//定義MCU與LCD的接口
#define LCD_EN_PORT    PORTC
#define LCD_RS_PORT    PORTC
#define LCD_DATA_PORT  PORTD
#define LCD_DATA_DDR   DDRD
#define LCD_DATA_PIN   PIND

#define LCD_EN         0x20   //portc5         out
#define LCD_RS         0x10   //portc4         out
#define LCD_DATA       0xf0   //portd4/5/6/7   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);
void delay_nus              (unsigned int n);
void delay_nms              (unsigned int n);