_dbg_fifo_f		<=1'b0;
	tr.ch3_ldst_addr_unalgn_time:
	  vif.ch3_ldst_addr_unalgn	<=1'b0;
	tr.ch3_dec_err_time:
	  vif.ch3_dec_err		<=1'b0;
	tr.ch3_exit_irq_time:
	  vif.ch3_exit_irq		<=1'b0;
    endcase
  end

endtask : make_intr