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lcd.h

#ifndef _DEV_LCD_H_
#define _DEV_LCD_H_

#include <sys/device.h>

/*
 * Offset from base address of lcd data register
 */
#define LCD_DATA 1

/*
 * Offset from base address of lcd command register
 */
#define LCD_REG  0

/*
 * Max lcd width in bytes represented characters 
 */
#define MAX_LCD_WIDTH  0x40

/*
 * Clear command
 */
#define LCD_CLEAR               0x01

/*
 * Command to move cursor to start.
 */
#define CURSOR_TO_START         0x02

/*
 * Tryb lcd
 */
#define LCD_TRYB                0x06

/*
 * Behavior of coursor when write data to lcd
 */
#define AUTO_MOVING_CURSOR      0x00

/*
 * Behavior of frame when write data to lcd
 */
#define AUTO_MOVING_FRAME       0x01


#define LCD_CONFIG              0x08
#define BLINK_ON                0x01
#define BLINK_OFF               0x00
#define CURSOR_ON               0x02
#define CURSOR_OFF              0x00
#define LCD_ON                  0x04
#define LCD_OFF                 0x00


#define LCD_COMMAND             0x10
#define MOVE_CURSOR             0x00
#define MOVE_FRAME              0x01
#define MOVE_LEFT               0x00
#define MOVE_RIGHT              0x01



#define INTERFACE_8_BITS        0x38
#define INTERFACE_4_BITS        0x28


#define SET_RAM_TO_DEF_CHAR     0x40


#define SET_RAM_POINTER         0x80
#define RAM_START_F_LINE        0x00
#define RAM_START_S_LINE        0x40


#define BUSY_MASK               0x80
#define BUSY                    0x80


//constans
#define INTERFACE_TYPE_8_BITS   0x00
#define INTERFACE_TYPE_4_BITS   0xFF

#define CHAR_80                 0x80
#define CHAR_40                 0x40
#define CHAR_20                 0x20
#define CHAR_20                 0x20

#define IS_BLINKING             0x01
#define NOT_BLINKING            0x02

#define CURSOR_IS_VISIBLE       0x01
#define CURSOR_NOT_VISIBLE      0x02

#define LCD_IS_ON               0x01
#define LCD_IS_OFF              0x02


//constans to ioctl
#define CLEAR_LCD_IOCTL         0x01
#define CURSOR_TO_START_IOCTL   0x02
#define LCD_TRYB_IOCTL          0x03
#define LCD_COMMAND_IOCTL       0x04
#define LCD_MOVING_IOCTL        0x05
#define LCD_MOVING_TRYB_IOCTL   0x06



typedef struct _LCDDCB LCDDCB;

struct _LCDDCB {
        u_int  cursorPosition;
        u_char lcdTryb;
        u_char cursorVisible;
        u_char blinking;
        u_char lcdStatus;
        u_char interfaceType;
        u_char lcdWidth;

        HANDLE output_start;

        HANDLE tx_rdy;
};


extern NUTDEVICE devLcd0;
#endif

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