kbd_drv.h

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/*H**************************************************************************
* $RCSfile: kbd_drv.h,v $         
*----------------------------------------------------------------------------
* Copyright (c) 2002 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      $Name: DEMO_FAT_1_9_9 $      
* REVISION:     $Revision: 1.3 $     
* FILE_CVSID:   $Id: kbd_drv.h,v 1.3 2002/05/24 09:51:13 njourdan Exp $       
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the keyboard driver definition
*****************************************************************************/

#ifndef _KBD_DRV_H_
#define _KBD_DRV_H_

/*_____ I N C L U D E S ____________________________________________________*/


/*_____ M A C R O S ________________________________________________________*/

/*----- Hardware Definition -----*/
#define P_KBD           P1              /* keyboard port P1 */

#define COL2            P1_5            /* col 3 set to 0 */
#define COL1            P1_4
#define COL0            P1_3
#define MSK_PKB         ((Byte)0x3F)    /* mask for unused bit of P_KBD */
#define MSK_COL         ((Byte)0x38)    /* mask for columns: 00111000 */
#define MSK_LINE        ((Byte)0x07)    /* mask for KBSTA lines */

/*----- Standart Keyboard Behavior -----*/
#define KB_STD_LVL      ((Byte)0x80)    /* level    KINL2-KINL0 = 0, others = 1 */
#define KB_STD_MSK      ((Byte)0x08)    /* mask IT  KINM2-KINM0 = 0, others = 1 */
#define KB_STD          (KB_STD_LVL | KB_STD_MSK)   /* standard keyboard conf. */

#define MSK_STD         ((Byte)0xC7)    /* mask for columns: 11000111 */

/*----- Locked Keyboard Behavior -----*/
#define KB_LCK_LVL      ((Byte)0x40)    /* level    KINL2 = 1, others = 0 */
#define KB_LCK_MSK      ((Byte)0x0B)    /* mask IT  KINM2 = 0, others = 1 */
#define KB_LCK          (KB_LCK_LVL | KB_LCK_MSK)   /* locked keyboard conf. */

#define MSK_LCK         ((Byte)0xFF)    /* locked; mask for columns: 11111111 */

/*----- Key Decoding Mask -----*/
#define NO_KEY          ((Byte)0x3F)
#define NK_COL0         ((Byte)0x07)
#define NK_COL1         ((Byte)0x0F)
#define NK_COL2         ((Byte)0x1F)
#define NK_COL3         ((Byte)0x3F)

/*----- Key Definition -----*/
#define KEY_0_0         ((Byte)0x06)
#define KEY_0_1         ((Byte)0x0E)
#define KEY_0_2         ((Byte)0x1E)
#define KEY_0_3         ((Byte)0x3E)

#define KEY_1_0         ((Byte)0x05)
#define KEY_1_1         ((Byte)0x0D)
#define KEY_1_2         ((Byte)0x1D)
#define KEY_1_3         ((Byte)0x3D)

#define KEY_2_0         ((Byte)0x03)
#define KEY_2_1         ((Byte)0x0B)
#define KEY_2_2         ((Byte)0x1B)
#define KEY_2_3         ((Byte)0x3B)

/*----- Macro-command -----*/


/*_____ D E F I N I T I O N ________________________________________________*/


/*_____ D E C L A R A T I O N ______________________________________________*/

void    kbd_init (void);
Byte    kbd_decode (void);

#define Kbd_enable_int()        (IEN1 |= MSK_EKB)
#define Kbd_disable_int()       (IEN1 &= ~MSK_EKB)
#define Kbd_enable_pd_exit()    (KBSTA |= MSK_KPDE)
#define Kbd_disable_pd_exit()   (KBSTA &= ~MSK_KPDE)
#define Kbd_key_pressed()       ((KBSTA & MSK_LINE & ~KBCON) != 0)


#endif  /* _KBD_DRV_H_ */