MP3播放器详细设计方案
源代码在线查看： lcd_drv.h
/*H**************************************************************************
* $RCSfile: lcd_drv.h,v $
*----------------------------------------------------------------------------
* Copyright (c) 2002 Atmel.
*----------------------------------------------------------------------------
* RELEASE: $Name: DEMO_FAT_1_9_9 $
* REVISION: $Revision: 1.5 $
* FILE_CVSID: $Id: lcd_drv.h,v 1.5 2002/05/24 09:51:15 njourdan Exp $
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the LCD controller definition
*
* NOTES:
* Definition for Hitachi HD44780 LCD controller:
*
* - 2x16 characters
* - 8 bit interface
*
* DB7:0 = AD7:0
* RS = A0
* R/W = '0' not used, busy is never tested
* E = P3.6/WR# inverted
*****************************************************************************/
#ifndef _LCD_DRV_H_
#define _LCD_DRV_H_
/*_____ I N C L U D E S ____________________________________________________*/
/*_____ M A C R O S ________________________________________________________*/
/*----- LCD timing -----*/
#define TEMPO_40US (Byte)(0.0019*FPER) /* tempo duration of 40 us */
#define TEMPO_1_5MS (Uint16)(0.06*FPER) /* tempo duration of 1.5 ms */
#define TEMPO_30MS (TEMPO_1_5MS * 20) /* tempo duration of 30 ms */
/*----- LCD control -----*/
#define LCD_NB_LINE (Byte)0x02 /* 2 display lines */
#define LCD_NB_COLUMN (Byte)0x10 /* 16 characters per line */
#define C_R (char)0x0D
#define L_F (char)0x0A
#define B_S (char)0x08
/*----- LCD command -----*/
#define LCD_CLR (Byte)0x01 /* clear entire display */
#define LCD_HOME (Byte)0x02 /* cursor back to home position */
#define LCD_SET (Byte)0x04 /* set cursor move direction and specifies shift or display */
#define LCD_NO_INC (Byte)0x00 /* inc OFF */
#define LCD_INC (Byte)0x02 /* inc ON */
#define LCD_NO_SHIFT (Byte)0x00 /* no shift */
#define LCD_SHIFT (Byte)0x01 /* shift entire display */
#define LCD_DISPLAY (Byte)0x08 /* control Display,cursor,blink - ON / OFF */
#define LCD_DISP_OFF (Byte)0x08 /* display OFF */
#define LCD_DISP_ON (Byte)0x0C /* display ON */
#define LCD_CURS_OFF (Byte)0x00 /* cursor OFF */
#define LCD_CURS_ON (Byte)0x02 /* cursor ON */
#define LCD_BLINK_OFF (Byte)0x00 /* cursor blink OFF */
#define LCD_BLINK_ON (Byte)0x01 /* cursor blink ON */
#define LCD_CURS (Byte)0x10 /* move Cursor and shift display */
#define LCD_CURS_SHIFT (Byte)0x00 /* cursor shift */
#define LCD_DISP_SHIFT (Byte)0x08 /* display shift */
#define LCD_RIGHT (Byte)0x04 /* cursor/display shift right */
#define LCD_LEFT (Byte)0x00 /* cursor/display shift left */
#define LCD_FCTSET (Byte)0x20 /* Set: 4 bits mode , nb of lines, nb of dot matrix */
#define LCD_4BIT (Byte)0x00 /* command for 4 bit mode */
#define LCD_8BIT (Byte)0x10 /* command for 8 bit mode */
#define LCD_1_LINE (Byte)0x00 /* set in 1 Line mode */
#define LCD_2_LINE (Byte)0x08 /* set in 2 Line mode */
#define LCD_5x8DOTS (Byte)0x00 /* set in 5*8 dots */
#define LCD_5x11DOTS (Byte)0x04 /* set in 5*11 dots */
#define LCD_CGRAM (Byte)0x40 /* Set CG RAM address */
#define LCD_DDRAM (Byte)0x80 /* Set DD RAM adresse */
#define LCD_BF (Byte)0x08 /* busy flag */
#define LCD_SHIFT (Byte)0x01 /* shift ON */
#define LCD_DATA (Byte)0x0F /* data mask on 4 bit */
#define LCD_LINE0 (Byte)0x80 /* line 0 command */
#define LCD_LINE1 (Byte)0xC0 /* line 1 command */
#define LCD_LINE_OFFSET (Byte)0x40 /* line address offset */
/*----- CGRAM -----*/
#define CGRAM_CHAR_SIZE (Byte)0x08 /* 8 patterns to define a char */
/*_____ D E F I N I T I O N ________________________________________________*/
extern xdata Byte lcd_cmd;
extern xdata Byte lcd_data;
/*_____ D E C L A R A T I O N ______________________________________________*/
#define Lcd_cur_on() lcd_cmd = (LCD_DISP_ON | LCD_CURS_ON | LCD_BLINK_ON)
#define Lcd_cur_off() lcd_cmd = LCD_DISP_ON
#define Lcd_put_char(c) lcd_data = c
#define Lcd_put_cmd(c) lcd_cmd = c
void lcd_init (void);
void lcd_clr (void);
void lcd_set_cur (Byte, Byte);
void lcd_cgram (Byte, Byte code *);
void lcd_putchar (char);
#endif /* _LCD_DRV_H_ */
