software/c++/ruwaicom/include/lcddisplay.h

   1 /*--------------------------------------------------------------------------*/
   2 // LICENSE
   3 //
   4 // This file is part of ruwai.
   5 //
   6 // If you use ruwai_parser in any program or publication, please inform and
   7 // acknowledge its author Stefan Mertl (stefan@mertl-research.at).
   8 //
   9 // ruwai is free software: you can redistribute it and/or modify
  10 // it under the terms of the GNU General Public License as published by
  11 // the Free Software Foundation, either version 3 of the License, or
  12 // (at your option) any later version.
  13 //
  14 // This program is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License
  20 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 /*--------------------------------------------------------------------------*/
  22
  23 #ifndef LCDDISPLAY_H
  24 #define LCDDISPLAY_H
  25
  26 #include "libgpio/gpio.h"
  27 #include <string>
  28
  29
  30 #define LCD_DELAY_ENABLE_PULSE 2
  31 #define LCD_LONG_DELAY 1600
  32 #define LCD_SHORT_DELAY 50
  33
  34
  35 #define LCD_CMD_CLEAR_DISPLAY 0x01
  36 #define LCD_CMD_RETURN_HOME 0x02
  37 #define LCD_CMD_ENTRY_MODE_SET 0x04
  38 #define LCD_CMD_DISPLAY 0x08
  39 #define LCD_CMD_SHIFT 0x10
  40 #define LCD_CMD_FUNCTION_SET 0x20
  41 #define LCD_CMD_SET_CGRAM_ADDR 0x40
  42 #define LCD_CMD_SET_DDRAM_ADDR 0x80
  43
  44 #define LCD_ENTRY_DISPLAY_SHIFT 0x01
  45 #define LCD_ENTRY_CURSOR_INCREMENT 0x02
  46 #define LCD_DISPLAY_CURSOR_BLINKS 0x01
  47 #define LCD_DISPLAY_CURSOR_ON 0x02
  48 #define LCD_DISPLAY_DISPLAY_ON 0X04
  49 #define LCD_SHIFT_RIGHT 0x04
  50 #define LCD_SHIFT_DISPLAY 0x08
  51 #define LCD_FUNCTION_5X10_DOTS 0X04
  52 #define LCD_FUNCTION_TWO_LINES 0X08
  53 #define LCD_FUNCTION_8BIT_MODE 0X10
  54
  55
  56
  57 class LCDDisplay {
  58
  59     private:
  60         GPIO* rs_gpio;
  61         GPIO* e_gpio;
  62         GPIO* db0_gpio;
  63         GPIO* db1_gpio;
  64         GPIO* db2_gpio;
  65         GPIO* db3_gpio;
  66         GPIO* db4_gpio;
  67         GPIO* db5_gpio;
  68         GPIO* db6_gpio;
  69         GPIO* db7_gpio;
  70
  71         int mode;
  72
  73     public:
  74         LCDDisplay(int rs_gpio, int e_gpio, int db0_gpio, int db1_gpio, int db2_gpio, int db3_gpio, int db4_gpio, int db5_gpio, int db6_gpio, int db7_gpio);
  75         LCDDisplay(int rs_gpio, int e_gpio, int db4_gpio, int db5_gpio, int db6_gpio, int db7_gpio);
  76         void init(void);
  77         void clear(void);
  78         void home(void);
  79         void write_data(std::uint8_t data);
  80         void print(std::string msg_line1, std::string msg_line2);
  81
  82     private:
  83         void init_4bit(void);
  84         void init_8bit(void);
  85         void write_4bit(std::uint8_t data, bool command);
  86         void write_4bit_high_only(std::uint8_t data, bool command);
  87         void write_8bit(std::uint8_t data, bool command);
  88         void write_command(std::uint8_t data);
  89         void toggle_e(void);
  90 };
  91
  92
  93 #endif /* LCDDISPLAY_H */