#ifndef __LCD_INTERFACE_H__
#define __LCD_INTERFACE_H__

/* https://www.lcd-module.de/eng/pdf/zubehoer/ks0066.pdf */
enum LCD_Command {
    LCD_CMD_CLEAR      = 0x01,
    LCD_CMD_HOME       = 0x02,
    LCD_CMD_ENTRY_MODE = 0x04,
    LCD_CMD_ON_OFF     = 0x08,
    LCD_CMD_SHIFT      = 0x10,
    LCD_CMD_FUNCTION   = 0x20,
    LCD_CMD_CGRAM_ADDR = 0x40,
    LCD_CMD_DDRAM_ADDR = 0x80,
};

enum LCD_ENTRY_MODE_Cmd {
    LCD_ENTRY_CUR_RIGHT = 0x02,
    LCD_ENTRY_CUR_LEFT  = 0x00,
    LCD_ENTRY_DSP_RIGHT = 0x03,
    LCD_ENTRY_DSP_LEFT  = 0x01,
};

enum LCD_ON_OFF_Cmd {
    LCD_DSP_ON  = 0x04,
    LCD_DSP_OFF = 0x00,
    LCD_CUR_ON  = 0x02,
    LCD_CUR_OFF = 0x00,
    LCD_BLK_ON  = 0x01,
    LCD_BLK_OFF = 0x00,
};

enum LCD_SHIFT_Cmd {
    LCD_SH_CUR_LEFT  = 0x00,
    LCD_SH_CUR_RIGHT = 0x04,
    LCD_SH_DSP_LEFT  = 0x08,
    LCD_SH_DSP_RIGHT = 0x0C,
};

enum LCD_FUNCTION_Cmd {
    LCD_FN_4BIT     = 0x00,
    LCD_FN_8BIT     = 0x10,
    LCD_FN_1LINE    = 0x00,
    LCD_FN_2LINE    = 0x08,
    LCD_FN_5X8      = 0x00,
    LCD_FN_5X11     = 0x04,
};

#define LCD_ENTER_8BIT 0x3
#define LCD_ENTER_4BIT 0x2

enum LCD_Pins {
    B_LCD_RS  = (1<<0),
    B_LCD_RW  = (1<<1),
    B_LCD_E   = (1<<2),
    B_LCD_LED = (1<<3),
};

#define LCD_D_Pos 4

#endif /* __LCD_INTERFACE_H__ */