README

README.md

@@ -190,7 +190,7 @@ Run the script.
 python hello_led.py
 ```
 
-You will have a complete Verilog HDL source code named 'tmp.v' in the root directory, which is generated by the source code generator.
+You will have a complete Verilog HDL source code named 'tmp.v' as below, which is generated by the source code generator.
 
 ```verilog
 module test #
@@ -293,6 +293,39 @@ module blinkled #
 endmodule
 ```
 
+You will also see the simulation result of the generated Verilog code on Icarus Verilog.
+
+```
+VCD info: dumpfile uut.vcd opened for output.
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  x count:         x
+LED:  0 count:         0
+LED:  0 count:         1
+LED:  0 count:         2
+LED:  0 count:         3
+LED:  0 count:         4
+...
+LED:  9 count:       777
+LED:  9 count:       778
+LED:  9 count:       779
+LED:  9 count:       780
+LED:  9 count:       781
+LED:  9 count:       782
+LED:  9 count:       783
+```
+
+If you installed GTKwave and enable 'sim.view_waveform()' in 'hello_led.py', you can see the waveform the simulation result.
+
+![waveform.png](img/waveform.png)
+
 
 Publication
 ==============================

README.rst

@@ -207,8 +207,8 @@ Run the script.
 
     python hello_led.py
 
-You will have a complete Verilog HDL source code named 'tmp.v' in the
-root directory, which is generated by the source code generator.
+You will have a complete Verilog HDL source code named 'tmp.v' as below,
+which is generated by the source code generator.
 
 .. code:: verilog
 
@@ -311,6 +311,44 @@ root directory, which is generated by the source code generator.
 
     endmodule
 
+You will also see the simulation result of the generated Verilog code on
+Icarus Verilog.
+
+::
+
+    VCD info: dumpfile uut.vcd opened for output.
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  x count:         x
+    LED:  0 count:         0
+    LED:  0 count:         1
+    LED:  0 count:         2
+    LED:  0 count:         3
+    LED:  0 count:         4
+    ...
+    LED:  9 count:       777
+    LED:  9 count:       778
+    LED:  9 count:       779
+    LED:  9 count:       780
+    LED:  9 count:       781
+    LED:  9 count:       782
+    LED:  9 count:       783
+
+If you installed GTKwave and enable 'sim.view\_waveform()' in
+'hello\_led.py', you can see the waveform the simulation result.
+
+.. figure:: img/waveform.png
+   :alt: waveform.png
+
+   waveform.png
+
 Publication
 ===========