terminal/lcd.h

   1 #ifndef _H_LCD
   2 #define _H_LCD
   3
   4 // LCD pins
   5 #define LCD_REGSEL  3 // Register select
   6 #define LCD_ENABLE  4 // Chip enable
   7 #define LCD_D4      5 // Data line
   8 #define LCD_D5      6 // Data line
   9 #define LCD_D6      7 // Data line
  10 #define LCD_D7      8 // Data line
  11 #define LCD_BL      2 // Backlight
  12
  13 LiquidCrystal lcd(LCD_REGSEL, LCD_ENABLE, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
  14
  15 enum backlight_state {
  16         BL_OFF,
  17         BL_ON,
  18         BL_FLASH
  19 };
  20
  21 struct backlight {
  22         enum backlight_state state;
  23         unsigned int timer;
  24 };
  25
  26 #define COLS 40
  27 #define ROWS 2
  28
  29 /**
  30  * Special characters.
  31  * See https://www.quinapalus.com/hd44780udg.html to make more.
  32  * Define which ones are used (max. 8) in setup().
  33  * When they need to be changed at runtime, make sure the cursor is disabled
  34  * and call setCursor afterwards.
  35  */
  36 unsigned char char_music[8] = {0x02,0x03,0x02,0x0e,0x1e,0x0c,0x00};
  37 unsigned char char_smile[8] = {0x00,0x00,0x0a,0x00,0x11,0x0e,0x00};
  38 unsigned char char_bar_1[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x1f};
  39 unsigned char char_bar_2[8] = {0x00,0x00,0x00,0x00,0x00,0x1f,0x1f};
  40 unsigned char char_bar_3[8] = {0x00,0x00,0x00,0x00,0x1f,0x1f,0x1f};
  41 unsigned char char_bar_4[8] = {0x00,0x00,0x00,0x1f,0x1f,0x1f,0x1f};
  42 unsigned char char_bar_5[8] = {0x00,0x00,0x1f,0x1f,0x1f,0x1f,0x1f};
  43 unsigned char char_bar_6[8] = {0x00,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f};
  44 unsigned char char_bar_7[8] = {0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f};
  45 unsigned char char_hbar_start_empty[8] = {0x1f,0x10,0x10,0x10,0x10,0x10,0x1f};
  46 unsigned char char_hbar_start_full[8]  = {0x1f,0x10,0x17,0x17,0x17,0x10,0x1f};
  47 unsigned char char_hbar_inner_empty[8] = {0x1f,0x00,0x00,0x00,0x00,0x00,0x1f};
  48 unsigned char char_hbar_inner_half[8]  = {0x1f,0x00,0x1c,0x1c,0x1c,0x00,0x1f};
  49 unsigned char char_hbar_inner_full[8]  = {0x1f,0x00,0x1f,0x1f,0x1f,0x00,0x1f};
  50 unsigned char char_hbar_end_empty[8]   = {0x1f,0x01,0x01,0x01,0x01,0x01,0x1f};
  51 unsigned char char_hbar_end_full[8]    = {0x1f,0x01,0x1d,0x1d,0x1d,0x01,0x1f};
  52
  53 void lcd_setup(void);
  54 void bl_tasks(void);
  55 void bl_set(enum backlight_state);
  56
  57 #endif