Verilog学习笔记1：D触发器

代码1：

`timescale 1ns/10ps

module d_trigger(
				d,
				clk,
				q);

input d;
input clk;
output q;

assign q=~d;
				
endmodule

//testbench
module d_trigger_tb;
reg clk;
reg d;
wire q;

d_trigger d_trigger(
					.d(d),
					.clk(clk),
					.q(q)
					);

initial begin
				d<=0;clk<=0;
		#1000 	$stop;

end
always #10 begin clk<=~clk;d<=~d;end
endmodule

实验波形

代码二：

`timescale 1ns/10ps

module d_trigger(
				d,
				clk,
				q);

input d;
input clk;
output reg q;

always@(posedge clk) 
begin
	q<=d;
end
				
endmodule

module d_trigger_tb;
reg clk;
reg d;
wire q;

d_trigger d_trigger(
					.d(d),
					.clk(clk),
					.q(q)
					);

initial begin
				d<=0;clk<=0;
		#10 	clk<=1;d<=1;
		#10 	clk<=0;d<=1;
		#10 	clk<=1;d<=0;
		#10 	clk<=0;d<=1;
		#10 	clk<=1;d<=0;
		#10		$stop;

end
endmodule

 实验波形：

小结