#ifndef USER_LCD_H_
#define USER_LCD_H_

#include "ch32v20x.h"

static const uint8_t LCD_RS 		 = 0x01;
static const uint8_t LCD_RW 		 = 0x02;
static const uint8_t LCD_EN 		 = 0x04;
static const uint8_t LCD_BACKLIGHT   = 0x08;
static const uint8_t LCD_NOBACKLIGHT = 0x00;

static const uint8_t LCD_4BITMODE = 0x00;
static const uint8_t LCD_2LINE = 0x08;

static const uint8_t LCD_CLEARDISPLAY   = 0x01;
static const uint8_t LCD_RETURNHOME     = 0x02;
static const uint8_t LCD_ENTRYMODESET   = 0x04;
static const uint8_t LCD_DISPLAYCONTROL = 0x08;
static const uint8_t LCD_CURSORSHIFT    = 0x10;
static const uint8_t LCD_FUNCTIONSET    = 0x20;
static const uint8_t LCD_SETCGRAMADDR   = 0x40;
static const uint8_t LCD_SETDDRAMADDR   = 0x80;

static const uint8_t LCD_BLINKOFF   = 0x00;
static const uint8_t LCD_BLINKON    = 0x01;
static const uint8_t LCD_CURSOROFF  = 0x00;
static const uint8_t LCD_CURSORON   = 0x02;
static const uint8_t LCD_DISPLAYON  = 0x04;
static const uint8_t LCD_DISPLAYOFF = 0x00;

static const uint8_t LCD_ENTRYSHIFTDEC = 0x00;
static const uint8_t LCD_ENTRYSHIFTINC = 0x01;
static const uint8_t LCD_ENTRYRIGHT    = 0x00;
static const uint8_t LCD_ENTRYLEFT     = 0x02;


typedef struct {
	uint8_t address;
	uint8_t backlight;
	uint8_t function;
	uint8_t dispctrl;
	uint8_t entrymode;
} lcd_t;

void lcd_init(lcd_t *lcd, uint8_t address);
void lcd_backlight(lcd_t *lcd);
void lcd_no_backlight(lcd_t *lcd);
void lcd_clear(lcd_t *lcd);
void lcd_home(lcd_t *lcd);
void lcd_write(lcd_t *lcd, char c);
void lcd_puts(lcd_t *lcd, char *str);
void lcd_cursor(lcd_t *lcd, uint8_t row, uint8_t col);

#endif /* USER_LCD_H_ */