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Firefly_RK3399
kernel_drivers_examples/input_event.md
zeroway 169d1c715d Input event debug work flow
2019-07-25 17:35:12 +08:00

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使用evtest来查看输入设备和输入事件

For example, on the sapphire-excavator-board(buildroot)

[root@rk3399:/]# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:      gsl3673
/dev/input/event1:      adc-keys
/dev/input/event2:      gpio-keys
Select the device event number [0-2]: 1
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "adc-keys"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
	Event code 1 (KEY_ESC)
	Event code 114 (KEY_VOLUMEDOWN)
	Event code 115 (KEY_VOLUMEUP)
	Event code 139 (KEY_MENU)
	Event code 158 (KEY_BACK)
Properties:
Testing ... (interrupt to exit)
Event: time 1358512388.027673, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 1
Event: time 1358512388.027673, -------------- SYN_REPORT ------------
Event: time 1358512388.127788, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 0
Event: time 1358512388.127788, -------------- SYN_REPORT ------------