lcd.h

瑞萨M16C编写的模拟PS2主机与标准键盘通讯程序.完整的工程文件,测试可用.

#ifndef LCD_H
#define LCD_H
/***********************************************************************************

FILE NAME  	:	lcd.h

DESCRIPTION	:	Driver for KS0066u LCD Module Controller (8 characters by 2 lines )
				on the Renesas RSK boards - header file

Copyright   : 2005 Renesas Technology Europe Ltd.
Copyright   : 2005 Renesas Technology Corporation.
All Rights Reserved
***********************************************************************************/

/***********************************************************************************
Revision History
DD.MM.YYYY OSO-UID Description
07.07.2005 RTE-MAB First Release
***********************************************************************************/
void InitialiseDisplay( void );
void DisplayString(unsigned char position, _far char * string);
void LCD_write(unsigned char data_or_ctrl, unsigned char value);
void LCD_nibble_write(unsigned char data_or_ctrl, unsigned char value);
void DisplayDelay(unsigned long int units);
/* RS Register Select pin */
#define RS_PIN 				p2_0
/* Display Enable pin */	
#define EN_PIN				p2_1	

/* Data bus port */
#define DATA_PORT			p2
/* Bit mask from entire port */	 	
#define DATA_PORT_MASK		0xF0
/* Number of bits data needs to shift */	
#define DATA_PORT_SHIFT		4		

#define DATA_WR 1
#define CTRL_WR 0

/* Set to ensure base delay of 1mS minimum */
#define DELAY_TIMING		0x01
/* number of lines on the LCD display */
#define NUMB_CHARS_PER_LINE	8
/* Maximum charactors per line of LCD display. */	
#define MAXIMUM_LINES		2		

#define LCD_LINE1 0
#define LCD_LINE2 16

/**********************************************************************************/
/* LCD commands - use LCD_write function to write these commands to the LCD.	  */
/**********************************************************************************/
/* Clear LCD display and home cursor */
#define LCD_CLEAR        0x01
/* move cursor to line 1 */
#define LCD_HOME_L1      0x80
/* move cursor to line 2 */      
#define LCD_HOME_L2      0xC0
/* Cursor auto decrement after R/W */  
#define CURSOR_MODE_DEC  0x04
/* Cursor auto increment after R/W */
#define CURSOR_MODE_INC  0x06
/* Setup, 4 bits,2 lines, 5X7 */
#define FUNCTION_SET     0x28
/* Display ON with Cursor */
#define LCD_CURSOR_ON    0x0E
/* Display ON with Cursor off */
#define LCD_CURSOR_OFF   0x0C
/* Display on with blinking cursor */
#define LCD_CURSOR_BLINK 0x0D
/*Move Cursor Left One Position */
#define LCD_CURSOR_LEFT  0x10
/* Move Cursor Right One Position */
#define LCD_CURSOR_RIGHT 0x14     

#define LCD_DISPLAY_ON   0x04
#define LCD_TWO_LINE     0x08

#endif