没人愿意说说吗？为什么触发的不是同一个事物呢？

lkk1988223 · 发表于 2013-10-31 11:03:56

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本帖最后由 lkk1988223 于 2013-10-31 15:43 编辑

直接附代码：
virtual task body();
  automatic ahb_transfer a ;
begin
   for(int i = 0; i <= itr; i++) begin
      req = ahb_transfer::type_id::create("req");
      start_item(req);
      assert(req.randomize());
      a = req ;
      fork
      begin
         a.wait_trigger("DATA_DONE") ;
         if(a.direction==READ) `uvm_info(get_type_name(),$psprintf("master sequence read data :\n%s",a.sprint()), UVM_LOW)
      end
      join_none
      finish_item(req);
   end
end
  endtask

  task  automatic  do_pipeline_transfer ;
   ahb_transfer  transfer ;
   forever begin
      key.get();             //the key is a semaphore
      seq_item_port.get( transfer );
      `uvm_info(get_type_name(),$psprintf("Driving request :\n%s",transfer.sprint()), UVM_LOW)
      accept_tr(transfer,$time);
      void'(begin_tr(transfer,"pipelined_driver"));
      // driver control
      ...
      @(posedge vif.HCLK)
      key.put();
      //driver data
      ...
      @(posedge vif.HCLK iff vif. AHB_HREADY)
      if(transfer.direction == READ)
         begin
      transfer.rdata = vif.AHB_HRDATA;
      `uvm_info(get_type_name(),$psprintf("master read data :\n%s",transfer.sprint()), UVM_LOW)
      transfer.trigger("DATA_DONE");
      end
      end_tr(transfer);
   end
  endtask
output :
# UVM_INFO ahb_master_driver.sv(73) @ 75: uvm_test_top.ahb0.master_agent.driver [ahb_master_driver] master read data :
# ----------------------------------------------------------------------------------------------------------------------
# Name                         Type             Size  Value
# ----------------------------------------------------------------------------------------------------------------------
# req                         ahb_transfer    -    @963
# wdata                      integral          32 'h91fb2fc4
# rdata                      integral          32 'h6afb75c6
# address                   integral          32 'h17ce26
# direction                   ahb_direction    1    READ

# ----------------------------------------------------------------------------------------------------------------------
#
# UVM_INFO ahb_master_seq_lib.sv(84) @ 75: uvm_test_top.ahb0.master_agent.sequencer@@ahb_master_single_seq [ahb_master_single_seq] master sequence read data :
# ----------------------------------------------------------------------------------------------------------------------
# Name                         Type             Size  Value
# ----------------------------------------------------------------------------------------------------------------------
# req                         ahb_transfer    -    @1020
# wdata                      integral          32 'hd1fb2950
# rdata                      integral          32 'h82332ddc
# address                   integral          32 'h136da6
# direction                   ahb_direction    1    READ
求助：我是想让sequence输出从总线上收集的信息，为什么我执行transfer.trigger("DATA_DONE")时是@963  而sequence被触发的时候换成 @1020 了。注意：这里任务 do_pipeline_transfer 是2个并发执行的。谢谢指点~  速度来人啊！解答困惑啊！