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[/] [qaz_libs/] [trunk/] [BFM/] [src/] [SPI/] [spi_driver.svh] - Rev 48
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//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2018 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
class spi_driver
extends uvm_driver #(spi_sequence_item);
`uvm_component_utils(spi_driver)
// --------------------------------------------------------------------
virtual spi_if vif;
//--------------------------------------------------------------------
function void set_default;
vif.sclk <= 0;
vif.ss_n <= 1;
vif.mosi <= 'x;
endfunction: set_default
//--------------------------------------------------------------------
virtual task run_phase(uvm_phase phase);
spi_sequence_item item;
int index;
set_default();
forever
begin
index = 0;
seq_item_port.get_next_item(item);
vif.ss_n <= 0;
vif.mosi <= item.mosi_data[index];
#(vif.period / 2);
fork
repeat(item.data_width)
begin
#(vif.period / 2);
vif.sclk <= 1;
#(vif.period / 2);
vif.sclk <= 0;
end
join_none
repeat(item.data_width)
begin
@(vif.cb_rise);
item.miso_data[index] = vif.miso;
index++;
@(vif.cb_fall);
vif.mosi <= item.mosi_data[index];
end
#(vif.period / 2);
vif.ss_n <= 1;
set_default();
seq_item_port.item_done();
end
endtask : run_phase
//--------------------------------------------------------------------
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
// --------------------------------------------------------------------
endclass : spi_driver
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