void		lcd_init(void);
void		lcd_wr_reg(uint16_t index, uint16_t val);
uint16_t	lcd_rd_reg(uint16_t index);
uint16_t	lcd_rd_data(int first);
void		lcd_wr_data(uint16_t val);
void		lcd_wr_startdata(uint16_t x, uint16_t y);
void		lcd_setpwm(uint16_t val);
void		lcd_pixel(uint16_t x, uint16_t y, uint16_t colour);
void		lcd_circle(uint16_t x0, uint16_t y0, uint16_t radius, uint16_t colour);
void		lcd_line(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t colour);

#define LCD_HEIGHT	240
#define LCD_WIDTH	320

#define RGB24_565(R, G, B) (((((R) >> 3) & 0x1f) << 11) | ((((G) >> 2) & 0x3f) << 5) | (((B) >> 3) & 0x1f))
#define LCD_WHITE	RGB24_565(255, 255, 255)
#define LCD_BLACK	RGB24_565(0, 0, 0)
#define LCD_RED		RGB24_565(255, 0, 0)
#define LCD_GREEN	RGB24_565(0, 255, 0)
#define LCD_BLUE	RGB24_565(0, 0, 255)