Need help to make VoCore 4" touchscreen work on Raspbian

menezesbruno
 
Posts: 4
Joined: Thu Aug 05, 2021 1:30 pm

Need help to make VoCore 4" touchscreen work on Raspbian

Thu Aug 05, 2021 1:43 pm

Hi guys!
I'm trying to use the VoCore 4" Screen on my Raspbian, but the touchscreen is not working. The screen is already working, but not the touch.
How can I check if the touchscreen part is being correctly detected by the OS?
In Windows the touchscreen works perfectly.

LSUSB returns :
Bus 001 Device 004: ID c872:1004

Thanks in advance

https://photos.app.goo.gl/YsdshHin8Tx1rSwJ6

Vonger
 
Posts: 841
Joined: Sun Oct 19, 2014 6:00 am

Re: Need help to make VoCore 4" touchscreen work on Raspbian

Thu Aug 05, 2021 2:55 pm

If you use kernel driver fbusb, it will map a evdev in system.
If you use libusb, you need to call libusb_interrupt_* functions
Please check our source code of screen_test,c at http://vonger.cn/misc/screen/v2touch-win64.zip
That code can work in macos and linux and windows, just need libusb.

menezesbruno
 
Posts: 4
Joined: Thu Aug 05, 2021 1:30 pm

Re: Need help to make VoCore 4" touchscreen work on Raspbian

Thu Aug 05, 2021 6:19 pm

Thanks for the fast reply.

I was doing some checks at dmesg and it seems to be loaded, but I'm unable to map the device as the default pointer device
Any clues?

Image

menezesbruno
 
Posts: 4
Joined: Thu Aug 05, 2021 1:30 pm

Re: Need help to make VoCore 4" touchscreen work on Raspbian

Thu Aug 05, 2021 8:35 pm

Here you can see that the touchscreen is being detected, however, it doesn't respond to touches on the screen

Image

menezesbruno
 
Posts: 4
Joined: Thu Aug 05, 2021 1:30 pm

Re: Need help to make VoCore 4" touchscreen work on Raspbian

Fri Aug 06, 2021 10:17 pm

After a lot of different approaches, I decided to test it again in Windows and... well, the touchscreen isn't working at all, I've tested using the screen_test.exe.
The screen show the image but the touchscreen doesn't work at all.

Not sure what I've done to the screen, because I was careful with the cables, wiring etc.
Is there a way to check for visible damages to the touchscreen part?

Vonger
 
Posts: 841
Joined: Sun Oct 19, 2014 6:00 am

Re: Need help to make VoCore 4" touchscreen work on Raspbian

Mon Aug 09, 2021 8:56 am

Oh, if in windows screen_test is still not work, I guess it must be somewhere physics broken.
Maybe the FPC(8p). It is pretty easy to tear off if not install in safe place.

Return to VoCam264 & Screen

Who is online

Users browsing this forum: No registered users and 2 guests