//定義MCU與LCD的接口
#define LCD_EN_PORT    PORTA
#define LCD_RW_PORT    PORTA
#define LCD_RS_PORT    PORTA
#define LCD_DATA_PORT  PORTA
#define LCD_DATA_DDR   DDRA
#define LCD_DATA_PIN   PINA
#define LCD_EN         0x08   //porta3        out
#define LCD_RS         0x04   //porta2        out
#define LCD_DATA       0xf0   //porta4/5/6/7   out



/*--------------------------------------------------------------------------------------------------
Public function prototypes
--------------------------------------------------------------------------------------------------*/
void LCD_init         		(void);
void LCD_write_char         (unsigned command,unsigned data);
void LCD_Write_half_char    (void);
void LCD_set_xy             (unsigned char x, unsigned char y);
void LCD_write_string       (unsigned char X,unsigned char Y,unsigned char *s);