Pi Zero W GBA [BUILD]

moosepr · 14 Sept 2017, 12:14

@techieandroid yeah thats the baby!!

TechieAndroid · 15 Sept 2017, 13:42

@alulagoa said in Pi Zero W GBA [BUILD]:

@techieandroid
That one looks good to me.

@moosepr said in Pi Zero W GBA [BUILD]:

@techieandroid yeah thats the baby!!

Okay thanks guys I got it.

Should come soon. Then I can finish building it. :)

I've got my live stream setup so I'll stream it live when I begin building it.
FWIF I think some will watch.

TechieAndroid · 24 Sept 2017, 03:13

@moosepr
Okay so I've got and setup the new screen but I don't like it at all. I don't know if this can be tweaked (probably, I just haven't tried yet) but the screen's dpi is messed up (everything it too small, which is probably just a wrongly set resolution from before when I had a tv connected), and the other major problem is it stutters so bad I can't play any game on it (it stutters, drops frames and tears).

spruce_m00se · 24 Sept 2017, 05:26

@hex I would disagree with this, I have one from Ebay which I converted to 5v and I think its junk, the contrast is poor, and when you have white pixels on a black background you get ghosting across that whole horizintal line of pixels, not the mention that the screen gets incredibly hot.
it is also poor resolution,
yes it works for gaming, just about, but if you are going to invest a good amount of time then I would try to get a better screen.

Hex · 24 Sept 2017, 05:30

@spruce_m00se Can you show a comparison photo/video?

spruce_m00se · 24 Sept 2017, 05:33

@hex I can show a photo at some point, but annoyingly the usb hub i built into the gameboy isnt compatible with keyboards, grrrr, that means that I need to desolder it and conenct a keyboard for some config as I had an urgent money making project (a lotof money ) last month and needed a micro sd urgently, so I robbed the one from the gameboy. now I have to reinstal the gpio pin controller setup before I can play again,

Hex · 24 Sept 2017, 05:42

@spruce_m00se Some point is fine.

spruce_m00se · 24 Sept 2017, 05:47

@hex what would you like to see? the ghosting? or would you like to see the actual screen?

spruce_m00se · 24 Sept 2017, 05:54

I have a photo of the LCD driver board, the circled white components are Caps that get super hot, I tried to put a ceramic cap alongside them to filter out any high frequency ripple, it didnt really do anything.
the whole thing gets so hot that it softens the hotglue thats holding it in place, and the individual caps get too hot to touch,

Hex · 24 Sept 2017, 05:57

I think you have a short or you have not converted it properly. My LCD board used to do that when I connected to the wrong terminal. Now it runs between room temp and warm. I can keep my finger on the chipset for extended periods.

TechieAndroid · 24 Sept 2017, 14:00

@spruce_m00se @Hex

This screen you've been talking about is not the one we've been using in the build. Information not pertaining to this topic belongs in a different thread.

moosepr · 24 Sept 2017, 16:22

@techieandroid if you change the fbtft.config and set the speed to be 80000000 (7 zeros) and add FPS=60

That should improve things

TechieAndroid · 24 Sept 2017, 23:42

@moosepr
Okay cool, thanks I'll try it out.

TechieAndroid · 25 Sept 2017, 00:13

@moosepr
The resolution is defaulted at 720x480, which is probably why it looks bad, I'm going to go into the config and change that to the actual resolution of the screen.

TechieAndroid · 25 Sept 2017, 03:04

@moosepr
I set it to speed=90000000 fps=60 after testing it a lot and like these settings. I was wondering what resolution settings I have to choose from that applies to this screen and not the HDMI, like, I guess this screen would be analog (I don't really know I haven't looked at the spec sheet yet). I'm just trying to set everything to 320x240 which is what the screen is. Also I'm curious about changing the overscan since it appears to be off. Will that mess anything up with this screen?

spruce_m00se · 25 Sept 2017, 05:04

@hex Do you have a link for a conversion tutorial? I have simply soldered the 5v input to the old output of the voltage regulator that I removed, in thoery everything after the voltage regulator is still seeinng the same voltage as before.

Hex · 25 Sept 2017, 05:20

@spruce_m00se Kindly create a new thread and tag me. This is getting off topic

spruce_m00se · 25 Sept 2017, 05:27

@hex hold on, hahahaha

moosepr · 25 Sept 2017, 05:51

@techieandroid you only need to change over scan settings if you are getting borders round your screen.

The screen resolution is 240x320, so setting things to that will help. The fbcp will actually scale things, so as long as the aspect ratio is correct, it shouldn't look too bad. You can also change the theme, there are many that are designed to fit the smaller screens

TechieAndroid · 26 Sept 2017, 18:52

@moosepr
Thanks, I turned overscan off in all the configs and set the resolution everywhere I could, it made a big difference in the terminal but emulation station stayed the same even after adding it in the es config.

I've almost finished my project, all I need now is to get the buttons in.
So I'm going to use the GPIO pins for them, I'll use 10 total for the GBA buttons, do I need to use any specific GPIO pins?
And where do I add the code for the buttons when they are wired in?

Thanks