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Linux/イベント処理

Linux/イベント

Top / Linux / イベント

kernel.org/doc/Documentation/input/event-codes.txt

input_event

• イベントを表す構造体。

  struct input_event {
          struct timeval time;
          __u16 type;
          __u16 code;
          __s32 value;
  };

• type,codeはlinux/input.hで定義されている

type,code

• type:
  • EV_～
• code:
  • SYN_～ - Synchronization events.
  • KEY_～ - Keys
  • BTN_～ - Buttons
  • REL_～ - Relative axes
  • ABS_～ - Absolute axes
  • SW_?～ - Switch events
  • MSC_?～ - Misc events
  • LED_?～ - LEDs
  • REP_?～ - Autorepeat values
  • SND_?～ - Sounds

EV_SYN

• Used as markers to separate events. Events may be separated in time or in space, such as with the multitouch protocol.
  • SYN_REPORT?
  • SYN_CONFIG?
  • SYN_MT_REPORT
  • SYN_DROPPED?

EV_KEY

• Used to describe state changes of keyboards, buttons, or other key-like devices.
  • BTN_TOOL_<name>
  • BTN_TOUCH
  • BTN_TOOL_FINGER?
  • BTN_TOOL_DOUBLETAP?
  • BTN_TOOL_TRIPLETAP?
  • BTN_TOOL_QUADTAP?

EV_REL

• Used to describe relative axis value changes, e.g. moving the mouse 5 units to the left.
  • REL_WHEEL?
  • REL_HWHEEL?

EV_ABS

• Used to describe absolute axis value changes, e.g. describing the coordinates of a touch on a touchscreen.
  • ABS_DISTANCE?
  • ABS_MT_<name> - Linux/マルチタッチ/イベント

EV_MSC?

• Used to describe miscellaneous input data that do not fit into other types.

EV_SW?

• Used to describe binary state input switches.

EV_LED?

• Used to turn LEDs on devices on and off.

EV_SND?

• Used to output sound to devices.

EV_REP

• Used for autorepeating devices.

EV_FF?

• Used to send force feedback commands to an input device.

EV_PWR?

• A special type for power button and switch input.

EV_FF_STATUS?

• Used to receive force feedback device status.

Linux/マルチタッチ

• Linux/マルチタッチ/イベント

参考

• http://lxr.free-electrons.com/source/include/linux/input.h