Tft screen update

Ryan and I have been looking again at the tft35 touch screen firmware.

There have been a lot of updates from bigtree tech. I started from a fresh checkout and added logic to allow zero extruders.

If you load the firmware now, you will still see a lot of menu items about 3D printing. But they don’t send any unknown commands.

I hope this ends up in a more stable touch screen mode.

There may still be a few more tweaks in the next week or so. But if you want to check it out:

The precompiled binary and config files: