uvm通信-analysis_port使用示例(完整uvm测试平台)
资料来源
(1) 《The UVM Primer》第15章
1.top.sv
1 module top; 2 import uvm_pkg::*; 3 `include "uvm_macros.svh" 4 import dice_pkg::*; 5 initial run_test("dice_test"); 6 endmodule : top
2.dice_pkg.sv
package dice_pkg; import uvm_pkg::*; `include "uvm_macros.svh" `include "coverage.svh" `include "histogram.svh" `include "average.svh" `include "dice_roller.svh" `include "dice_test.svh" endpackage : dice_pkg
3.dice_test.svh
class dice_test extends uvm_test; `uvm_component_utils(dice_test); dice_roller dice_roller_h; coverage coverage_h; histogram histogram_h; average average_h; function void connect_phase(uvm_phase phase); dice_roller_h.roll_ap.connect(coverage_h.analysis_export); dice_roller_h.roll_ap.connect(histogram_h.analysis_export); dice_roller_h.roll_ap.connect(average_h.analysis_export); endfunction : connect_phase function new(string name, uvm_component parent); super.new(name,parent); endfunction : new function void build_phase(uvm_phase phase); dice_roller_h = new("dice_roller_h", this); coverage_h = new("coverage_h", this); histogram_h = new("histogram_h",this); average_h = new("average_h",this); endfunction : build_phase endclass : dice_test
4.dice_roller.svh
1 class dice_roller extends uvm_component; 2 `uvm_component_utils(dice_roller); 3 4 uvm_analysis_port #(int) roll_ap; 5 6 function void build_phase (uvm_phase phase); 7 8 roll_ap = new("roll_ap",this); 9 10 endfunction : build_phase 11 12 rand byte die1; 13 rand byte die2; 14 15 constraint d6 { die1 >= 1; die1 <= 6; 16 die2 >= 1; die2 <= 6; } 17 18 19 task run_phase(uvm_phase phase); 20 int the_roll; 21 phase.raise_objection(this); 22 void'(randomize()); 23 repeat (20) begin 24 void'(randomize()); 25 the_roll = die1 + die2; 26 roll_ap.write(the_roll); 27 end 28 phase.drop_objection(this); 29 endtask : run_phase 30 31 32 33 function new(string name, uvm_component parent); 34 super.new(name,parent); 35 endfunction : new 36 37 endclass : dice_roller
5.coverage.svh
1 class coverage extends uvm_subscriber#(int); 2 `uvm_component_utils(coverage); 3 int the_roll; 4 5 covergroup dice_cg; 6 coverpoint the_roll{ 7 bins twod6[] = {2,3,4,5,6,7,8,9,10,11,12};} 8 endgroup 9 10 11 function new(string name, uvm_component parent = null); 12 super.new(name,parent); 13 dice_cg = new(); 14 endfunction : new 15 16 17 function void write (int t); 18 the_roll = t; 19 dice_cg.sample(); 20 endfunction : write 21 22 function void report_phase(uvm_phase phase); 23 24 $display("\nCOVERAGE: %2.0f%% ", dice_cg.get_coverage()); 25 endfunction : report_phase 26 endclass : coverage
6.histogram.svh
1 class histogram extends uvm_subscriber #(int); 2 `uvm_component_utils(histogram); 3 4 int rolls[int]; 5 6 7 function new(string name, uvm_component parent); 8 super.new(name,parent); 9 for (int ii = 2; ii <= 12; ii++) rolls[ii] = 0; 10 endfunction : new 11 12 function void write(int t); 13 rolls[t]++; 14 endfunction : write 15 16 17 function void report_phase(uvm_phase phase); 18 string bar; 19 string message; 20 21 message = "\n"; 22 foreach (rolls[ii]) begin 23 string roll_msg; 24 bar = ""; 25 repeat (rolls[ii]) bar = {bar,"#"}; 26 roll_msg = $sformatf( "%2d: %s\n", ii, bar); 27 message = {message,roll_msg}; 28 end 29 $display(message); 30 endfunction : report_phase 31 endclass : histogram
7.average.svh
1 class average extends uvm_subscriber #(int); 2 `uvm_component_utils(average); 3 4 real dice_total; 5 real count; 6 7 function new(string name, uvm_component parent = null); 8 super.new(name,parent); 9 dice_total = 0.0; 10 count = 0.0; 11 endfunction : new 12 13 function void write(int t); 14 dice_total = dice_total + t; 15 count++; 16 endfunction : write 17 18 function void report_phase(uvm_phase phase); 19 20 $display ("DICE AVERAGE: %2.1f",dice_total/count); 21 endfunction : report_phase 22 23 endclass : average
