在Verilog设计中产生时钟故障 [英] Producing a clock glitch in a Verilog design
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问题描述
我正在使用Verilog设计芯片。我有一个3位计数器。我希望当计数器处于第8个循环时,应该出现时钟故障,然后才能正常工作。在Verilog设计中产生时钟毛刺的可能方法是什么?
I am designing a chip using Verilog. I have a 3-bit counter. I want that when the counter is in its 8th loop, there should be a clock glitch, and thereafter work normally. What could be the possible ways of producing a clock glitch in a Verilog design?
推荐答案
在时钟信号上注入毛刺的一种方法是使用测试台上的 force
和 release
:
One way to inject glitches on a clock signal is to use force
and release
from your testbench:
module tb;
reg clk;
reg [2:0] cnt;
reg reset;
always begin
#5 clk <= 0;
#5 clk <= 1;
end
always @(posedge clk or posedge reset) begin
if (reset) begin
cnt <= 0;
end else begin
cnt <= cnt + 1;
end
end
always begin: inject_clk_glitch
wait(cnt == 7);
#1 force clk = 1;
#1 force clk = 0;
#1 release clk;
end
initial begin
reset = 1;
#20 reset = 0;
#500 $finish;
end
endmodule
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