APB_VIP/apb_slv_driver.sv at main · Mujtabadar537/APB_VIP · GitHub

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class apb_slv_driver extends uvm_driver#(apb_item);
  //======================
  // Factory registeration
  //======================
  `uvm_component_utils(apb_slv_driver)

  //======================
  // Constructor
  //======================
  function new(string name = "apb_slv_driver" , uvm_component parent=null);
    super.new(name , parent);
  endfunction

   //=============================
  // Handle to virtual interface
  //=============================
  virtual apb_interface apb_vif;

  //=============================
  // Handle to apb configuration
  //=============================
  apb_config apb_cfg;

  //=============================
  // Handle to apb sequence item
  //=============================
  apb_item pkt;
  apb_item apb_rsp_item;

  //======================
  // Build phase
  //======================
  function void build_phase(uvm_phase phase);
    super.build_phase(phase);
    `uvm_info(get_type_name(), "__________Starting build phase__________", UVM_MEDIUM);
    pkt = apb_item::type_id::create("pkt"); // creating apb_item
    apb_rsp_item = apb_item::type_id::create("apb_rsp_item"); // creating apb response item

    if(!(uvm_config_db#(virtual apb_interface)::get(this, "", "apb_vif", apb_vif))) begin
      `uvm_error(get_type_name(), "Failed to get virtual interface");
    end
    else begin
      `uvm_info(get_type_name(), "Virtual interface recieved successfully", UVM_HIGH);
    end

    if(!uvm_config_db#(apb_config)::get(null , "" , "apb_cfg" , apb_cfg)) begin
      `uvm_fatal(get_type_name() , "Failed to recieve apb configuration")
    end
    else begin
      `uvm_info(get_type_name() , "apb configuration successfully received" , UVM_HIGH);
    end
    `uvm_info(get_type_name(), "__________Ending build phase__________", UVM_MEDIUM);
  endfunction

  //======================
  // Main phase
  //======================
  task main_phase(uvm_phase phase);
    super.main_phase(phase);
    `uvm_info(get_type_name(), "__________Starting main phase of apb_slave_driver__________", UVM_MEDIUM);
    repeat(apb_cfg.packets) begin
      seq_item_port.get_next_item(pkt);
      apb_response_tx(pkt , apb_rsp_item);// driving apb resposne

      pkt.print_apb_slv("APB_PACKET" , UVM_HIGH);

      seq_item_port.item_done(apb_rsp_item);
    end
    `uvm_info(get_type_name(), "__________Ending main phase of apb_slave_driver__________", UVM_MEDIUM);
  endtask

  task apb_response_tx(apb_item pkt , apb_item rsp);
    apb_item apb_rsp;
    if(!$cast(apb_rsp , pkt.clone())) begin
      `uvm_error(get_type_name() , "Failed to cast apb_rsp")
    end
    apb_rsp.set_id_info(pkt);
    @(posedge apb_vif.clk iff apb_vif.resetn);
    apb_vif.PREADY <= pkt.PREADY;
    apb_vif.PSLVERR <= pkt.PSLVERR;
    apb_vif.PRDATA <= pkt.PRDATA;

    @(posedge apb_vif.clk);
    apb_rsp.PADDR <= apb_vif.PADDR;
  	apb_rsp.PSELx <= apb_vif.PSELx;
  	apb_rsp.PENABLE <= apb_vif.PENABLE;
  	apb_rsp.PWRITE <= apb_vif.PWRITE;
  	apb_rsp.PWDATA <= apb_vif.PWDATA;
  	apb_rsp.PSTRB <= apb_vif.PSTRB;

    rsp = apb_rsp;
  endtask
endclass