lcd.h (LCD16x2-Showtime)

#ifndef _LCD_H_
    #define _LCD_H_
    #include <htc.h>
    //Khai bao tan so thach anh dao dong
    #ifndef _XTAL_FREQ
        #define _XTAL_FREQ  4000000
    #endif
    //Cac khai bao dieu khien bat/tat hien thi
    #define DON         0b00001111 //Bat hien thi
    #define DOFF        0b00001011 //Tat hien thi
    #define CURSOR_ON   0b00001111 //Bat con tro
    #define CURSOR_OFF  0b00001101 //Tat con tro
    #define BLINK_ON    0b00001111 //Nhap nhay con tro
    #define BLINK_OFF   0b00001110 //Khong nhap nhay con tro
    //Cac khai bao dich chuyen hien thi va con tro
    #define SHIFT_CUR_LEFT      0b00000100 //Con tro dich sang trai
    #define SHIFT_CUR_RIGHT     0b00000101 //Con tro dich sang phai
    #define SHIFT_DISP_LEFT     0b00000110 //Hien thi dich sang trai
    #define SHIFT_DISP_RIGHT    0b00000111 //Hien thi dich sang phai
    //Cac khai bao thiet lap chuc nang
    #define FOUR_BIT    0b00101100 //Giao dien 4-bit
    #define EIGHT_BIT   0b00111100 //Giao dien 8-bit
    #define LINE_5X7    0b00110000 //Ky tu 5x7, mot hang
    #define LINE_5X10   0b00110100 //Ky tu 5x10
    #define LINES_5X7   0b00111000 //Ky tu 5x7, nhieu hang
    //Cac khai bao ket noi chan LCD voi PIC
    #ifndef     LCD_RS
        #define LCD_RS      RD1
        #define LCD_EN      RD3
        #define LCD_RW      RD2
        #define LCD_DATA4   RD4
        #define LCD_DATA5   RD5
        #define LCD_DATA6   RD6
        #define LCD_DATA7   RD7
        #define LCD_RS_TRIS     TRISD1
        #define LCD_EN_TRIS     TRISD3
        #define LCD_RW_TRIS     TRISD2
        #define LCD_DATA4_TRIS  TRISD4
        #define LCD_DATA5_TRIS  TRISD5
        #define LCD_DATA6_TRIS  TRISD6
        #define LCD_DATA7_TRIS  TRISD7
    #endif
    //Khai bao bien du lieu 8-bit
    typedef union _BYTE_VAL
    {
        unsigned char Val;
        struct
        {
            unsigned char b0:1;
            unsigned char b1:1;
            unsigned char b2:1;
            unsigned char b3:1;
            unsigned char b4:1;
            unsigned char b5:1;
            unsigned char b6:1;
            unsigned char b7:1;
        }bits;
    }BYTE_VAL;
    //Khai bao cac lenh dung cho LCD
    void lcd_init(); //Khoi dong LCD.
    unsigned char lcd_busy(); //Thong bao LCD ban xu ly thong tin.
    unsigned char lcd_get_byte(unsigned char rs); //Doc mot byte du lieu tu LCD.
    void lcd_put_byte(unsigned char a,unsigned char b); //Ghi mot byte du lieu/lenh den LCD.
    void lcd_gotoxy(unsigned char col,unsigned char row); //Dinh toa do tren LCD.
    void lcd_putc(char c); //Ghi mot ky tu den LCD.
    void lcd_puts(const char* s); //Ghi mot chuoi den LCD.
#endif