From 90287bca738db55966cbcf1b13a693d05643551f Mon Sep 17 00:00:00 2001
From: Erick <ahmederick00@gmail.com>
Date: Mon, 28 Feb 2022 23:55:42 +0100
Subject: [PATCH] adding testbenches

---
 gates/testbench/mux.v     | 32 ++++++++++++++++++++++++++++++++
 gates/testbench/nand_tb.v | 17 +++++++++++++++++
 gates/testbench/not_tb.v  | 15 +++++++++++++++
 gates/testbench/or_tb.v   | 18 ++++++++++++++++++
 4 files changed, 82 insertions(+)
 create mode 100644 gates/testbench/mux.v
 create mode 100644 gates/testbench/nand_tb.v
 create mode 100644 gates/testbench/not_tb.v
 create mode 100644 gates/testbench/or_tb.v

diff --git a/gates/testbench/mux.v b/gates/testbench/mux.v
new file mode 100644
index 0000000..010821c
--- /dev/null
+++ b/gates/testbench/mux.v
@@ -0,0 +1,32 @@
+include "mux.v"
+
+module mux_tb();
+    reg a,b, sel;
+    output y;
+    mux dut(a, b, sel, y);
+        initial begin
+            a = 0; b = 0; sel = 0;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+            #5;
+            a = 1; b = 0; sel = 0;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+            #5;
+            a = 0; b = 1; sel = 0;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+            #5;
+            a = 1; b = 1; sel = 0;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+            #5;
+            a = 0; b = 0; sel = 1;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+            #5;
+            a = 1; b = 0; sel = 1;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+            #5;
+            a = 0; b = 1; sel = 1;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+            #5;
+            a = 1; b = 1; sel = 1;
+            $monitor("IN: %b, %b ",a, b, "SEL: ",sel, " OUT: ",y);
+        end
+endmodule
\ No newline at end of file
diff --git a/gates/testbench/nand_tb.v b/gates/testbench/nand_tb.v
new file mode 100644
index 0000000..217aede
--- /dev/null
+++ b/gates/testbench/nand_tb.v
@@ -0,0 +1,17 @@
+include "nand_gate.v"
+
+module nand_tb();
+    reg ta,tb;
+    wire ty;
+    nand_gate dut(y, ta, tb);
+        initial begin
+            ta = 0; tb = 0;
+            $monitor("IN: %b, %b ",ta, tb, "OUT: ",y);
+        #5  ta = 1; tb = 0;
+            $monitor("IN: %b, %b ",ta, tb, "OUT: ",y);
+        #5  ta = 0; tb = 1;
+            $monitor("IN: %b, %b ",ta, tb, "OUT: ",y);
+        #5  ta = 1; tb = 1;
+            $monitor("IN: %b, %b ",ta, tb, "OUT: ",y);
+        end
+endmodule
\ No newline at end of file
diff --git a/gates/testbench/not_tb.v b/gates/testbench/not_tb.v
new file mode 100644
index 0000000..c4b0daa
--- /dev/null
+++ b/gates/testbench/not_tb.v
@@ -0,0 +1,15 @@
+include "not_gate.v"
+
+module not_tb();
+    reg ta;
+    wire ty;
+
+    not_gate dut(y, ta);
+
+    initial begin
+        ta=0;
+        $monitor("IN: %b", ta, "OUT: ", y)
+        ta=1;
+        $monitor("IN: %b", ta, "OUT: ", y)
+    end
+endmodule
\ No newline at end of file
diff --git a/gates/testbench/or_tb.v b/gates/testbench/or_tb.v
new file mode 100644
index 0000000..d0d89a2
--- /dev/null
+++ b/gates/testbench/or_tb.v
@@ -0,0 +1,18 @@
+include "or_gate.v"
+
+module or_tb();
+    reg ta, tb;
+    wire ty;
+
+    or_gate dut(y, ta, tb);
+
+    initial begin
+        ta=0, tb=0;
+        $monitor("IN: %b, %b ",ta, tb, "OUT: ",y);
+        ta=0, tb=1;
+        $monitor("IN: %b, %b ",ta, tb, "OUT: ",y);
+        ta=1, tb=0;
+        $monitor("IN: %b, %b ",ta, tb, "OUT: ",y);
+        ta=1, tb=1;
+    end
+endmodule
\ No newline at end of file