1602lcd.h

本设计以ATMEL公司生产的AT90S8515作为控制核心

// 1602LCD.h
//

//定义MCU与LCD的接口
#define LCD_EN_PORT    PORTB
#define LCD_RW_PORT    PORTB
#define LCD_RS_PORT    PORTB
#define LCD_CTRL_DDR   DDRB

#define LCD_DATA_PORT  PORTB
#define LCD_DATA_DDR   DDRB
#define LCD_DATA_PIN   PINB

#define LCD_EN         0x08   //portb3         out
#define LCD_RW         0x04   //portb2         out/in
#define LCD_RS         0x02   //portb1         out
#define LCD_DATA       0xF0   //portb4/5/6/7   out
                        
/******************************************************
Public function prototypes
*******************************************************/
void LCD_init         (void);
void LCD_en_write     (void);
void LCD_write_char   (unsigned command,unsigned data);
void LCD_wait_Ready   (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 LCD_write        (unsigned char X, unsigned char Y,unsigned data);
void LCD_clr          (void); 
void delay_nus        (unsigned int n);
void delay_nms        (unsigned int n);
void LCD_display(unsigned char x,unsigned char y,unsigned char data_length,unsigned long int data);