1.查看/dev/input/eventX是什么類型的事件

root@NanoPi2:~# cat /proc/bus/input/devices I: Bus=0003 Vendor=062a Product=4182 Version=0110 N: Name="MOSART Semi. 2.4G Keyboard Mouse" P: Phys=usb-nxp-ehci-1.2.2/input0 S: Sysfs=/devices/platform/nxp-ehci/usb1/1-1/1-1.2/1-1.2.2/1-1.2.2:1.0/input/input3 U: Uniq= H: Handlers=sysrq kbd event3 B: PROP=0 B: EV=120013 B: KEY=10000 7 ff9f207a c14057ff febeffdf ffefffff ffffffff fffffffe B: MSC=10 B: LED=7 I: Bus=0003 Vendor=062a Product=4182 Version=0110 N: Name="MOSART Semi. 2.4G Keyboard Mouse" P: Phys=usb-nxp-ehci-1.2.2/input1 S: Sysfs=/devices/platform/nxp-ehci/usb1/1-1/1-1.2/1-1.2.2/1-1.2.2:1.1/input/input4 U: Uniq= H: Handlers=kbd mouse1 event4 B: PROP=0 B: EV=1f B: KEY=4837fff 72ff32d bf544446 0 0 1f0001 20f90 8b17c000 677bfa d941dfed 9ed680 4400 0 10000002 B: REL=1c3 B: ABS=1f01 0 B: MSC=10

查詢結果是鍵盤句柄：kbd event3 鼠標句柄：kbd mouse1 event4
設備有著自己特殊的按鍵鍵碼，我需要將一些標準的按鍵，比如0－9，X－Z等模擬成標準按鍵，比如KEY_0,KEY-Z等，所以需要用到按鍵模擬，具體 方法就是操作/dev/input/event1文件，向它寫入個input_event結構體就可以模擬按鍵的輸入了。
linux/input.h中有定義，這個文件還定義了標準按鍵的編碼等

struct input_event { struct timeval time; //按鍵時間 __u16 type; //類型，在下面有定義 __u16 code; //要模擬成什么按鍵 __s32 value;//是按下還是釋放 };

code：
事件的代碼.如果事件的類型代碼是EV_KEY,該代碼code為設備鍵盤代碼.代碼植0~127為鍵盤上的按鍵代碼,0x110~0x116 為鼠標上按鍵代碼,其中0x110(BTN_ LEFT)為鼠標左鍵,0x111(BTN_RIGHT)為鼠標右鍵,0x112(BTN_ MIDDLE)為鼠標中鍵.其它代碼含義請參看include/linux/input.h文件. 如果事件的類型代碼是EV_REL,code值表示軌跡的類型.如指示鼠標的X軸方向REL_X(代碼為0x00),指示鼠標的Y軸方向REL_Y(代碼 為0x01),指示鼠標中輪子方向REL_WHEEL(代碼為0x08).
type:
EV_KEY,鍵盤
EV_REL,相對坐標
EV_ABS,絕對坐標
value：
事件的值.如果事件的類型代碼是EV_KEY,當按鍵按下時值為1,松開時值為0;如果事件的類型代碼是EV_ REL,value的正數值和負數值分別代表兩個不同方向的值.

/* * Event types */ #define EV_SYN 0x00 #define EV_KEY 0x01 //按鍵 #define EV_REL 0x02 //相對坐標(軌跡球) #define EV_ABS 0x03 //絕對坐標 #define EV_MSC 0x04 //其他 #define EV_SW 0x05 #define EV_LED 0x11 //LED #define EV_SND 0x12//聲音 #define EV_REP 0x14//repeat #define EV_FF 0x15 #define EV_PWR 0x16 #define EV_FF_STATUS 0x17 #define EV_MAX 0x1f #define EV_CNT (EV_MAX+1)

2.模擬按鍵輸入
//其中0表示釋放，1按鍵按下，2表示一直按下
//0 for EV_KEY for release, 1 for keypress and 2 for autorepeat.

void simulate_key(int fd,int value) { struct input_event event; event.type = EV_KEY; //event.code = KEY_0;//要模擬成什么按鍵 event.value = value;//是按下還是釋放按鍵或者重復 gettimeofday(&event.time,0); if(write(fd,&event,sizeof(event)) < 0){ dprintk("simulate key error~~~\n"); return ; } }

3.模擬鼠標輸入（軌跡球）

void simulate_mouse(int fd,char buf[4]) { int rel_x,rel_y; static struct input_event event,ev; //buf[0],buf[2],小于0則為左移，大于0則為右移 //buf[1],buf[3],小于0則為下移，大于0則為上移 dprintk("MOUSE TOUCH: x1=%d,y1=%d,x2=%d,y2=%d\n",buf[0],buf[1],buf[2],buf[3]); rel_x = (buf[0] + buf[2]) /2; rel_y = -(buf[1] + buf[3]) /2; //和我們的鼠標是相反的方向，所以取反 event.type = EV_REL; event.code = REL_X; event.value = rel_x; gettimeofday(&event.time,0); if( write(fd,&event,sizeof(event))!=sizeof(event)) dprintk("rel_x error~~~:%s\n",strerror(errno)); event.code = REL_Y; event.value = rel_y; gettimeofday(&event.time,0); if( write(fd,&event,sizeof(event))!=sizeof(event)) dprintk("rel_y error~~~:%s\n",strerror(errno)); //一定要刷新空的 write(fd,&ev,sizeof(ev)); }

4.鼠標和鍵盤文件打開方法：

int fd_kbd; // /dev/input/event1 int fd_mouse; //dev/input/mouse2 fd_kbd = open("/dev/input/event1",O_RDWR); if(fd_kbd<=0){ printf("error open keyboard:%s\n",strerror(errno)); return -1; } fd_mouse = open("/dev/input/event3",O_RDWR); //如果不行的話，那試試/dev/input/mice if(fd_mouse<=0){ printf("error open mouse:%s\n",strerror(errno)); return -2; } }

5.例子

#include <string.h> #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <linux/input.h> #include <linux/uinput.h> #include <stdio.h> #include <sys/time.h> #include <sys/types.h> #include <unistd.h> void simulate_key(int fd,int kval) { struct input_event event; event.type = EV_KEY; event.value = 1; event.code = kval; gettimeofday(&event.time,0); write(fd,&event,sizeof(event)) ; event.type = EV_SYN; event.code = SYN_REPORT; event.value = 0; write(fd, &event, sizeof(event)); memset(&event, 0, sizeof(event)); gettimeofday(&event.time, NULL); event.type = EV_KEY; event.code = kval; event.value = 0; write(fd, &event, sizeof(event)); event.type = EV_SYN; event.code = SYN_REPORT; event.value = 0; write(fd, &event, sizeof(event)); } void simulate_mouse(int fd) { struct input_event event; memset(&event, 0, sizeof(event)); gettimeofday(&event.time, NULL); event.type = EV_REL; event.code = REL_X; event.value = 10; write(fd, &event, sizeof(event)); event.type = EV_REL; event.code = REL_Y; event.value = 10; write(fd, &event, sizeof(event)); event.type = EV_SYN; event.code = SYN_REPORT; event.value = 0; write(fd, &event, sizeof(event)); } int main() { int fd_kbd; int fd_mouse; fd_kbd = open("/dev/input/event1",O_RDWR); if(fd_kbd<=0){ printf("error open keyboard:\n"); return -1; } fd_mouse = open("/dev/input/event2",O_RDWR); if(fd_mouse<=0){ printf("error open mouse\n"); return -2; } int i = 0; for(i=0; i< 10; i++) { simulate_key(fd_kbd, KEY_A + i); simulate_mouse(fd_mouse); sleep(1); } close(fd_kbd); }

6.模擬多個按鍵

void simulate_ctrl_space(int fd) { struct input_event event; //先發送一個 CTRL 按下去的事件。 event.type = EV_KEY; event.value = 1; event.code = KEY_LEFTCTRL; gettimeofday(&event.time,0); write(fd,&event,sizeof(event)) ; event.type = EV_SYN; event.code = SYN_REPORT; event.value = 0; write(fd, &event, sizeof(event)); //先發送一個 SPACE 按下去的事件。 event.type = EV_KEY; event.value = 1; event.code = KEY_SPACE; gettimeofday(&event.time,0); write(fd,&event,sizeof(event)) ; //發送一個 釋放 SPACE 的事件 memset(&event, 0, sizeof(event)); gettimeofday(&event.time, NULL); event.type = EV_KEY; event.code = KEY_SPACE; event.value = 0; write(fd, &event, sizeof(event)); event.type = EV_SYN; event.code = SYN_REPORT; event.value = 0; write(fd, &event, sizeof(event)); //發送一個 釋放 CTRL 的事件 memset(&event, 0, sizeof(event)); gettimeofday(&event.time, NULL); event.type = EV_KEY; event.code = KEY_LEFTCTRL; event.value = 0; write(fd, &event, sizeof(event)); event.type = EV_SYN; event.code = SYN_REPORT; event.value = 0; write(fd, &event, sizeof(event)); }

6.附input.h中key定義

213 #define KEY_RESERVED 0 214 #define KEY_ESC 1 215 #define KEY_1 2 216 #define KEY_2 3 217 #define KEY_3 4 218 #define KEY_4 5 219 #define KEY_5 6 220 #define KEY_6 7 221 #define KEY_7 8 222 #define KEY_8 9 223 #define KEY_9 10 224 #define KEY_0 11 225 #define KEY_MINUS 12 226 #define KEY_EQUAL 13 227 #define KEY_BACKSPACE 14 228 #define KEY_TAB 15 229 #define KEY_Q 16 230 #define KEY_W 17 231 #define KEY_E 18 232 #define KEY_R 19 233 #define KEY_T 20 234 #define KEY_Y 21 235 #define KEY_U 22 236 #define KEY_I 23 237 #define KEY_O 24 238 #define KEY_P 25 239 #define KEY_LEFTBRACE 26 240 #define KEY_RIGHTBRACE 27 241 #define KEY_ENTER 28 242 #define KEY_LEFTCTRL 29 243 #define KEY_A 30 244 #define KEY_S 31 245 #define KEY_D 32 246 #define KEY_F 33 247 #define KEY_G 34 248 #define KEY_H 35 249 #define KEY_J 36 250 #define KEY_K 37 251 #define KEY_L 38 252 #define KEY_SEMICOLON 39 253 #define KEY_APOSTROPHE 40 254 #define KEY_GRAVE 41 255 #define KEY_LEFTSHIFT 42 256 #define KEY_BACKSLASH 43 257 #define KEY_Z 44 258 #define KEY_X 45 259 #define KEY_C 46 260 #define KEY_V 47 261 #define KEY_B 48 262 #define KEY_N 49 263 #define KEY_M 50 264 #define KEY_COMMA 51 265 #define KEY_DOT 52 266 #define KEY_SLASH 53 267 #define KEY_RIGHTSHIFT 54 268 #define KEY_KPASTERISK 55 269 #define KEY_LEFTALT 56 270 #define KEY_SPACE 57 271 #define KEY_CAPSLOCK 58 272 #define KEY_F1 59 273 #define KEY_F2 60 274 #define KEY_F3 61 275 #define KEY_F4 62 276 #define KEY_F5 63 277 #define KEY_F6 64 278 #define KEY_F7 65 279 #define KEY_F8 66 280 #define KEY_F9 67 281 #define KEY_F10 68 282 #define KEY_NUMLOCK 69 283 #define KEY_SCROLLLOCK 70 284 #define KEY_KP7 71 285 #define KEY_KP8 72 286 #define KEY_KP9 73 287 #define KEY_KPMINUS 74 288 #define KEY_KP4 75 289 #define KEY_KP5 76 290 #define KEY_KP6 77 291 #define KEY_KPPLUS 78 292 #define KEY_KP1 79 293 #define KEY_KP2 80 294 #define KEY_KP3 81 295 #define KEY_KP0 82 296 #define KEY_KPDOT 83 297 298 #define KEY_ZENKAKUHANKAKU 85 299 #define KEY_102ND 86 300 #define KEY_F11 87 301 #define KEY_F12 88 302 #define KEY_RO 89 303 #define KEY_KATAKANA 90 304 #define KEY_HIRAGANA 91 305 #define KEY_HENKAN 92 306 #define KEY_KATAKANAHIRAGANA 93 307 #define KEY_MUHENKAN 94 308 #define KEY_KPJPCOMMA 95 309 #define KEY_KPENTER 96 310 #define KEY_RIGHTCTRL 97 311 #define KEY_KPSLASH 98 312 #define KEY_SYSRQ 99 313 #define KEY_RIGHTALT 100 314 #define KEY_LINEFEED 101 315 #define KEY_HOME 102 316 #define KEY_UP 103 317 #define KEY_PAGEUP 104 318 #define KEY_LEFT 105 319 #define KEY_RIGHT 106 320 #define KEY_END 107 321 #define KEY_DOWN 108 322 #define KEY_PAGEDOWN 109 323 #define KEY_INSERT 110 324 #define KEY_DELETE 111 325 #define KEY_MACRO 112 326 #define KEY_MUTE 113 327 #define KEY_VOLUMEDOWN 114 328 #define KEY_VOLUMEUP 115 329 #define KEY_POWER 116 /* SC System Power Down */ 330 #define KEY_KPEQUAL 117 331 #define KEY_KPPLUSMINUS 118 332 #define KEY_PAUSE 119 333 #define KEY_SCALE 120 /* AL Compiz Scale (Expose) */ 334 335 #define KEY_KPCOMMA 121 336 #define KEY_HANGEUL 122 337 #define KEY_HANGUEL KEY_HANGEUL 338 #define KEY_HANJA 123 339 #define KEY_YEN 124 340 #define KEY_LEFTMETA 125 341 #define KEY_RIGHTMETA 126 342 #define KEY_COMPOSE 127 343 344 #define KEY_STOP 128 /* AC Stop */ 345 #define KEY_AGAIN 129 346 #define KEY_PROPS 130 /* AC Properties */ 347 #define KEY_UNDO 131 /* AC Undo */ 348 #define KEY_FRONT 132 349 #define KEY_COPY 133 /* AC Copy */ 350 #define KEY_OPEN 134 /* AC Open */ 351 #define KEY_PASTE 135 /* AC Paste */ 352 #define KEY_FIND 136 /* AC Search */ 353 #define KEY_CUT 137 /* AC Cut */ 354 #define KEY_HELP 138 /* AL Integrated Help Center */ 355 #define KEY_MENU 139 /* Menu (show menu) */ 356 #define KEY_CALC 140 /* AL Calculator */ 357 #define KEY_SETUP 141 358 #define KEY_SLEEP 142 /* SC System Sleep */ 359 #define KEY_WAKEUP 143 /* System Wake Up */ 360 #define KEY_FILE 144 /* AL Local Machine Browser */ 361 #define KEY_SENDFILE 145 362 #define KEY_DELETEFILE 146 363 #define KEY_XFER 147 364 #define KEY_PROG1 148 365 #define KEY_PROG2 149 366 #define KEY_WWW 150 /* AL Internet Browser */ 367 #define KEY_MSDOS 151 368 #define KEY_COFFEE 152 /* AL Terminal Lock/Screensaver */ 369 #define KEY_SCREENLOCK KEY_COFFEE 370 #define KEY_DIRECTION 153 371 #define KEY_CYCLEWINDOWS 154 372 #define KEY_MAIL 155 373 #define KEY_BOOKMARKS 156 /* AC Bookmarks */ 374 #define KEY_COMPUTER 157 375 #define KEY_BACK 158 /* AC Back */ 376 #define KEY_FORWARD 159 /* AC Forward */ 377 #define KEY_CLOSECD 160 378 #define KEY_EJECTCD 161 379 #define KEY_EJECTCLOSECD 162 380 #define KEY_NEXTSONG 163 381 #define KEY_PLAYPAUSE 164 382 #define KEY_PREVIOUSSONG 165 383 #define KEY_STOPCD 166 384 #define KEY_RECORD 167 385 #define KEY_REWIND 168 386 #define KEY_PHONE 169 /* Media Select Telephone */ 387 #define KEY_ISO 170 388 #define KEY_CONFIG 171 /* AL Consumer Control Configuration */ 389 #define KEY_HOMEPAGE 172 /* AC Home */ 390 #define KEY_REFRESH 173 /* AC Refresh */ 391 #define KEY_EXIT 174 /* AC Exit */ 392 #define KEY_MOVE 175 393 #define KEY_EDIT 176 394 #define KEY_SCROLLUP 177 395 #define KEY_SCROLLDOWN 178 396 #define KEY_KPLEFTPAREN 179 397 #define KEY_KPRIGHTPAREN 180 398 #define KEY_NEW 181 /* AC New */ 399 #define KEY_REDO 182 /* AC Redo/Repeat */ 400 401 #define KEY_F13 183 402 #define KEY_F14 184 403 #define KEY_F15 185 404 #define KEY_F16 186 405 #define KEY_F17 187 406 #define KEY_F18 188 407 #define KEY_F19 189 408 #define KEY_F20 190 409 #define KEY_F21 191 410 #define KEY_F22 192 411 #define KEY_F23 193 412 #define KEY_F24 194 413 414 #define KEY_PLAYCD 200 415 #define KEY_PAUSECD 201 416 #define KEY_PROG3 202 417 #define KEY_PROG4 203 418 #define KEY_DASHBOARD 204 /* AL Dashboard */ 419 #define KEY_SUSPEND 205 420 #define KEY_CLOSE 206 /* AC Close */ 421 #define KEY_PLAY 207 422 #define KEY_FASTFORWARD 208 423 #define KEY_BASSBOOST 209 424 #define KEY_PRINT 210 /* AC Print */ 425 #define KEY_HP 211 426 #define KEY_CAMERA 212 427 #define KEY_SOUND 213 428 #define KEY_QUESTION 214 429 #define KEY_EMAIL 215 430 #define KEY_CHAT 216 431 #define KEY_SEARCH 217 432 #define KEY_CONNECT 218 433 #define KEY_FINANCE 219 /* AL Checkbook/Finance */ 434 #define KEY_SPORT 220 435 #define KEY_SHOP 221 436 #define KEY_ALTERASE 222 437 #define KEY_CANCEL 223 /* AC Cancel */ 438 #define KEY_BRIGHTNESSDOWN 224 439 #define KEY_BRIGHTNESSUP 225 440 #define KEY_MEDIA 226 441 442 #define KEY_SWITCHVIDEOMODE 227 /* Cycle between available video 443 outputs (Monitor/LCD/TV-out/etc) */ 444 #define KEY_KBDILLUMTOGGLE 228 445 #define KEY_KBDILLUMDOWN 229 446 #define KEY_KBDILLUMUP 230 447 448 #define KEY_SEND 231 /* AC Send */ 449 #define KEY_REPLY 232 /* AC Reply */ 450 #define KEY_FORWARDMAIL 233 /* AC Forward Msg */ 451 #define KEY_SAVE 234 /* AC Save */ 452 #define KEY_DOCUMENTS 235 453 454 #define KEY_BATTERY 236 455 456 #define KEY_BLUETOOTH 237 457 #define KEY_WLAN 238 458 #define KEY_UWB 239 459 460 #define KEY_UNKNOWN 240 461 462 #define KEY_VIDEO_NEXT 241 /* drive next video source */ 463 #define KEY_VIDEO_PREV 242 /* drive previous video source */ 464 #define KEY_BRIGHTNESS_CYCLE 243 /* brightness up, after max is min */ 465 #define KEY_BRIGHTNESS_AUTO 244 /* Set Auto Brightness: manual 466 brightness control is off, 467 rely on ambient */ 468 #define KEY_BRIGHTNESS_ZERO KEY_BRIGHTNESS_AUTO #define KEY_DISPLAY_OFF 245 /* display device to off state */ #define KEY_WWAN 246 /* Wireless WAN (LTE, UMTS, GSM, etc.) */ #define KEY_WIMAX KEY_WWAN #define KEY_RFKILL 247 /* Key that controls all radios */ #define KEY_MICMUTE 248 /* Mute / unmute the microphone */

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