Force video out through GPIO?

[JJBTEXAS]

I'm trying to build a portable emulator using ADAFRUIT's 3.5TFT and I can't get the pi to display on the TFT. I followed ADAFRUIT's guide to no success. I don't really car about having the touch function as emulation station doesn't have support for that anyways. Anything helps!

[DirkS]

Which screen is that exactly and which guide did you follow (links please)?

[JJBTEXAS]

I can get the screen running using Adafruit's image and I can get petrock's RetroPie image running fine but when I try to install RetroPie on Adafruit's image, or the opposite, I can't get it to work properly.

screen: http://www.adafruit.com/product/2097

guide: https://learn.adafruit.com/adafruit-pit ... spberry-pi

[BMS Doug]

Google has the answers: Retropie will only output by HDMI or composite but there is a workaround:.

After some reading it turns out that the retropie project uses OpenGL for most of its emulators. The FRAMEBUFFER method apparently doesn't support OpenGL so it just won't work.

I've found this post on the pi forums http://www.raspberrypi.org/forums/viewt ... 67&t=58952 which discusses the same thing. They use this https://github.com/tasanakorn/rpi-fbcp utility to copy the framebuffer. Only issue is it may be slow.