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Input getevent记录和InputReader，InputDispatcher启动

news 2025/11/4 9:19:22

getevent驱动事件读取

在系统中可以通过getevent获取系统的事件，包括屏幕点击事件，按键事件等

k63v1us_64_bsp:/ $ getevent
add device 1: /dev/input/event2name:     "aw9106-key"
add device 2: /dev/input/event1name:     "mtk-kpd"
add device 3: /dev/input/event3name:     "mtk-tpd"
add device 4: /dev/input/event0name:     "ACCDET"
/dev/input/event3: 0003 0030 00000033
/dev/input/event3: 0003 0039 00000000
/dev/input/event3: 0001 014a 00000001
/dev/input/event3: 0003 0035 00000159
/dev/input/event3: 0003 0036 00000379
/dev/input/event3: 0000 0002 00000000
/dev/input/event3: 0000 0000 00000000

可以看到在触摸或者点击的时候会获取驱动反馈上来的事件。

我们通过getevent -h看看这个具体的含义

emini:/ $ getevent -h
Usage: getevent [-t] [-n] [-s switchmask] [-S] [-v [mask]] [-d] [-p] [-i] [-l] [-q] [-c count] [-r] [device]-t: show time stamps-n: don't print newlines-s: print switch states for given bits-S: print all switch states-v: verbosity mask (errs=1, dev=2, name=4, info=8, vers=16, pos. events=32, props=64)-d: show HID descriptor, if available-p: show possible events (errs, dev, name, pos. events)-i: show all device info and possible events-l: label event types and names in plain text-q: quiet (clear verbosity mask)-c: print given number of events then exit-r: print rate events are received

-t: show time stamps --显示事件的发生时间
-l: label event types and names in plain text —这里表示要把event事件类型名字打印出来
-r: print rate events are received --显示一下接受事件速率

130|k63v1us_64_bsp:/ $ getevent -lrt                                                                                                   
add device 1: /dev/input/event2name:     "aw9106-key"
add device 2: /dev/input/event1name:     "mtk-kpd"
add device 3: /dev/input/event3name:     "mtk-tpd"
add device 4: /dev/input/event0name:     "ACCDET"
[  166018.395946] /dev/input/event1: EV_KEY       KEY_POWER            DOWN                
[  166018.395946] /dev/input/event1: EV_SYN       SYN_REPORT           00000000            
[  166018.506548] /dev/input/event1: EV_KEY       KEY_POWER            UP                  
[  166018.506548] /dev/input/event1: EV_SYN       SYN_REPORT           00000000             rate 9
[  166021.499033] /dev/input/event2: EV_KEY       0258                 DOWN                
[  166021.499033] /dev/input/event2: EV_SYN       SYN_REPORT           00000000             rate 0
[  166021.612108] /dev/input/event2: EV_KEY       0258                 UP                  
[  166021.612108] /dev/input/event2: EV_SYN       SYN_REPORT           00000000             rate 8