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[/] [qaz_libs/] [trunk/] [BFM/] [src/] [SPI/] [spi_driver.svh] - Blame information for rev 50

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1 47 qaztronic
//////////////////////////////////////////////////////////////////////
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////                                                              ////
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//// Copyright (C) 2018 Authors and OPENCORES.ORG                 ////
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////                                                              ////
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//// This source file may be used and distributed without         ////
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//// restriction provided that this copyright statement is not    ////
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//// removed from the file and that any derivative work contains  ////
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//// the original copyright notice and the associated disclaimer. ////
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////                                                              ////
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//// This source file is free software; you can redistribute it   ////
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//// and/or modify it under the terms of the GNU Lesser General   ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any   ////
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//// later version.                                               ////
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////                                                              ////
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//// This source is distributed in the hope that it will be       ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
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//// PURPOSE.  See the GNU Lesser General Public License for more ////
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//// details.                                                     ////
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////                                                              ////
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//// You should have received a copy of the GNU Lesser General    ////
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//// Public License along with this source; if not, download it   ////
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//// from http://www.opencores.org/lgpl.shtml                     ////
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////                                                              ////
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//////////////////////////////////////////////////////////////////////
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class spi_driver #(N)
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  extends uvm_driver #(spi_sequence_item);
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   `uvm_component_param_utils(spi_driver #(N))
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  // --------------------------------------------------------------------
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  virtual spi_if #(N) vif;
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  //--------------------------------------------------------------------
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  function void set_default;
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    vif.sclk <= 0;
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    vif.ss_n <= '1;
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    vif.mosi <= 'x;
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  endfunction: set_default
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  //--------------------------------------------------------------------
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  virtual task run_phase(uvm_phase phase);
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    spi_sequence_item item;
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    int index;
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    set_default();
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    forever
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    begin
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      index = 0;
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      seq_item_port.get_next_item(item);
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      vif.ss_n <= ~(1 << item.ss_index);
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      vif.mosi <= item.mosi_data[index];
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      #(vif.period / 2);
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      fork
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        repeat(item.data_width)
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        begin
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          #(vif.period / 2);
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          vif.sclk <= 1;
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          #(vif.period / 2);
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          vif.sclk <= 0;
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        end
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      join_none
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      repeat(item.data_width)
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      begin
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        @(vif.cb_rise);
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        item.miso_data[index] = vif.miso;
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        index++;
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        @(vif.cb_fall);
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        vif.mosi <= item.mosi_data[index];
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      end
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      #(vif.period / 2);
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      vif.ss_n <= '1;
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      set_default();
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      seq_item_port.item_done();
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    end
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  endtask : run_phase
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  //--------------------------------------------------------------------
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  function new(string name, uvm_component parent);
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    super.new(name, parent);
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  endfunction
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// --------------------------------------------------------------------
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endclass

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