[Guide] ili9341 SPI TFT Screen on Retropie

[moosepr]

I think there is another screen driver that uses that resolution h..... Or something. I'm in a field camping at the moment so I can't look property, but if you do some searching using the resolution as your search, you might find it.

It is just a case of getting the right driver really!

[Holydohnut]

The correct name of the one I tried was hx8430bn is that the one you're referring to? I think I get closer with the one than any other, (The hdmi screen "freezes" after the con2fbmap 1 1 command, and returns after you run con2fbmap 1 0 with the displayed text looking very much like the resolution of the screen. The tft meanwhile, just stays white.

20170802_095803.jpg (3.44 MiB) Viewed 8965 times

Thanks for looking at this. Enjoy your camping! Hope you're have decent weather!

[moosepr]

Yeah that was the one I was thinking of. The HDMI appears to stop working as the TFT then becomes your console (when it's working!)

The screen will go black once it has been initialized, so a white screen doesn't look good.

There is a flex FB driver system that was designed to be a 'one tool fixes all' solution, but I have not really played with it

https://github.com/notro/fbtft/wiki/flexfb

[Holydohnut]

I had a play with the flex driver, but nothing happens. (no backlight or anything) obviously there isn't a full command on that page for the 9225, but the default bits it picks up clearly doesn't cut it.

Not to worry. Thank you very much for your help. Guess this one is not to be. I now have "another" 9341 coming from a different seller. Hopefully they'll send the correct one this time!

[gamedude13]

I just followed the guide in the opening post (with exactly the same screen) and everything works great!
Do you also notice the very limited viewing area screen? Does anybody have some good advice for a nice screen for a GBA mod? Preferably with a much better viewing angle?

[moosepr]

I'm glad you had success! The viewing angles are not the best, they are actually designed to be used in portrait mode with the chip section at the bottom. But that is kinda the wrong way for gaming! There is a less common ili9342 that is apparently the same screen in landscape, but I have not had chance to test mine yet

[angryjelly24]

Hi im trying to get my ILI9341 Screen to work on my pi 3. Basically im planning a mintypi build by wermy but im testing out the screen on a pi 3 first since it has the gpio headers which make it easier to connect or disconnect wires. I followed the wiring guide and installed a fresh copy of retropie. However i only get a white screen after the modprobe command and con2fbmap 1 1 doesnt do anything. I looked around and realised that i might need to get the fbtft drivers first. So i installed the mintypi image(since it has the drivers) and put it on my pi 3 again. This time my screen doesnt even light up after modprobe. Is there anything obvious im missing? What can i do to fix this? Im completely new to this so i could rly use some help!!
Link to the screen i used: http://www.ebay.com.sg/itm/2-2-inch-TFT ... 2749.l2649

[angryjelly24]

Hi im trying to get my ILI9341 Screen to work on my pi 3. Basically im planning a mintypi build by wermy but im testing out the screen on a pi 3 first since it has the gpio headers which make it easier to connect or disconnect wires. I followed the wiring guide and installed a fresh copy of retropie. However i only get a white screen after the modprobe command and con2fbmap 1 1 doesnt do anything. I looked around and realised that i might need to get the fbtft drivers first. So i installed the mintypi image(since it has the drivers) and put it on my pi 3 again. This time my screen doesnt even light up after modprobe. Is there anything obvious im missing? What can i do to fix this? Im completely new to this so i could rly use some help!!
Link to the screen i used: http://www.ebay.com.sg/itm/2-2-inch-TFT ... 2749.l2649

woo nevermind got it working haha, apparently i needed to exit emulation station after modprobe for it to work??

[angryjelly24]

Is there any way to change the font size on the screen, or like lower the brightness of the backlight?

[moosepr]

To change the font size, you will need to investigate different themes for emulation station. You can manually edit the theme XML file, but you're on your own with that one.

The brightness can be changed, as pin 18 can use PWM. I have never bothered myself, but there is more info here
https://github.com/notro/fbtft/wiki/Backlight