Merge pull request #3203 from YosysHQ/micko/sim_ff

Simulation for various FF types

1 files changed, 50 insertions, 0 deletions

diff --git a/tests/sim/tb/tb_dlatch.v b/tests/sim/tb/tb_dlatch.v
new file mode 100755
index 000000000..aea6cb0a3
--- /dev/null
+++ b/tests/sim/tb/tb_dlatch.v
@@ -0,0 +1,50 @@
+`timescale 1ns/1ns 
+module tb_dlatch();
+	reg clk = 0;
+	reg en = 0;
+	reg d = 0;
+	wire q;
+
+	dlatch uut(.d(d),.en(en),.q(q));
+
+	always
+		#(5) clk <= !clk;
+
+	initial
+	begin
+		$dumpfile("tb_dlatch");
+		$dumpvars(0,tb_dlatch);
+		#10
+		d = 1;
+		#10
+		d = 0;
+		#10
+		d = 1;
+		#10
+		d = 0;
+		#10
+		d = 1;
+		#10
+		d = 0;
+		#10
+		en = 1;
+		#10
+		d = 1;
+		#10
+		d = 0;
+		#10
+		d = 1;
+		#10
+		d = 0;
+		#10
+		d = 1;
+		#10
+		d = 0;
+		#10
+		d = 1;
+		#10
+		d = 0;
+		#10
+		$finish;
+	end
+endmodule