我们有一个3米的微触摸显示屏.它通过usb连接到我的debian系统,并被识别为人机界面(hid).我正在尝试访问并推送实时信息…如果它被触及我想知道哪里(x,y)并通过netcat管道到另一台主机.

不幸的是,我只能使用原始数据

cat /dev/input/event2 | hexdump

要么

evtest

你得到的hexcode似乎没有记录……

有人知道如何获取这些信息吗？必须有一种从十六进制代码中提取它的方法.不幸的是我不知道如何解释hexcode.我找不到任何有文件记载的来源……

有没有办法让内核能够实时提供我想要的信息？

作为一个解决方案,可能有一个X-Server可以告诉我的解决方案？触摸屏的行为类似于X中的鼠标.我实际上已经尝试通过xlib获取鼠标的x,y位置.但它太慢了,无法告诉我是否有人在接触……

提前致谢！

evtest样本输出：

Event: time 1425319271.595631, type 3 (EV_ABS), code 57 (ABS_MT_TRACKING_ID), value 51

Event: time 1425319271.595631, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 10304

Event: time 1425319271.595631, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 30629

Event: time 1425319271.595631, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 893

Event: time 1425319271.595631, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 414

Event: time 1425319271.595631, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1

Event: time 1425319271.595631, type 3 (EV_ABS), code 0 (ABS_X), value 10304

Event: time 1425319271.595631, type 3 (EV_ABS), code 1 (ABS_Y), value 30629

Event: time 1425319271.595631, -------------- SYN_REPORT ------------

Event: time 1425319271.601632, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 10306

Event: time 1425319271.601632, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 30625

Event: time 1425319271.601632, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 962

Event: time 1425319271.601632, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 421

Event: time 1425319271.601632, type 3 (EV_ABS), code 47 (ABS_MT_SLOT), value 1

Event: time 1425319271.601632, type 3 (EV_ABS), code 57 (ABS_MT_TRACKING_ID), value 52

Event: time 1425319271.601632, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 15416

Event: time 1425319271.601632, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 24159

Event: time 1425319271.601632, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 649

Event: time 1425319271.601632, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 354

Event: time 1425319271.601632, type 3 (EV_ABS), code 0 (ABS_X), value 10306

Event: time 1425319271.601632, type 3 (EV_ABS), code 1 (ABS_Y), value 30625

Event: time 1425319271.601632, -------------- SYN_REPORT ------------

Event: time 1425319271.606626, type 3 (EV_ABS), code 47 (ABS_MT_SLOT), value 0

Event: time 1425319271.606626, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 10318

Event: time 1425319271.606626, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 30609

Event: time 1425319271.606626, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 1014

Event: time 1425319271.606626, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 426

Event: time 1425319271.606626, type 3 (EV_ABS), code 47 (ABS_MT_SLOT), value 1

Event: time 1425319271.606626, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 24161

Event: time 1425319271.606626, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 681

Event: time 1425319271.606626, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 376

Event: time 1425319271.606626, type 3 (EV_ABS), code 0 (ABS_X), value 10318

Event: time 1425319271.606626, type 3 (EV_ABS), code 1 (ABS_Y), value 30609

Event: time 1425319271.606626, -------------- SYN_REPORT ------------

Event: time 1425319271.611629, type 3 (EV_ABS), code 47 (ABS_MT_SLOT), value 0

Event: time 1425319271.611629, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 10320

Event: time 1425319271.611629, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 30605

Event: time 1425319271.611629, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 1053

Event: time 1425319271.611629, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 430

Event: time 1425319271.611629, type 3 (EV_ABS), code 47 (ABS_MT_SLOT), value 1

Event: time 1425319271.611629, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 705

Event: time 1425319271.611629, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 392

Event: time 1425319271.611629, type 3 (EV_ABS), code 0 (ABS_X), value 10320

Event: time 1425319271.611629, type 3 (EV_ABS), code 1 (ABS_Y), value 30605