friendofmegaman
Offline
CA

Today I'm being one of those annoying people who creates two (or more) topics in a row.

The idea: RGB backlight + RGB LEDs to illuminate silicon buttons. All controlled by Arduino.

When a button pressed it lights up in its own color (say, A - red, B - green, DPAD-blue, etc).

In the variable clock mode (when LTC is on that is) all buttons are lit and the color changes depending on the speed. Blue (Slow) -> Red (Fast). Thus the pot will be a stereo pot.

Now the question is - how to let arduino know that a button was pressed?

Last edited by friendofmegaman (Jun 17, 2014 9:54 pm)

Jazzmarazz
Offline
Michigan

Easy, read the data sheet. lol
http://www.devrs.com/gb/files/gbspec.txt
CTRL+F "I/O Registers"
and read up on how the GB reads button presses and then check the schemataic:
http://www.freeinfosociety.com/electron … hp?id=1449

I suggest connecting P10 - P15 to digital inputs. Enable pull ups on your P10-P13 inputs. Conventional code will
1. activate P14,
2. read P10 - P13
3. deactivate P14
4. activate P15
2. read P10 - P13

Connect P14 and P15 to interrupts and when one goes low, read P10-P13. The datasheet will tell you how to know which button is pressed.

Jazzmarazz
Offline
Michigan

This will...only work when the gambeoy itself is looking to read buttons though. If you want to be able to read presses at any time, I cannot help you. To be honest, the gameboy may be looking for a button press a million times a second, so the compromise is minimal at best.

Last edited by Jazzmarazz (Jun 17, 2014 10:06 pm)

friendofmegaman
Offline
CA
Jazzmarazz wrote:

This will...only work when the gambeoy itself is looking to read buttons though. If you want to be able to read presses at any time, I cannot help you. To be honest, the gameboy may be looking for a button press a million times a second, so the compromise is minimal at best.


Oh that's quite enough for me smile Thank you kindly wink

Jazzmarazz
Offline
Michigan

Let us know how it goes, with photos!