Are small cheap gpio connected tft's to slow for gaming with Retropie

la-luva

I have this tft screen connected to Raspberry Pi via gpio: Waveshare Spotpear 3.5.
Have managed to get Retropie up and go on this screen(after a lot of struggle) but framerate is really slow.
Is this screen usless for gaming with Retropie?

Or have i done something wrong with installing drivers on to Retropie?

senkun

@la-luva

in general any tft gpio/spi screen over 3.2" would have framerate issues because afaik they're driving at least 480x320. Anything 3.2" and under would normally be 320x240 and depending on controller chip /bus implementation /drivers, should give acceptable speeds.

if you want small and fast, analogue screens can be had for cheap. there are generally 3.5" to 4.3" or more. you'd just need to splice or buy an AV breakout adapter for your pi's 3.5mm output (audio from there too.)

and then from 5" up, you can go hdmi which would be the easiest, plug and play. touchscreens are another story.

la-luva

Hello.
Thanks for reply, that confirmed my experience.
Have done a raspberry, retropie, Gameboy DMG mod, with a 3.5" "backup monitor" with composite in.
Picture is ok but not good, there are some disturbance in picture, maybe this could be done better by doing some (emc) shielding on picture signal cable. Or rerouting it in dmg case.

It was then i had this 3.5 Waveshare screen who would give so much better picture to this setup if it had been fast enough.
But now after several evenings and hours installing and reinstalling Retropie im about to give up this screen for this project.

But i also have a Itead 2.8 itdb02 tft screen.
Who will fit into a Gameboy Pocket or Color, maybe this will give better fps.
But i have big problems figuring out how to wire/ connnect it to the Pi, because it is not a direct plug on but have to use wire