protocol/usb_hid/USB_Host_Shield_2.0/max_LCD.h

   1 /* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
   2
   3 This software may be distributed and modified under the terms of the GNU
   4 General Public License version 2 (GPL2) as published by the Free Software
   5 Foundation and appearing in the file GPL2.TXT included in the packaging of
   6 this file. Please note that GPL2 Section 2[b] requires that all works based
   7 on this software must also be made publicly available under the terms of
   8 the GPL2 ("Copyleft").
   9
  10 Contact information
  11 -------------------
  12
  13 Circuits At Home, LTD
  14 Web      :  http://www.circuitsathome.com
  15 e-mail   :  support@circuitsathome.com
  16  */
  17 //HD44780 compatible LCD display via MAX3421E GPOUT support header
  18 //pinout: D[4-7] -> GPOUT[4-7], RS-> GPOUT[2], E ->GPOUT[3]
  19 //
  20
  21 #ifndef _Max_LCD_h_
  22 #define _Max_LCD_h_
  23
  24 #include "Usb.h"
  25 #include "Print.h"
  26
  27 // commands
  28 #define LCD_CLEARDISPLAY        0x01
  29 #define LCD_RETURNHOME          0x02
  30 #define LCD_ENTRYMODESET        0x04
  31 #define LCD_DISPLAYCONTROL      0x08
  32 #define LCD_CURSORSHIFT         0x10
  33 #define LCD_FUNCTIONSET         0x20
  34 #define LCD_SETCGRAMADDR        0x40
  35 #define LCD_SETDDRAMADDR        0x80
  36
  37 // flags for display entry mode
  38 #define LCD_ENTRYRIGHT          0x00
  39 #define LCD_ENTRYLEFT           0x02
  40 #define LCD_ENTRYSHIFTINCREMENT 0x01
  41 #define LCD_ENTRYSHIFTDECREMENT 0x00
  42
  43 // flags for display on/off control
  44 #define LCD_DISPLAYON           0x04
  45 #define LCD_DISPLAYOFF          0x00
  46 #define LCD_CURSORON            0x02
  47 #define LCD_CURSOROFF           0x00
  48 #define LCD_BLINKON             0x01
  49 #define LCD_BLINKOFF            0x00
  50
  51 // flags for display/cursor shift
  52 #define LCD_DISPLAYMOVE         0x08
  53 #define LCD_CURSORMOVE          0x00
  54 #define LCD_MOVERIGHT           0x04
  55 #define LCD_MOVELEFT            0x00
  56
  57 // flags for function set
  58 #define LCD_8BITMODE            0x10
  59 #define LCD_4BITMODE            0x00
  60 #define LCD_2LINE               0x08
  61 #define LCD_1LINE               0x00
  62 #define LCD_5x10DOTS            0x04
  63 #define LCD_5x8DOTS             0x00
  64
  65 class Max_LCD : public Print {
  66         USB *pUsb;
  67
  68 public:
  69         Max_LCD(USB *pusb);
  70         void init();
  71         void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);
  72         void clear();
  73         void home();
  74         void noDisplay();
  75         void display();
  76         void noBlink();
  77         void blink();
  78         void noCursor();
  79         void cursor();
  80         void scrollDisplayLeft();
  81         void scrollDisplayRight();
  82         void leftToRight();
  83         void rightToLeft();
  84         void autoscroll();
  85         void noAutoscroll();
  86         void createChar(uint8_t, uint8_t[]);
  87         void setCursor(uint8_t, uint8_t);
  88         void command(uint8_t);
  89
  90 #if defined(ARDUINO) && ARDUINO >=100
  91         size_t write(uint8_t);
  92         using Print::write;
  93 #else
  94         void write(uint8_t);
  95 #endif
  96
  97 private:
  98         void sendbyte(uint8_t val);
  99         uint8_t _displayfunction; //tokill
 100         uint8_t _displaycontrol;
 101         uint8_t _displaymode;
 102         uint8_t _initialized;
 103         uint8_t _numlines, _currline;
 104 };
 105
 106 #endif