srtruct input_event学习

srtruct input_event结构体是linux输入子系统的向应用层传递的接口。

在一个输入设备中,每发生一次输入事件,srtruct input_event就会被填充。

/*
 * The event structure itself
 */

struct input_event {
	struct timeval time;   /* 表示输入时的时间 */
	__u16 type;            /* 表示输入设备时那个东西,常用的有鼠标,键盘等 */
	__u16 code;            /* 根据不同的type有code,类型比如键盘的那个按键,鼠标的那个按键等 */
	__s32 value;           /* 根据不同的type和code决定,比如键盘A键按下和松开,鼠标的移动方向等 */
};

接下来我们看具体的type的有哪些

/*
 * Event types
 */

#define EV_SYN			0x00        /* 同步事件,通常一个输入事件结束都会有一个同步事件,作为分隔两个输入事件 */
#define EV_KEY			0x01        /* 按键类事件,作为描述设备的键值 */
#define EV_REL			0x02        /* relative相对输入事件,主要是用来描述鼠标类设备这次移动相对上次移动的偏移值*/
#define EV_ABS			0x03        /* absoluate绝对输入事件,主要是用来描述触摸屏类设备的按键值 */
#define EV_MSC			0x04        /* 其它事件 */
#define EV_SW			0x05        /* 开关事件 */
#define EV_LED			0x11        /* 灯光事件 */
#define EV_SND			0x12        /* 声音事件,比如:hey,Siri */
#define EV_REP			0x14        /* 重复类事件 */
#define EV_FF			0x15        /* 力反馈事件,比如指纹识别 */
#define EV_PWR			0x16        /* 电源事件,比如我按了电源按键,手机就应该处于待机状态 */
#define EV_FF_STATUS		0x17    /* 受力状态事件,比如按下电源键5s,就应该关机 */
#define EV_MAX			0x1f
#define EV_CNT			(EV_MAX+1)
/*
 * Synchronization events.
 */

#define SYN_REPORT		0        /* 这个是最多的,即报告一次事件完成或结束 */
#define SYN_CONFIG		1        /*  */
#define SYN_MT_REPORT		2

 


/*
 * Keys and buttons       /* 下面的键值特别多,我们主要知道键盘鼠标之类的就可以遇到特殊设备了在学习 */
 *
 * Most of the keys/buttons are modeled after USB HUT 1.12
 * (see http://www.usb.org/developers/hidpage).
 * Abbreviations in the comments:
 * AC - Application Control                /* 应用控制 */
 * AL - Application Launch Button          /* 应用启动按键 */
 * SC - System Control                     /* 系统控制按键 */
 */

/* 0是保留的,下面就是键盘设备每个键的键值 */
#define KEY_RESERVED		0
#define KEY_ESC			1
#define KEY_1			2
#define KEY_2			3
#define KEY_3			4
#define KEY_4			5
#define KEY_5			6
#define KEY_6			7
#define KEY_7			8
#define KEY_8			9
#define KEY_9			10
#define KEY_0			11
#define KEY_MINUS		12
#define KEY_EQUAL		13
#define KEY_BACKSPACE		14
#define KEY_TAB			15
#define KEY_Q			16
#define KEY_W			17
#define KEY_E			18
#define KEY_R			19
#define KEY_T			20
#define KEY_Y			21
#define KEY_U			22
#define KEY_I			23
#define KEY_O			24
#define KEY_P			25
#define KEY_LEFTBRACE		26
#define KEY_RIGHTBRACE		27
#define KEY_ENTER		28
#define KEY_LEFTCTRL		29
#define KEY_A			30
#define KEY_S			31
#define KEY_D			32
#define KEY_F			33
#define KEY_G			34
#define KEY_H			35
#define KEY_J			36
#define KEY_K			37
#define KEY_L			38
#define KEY_SEMICOLON		39
#define KEY_APOSTROPHE		40
#define KEY_GRAVE		41
#define KEY_LEFTSHIFT		42
#define KEY_BACKSLASH		43
#define KEY_Z			44
#define KEY_X			45
#define KEY_C			46
#define KEY_V			47
#define KEY_B			48
#define KEY_N			49
#define KEY_M			50
#define KEY_COMMA		51
#define KEY_DOT			52
#define KEY_SLASH		53
#define KEY_RIGHTSHIFT		54
#define KEY_KPASTERISK		55
#define KEY_LEFTALT		56
#define KEY_SPACE		57
#define KEY_CAPSLOCK		58
#define KEY_F1			59
#define KEY_F2			60
#define KEY_F3			61
#define KEY_F4			62
#define KEY_F5			63
#define KEY_F6			64
#define KEY_F7			65
#define KEY_F8			66
#define KEY_F9			67
#define KEY_F10			68
#define KEY_NUMLOCK		69
#define KEY_SCROLLLOCK		70
#define KEY_KP7			71
#define KEY_KP8			72
#define KEY_KP9			73
#define KEY_KPMINUS		74
#define KEY_KP4			75
#define KEY_KP5			76
#define KEY_KP6			77
#define KEY_KPPLUS		78
#define KEY_KP1			79
#define KEY_KP2			80
#define KEY_KP3			81
#define KEY_KP0			82
#define KEY_KPDOT		83

#define KEY_ZENKAKUHANKAKU	85
#define KEY_102ND		86
#define KEY_F11			87
#define KEY_F12			88
#define KEY_RO			89
#define KEY_KATAKANA		90
#define KEY_HIRAGANA		91
#define KEY_HENKAN		92
#define KEY_KATAKANAHIRAGANA	93
#define KEY_MUHENKAN		94
#define KEY_KPJPCOMMA		95
#define KEY_KPENTER		96
#define KEY_RIGHTCTRL		97
#define KEY_KPSLASH		98
#define KEY_SYSRQ		99
#define KEY_RIGHTALT		100
#define KEY_LINEFEED		101
#define KEY_HOME		102
#define KEY_UP			103
#define KEY_PAGEUP		104
#define KEY_LEFT		105
#define KEY_RIGHT		106
#define KEY_END			107
#define KEY_DOWN		108
#define KEY_PAGEDOWN		109
#define KEY_INSERT		110
#define KEY_DELETE		111
#define KEY_MACRO		112
#define KEY_MUTE		113
#define KEY_VOLUMEDOWN		114
#define KEY_VOLUMEUP		115
#define KEY_POWER		116	/* SC System Power Down */
#define KEY_KPEQUAL		117
#define KEY_KPPLUSMINUS		118
#define KEY_PAUSE		119
#define KEY_SCALE		120	/* AL Compiz Scale (Expose) */

#define KEY_KPCOMMA		121
#define KEY_HANGEUL		122
#define KEY_HANGUEL		KEY_HANGEUL
#define KEY_HANJA		123
#define KEY_YEN			124
#define KEY_LEFTMETA		125
#define KEY_RIGHTMETA		126
#define KEY_COMPOSE		127

/* 下面可以理解为是一些组合按键,比如copy是ctrl + c,paste是ctrl + v等等 */
#define KEY_STOP		128	/* AC Stop */
#define KEY_AGAIN		129
#define KEY_PROPS		130	/* AC Properties */
#define KEY_UNDO		131	/* AC Undo */
#define KEY_FRONT		132
#define KEY_COPY		133	/* AC Copy */
#define KEY_OPEN		134	/* AC Open */
#define KEY_PASTE		135	/* AC Paste */
#define KEY_FIND		136	/* AC Search */
#define KEY_CUT			137	/* AC Cut */
#define KEY_HELP		138	/* AL Integrated Help Center */
#define KEY_MENU		139	/* Menu (show menu) */
#define KEY_CALC		140	/* AL Calculator */
#define KEY_SETUP		141
#define KEY_SLEEP		142	/* SC System Sleep */
#define KEY_WAKEUP		143	/* System Wake Up */
#define KEY_FILE		144	/* AL Local Machine Browser */
#define KEY_SENDFILE		145
#define KEY_DELETEFILE		146
#define KEY_XFER		147
#define KEY_PROG1		148
#define KEY_PROG2		149
#define KEY_WWW			150	/* AL Internet Browser */
#define KEY_MSDOS		151
#define KEY_COFFEE		152	/* AL Terminal Lock/Screensaver */
#define KEY_SCREENLOCK		KEY_COFFEE
#define KEY_DIRECTION		153
#define KEY_CYCLEWINDOWS	154
#define KEY_MAIL		155
#define KEY_BOOKMARKS		156	/* AC Bookmarks */
#define KEY_COMPUTER		157
#define KEY_BACK		158	/* AC Back */
#define KEY_FORWARD		159	/* AC Forward */
#define KEY_CLOSECD		160
#define KEY_EJECTCD		161
#define KEY_EJECTCLOSECD	162
#define KEY_NEXTSONG		163
#define KEY_PLAYPAUSE		164
#define KEY_PREVIOUSSONG	165
#define KEY_STOPCD		166
#define KEY_RECORD		167
#define KEY_REWIND		168
#define KEY_PHONE		169	/* Media Select Telephone */
#define KEY_ISO			170
#define KEY_CONFIG		171	/* AL Consumer Control Configuration */
#define KEY_HOMEPAGE		172	/* AC Home */
#define KEY_REFRESH		173	/* AC Refresh */
#define KEY_EXIT		174	/* AC Exit */
#define KEY_MOVE		175
#define KEY_EDIT		176
#define KEY_SCROLLUP		177
#define KEY_SCROLLDOWN		178
#define KEY_KPLEFTPAREN		179
#define KEY_KPRIGHTPAREN	180
#define KEY_NEW			181	/* AC New */
#define KEY_REDO		182	/* AC Redo/Repeat */

/* 这个应该是特殊键盘使用吧?我的键盘就到F12耶 */
#define KEY_F13			183
#define KEY_F14			184
#define KEY_F15			185
#define KEY_F16			186
#define KEY_F17			187
#define KEY_F18			188
#define KEY_F19			189
#define KEY_F20			190
#define KEY_F21			191
#define KEY_F22			192
#define KEY_F23			193
#define KEY_F24			194

#define KEY_PLAYCD		200
#define KEY_PAUSECD		201
#define KEY_PROG3		202
#define KEY_PROG4		203
#define KEY_DASHBOARD		204	/* AL Dashboard */
#define KEY_SUSPEND		205
#define KEY_CLOSE		206	/* AC Close */
#define KEY_PLAY		207
#define KEY_FASTFORWARD		208
#define KEY_BASSBOOST		209
#define KEY_PRINT		210	/* AC Print */
#define KEY_HP			211
#define KEY_CAMERA		212
#define KEY_SOUND		213
#define KEY_QUESTION		214
#define KEY_EMAIL		215
#define KEY_CHAT		216
#define KEY_SEARCH		217
#define KEY_CONNECT		218
#define KEY_FINANCE		219	/* AL Checkbook/Finance */
#define KEY_SPORT		220
#define KEY_SHOP		221
#define KEY_ALTERASE		222
#define KEY_CANCEL		223	/* AC Cancel */
#define KEY_BRIGHTNESSDOWN	224
#define KEY_BRIGHTNESSUP	225
#define KEY_MEDIA		226

#define KEY_SWITCHVIDEOMODE	227	/* Cycle between available video
					   outputs (Monitor/LCD/TV-out/etc) */
#define KEY_KBDILLUMTOGGLE	228
#define KEY_KBDILLUMDOWN	229
#define KEY_KBDILLUMUP		230

#define KEY_SEND		231	/* AC Send */
#define KEY_REPLY		232	/* AC Reply */
#define KEY_FORWARDMAIL		233	/* AC Forward Msg */
#define KEY_SAVE		234	/* AC Save */
#define KEY_DOCUMENTS		235

#define KEY_BATTERY		236

#define KEY_BLUETOOTH		237
#define KEY_WLAN		238
#define KEY_UWB			239

#define KEY_UNKNOWN		240

#define KEY_VIDEO_NEXT		241	/* drive next video source */
#define KEY_VIDEO_PREV		242	/* drive previous video source */
#define KEY_BRIGHTNESS_CYCLE	243	/* brightness up, after max is min */
#define KEY_BRIGHTNESS_ZERO	244	/* brightness off, use ambient */
#define KEY_DISPLAY_OFF		245	/* display device to off state */

#define KEY_WIMAX		246
#define KEY_RFKILL		247	/* Key that controls all radios */

/* Code 255 is reserved for special needs of AT keyboard driver */

#define BTN_MISC		0x100
#define BTN_0			0x100
#define BTN_1			0x101
#define BTN_2			0x102
#define BTN_3			0x103
#define BTN_4			0x104
#define BTN_5			0x105
#define BTN_6			0x106
#define BTN_7			0x107
#define BTN_8			0x108
#define BTN_9			0x109

/* 鼠标按键,包括,左,右,中,以及游戏鼠标新增的一些按键等 */
#define BTN_MOUSE		0x110
#define BTN_LEFT		0x110
#define BTN_RIGHT		0x111
#define BTN_MIDDLE		0x112
#define BTN_SIDE		0x113
#define BTN_EXTRA		0x114
#define BTN_FORWARD		0x115
#define BTN_BACK		0x116
#define BTN_TASK		0x117

#define BTN_JOYSTICK		0x120
#define BTN_TRIGGER		0x120
#define BTN_THUMB		0x121
#define BTN_THUMB2		0x122
#define BTN_TOP			0x123
#define BTN_TOP2		0x124
#define BTN_PINKIE		0x125
#define BTN_BASE		0x126
#define BTN_BASE2		0x127
#define BTN_BASE3		0x128
#define BTN_BASE4		0x129
#define BTN_BASE5		0x12a
#define BTN_BASE6		0x12b
#define BTN_DEAD		0x12f

#define BTN_GAMEPAD		0x130
#define BTN_A			0x130
#define BTN_B			0x131
#define BTN_C			0x132
#define BTN_X			0x133
#define BTN_Y			0x134
#define BTN_Z			0x135
#define BTN_TL			0x136
#define BTN_TR			0x137
#define BTN_TL2			0x138
#define BTN_TR2			0x139
#define BTN_SELECT		0x13a
#define BTN_START		0x13b
#define BTN_MODE		0x13c
#define BTN_THUMBL		0x13d
#define BTN_THUMBR		0x13e

#define BTN_DIGI		0x140
#define BTN_TOOL_PEN		0x140
#define BTN_TOOL_RUBBER		0x141
#define BTN_TOOL_BRUSH		0x142
#define BTN_TOOL_PENCIL		0x143
#define BTN_TOOL_AIRBRUSH	0x144
#define BTN_TOOL_FINGER		0x145
#define BTN_TOOL_MOUSE		0x146
#define BTN_TOOL_LENS		0x147
#define BTN_TOUCH		0x14a
#define BTN_STYLUS		0x14b
#define BTN_STYLUS2		0x14c
#define BTN_TOOL_DOUBLETAP	0x14d
#define BTN_TOOL_TRIPLETAP	0x14e
#define BTN_TOOL_QUADTAP	0x14f	/* Four fingers on trackpad */

#define BTN_WHEEL		0x150
#define BTN_GEAR_DOWN		0x150
#define BTN_GEAR_UP		0x151

#define KEY_OK			0x160
#define KEY_SELECT		0x161
#define KEY_GOTO		0x162
#define KEY_CLEAR		0x163
#define KEY_POWER2		0x164
#define KEY_OPTION		0x165
#define KEY_INFO		0x166	/* AL OEM Features/Tips/Tutorial */
#define KEY_TIME		0x167
#define KEY_VENDOR		0x168
#define KEY_ARCHIVE		0x169
#define KEY_PROGRAM		0x16a	/* Media Select Program Guide */
#define KEY_CHANNEL		0x16b
#define KEY_FAVORITES		0x16c
#define KEY_EPG			0x16d
#define KEY_PVR			0x16e	/* Media Select Home */
#define KEY_MHP			0x16f
#define KEY_LANGUAGE		0x170
#define KEY_TITLE		0x171
#define KEY_SUBTITLE		0x172
#define KEY_ANGLE		0x173
#define KEY_ZOOM		0x174
#define KEY_MODE		0x175
#define KEY_KEYBOARD		0x176
#define KEY_SCREEN		0x177
#define KEY_PC			0x178	/* Media Select Computer */
#define KEY_TV			0x179	/* Media Select TV */
#define KEY_TV2			0x17a	/* Media Select Cable */
#define KEY_VCR			0x17b	/* Media Select VCR */
#define KEY_VCR2		0x17c	/* VCR Plus */
#define KEY_SAT			0x17d	/* Media Select Satellite */
#define KEY_SAT2		0x17e
#define KEY_CD			0x17f	/* Media Select CD */
#define KEY_TAPE		0x180	/* Media Select Tape */
#define KEY_RADIO		0x181
#define KEY_TUNER		0x182	/* Media Select Tuner */
#define KEY_PLAYER		0x183
#define KEY_TEXT		0x184
#define KEY_DVD			0x185	/* Media Select DVD */
#define KEY_AUX			0x186
#define KEY_MP3			0x187
#define KEY_AUDIO		0x188
#define KEY_VIDEO		0x189
#define KEY_DIRECTORY		0x18a
#define KEY_LIST		0x18b
#define KEY_MEMO		0x18c	/* Media Select Messages */
#define KEY_CALENDAR		0x18d
#define KEY_RED			0x18e
#define KEY_GREEN		0x18f
#define KEY_YELLOW		0x190
#define KEY_BLUE		0x191
#define KEY_CHANNELUP		0x192	/* Channel Increment */
#define KEY_CHANNELDOWN		0x193	/* Channel Decrement */
#define KEY_FIRST		0x194
#define KEY_LAST		0x195	/* Recall Last */
#define KEY_AB			0x196
#define KEY_NEXT		0x197
#define KEY_RESTART		0x198
#define KEY_SLOW		0x199
#define KEY_SHUFFLE		0x19a
#define KEY_BREAK		0x19b
#define KEY_PREVIOUS		0x19c
#define KEY_DIGITS		0x19d
#define KEY_TEEN		0x19e
#define KEY_TWEN		0x19f
#define KEY_VIDEOPHONE		0x1a0	/* Media Select Video Phone */
#define KEY_GAMES		0x1a1	/* Media Select Games */
#define KEY_ZOOMIN		0x1a2	/* AC Zoom In */
#define KEY_ZOOMOUT		0x1a3	/* AC Zoom Out */
#define KEY_ZOOMRESET		0x1a4	/* AC Zoom */
#define KEY_WORDPROCESSOR	0x1a5	/* AL Word Processor */
#define KEY_EDITOR		0x1a6	/* AL Text Editor */
#define KEY_SPREADSHEET		0x1a7	/* AL Spreadsheet */
#define KEY_GRAPHICSEDITOR	0x1a8	/* AL Graphics Editor */
#define KEY_PRESENTATION	0x1a9	/* AL Presentation App */
#define KEY_DATABASE		0x1aa	/* AL Database App */
#define KEY_NEWS		0x1ab	/* AL Newsreader */
#define KEY_VOICEMAIL		0x1ac	/* AL Voicemail */
#define KEY_ADDRESSBOOK		0x1ad	/* AL Contacts/Address Book */
#define KEY_MESSENGER		0x1ae	/* AL Instant Messaging */
#define KEY_DISPLAYTOGGLE	0x1af	/* Turn display (LCD) on and off */
#define KEY_SPELLCHECK		0x1b0   /* AL Spell Check */
#define KEY_LOGOFF		0x1b1   /* AL Logoff */

#define KEY_DOLLAR		0x1b2
#define KEY_EURO		0x1b3

#define KEY_FRAMEBACK		0x1b4	/* Consumer - transport controls */
#define KEY_FRAMEFORWARD	0x1b5
#define KEY_CONTEXT_MENU	0x1b6	/* GenDesc - system context menu */
#define KEY_MEDIA_REPEAT	0x1b7	/* Consumer - transport control */

#define KEY_DEL_EOL		0x1c0
#define KEY_DEL_EOS		0x1c1
#define KEY_INS_LINE		0x1c2
#define KEY_DEL_LINE		0x1c3

#define KEY_FN			0x1d0
#define KEY_FN_ESC		0x1d1
#define KEY_FN_F1		0x1d2
#define KEY_FN_F2		0x1d3
#define KEY_FN_F3		0x1d4
#define KEY_FN_F4		0x1d5
#define KEY_FN_F5		0x1d6
#define KEY_FN_F6		0x1d7
#define KEY_FN_F7		0x1d8
#define KEY_FN_F8		0x1d9
#define KEY_FN_F9		0x1da
#define KEY_FN_F10		0x1db
#define KEY_FN_F11		0x1dc
#define KEY_FN_F12		0x1dd
#define KEY_FN_1		0x1de
#define KEY_FN_2		0x1df
#define KEY_FN_D		0x1e0
#define KEY_FN_E		0x1e1
#define KEY_FN_F		0x1e2
#define KEY_FN_S		0x1e3
#define KEY_FN_B		0x1e4

#define KEY_BRL_DOT1		0x1f1
#define KEY_BRL_DOT2		0x1f2
#define KEY_BRL_DOT3		0x1f3
#define KEY_BRL_DOT4		0x1f4
#define KEY_BRL_DOT5		0x1f5
#define KEY_BRL_DOT6		0x1f6
#define KEY_BRL_DOT7		0x1f7
#define KEY_BRL_DOT8		0x1f8
#define KEY_BRL_DOT9		0x1f9
#define KEY_BRL_DOT10		0x1fa

#define KEY_NUMERIC_0		0x200	/* used by phones, remote controls, */
#define KEY_NUMERIC_1		0x201	/* and other keypads */
#define KEY_NUMERIC_2		0x202
#define KEY_NUMERIC_3		0x203
#define KEY_NUMERIC_4		0x204
#define KEY_NUMERIC_5		0x205
#define KEY_NUMERIC_6		0x206
#define KEY_NUMERIC_7		0x207
#define KEY_NUMERIC_8		0x208
#define KEY_NUMERIC_9		0x209
#define KEY_NUMERIC_STAR	0x20a
#define KEY_NUMERIC_POUND	0x20b

#define KEY_CAMERA_FOCUS	0x210
#define KEY_WPS_BUTTON		0x211	/* WiFi Protected Setup key */

#define BTN_TRIGGER_HAPPY		0x2c0
#define BTN_TRIGGER_HAPPY1		0x2c0
#define BTN_TRIGGER_HAPPY2		0x2c1
#define BTN_TRIGGER_HAPPY3		0x2c2
#define BTN_TRIGGER_HAPPY4		0x2c3
#define BTN_TRIGGER_HAPPY5		0x2c4
#define BTN_TRIGGER_HAPPY6		0x2c5
#define BTN_TRIGGER_HAPPY7		0x2c6
#define BTN_TRIGGER_HAPPY8		0x2c7
#define BTN_TRIGGER_HAPPY9		0x2c8
#define BTN_TRIGGER_HAPPY10		0x2c9
#define BTN_TRIGGER_HAPPY11		0x2ca
#define BTN_TRIGGER_HAPPY12		0x2cb
#define BTN_TRIGGER_HAPPY13		0x2cc
#define BTN_TRIGGER_HAPPY14		0x2cd
#define BTN_TRIGGER_HAPPY15		0x2ce
#define BTN_TRIGGER_HAPPY16		0x2cf
#define BTN_TRIGGER_HAPPY17		0x2d0
#define BTN_TRIGGER_HAPPY18		0x2d1
#define BTN_TRIGGER_HAPPY19		0x2d2
#define BTN_TRIGGER_HAPPY20		0x2d3
#define BTN_TRIGGER_HAPPY21		0x2d4
#define BTN_TRIGGER_HAPPY22		0x2d5
#define BTN_TRIGGER_HAPPY23		0x2d6
#define BTN_TRIGGER_HAPPY24		0x2d7
#define BTN_TRIGGER_HAPPY25		0x2d8
#define BTN_TRIGGER_HAPPY26		0x2d9
#define BTN_TRIGGER_HAPPY27		0x2da
#define BTN_TRIGGER_HAPPY28		0x2db
#define BTN_TRIGGER_HAPPY29		0x2dc
#define BTN_TRIGGER_HAPPY30		0x2dd
#define BTN_TRIGGER_HAPPY31		0x2de
#define BTN_TRIGGER_HAPPY32		0x2df
#define BTN_TRIGGER_HAPPY33		0x2e0
#define BTN_TRIGGER_HAPPY34		0x2e1
#define BTN_TRIGGER_HAPPY35		0x2e2
#define BTN_TRIGGER_HAPPY36		0x2e3
#define BTN_TRIGGER_HAPPY37		0x2e4
#define BTN_TRIGGER_HAPPY38		0x2e5
#define BTN_TRIGGER_HAPPY39		0x2e6
#define BTN_TRIGGER_HAPPY40		0x2e7

/* We avoid low common keys in module aliases so they don't get huge. */
#define KEY_MIN_INTERESTING	KEY_MUTE
#define KEY_MAX			0x2ff
#define KEY_CNT			(KEY_MAX+1)

 

/*
 * Relative axes    相对位置类(主要是用于鼠标和笔记本电脑的触控板)
 */       

#define REL_X			0x00            /* x轴相对上次的x轴的偏移坐标 */
#define REL_Y			0x01            /* y轴相对上次的y轴的偏移坐标 */
#define REL_Z			0x02            /* z轴相对上次的z轴的偏移坐标 */
#define REL_RX			0x03            /* 其它用到了再学,我用到了再补充这个博客 */
#define REL_RY			0x04
#define REL_RZ			0x05
#define REL_HWHEEL		0x06
#define REL_DIAL		0x07
#define REL_WHEEL		0x08
#define REL_MISC		0x09
#define REL_MAX			0x0f
#define REL_CNT			(REL_MAX+1)

/*
 * Absolute axes        /* 绝对坐标(主要是用于触摸屏和写字板类设备) */
 */

#define ABS_X			0x00
#define ABS_Y			0x01
#define ABS_Z			0x02
#define ABS_RX			0x03
#define ABS_RY			0x04
#define ABS_RZ			0x05
#define ABS_THROTTLE		0x06
#define ABS_RUDDER		0x07
#define ABS_WHEEL		0x08
#define ABS_GAS			0x09
#define ABS_BRAKE		0x0a
#define ABS_HAT0X		0x10
#define ABS_HAT0Y		0x11
#define ABS_HAT1X		0x12
#define ABS_HAT1Y		0x13
#define ABS_HAT2X		0x14
#define ABS_HAT2Y		0x15
#define ABS_HAT3X		0x16
#define ABS_HAT3Y		0x17
#define ABS_PRESSURE		0x18
#define ABS_DISTANCE		0x19
#define ABS_TILT_X		0x1a
#define ABS_TILT_Y		0x1b
#define ABS_TOOL_WIDTH		0x1c
#define ABS_VOLUME		0x20
#define ABS_MISC		0x28
/* 因为触摸类设备现在用的越来越多,所以专门在绝对坐标里做了触摸设备的参数描述信息 */
#define ABS_MT_TOUCH_MAJOR	0x30	/* Major axis of touching ellipse */
#define ABS_MT_TOUCH_MINOR	0x31	/* Minor axis (omit if circular) */
#define ABS_MT_WIDTH_MAJOR	0x32	/* Major axis of approaching ellipse */
#define ABS_MT_WIDTH_MINOR	0x33	/* Minor axis (omit if circular) */
#define ABS_MT_ORIENTATION	0x34	/* Ellipse orientation */
#define ABS_MT_POSITION_X	0x35	/* Center X ellipse position */
#define ABS_MT_POSITION_Y	0x36	/* Center Y ellipse position */
#define ABS_MT_TOOL_TYPE	0x37	/* Type of touching device */
#define ABS_MT_BLOB_ID		0x38	/* Group a set of packets as a blob */
#define ABS_MT_TRACKING_ID	0x39	/* Unique ID of initiated contact */
#define ABS_MT_PRESSURE		0x3a	/* Pressure on contact area */

#define ABS_MAX			0x3f
#define ABS_CNT			(ABS_MAX+1)

其它的用的不多,用到了再来学习

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