Freeplay CM4

[Flavor]

I think that fbcp should work. There are 2 versions of it.

This one is unoptimized, but it should work just about anywhere.
https://github.com/TheFlav/rpi-fbcp
Take a look at the install script at https://github.com/TheFlav/rpi-fbcp/blob...install.sh and notice that it uses a .dtbo that needs to be copied in and added to config.txt
It also has a file called /boot/freeplayfbcp.cfg that it reads for configuration parameters.

You might want to look over https://github.com/TheFlav/Freeplay-Supp...config.txt and see the
dtoverlay=waveshare32b,speed=80000000,fps=60,rotate=270

The speed could be turned down if you're having problems. It's possible that the adapter board introduces noise/delays that might not play well with the speed setting.

You could also just grab the dtbo with this command.
sudo wget --output-document=/boot/overlays/waveshare32b.dtbo https://github.com/TheFlav/Freeplay-Supp...2b-fp.dtbo

In fact, you should take a look at https://docs.google.com/document/d/1jsMi...-zHSQ/edit# to get a better idea of what all goes into the Freeplay SD .img.

After having said all that, I would assume that the SD image you tried before didn't work because the base Raspbian (it was built on) didn't include CM4 support. I have released a newer SD image that MAY just work for you. Check
https://drive.google.com/drive/folders/0...dwp_RqwzsQ for "Freeplay_CM3-and-Zero2_Test_22061501.img.gz" and see if that just works.

Oh, and, I said there were 2 FBCP versions.
The other (very optimized) version is at https://github.com/juj/fbcp-ili9341 and I would suggest reading/discussing things more there if you can't get it to work. They allow tuning the speed in different ways.

The other place to investigate is https://github.com/Mootikins/FreeplayILI9341 which contains some pre-built binaries of the juj fbcp-ili9341 and some install scripts.

I hope that all helps. I'm betting that the new SD image works, but I dunno.