1 files changed, 87 insertions, 0 deletions
diff --git a/USB_Host_Shield/Max_LCD.h b/USB_Host_Shield/Max_LCD.h
new file mode 100644
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--- /dev/null
+++ b/USB_Host_Shield/Max_LCD.h
@@ -0,0 +1,87 @@
+/* Copyright 2009-2011 Oleg Mazurov, Circuits At Home, http://www.circuitsathome.com */
+//HD44780 compatible LCD display via MAX3421E GPOUT support header
+//pinout: D[4-7] -> GPOUT[4-7], RS-> GPOUT[2], E ->GPOUT[3]
+//
+//this code is heavily borrowed from official Arduino source v.0017
+// link to original http://code.google.com/p/arduino/source/browse/trunk/hardware/libraries/LiquidCrystal/LiquidCrystal.h
+//
+#ifndef _Max_LCD_h_
+#define _Max_LCD_h_
+
+#include <inttypes.h>
+#include "Print.h"
+
+// commands
+#define LCD_CLEARDISPLAY 0x01
+#define LCD_RETURNHOME 0x02
+#define LCD_ENTRYMODESET 0x04
+#define LCD_DISPLAYCONTROL 0x08
+#define LCD_CURSORSHIFT 0x10
+#define LCD_FUNCTIONSET 0x20
+#define LCD_SETCGRAMADDR 0x40
+#define LCD_SETDDRAMADDR 0x80
+
+// flags for display entry mode
+#define LCD_ENTRYRIGHT 0x00
+#define LCD_ENTRYLEFT 0x02
+#define LCD_ENTRYSHIFTINCREMENT 0x01
+#define LCD_ENTRYSHIFTDECREMENT 0x00
+
+// flags for display on/off control
+#define LCD_DISPLAYON 0x04
+#define LCD_DISPLAYOFF 0x00
+#define LCD_CURSORON 0x02
+#define LCD_CURSOROFF 0x00
+#define LCD_BLINKON 0x01
+#define LCD_BLINKOFF 0x00
+
+// flags for display/cursor shift
+#define LCD_DISPLAYMOVE 0x08
+#define LCD_CURSORMOVE 0x00
+#define LCD_MOVERIGHT 0x04
+#define LCD_MOVELEFT 0x00
+
+// flags for function set
+#define LCD_8BITMODE 0x10
+#define LCD_4BITMODE 0x00
+#define LCD_2LINE 0x08
+#define LCD_1LINE 0x00
+#define LCD_5x10DOTS 0x04
+#define LCD_5x8DOTS 0x00
+
+class Max_LCD : public Print {
+public:
+  Max_LCD();
+  void init();
+  void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);
+  void clear();
+  void home();
+  void noDisplay();
+  void display();
+  void noBlink();
+  void blink();
+  void noCursor();
+  void cursor();
+  void scrollDisplayLeft();
+  void scrollDisplayRight();
+  void leftToRight();
+  void rightToLeft();
+  void autoscroll();
+  void noAutoscroll();
+  void createChar(uint8_t, uint8_t[]);
+  void setCursor(uint8_t, uint8_t); 
+  virtual void write(uint8_t);
+  void command(uint8_t);
+private:
+  void sendbyte( uint8_t val );
+  uint8_t _displayfunction; //tokill
+  uint8_t _displaycontrol;
+  uint8_t _displaymode;
+  uint8_t _initialized;
+  uint8_t _numlines,_currline;
+};
+
+
+
+
+#endif
+\ No newline at end of file