USB HDMI touch screen with Raspberry Pi.

[cjoo...@gmail.com]

Hi, guys.

I just purchased a 7" touch screen from China, which is very similar with Waveshare's.

I installed Kivy on RPi and setting input providers like below:

[input]
mouse = mouse
mtdev_%(name)s = probesysfs,provider=mtdev
hid_%(name)s = probesysfs,provider=hidinput

If I execute sample kivy app, touch screen does not work..

pi@raspberrypi:~ $ python kivy/examples/demo/pictures/main.py
[INFO   ] [Logger      ] Record log in /home/pi/.kivy/logs/kivy_17-04-24_11.txt
[INFO   ] [Kivy        ] v1.9.2.dev0, git-e8f7f3e, 20170424
[INFO   ] [Python      ] v2.7.9 (default, Sep 17 2016, 20:26:04)
[GCC 4.9.2]
[INFO   ] [Factory     ] 194 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil, img_gif                                                                                                           (img_ffpyplayer ignored)
[INFO   ] [Window      ] Provider: egl_rpi
[INFO   ] [GL          ] Using the "OpenGL ES 2" graphics system
[INFO   ] [GL          ] Backend used <gl>
[INFO   ] [GL          ] OpenGL version <OpenGL ES 2.0>
[INFO   ] [GL          ] OpenGL vendor <Broadcom>
[INFO   ] [GL          ] OpenGL renderer <VideoCore IV HW>
[INFO   ] [GL          ] OpenGL parsed version: 2, 0
[INFO   ] [GL          ] Shading version <OpenGL ES GLSL ES 1.00>
[INFO   ] [GL          ] Texture max size <2048>
[INFO   ] [GL          ] Texture max units <8>
[INFO   ] [Shader      ] fragment shader: <Compiled>
[INFO   ] [Shader      ] vertex shader: <Compiled>
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [GL          ] NPOT texture support is available
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [GL          ] Unpack subimage support is available
[INFO   ] [OSC         ] using <multiprocessing> for socket
[INFO   ] [ProbeSysfs  ] device match: /dev/input/event0
[INFO   ] [MTD         ] Read event from </dev/input/event0>
[INFO   ] [ProbeSysfs  ] device match: /dev/input/event1
[INFO   ] [MTD         ] Read event from </dev/input/event1>
[INFO   ] [ProbeSysfs  ] device match: /dev/input/event0
[INFO   ] [HIDInput    ] Read event from </dev/input/event0>
[INFO   ] [ProbeSysfs  ] device match: /dev/input/event1
[INFO   ] [HIDInput    ] Read event from </dev/input/event1>
[INFO   ] [Base        ] Start application main loop
[INFO   ] [MTD         ] </dev/input/event0> range position X is 0 - 4095
[INFO   ] [MTD         ] </dev/input/event0> range position Y is 0 - 4095
[INFO   ] [MTD         ] </dev/input/event0> range touch major is 0 - 0
[INFO   ] [MTD         ] </dev/input/event1> range position X is 0 - 1024
[INFO   ] [MTD         ] </dev/input/event0> range touch minor is 0 - 0
[INFO   ] [MTD         ] </dev/input/event1> range position Y is 0 - 600
[INFO   ] [HIDMotionEvent] using <ADS7846 Touchscreen>
[INFO   ] [MTD         ] </dev/input/event0> range pressure is 0 - 255
[INFO   ] [MTD         ] </dev/input/event1> range touch major is 0 - 0
[INFO   ] [HIDMotionEvent] <ADS7846 Touchscreen> range ABS X position is 0 - 409                                                                                                          5
[INFO   ] [HIDMotionEvent] using <深圳市全动电子技术有限公司 ByQDtech 触控USB鼠                                                                                                          标>
[INFO   ] [MTD         ] </dev/input/event0> axes invertion: X is 0, Y is 0
[INFO   ] [MTD         ] </dev/input/event1> range touch minor is 0 - 0
[INFO   ] [HIDMotionEvent] <ADS7846 Touchscreen> range ABS Y position is 0 - 409                                                                                                          5
[INFO   ] [MTD         ] </dev/input/event0> rotation set to 0
[INFO   ] [HIDMotionEvent] <深圳市全动电子技术有限公司 ByQDtech 触控USB鼠标> ran                                                                                                          ge ABS X position is 0 - 1024
[INFO   ] [MTD         ] </dev/input/event1> range pressure is 0 - 255
[INFO   ] [HIDMotionEvent] <ADS7846 Touchscreen> range ABS pressure is 0 - 65535
[INFO   ] [HIDMotionEvent] <深圳市全动电子技术有限公司 ByQDtech 触控USB鼠标> ran                                                                                                          ge ABS Y position is 0 - 600
[INFO   ] [MTD         ] </dev/input/event1> axes invertion: X is 0, Y is 0
[INFO   ] [HIDMotionEvent] <深圳市全动电子技术有限公司 ByQDtech 触控USB鼠标> ran                                                                                                          ge position X is 0 - 1024
[INFO   ] [MTD         ] </dev/input/event1> rotation set to 0
[INFO   ] [HIDMotionEvent] <深圳市全动电子技术有限公司 ByQDtech 触控USB鼠标> ran                                                                                                          ge position Y is 0 - 600
 Exception in thread Thread-4:
 Traceback (most recent call last):
   File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
     self.run()
   File "/usr/lib/python2.7/threading.py", line 763, in run
     self.__target(*self.__args, **self.__kwargs)
   File "/usr/local/lib/python2.7/dist-packages/kivy/input/providers/hidinput.py                                                                                                          ", line 683, in _thread_run
     data = fd.read(struct_input_event_sz)
 IOError: [Errno 19] No such device

Sometimes it works without this error above, and sometimes error occurs.

What is the correct configuration value for this touch screen?

Please help me.