ATMEL公司AT89C51SND1为主控制器MP3源代码
源代码在线查看： kbd_drv.h
/*H**************************************************************************
* NAME: kbd_drv.h
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE: snd1c-refd-nf-4_0_3
* REVISION: 1.8
*----------------------------------------------------------------------------
* 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_4
#define COL1 P1_4
#define COL0 P1_3
#define MSK_PKB ((Byte)0x1B) /* 00011011 mask for unused bit of P_KBD */
#define MSK_COL ((Byte)0x18) /* 00011000 mask for columns */
#define MSK_LINE ((Byte)0x03) /* 00000011 mask for KBSTA lines */
/*----- Standart Keyboard Behavior -----*/
#define KB_STD_LVL ((Byte)0xC0) /* 11000000 level KINL1-KINL0 = 0, others = 1 */
#define KB_STD_MSK ((Byte)0x0C) /* 00001100 mask IT KINM1-KINM0 = 0, others = 1 */
#define KB_STD (KB_STD_LVL | KB_STD_MSK) /* standard keyboard conf. */
#define MSK_STD ((Byte)0xE7) /* 11100111 mask for columns */
/*----- Locked Keyboard Behavior -----*/
#define KB_LCK_LVL ((Byte)0x40) /* 01000000 level KINL2 = 1, others = 0 */
#define KB_LCK_MSK ((Byte)0x0B) /* 00001011 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)0x1B) // 00011011
#define NK_COL0 ((Byte)0x13) // 00010011
#define NK_COL1 ((Byte)0x0B) // 00001011
#define NK_COL2 (P_KBD & MSK_PKB)
#define NK_COL3 (P_KBD & MSK_PKB)
/*----- Key Definition -----*/
#define KEY_0_0 ((Byte)0x02) /* 00000010 Row0 Col0 */
#define KEY_0_1 ((Byte)0x0A) /* 00001010 Row0 Col1 */
#define KEY_1_0 ((Byte)0x01) // 00000001
#define KEY_1_1 ((Byte)0x09) // 00001001
#define KEY_X_0 ((Byte)0x10) /* 00010000 Row0 and Row1 COL0 */
#define KEY_X_1 ((Byte)0x08) /* 00001000 Row0 and Row1 COL1 */
/*----- 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)
#define Kbd_key_locked() (LOCK_ROW == 0)
void kbd_task_init (void);
#endif /* _KBD_DRV_H_ */
