lcd1602_4bit.h

单片机c语言程序设计100例--基于PIC+PROTEUS

//-----------------------------------------------------------------
//  名称: 1602液晶头文件
//-----------------------------------------------------------------
#define INT8U   unsigned char
#define INT16U  unsigned int
#define _XTAL_FREQ 4000000UL
//LCD命令   
#define LCD_CLS           0x01
#define LCD_HOME          0x02
#define LCD_SETMODE       0x04
#define LCD_SETVISIBLE    0x08
#define LCD_SHIFT         0x10
#define LCD_SETFUNCTION   0x20
#define LCD_SETCGADDR     0x40
#define LCD_SETDDADDR     0x80

//LCD数据与方向端口定义
#define PORT_LCD_DAT     PORTB
#define TRIS_LCD_DAT     TRISB

//LCD控制引脚
#define RS  RB0
#define RW  RB1
#define E   RB2 
//-----------------------------------------------------------------
// 函数申明
//----------------------------------------------------------------- 
void LCD_Initialize();
void LCD_BUSY_WAIT();
void clearscreen();
void write_cmd (char data);
void write_dat(char data);
void set_lcd_pos(INT8U r, INT8U c);
void LCD_showstring(INT8U r, INT8U c,char *str);