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Transition bins creation : Range of repetition
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Sometime it is required to cover atleat one of the these repetition of values in transition bins are hit. We can manually specify them, but then Systemverilog provides the synax to write this. |
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WRITE=>WRITE or |
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WRITE=>WRITE=>WRITE or |
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WRITE=>WRITE=>WRITE=>WRITE or |
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WRITE=>WRITE=>WRITE=>WRITE=>WRITE |
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Example : Range of repetition creation
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1 module test();
2
3 logic [2:0] addr;
4 reg ce;
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6 covergroup address_cov () @ (posedge ce);
7 ADDRESS : coverpoint addr {
8 bins adr0[] = (0[*1:4]);
9 bins adr1[] = (1[*1:2]);
10 }
11 endgroup
12
13 address_cov my_cov = new();
14
15 initial begin
16 ce <= 0;
17 $monitor("ce %b addr 8'h%x",ce,addr);
18 repeat (10) begin
19 ce <= 1;
20 addr <= $urandom_range(0,1);
21 #10 ;
22 ce <= 0;
23 #10 ;
24 end
25 end
26
27 endmodule
You could download file range_repetition_bin.sv here
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Simulation : Range of repetition creation
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ce 1 addr 8'h0
ce 0 addr 8'h0
ce 1 addr 8'h0
ce 0 addr 8'h0
ce 1 addr 8'h1
ce 0 addr 8'h1
ce 1 addr 8'h0
ce 0 addr 8'h0
ce 1 addr 8'h1
ce 0 addr 8'h1
ce 1 addr 8'h1
ce 0 addr 8'h1
ce 1 addr 8'h0
ce 0 addr 8'h0
ce 1 addr 8'h1
ce 0 addr 8'h1
ce 1 addr 8'h0
ce 0 addr 8'h0
ce 1 addr 8'h1
ce 0 addr 8'h1
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Report : Range of repetition creation
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=====================================================================
Group : test::address_cov
=====================================================================
SCORE WEIGHT GOAL
100.00 1 100
---------------------------------------------------------------------
Summary for Group test::address_cov
CATEGORY EXPECTED UNCOVERED COVERED PERCENT
Variables 2 0 2 100.00
Variables for Group test::address_cov
VARIABLE EXPECTED UNCOVERED COVERED PERCENT GOAL WEIGHT
ADDRESS 2 0 2 100.00 100 1
---------------------------------------------------------------------
Summary for Variable ADDRESS
CATEGORY EXPECTED UNCOVERED COVERED PERCENT
User Defined Bins 2 0 2 100.00
User Defined Bins for ADDRESS
Bins
NAME COUNT AT LEAST
adr1:1[*[1:2]] 5 1
adr0:0[*[1:4]] 5 1
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Copyright © 1998-2014 |
Deepak Kumar Tala - All rights reserved |
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Do you have any Comment? mail me at:deepak@asic-world.com
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