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XLCD.H
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#ifndef __XLCD_H
#define __XLCD_H
#include "p18cxxx.h"
/* PIC18 XLCD peripheral routines.
*
* Notes:
* - These libraries routines are written to support the
* Hitachi HD44780 LCD controller.
* - The user must define the following items:
* - The LCD interface type (4- or 8-bits)
* - If 4-bit mode
* - whether using the upper or lower nibble
* - The data port
* - The tris register for data port
* - The control signal ports and pins
* - The control signal port tris and pins
* - The user must provide three delay routines:
* - DelayFor18TCY() provides a 18 Tcy delay
* - DelayPORXLCD() provides at least 15ms delay
* - DelayXLCD() provides at least 5ms delay
*/
/* Interface type 8-bit or 4-bit
* For 8-bit operation uncomment the #define BIT8
*/
/* #define BIT8 */
/* When in 4-bit interface define if the data is in the upper
* or lower nibble. For lower nibble, comment the #define UPPER
*/
/* #define UPPER */
/* DATA_PORT defines the port to which the LCD data lines are connected */
#define DATA_PORT PORTB
#define TRIS_DATA_PORT TRISB
/* CTRL_PORT defines the port where the control lines are connected.
* These are just samples, change to match your application.
*/
#define E_PIN LATAbits.LATA1 /* PORT for D */
#define TRIS_E TRISAbits.TRISA1 /* TRIS for E */
#define RW_PIN LATAbits.LATA2 /* PORT for RW */
#define TRIS_RW TRISAbits.TRISA2 /* TRIS for RW */
#define RS_PIN LATAbits.LATA3 /* PORT for RS */
#define TRIS_RS TRISAbits.TRISA3 /* TRIS for RS */
/* Display ON/OFF Control defines */
#define DON 0b00001111 /* Display on */
#define DOFF 0b00001011 /* Display off */
#define CURSOR_ON 0b00001111 /* Cursor on */
#define CURSOR_OFF 0b00001101 /* Cursor off */
#define BLINK_ON 0b00001111 /* Cursor Blink */
#define BLINK_OFF 0b00001110 /* Cursor No Blink */
/* Cursor or Display Shift defines */
#define SHIFT_CUR_LEFT 0b00000100 /* Cursor shifts to the left */
#define SHIFT_CUR_RIGHT 0b00000101 /* Cursor shifts to the right */
#define SHIFT_DISP_LEFT 0b00000110 /* Display shifts to the left */
#define SHIFT_DISP_RIGHT 0b00000111 /* Display shifts to the right */
/* Function Set defines */
#define FOUR_BIT 0b00101100 /* 4-bit Interface */
#define EIGHT_BIT 0b00111100 /* 8-bit Interface */
#define LINE_5X7 0b00110000 /* 5x7 characters, single line */
#define LINE_5X10 0b00110100 /* 5x10 characters */
#define LINES_5X7 0b00111000 /* 5x7 characters, multiple line */
#ifdef _OMNI_CODE_
#define PARAM_SCLASS
#else
#define PARAM_SCLASS auto
#endif
#ifndef MEM_MODEL
#ifdef _OMNI_CODE_
#define MEM_MODEL
#else
#define MEM_MODEL far /* Change this to near for small memory model */
#endif
#endif
/* OpenXLCD
* Configures I/O pins for external LCD
*/
void OpenXLCD(PARAM_SCLASS unsigned char);
/* SetCGRamAddr
* Sets the character generator address
*/
void SetCGRamAddr(PARAM_SCLASS unsigned char);
/* SetDDRamAddr
* Sets the display data address
*/
void SetDDRamAddr(PARAM_SCLASS unsigned char);
/* BusyXLCD
* Returns the busy status of the LCD
*/
unsigned char BusyXLCD(void);
/* ReadAddrXLCD
* Reads the current address
*/
unsigned char ReadAddrXLCD(void);
/* ReadDataXLCD
* Reads a byte of data
*/
char ReadDataXLCD(void);
/* WriteCmdXLCD
* Writes a command to the LCD
*/
void WriteCmdXLCD(PARAM_SCLASS unsigned char);
/* WriteDataXLCD
* Writes a data byte to the LCD
*/
void WriteDataXLCD(PARAM_SCLASS char);
/* putcXLCD
* A putc is a write
*/
#define putcXLCD WriteDataXLCD
/* putsXLCD
* Writes a string of characters to the LCD
*/
void putsXLCD(PARAM_SCLASS char *);
/* putrsXLCD
* Writes a string of characters in ROM to the LCD
*/
void putrsXLCD(const char *);
/* User defines these routines according to the oscillator frequency */
extern void DelayFor18TCY(void);
extern void DelayPORXLCD(void);
extern void DelayXLCD(void);
#endif