add help message for spec

diff --git a/src/pinmux_generator.py b/src/pinmux_generator.py
index 8d36f1c113a4ebb80d69b68cb11f0d6596d2ec50..b38ffcb5555e9d40a518bdc74c4a1d2cf8a3cf26 100644 (file)
--- a/src/pinmux_generator.py
+++ b/src/pinmux_generator.py
@@ -26,7 +26,8 @@ from bsv.pinmux_generator import pinmuxgen as bsvgen
 
 def printhelp():
     print ('''pinmux_generator.py [-o outputdir] [-v|--validate] [-h|--help]
-                                  [-t outputtype]
+                                  [-t outputtype] [-s|--spec spec]
+    -s | spec       : generate from spec (python module)
     -t | outputtype : outputtype, defaults to bsv
     -o outputdir    : defaults to bsv_src.  also location for reading pinmux.txt
                       interfaces.txt and *.txt