From 03a6b2c54a2547e9012376a3c2e1d8cb090b081b Mon Sep 17 00:00:00 2001
From: Mark Sproul <msproul@skychariot.com>
Date: Sun, 4 Dec 2011 16:54:32 -0500
Subject: [PATCH] Added setRowOffsets to LiquidCrystal library

Original commit by Mark Sproul, but cleaned up by Matthijs Kooijman.
---
 libraries/LiquidCrystal/src/LiquidCrystal.cpp | 15 ++++++++++++---
 libraries/LiquidCrystal/src/LiquidCrystal.h   |  2 ++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/libraries/LiquidCrystal/src/LiquidCrystal.cpp b/libraries/LiquidCrystal/src/LiquidCrystal.cpp
index 0653487d7..5dbb830f9 100644
--- a/libraries/LiquidCrystal/src/LiquidCrystal.cpp
+++ b/libraries/LiquidCrystal/src/LiquidCrystal.cpp
@@ -79,6 +79,8 @@ void LiquidCrystal::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t en
   else 
     _displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
   
+  setRowOffsets(0x00, 0x40, 0x14, 0x54);  
+  
   begin(16, 1);  
 }
 
@@ -157,6 +159,14 @@ void LiquidCrystal::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
 
 }
 
+void LiquidCrystal::setRowOffsets(int row0, int row1, int row2, int row3)
+{
+	_row_offsets[0] = row0;
+	_row_offsets[1] = row1;
+	_row_offsets[2] = row2;
+	_row_offsets[3] = row3;
+}
+
 /********** high level commands, for the user! */
 void LiquidCrystal::clear()
 {
@@ -172,12 +182,11 @@ void LiquidCrystal::home()
 
 void LiquidCrystal::setCursor(uint8_t col, uint8_t row)
 {
-  int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
   if ( row >= _numlines ) {
-    row = _numlines-1;    // we count rows starting w/0
+    row = _numlines - 1;    // we count rows starting w/0
   }
   
-  command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
+  command(LCD_SETDDRAMADDR | (col + _row_offsets[row]));
 }
 
 // Turn the display on/off (quickly)
diff --git a/libraries/LiquidCrystal/src/LiquidCrystal.h b/libraries/LiquidCrystal/src/LiquidCrystal.h
index 24ec5afdf..1c0fa4fb0 100644
--- a/libraries/LiquidCrystal/src/LiquidCrystal.h
+++ b/libraries/LiquidCrystal/src/LiquidCrystal.h
@@ -77,6 +77,7 @@ public:
   void autoscroll();
   void noAutoscroll();
 
+  void setRowOffsets(int row1, int row2, int row3, int row4);
   void createChar(uint8_t, uint8_t[]);
   void setCursor(uint8_t, uint8_t); 
   virtual size_t write(uint8_t);
@@ -101,6 +102,7 @@ private:
   uint8_t _initialized;
 
   uint8_t _numlines,_currline;
+  int _row_offsets[4];
 };
 
 #endif