VFD as in Vacuum Fluorescent Display, not Variable Frequency Drive. I've had great success using Noritake's CU series display since they are pretty much HT44780 compatible and works with LCD library straight up minus the ability to adjust display brightness. For anyone wondering, pin 3 used for LCD contrast isn't needed on VFD and can be left out. There is no pin 15 and 16 as those are for LCD backlighting.
I wanted to display graphics on GU-7000 series like this one: https://www.youtube.com/watch?v=9jyPCY7JHmM but the link in description is dead and when I looked around, I found Arduino guide but https://www.noritake-elec.com/support/design-resources/support-guide/arduino-code-library-quick-start-guide only shows how to display text on GU-7000 series display, not one bit of info on how to display graphic.
I looked around and only found one on display graphics with Arduino, a dog demo game but the code doesn't appear to explain much in details how the graphic was loaded into the display. It seems like something is trying to tell me Arduino can't do graphic on VFD. There is a guide with AVR studio but it's a bit different and I have no experience there.
All I wanted was to display bitmapped display, not animation or anything fancy. The image would only change depending on status. So anyone here that knows of GU-7000 series? GU-3000 might be similar enough that the code could work.