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LinuxµÄInput Device

      Linux µÄ Input Device ÊÇÖØÒªµÄÒ»個 subsystem£¬ÔÚ進ÐÐ實Àý½é紹Ç°£¬ÏÈ´óÂÔÁ˽âÒ»ÏÂÏà關µÄ API¡£input.cÊÇLinuxµÄÊäÈë驅動³Ìʽ£¬Ö÷ÒªÖ§Ô®鍵盤與»¬ÊóµÄ輸È룻input.c½éÃæÌØÊâµÄµØ·½ÊÇ採ÓÃÁËʼþ£¨event£©µÄ·½Ê½來處Àí輸È룬ÒÔÏÂÊÇinput.c½éÃæÖØÒªµÄ資ÁÏ結構與º¯數£º
* struct input_dev
* void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
* void input_register_device(struct input_dev *);
* void input_unregister_device(struct input_dev *);
* void input_register_handler(struct input_handler *);
* void input_unregister_handler(struct input_handler *);
£¨1£© struct input_devÊÇÓÃ來ÃèÊö輸ÈëʼþµÄÖØÒª資ÁÏ結構£¬ÆäÔ­ÐÍÈçÏ£º
struct input_dev {
 const char *name;
 const char *phys;
 const char *uniq;
 struct input_id id;
 unsigned long evbit[BITS_TO_LONGS(EV_CNT)];
 unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
 unsigned long relbit[BITS_TO_LONGS(REL_CNT)];
 unsigned long absbit[BITS_TO_LONGS(ABS_CNT)];
 unsigned long mscbit[BITS_TO_LONGS(MSC_CNT)];
 unsigned long ledbit[BITS_TO_LONGS(LED_CNT)];
 unsigned long sndbit[BITS_TO_LONGS(SND_CNT)];
 unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
 unsigned long swbit[BITS_TO_LONGS(SW_CNT)];
 unsigned int keycodemax;
 unsigned int keycodesize;
 void *keycode;
 int (*setkeycode)(struct input_dev *dev, int scancode, int keycode);
 int (*getkeycode)(struct input_dev *dev, int scancode, int *keycode);
 struct ff_device *ff;
 unsigned int repeat_key;
 struct timer_list timer;
 int sync;
 int abs[ABS_MAX + 1];
 int rep[REP_MAX + 1];
 unsigned long key[BITS_TO_LONGS(KEY_CNT)];
 unsigned long led[BITS_TO_LONGS(LED_CNT)];
 unsigned long snd[BITS_TO_LONGS(SND_CNT)];
 u


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