Waveshare 3.2" display issue

[Luny Calvin]

Hello everyone,

I have been struggling for hours with my new waveshare display that I ordered especially because I knew it would be compatible with recalbox.
I followed everything on the wiki page :

• Download, rename and copy the dtb files to waveshare32b.dtbo and waveshare35a.dtbo to /boot/overlays
• Edit the /boot/config.txt file to add the information from the wiki at the end of the file
• Download the fbcp file and copy it to /usr/bin after fixing the permissions

And I still end up with a white screen
HDMI works perfectly and the resolution is 320x240 as expected. What did I miss?

I looked everywhere for an answer, but no luck.

Thanks for your help!

[abunille]

deleted sorry , wrong display

[acris]

You need to edit recalbox.conf

Modifiy the ̀recalbox.conf` file like :

#global.videomode=DMT 87 HDMI
global.videomode=default
 
#global.ratio=auto
global.ratio=4/3

Save the file, and reboot. The screen should now work perfectly. If you encounter some problems, first check that the fbcp program is running with :

ps aux | grep fbcp

https://github.com/recalbox/recalbox-os/wiki/TFT-Screen-SPI-Bus-(EN)#configure-your-waveshare-32-resistif-tft-screen

[Luny Calvin]

@acris Thanks for your answer, but the screen is still white

I had already modified the file, and fbcp outputs this in the log file :

RECALBOX user.info fbcp[599]: Primary display is 320 x 240
RECALBOX user.err fbcp[599]: Unable to open secondary display

I guess I will have to way for the 4.1 unstable update to be back online, but I would really like to know what I missed

[acris]

@Luny-Calvin

are you make this file ?

Create a new file named S11fbcp in /etc/init.d/ :

#!/bin/sh
 
case "$1" in
        start)
                printf "Starting fbcp ... "
                start-stop-daemon -S -q -m -b -p /var/run/fbcp.pid --exec /usr/bin/fbcp -- -n
                echo "done."
                ;;
        stop)
                printf "Stopping fbcp ..."
                start-stop-daemon -K -q -p /var/run/fbcp.pid
                echo "done."
                ;;
        restart)
                $0 stop
                sleep 1
                $0 start
                ;;
        *)
                echo "usage: $0 {start|stop|restart}"
                ;;
esac

i think you passed a step

• Download, rename and copy the dtb files to waveshare32b.dtbo and waveshare35a.dtbo to /boot/overlays + chmod 777
• Edit the /boot/config.txt file to add the information from the wiki at the end of the file
• Download the fbcp file and copy it to /usr/bin after fixing the permissions
• Create a new file named S11fbcp in /etc/init.d/ + chmod 777
• Edit recalbox.conf

make : ps aux | grep fbcp and post result

and you need to :

• install recalbox 4.0.1 official on microsd on TV HDMI
• update 4.0.1 ->4.0.2
• use recalbox theme

https://github.com/recalbox/recalbox-os/wiki/Recalbox-support-(EN)

@ian57 any idea ?

[Luny Calvin]

@acris
I did create the S11fbcp file but I didn't change the permissions for the dtbo files !
I will try this this evening (I just got to work and I already want to leave :P)

[Luny Calvin]

@acris
Still nothing, always a white screen even with chmod 777.
ps aux | grep fbcp gives:

  633 root     grep fbcp

Here is my config.txt file:

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
 
disable_overscan=1
 
# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1
 
# comment to get jack audio
hdmi_drive=2
 
config_hdmi_boost=0
 
# force hdmi while the tv can take time before sending the signal on the hdmi output
#hdmi_force_hotplug=1
 
# uncomment for composite PAL
#sdtv_mode=2
 
# uncomment for lirc-rpi
#dtoverlay=lirc-rpi
 
# if you plug your tv at the same time as your rpi and that the rpi switches from the hdmi or give a low resolution because tv had no enough time to initialize it
boot_delay=3
 
# uncomment if you don't want the rainbow at startup
disable_splash=1
 
# Overclock
gpu_mem_256=128
gpu_mem_512=256
gpu_mem_1024=512
 
avoid_safe_mode=1
 
kernel=zImage
 
#Waveshare 3.2 TFT Screen
#same resolution for hdmi and tft
hdmi_force_hotplug=1
hdmi_cvt=320 240 60 1 0 0 0
hdmi_group=2                
hdmi_mode=1                 
hdmi_mode=87                
 
dtparam=spi=on              
dtoverlay=waveshare32b:rotate=270,speed=82000000

And the file permissions for the overlays:

-rwxr-xr-x    1 root     root          2354 Aug  2 21:36 waveshare32b.dtbo
-rwxr-xr-x    1 root     root          2682 Aug  2 21:36 waveshare35a.dtbo

fbcp still outputs the same thing in the log file.

Here is the archive from the recalbox-support script: http://dl.free.fr/rluEHn909

[fs]

@luny-calvin This is 755, not 777.

[Luny Calvin]

@fs
You're right! But the /boot/overlays folder is on a FAT32 partition, so I can't change the permissions. But r-x should be enough, right?