From eda95d8beda548f5eaffe902ff972b9f1baa5007 Mon Sep 17 00:00:00 2001
From: CoderSquirrel <CoderSquirrel@users.noreply.github.com>
Date: Sat, 19 Mar 2016 18:25:51 -0400
Subject: [PATCH] Add support for LCM1602 16x2 I2C LCD adapter

---
 .travis.yml                                      | 5 +++++
 Marlin/Configuration.h                           | 2 ++
 Marlin/Marlin.ino                                | 4 ++++
 Marlin/ultralcd_implementation_hitachi_HD44780.h | 6 ++++++
 4 files changed, 17 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 8e20db2a4..babda87b9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -150,6 +150,11 @@ script:
   - sed -i 's/\/\/#define LCD_I2C_VIKI/#define LCD_I2C_VIKI/g' Marlin/Configuration.h
   - rm -rf .build/
   - DISPLAY=:1.0 ~/bin/arduino --verify --board marlin:avr:mega  Marlin/Marlin.ino
+  # LCM1602
+  - cp Marlin/Configuration.h.backup Marlin/Configuration.h
+  - sed -i 's/\/\/#define LCM1602/#define LCM1602/g' Marlin/Configuration.h
+  - rm -rf .build/
+  - DISPLAY=:1.0 ~/bin/arduino --verify --board marlin:avr:mega  Marlin/Marlin.ino
   # Enable filament sensor
   - cp Marlin/Configuration.h.backup Marlin/Configuration.h
   - sed -i 's/\/\/#define FILAMENT_SENSOR/#define FILAMENT_SENSOR/g' Marlin/Configuration.h
diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index bb8b8ba26..06d45ffed 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -754,6 +754,8 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
 
 //#define LCD_I2C_SAINSMART_YWROBOT
 
+//#define LCM1602 // LCM1602 Adapter for 16x2 LCD
+
 // PANELOLU2 LCD with status LEDs, separate encoder and click inputs
 //
 // This uses the LiquidTWI2 library v1.2.3 or later ( https://github.com/lincomatic/LiquidTWI2 )
diff --git a/Marlin/Marlin.ino b/Marlin/Marlin.ino
index 09e73dcc1..7450ee1fd 100644
--- a/Marlin/Marlin.ino
+++ b/Marlin/Marlin.ino
@@ -40,6 +40,10 @@
   #elif ENABLED(LCD_I2C_TYPE_MCP23017) || ENABLED(LCD_I2C_TYPE_MCP23008)
     #include <Wire.h>
     #include <LiquidTWI2.h>
+  #elif ENABLED(LCM1602)
+    #include <Wire.h>
+    #include <LCD.h>
+    #include <LiquidCrystal_I2C.h>
   #elif ENABLED(DOGLCD)
     #include <U8glib.h> // library for graphics LCD by Oli Kraus (https://code.google.com/p/u8glib/)
   #else
diff --git a/Marlin/ultralcd_implementation_hitachi_HD44780.h b/Marlin/ultralcd_implementation_hitachi_HD44780.h
index e12ec2d8f..8a033afbe 100644
--- a/Marlin/ultralcd_implementation_hitachi_HD44780.h
+++ b/Marlin/ultralcd_implementation_hitachi_HD44780.h
@@ -183,6 +183,12 @@ extern volatile uint8_t buttons;  //an extended version of the last checked butt
   #include <LiquidCrystal_SR.h>
   #define LCD_CLASS LiquidCrystal_SR
   LCD_CLASS lcd(SR_DATA_PIN, SR_CLK_PIN);
+#elif ENABLED(LCM1602)
+  #include <Wire.h>
+  #include <LCD.h>
+  #include <LiquidCrystal_I2C.h>
+  #define LCD_CLASS LiquidCrystal_I2C
+  LCD_CLASS lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
 #else
   // Standard directly connected LCD implementations
   #include <LiquidCrystal.h>