우분투 기준 /usr/include/linux/joystick.h 에 존재함.
#ifndef _LINUX_JOYSTICK_H #define _LINUX_JOYSTICK_H /* * Copyright (C) 1996-2000 Vojtech Pavlik * * Sponsored by SuSE */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Should you need to contact me, the author, you can do so either by * e-mail - mail your message to vojtech@suse.cz, or by paper mail: * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic */ #include "linux/types.h" #include "linux/input.h" /* * Version */ #define JS_VERSION 0x020100 /* * Types and constants for reading from /dev/js */ #define JS_EVENT_BUTTON 0x01 /* button pressed/released */ #define JS_EVENT_AXIS 0x02 /* joystick moved */ #define JS_EVENT_INIT 0x80 /* initial state of device */ struct js_event { __u32 time; /* event timestamp in milliseconds */ __s16 value; /* value */ __u8 type; /* event type */ __u8 number; /* axis/button number */ }; /* * IOCTL commands for joystick driver */ #define JSIOCGVERSION _IOR('j', 0x01, __u32) /* get driver version */ #define JSIOCGAXES _IOR('j', 0x11, __u8) /* get number of axes */ #define JSIOCGBUTTONS _IOR('j', 0x12, __u8) /* get number of buttons */ #define JSIOCGNAME(len) _IOC(_IOC_READ, 'j', 0x13, len) /* get identifier string */ #define JSIOCSCORR _IOW('j', 0x21, struct js_corr) /* set correction values */ #define JSIOCGCORR _IOR('j', 0x22, struct js_corr) /* get correction values */ #define JSIOCSAXMAP _IOW('j', 0x31, __u8[ABS_MAX + 1]) /* set axis mapping */ #define JSIOCGAXMAP _IOR('j', 0x32, __u8[ABS_MAX + 1]) /* get axis mapping */ #define JSIOCSBTNMAP _IOW('j', 0x33, __u16[KEY_MAX - BTN_MISC + 1]) /* set button mapping */ #define JSIOCGBTNMAP _IOR('j', 0x34, __u16[KEY_MAX - BTN_MISC + 1]) /* get button mapping */ /* * Types and constants for get/set correction */ #define JS_CORR_NONE 0x00 /* returns raw values */ #define JS_CORR_BROKEN 0x01 /* broken line */ struct js_corr { __s32 coef[8]; __s16 prec; __u16 type; }; /* * v0.x compatibility definitions */ #define JS_RETURN sizeof(struct JS_DATA_TYPE) #define JS_TRUE 1 #define JS_FALSE 0 #define JS_X_0 0x01 #define JS_Y_0 0x02 #define JS_X_1 0x04 #define JS_Y_1 0x08 #define JS_MAX 2 #define JS_DEF_TIMEOUT 0x1300 #define JS_DEF_CORR 0 #define JS_DEF_TIMELIMIT 10L #define JS_SET_CAL 1 #define JS_GET_CAL 2 #define JS_SET_TIMEOUT 3 #define JS_GET_TIMEOUT 4 #define JS_SET_TIMELIMIT 5 #define JS_GET_TIMELIMIT 6 #define JS_GET_ALL 7 #define JS_SET_ALL 8 struct JS_DATA_TYPE { __s32 buttons; __s32 x; __s32 y; }; struct JS_DATA_SAVE_TYPE_32 { __s32 JS_TIMEOUT; __s32 BUSY; __s32 JS_EXPIRETIME; __s32 JS_TIMELIMIT; struct JS_DATA_TYPE JS_SAVE; struct JS_DATA_TYPE JS_CORR; }; struct JS_DATA_SAVE_TYPE_64 { __s32 JS_TIMEOUT; __s32 BUSY; __s64 JS_EXPIRETIME; __s64 JS_TIMELIMIT; struct JS_DATA_TYPE JS_SAVE; struct JS_DATA_TYPE JS_CORR; }; #endif /* _LINUX_JOYSTICK_H */
실험적으로 소스를 짜서 해보니
버튼은 type 1
value는 0(눌리지 않음) 1(눌림)
number는 버튼 번호(1번 버튼은 0번 부터 시작)
X/Y/Z 축은 type 2
좌우는 number 0
앞뒤는 number 1
쓰로틀은 number 2
러더는 number 3
햇좌우 number 5
햇앞뒤 number 6
값이 변하기 전에는 새로운 값은 읽히지 않는 듯 하고,
그런 이유로 예제 파일이 멀티쓰레드로 구성이 된 것으로 생각된다.
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