Problem display 3,5 480x320 SPI

Help and Support
1

hello,

I boght new display from waveshare 3,5 LCD B. it connected via gpio and backlight is working.
but, nothing more. I tried to install drivers from github a lot of time, but still same result.

the system felt down and by next boot some where stoped. for was neccessery reinstall system again.

I would like to ask if has sombody the same experiences and some solution.

thanks,
michal

2

I suggest to start with a fresh Volumio version (BTW: What is your Volumio version?).

Then nstall the Touch Display plugin from the plugin store.

Don’t run the install script from Waveshare. You will have to do some adjustments to /boot/userconfig.txt and maybe some other files, too. We can do this step by step.

What is necessary depends on the model of your display.

Do you have revison 2 of the display?

3

I have RPI 3B v2, display is rev2, and volumio is from today.

4

Assuming you are starting with a fresh Volumio system:

  1. Install the Touch Display plugin.

  2. Download the display specific overlay:

wget https://raw.githubusercontent.com/waveshare/LCD-show/master/waveshare35b-v2-overlay.dtb

  1. Copy the overlay to “/boot/overlays/waveshare35b-v2.dtbo”:

sudo cp waveshare35b-v2.dtb /boot/overlays/waveshare35b-v2.dtbo

  1. Open “/boot/userconfig.txt”:

nano /boot/userconfig.txt

  1. Add the following lines:
dtparam=spi=on
dtoverlay=waveshare35b-v2

  1. Save “/boot/userconfig.txt” by typing Ctrl+x then y and Enter.

  2. Download “99-calibration.conf-35b” as it might be necessary to calibrate the screen:

wget https://raw.githubusercontent.com/waveshare/LCD-show/master/etc/X11/xorg.conf.d/99-calibration.conf-35b

  1. Create “/etc/X11/xorg.conf.d” in case it’s missing and copy “99-calibration.conf-35b” to “/etc/X11/xorg.conf.d/99-calibration.conf”:

sudo mkdir -p /etc/X11/xorg.conf.d
sudo cp 99-calibration.conf-35b /etc/X11/xorg.conf.d/99-calibration.conf

  1. Open “/usr/share/X11/xorg.conf.d/99-fbturbo.conf” with

sudo nano /usr/share/X11/xorg.conf.d/99-fbturbo.conf

and change

Option "fbdev" "/dev/fb0"

to

Option "fbdev" "/dev/fb1"

Save the file hitting Ctrl-x, y and Enter.

  1. For touch function you probably need to install “xserver-xorg-input-evdev” running

sudo apt-get install xserver-xorg-input-evdev

and then execute

sudo cp /usr/share/X11/xorg.conf.d/10-evdev.conf /usr/share/X11/xorg.conf.d/45-evdev.conf

  1. After all that reboot.

Check if touch works and if display and touch orientation are aligned and report back.

5

dear gvolt,

you are the best!

the display is working very nice.

have nice evening,
Michal

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