From ee7d172e6e8009695a68bb04c9da72e70514078e Mon Sep 17 00:00:00 2001
From: Theuno <theuno@gmail.com>
Date: Wed, 27 Aug 2014 18:24:02 +0000
Subject: [PATCH] Add _Contrast variable to BitWizardLcd, to be able to use the
 variable (as with _Backlight) Minor improvement

---
 src/BitWizard/bw.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/BitWizard/bw.py b/src/BitWizard/bw.py
index 397c7ac..fa9b27d 100644
--- a/src/BitWizard/bw.py
+++ b/src/BitWizard/bw.py
@@ -619,6 +619,7 @@ class BitWizardLcd(BitWizardBase):
     DefaultAddress = 0x82
     Cursor = "Off" #Blink, On
     _Backlight = 128
+    _Contrast = 128
         
     def SetCursor(self,x,y):
         """
@@ -651,7 +652,8 @@ def Contrast(self, value=128):
         """
         @brief Change LCD contrast, defaults to 128
         """
-        self.Bus.Write_uInt8(self.Address,Contrast,value)
+        if value > 0 : self._Contrast = value
+        self.Bus.Write_uInt8(self.Address,Contrast,self._Contrast)
 
     # Set the BackLight of the LCD
     def Backlight(self, value = 128):