1-to-8 demux

Makefile

@@ -1,6 +1,15 @@
 clean:
 	-rm *.vcd *.vvp
 
+dmux8way_tb: dmux8way_tb.vcd
+	gtkwave dmux8way_tb.vcd &
+
+dmux8way_tb.vcd: dmux8way_tb.vvp
+	vvp dmux8way_tb.vvp
+
+dmux8way_tb.vvp: dmux8way.v dmux8way_tb.v
+	iverilog -o dmux8way_tb.vvp dmux8way_tb.v
+
 dmux4way_tb: dmux4way_tb.vcd
 	gtkwave dmux4way_tb.vcd &
 

dmux8way.v

@@ -0,0 +1,15 @@
+`ifndef _dmux8way_v
+`define _dmux8way_v
+
+`include "dmux.v"
+`include "dmux4way.v"
+
+module DMux8Way (input in, input [2:0] sel, output a, output b, output c, output d, output e, output f, output g, output h);
+    wire temp0, temp1;
+
+    DMux u1 (.in(in), .sel(sel[2]), .a(temp0), .b(temp1));
+    DMux4Way u2 (.in(temp0), .sel(sel[1:0]), .a(a), .b(b), .c(c), .d(d));
+    DMux4Way u3 (.in(temp1), .sel(sel[1:0]), .a(e), .b(f), .c(g), .d(h));
+endmodule
+
+`endif

dmux8way_tb.v

@@ -0,0 +1,22 @@
+`include "dmux8way.v"
+
+module DMux8Way_test;
+    reg in=1;
+    reg [2:0] sel=0;
+    wire a, b, c, d;
+
+    integer i;
+
+    initial begin
+        $dumpfile("dmux8way_tb.vcd");
+        $dumpvars;
+        for (i=0; i<8; i=i+1)
+        begin
+            sel=i;
+            #1;
+        end
+        $finish();
+    end
+
+    DMux8Way u1(.in(in), .sel(sel), .a(a), .b(b), .c(c), .d(d), .e(e), .f(f), .g(g), .h(h));
+endmodule