drv_hd44780.h

来自「最新版IAR FOR ARM（EWARM）5.11中的代码例子」· C头文件 代码 · 共 119 行

/*************************************************************************
 *
 *    Used with ICCARM and AARM.
 *
 *    (c) Copyright IAR Systems 2005
 *
 *    File name   : drv_hd44780.h
 *    Description : HD44780 Driver defenition
 *
 *    History :
 *    1. Data        : Feb 10, 2005
 *       Author      : Stanimir Bonev
 *       Description : Create
 *    1. Data        : Nov. 3, 2005
 *       Author      : Stanimir Bonev
 *       Description : modify
                        add some definitions connected
 *                     with HD44780_StrShow, HD44780_CheckVisual,
 *                     HD44780_DisplayShift, HD44780_GetDDRamAdd fuctions
 *
 *    $Revision: 6827 $
 **************************************************************************/

#ifndef  __DRV_HD44780_H
#define  __DRV_HD44780_H
#include "includes.h"

typedef Int8U HD44780_XY_DEF;
typedef Int8S HD44780_STRING_DEF;

/* Display address range definition */
#define HD44780_MIN_LINE1_ADD     0x00
#define HD44780_MAX_LINE1_ADD     0x27
#define HD44780_MIN_LINE2_ADD     0x40
#define HD44780_MAX_LINE2_ADD     0x67
/* Max DDRAM Address */
#define HD44780_MAX_DDRAM         0x67
/* Max CGRAM Address */
#define HD44780_MAX_CGRAM         0x3F
/* Address counter auto increment/decrement definition */
#define HD44780_AC_DECREMENT      0
#define HD44780_AC_INCREMENT      1
/* Auto Display shift or cursor move definition */
#define HD44780_CURSOR_MOVE       0
#define HD44780_DISPLAY_SHIFT     1
/* Number of line 1/2 definition */
#define HD44780_1_LINE            0
#define HD44780_2_LINE            1
/* Dot 5x8 or 5x10 definition */
#define HD44780_DOT_5_8           0
#define HD44780_DOT_5_10          1
/* Dispaly On/Off definition */
#define HD44780_DISPLAY_OFF       0
#define HD44780_DISPLAY_ON        1
/* Cursor On/Off definition */
#define HD44780_CURSOR_OFF        0
#define HD44780_CURSOR_ON         1
/* Cursor Blink definition */
#define HD44780_CURSOR_NORM       0
#define HD44780_CURSOR_BLINK      1
/* LCD Interface width */
#define HD44780_4_BIT             0
#define HD44780_8_BIT             1

#define LCD_LIGHT_BIT             (5)
#define LCD_RS_BIT                (6)
#define LCD_RW_BIT                (1)
#define LCD_E_BIT                 (4)
#define LCD_DATA_BIT              (2)

#define LCD_LIGHT                 (1UL << LCD_LIGHT_BIT)
#define LCD_RS                    (1UL << LCD_RS_BIT)
#define LCD_RW                    (1UL << LCD_RW_BIT)
#define LCD_E                     (1UL << LCD_E_BIT)
#define LCD_DATA                  (15UL<< LCD_DATA_BIT)

#define LCD_LIGHT_ON()            (GPIOBDATA |=  LCD_LIGHT)
#define LCD_LIGHT_OFF()           (GPIOBDATA &= ~LCD_LIGHT)

/* Delay macro */
#define HD44780_BUS_DLY()         for(volatile int dly = 30;dly;--dly)


typedef struct
{
  Int8U  DiplayPos;
  Int16U AC_Direction  : 1;
  Int16U DisplayShift  : 1;
  Int16U Line          : 1;
  Int16U DotMode       : 1;
  Int16U DisplayOn     : 1;
  Int16U CursorOn      : 1;
  Int16U CursorBlink   : 1;
} HD44780_CTRL_DEF;

typedef enum
{
  HD44780_OK = 0,
  HD44780_BUSY_TO_ERROR,
  HD44780_ERROR,
  HD44780_OUT_OF_VISUAL,
} HD44780_ERROR_CODE_DEF;

HD44780_ERROR_CODE_DEF HD44780_PowerUpInit (void);
HD44780_CTRL_DEF * HD44780_GetSetting(void);
HD44780_ERROR_CODE_DEF HD44780_SetMode (void);
HD44780_ERROR_CODE_DEF HD44780_ClearDisplay (void);
HD44780_ERROR_CODE_DEF HD44780_ReturnToHome (void);
HD44780_ERROR_CODE_DEF HD44780_DisplayShift (Boolean DisplayOn, Int8S DiplayShift);
HD44780_ERROR_CODE_DEF HD44780_CursorPosSet (Boolean CursorOn, Boolean CursorBlink, HD44780_XY_DEF X, HD44780_XY_DEF Y);
HD44780_ERROR_CODE_DEF HD44780_RdCGRAM (HD44780_STRING_DEF * CG_Data, Int8U CGRAM_Add);
HD44780_ERROR_CODE_DEF HD44780_WrCGRAM (const HD44780_STRING_DEF * CG_Data, Int8U CGRAM_Add);
HD44780_ERROR_CODE_DEF HD44780_StrShow(HD44780_XY_DEF X, HD44780_XY_DEF Y,  const HD44780_STRING_DEF * DataStr);
Int8U HD44780_GetDisplayPosition (void);

extern void Dly100us(void *arg);

#endif  /* __DRV_HD44780_H */