Email: Password: Remember Me | Create Account (Free)

lcd.h

/*
 * lcd.h: function prototypes for 8051-based interface to the usual Hitachi 
 * LCD controller.
 *
 * © 2004 ASP Digital.  All rights reserved.
 * Andy Peters, devel@latke.net
 */
#ifndef _LCD_H
#define _LCD_H

/*
 * LcdWriteChar()
 * Writes a character to the display at the current cursor location.
 * Parameters: 
 *     unsigned char dval: the character to write to the display (see
 *       the Hitachi data sheet)
 * Returns: nothing
 */
void LcdWriteChar(unsigned char dval);

/*
 * LcdWriteString()
 * Writes a string to the display, starting at the current cursor location.
 * Parameters: 
 *     unsigned char *str: pointer to the string to write to the display
 * Returns: nothing
 */
void LcdWriteString(unsigned char *str);

/*
 * LcdMoveCursor()
 * Moves the cursor to a specific row and column.
 * Parameters:
 *     unsigned char row: Put the cursor on this row.
 *     unsigned char col: Put the cursor in this column.
 * Returns: nothing
 * Note: No bounds checking is performed, so it's possible to set an illegal
 *       location.
 */
void LcdMoveCursor(unsigned char row, unsigned char col);

/*
 * LcdInit()
 * Prepare the LCD for use.  This function should be called before attempting
 * to actually use the LCD.
 * Parameters: none.
 * Returns: nothing.
 */
void LcdInit(void);

/*
 * LcdClear()
 * Clear the display and return the cursor to the home position.
 * Parameters: none.
 * Returns: nothing
 */
void LcdClear(void);

#endif