#pragma once

#include <stddef.h>
#include <stdint.h>

void lcd_init();

bool lcd_ok();
uint8_t lcd_addr();

void lcd_set_backlight(bool on);
bool lcd_backlight();

void lcd_clear();
void lcd_set_line(uint8_t row, const char *text);
void lcd_get_line(uint8_t row, char *out, size_t out_len);

/** 写入两行示例文案并点亮背光 */
void lcd_demo(uint8_t index);
uint8_t lcd_demo_count();