The goal was to replace the official IO Board from my pop'n cabinet with a DIY controller instead, for stability reasons (Konami IO boards are prone to failure, most Pop'n Music cabinets in the wild have broken lamps...) but also for QoL improvements (this allows me to use my panel system-wide and not only in-game, which means I can control a multiboot menu, play with emulators etc..).

In combination with the PN5180-cardio project, the whole IO from a Pop'n Music cabinet can be replaced pretty cheaply :)

Demo

https://www.instagram.com/p/CBWgSMklvvT/

Acknowledgments

Other pop'n controller codes like Knuckleslee's https://github.com/knuckleslee/RhythmCodes/ or 4yn's https://github.com/4yn/iivx/tree/master/leoo/leoo are widely popular.

They are usually based on mon's https://github.com/mon/Arduino-HID-Lighting which is based on NicoHood's https://github.com/NicoHood/HID/blob/master/src/SingleReport/RawHID.cpp

As I needed more gpio than usual, this project was my first time working with Arduino Due and unfortunately the USB HID definitions are not compatible with Leonardo code so a lot of changes had to be made.

The keypad code uses the Keypad library by Mark Stanley and Alexander Brevig.

Supported devices and requirements

This code has been tested on Arduino Due. It should still compile for Leonardo provided you redefine the pinout.

The keypad code requires the Keypad library by Mark Stanley and Alexander Brevig. It can be installed from the Arduino IDE Library manager.

Features

I/O

This controller has 12 buttons (9 buttons + coin + service + test) and 18 lights (9 buttons + 5 top neon + 4 side pillar).

It also has 7 pins for the 12-key numpad, following the original cabinet pinout. It is recognized as a separate keyboard, and it is mapped to the toprow rather than the numpad (due to lack of stability when sending the numlock command to the BemaniPC).

The 00 key is mapped to comma (for direct compatibility with spicetools) and the originally unused bottom right key is mapped to the default card scan key.

It also has a cool light animation on boot which you can easily adapt to your liking :)

Light modes

There are 4 different modes :

Reactive mode

This mode roughly simulates AC lighting and was meant to be used for emulators or other games with no HID light support.

Pressing a button will trigger blinking lights from the side pillars, blue most of the time, red with 1/7 probability, and purple with 1/20 probability.

The top neons follow a fill-empty pattern whose speed is dynamically adjusted with the rate at which you press buttons (might need more work tweaking values, but looks good enough already).

HID mode

This is the original IO board mode where only messages from the game can control the lamps.

Mixed mode (default mode)

This combines the HID messages with button presses for instant lighting (you don't have to wait for the game to register the input and send a message back to light the lamp, and as a bonus it also allows you to play with the lights while the cabinet is booting ;) ).

Invert mode

This is like the Mixed mode except ON and OFF states are switched around just for the fun of it. Might be even more fun to use with colored leds and nothing but white buttons.

Switching lightmodes

You can either press button 2 (left yellow button) while holding service to switch between modes, or you can request a mode change with an HID message, which is incredibly useful in a multiboot environment as you can set the proper lightmode from the commandline before launching a game.

I included pre-compiled binaries and sources in the "ModeSwitch" folder. Refer to readme.md inside that folder for more details.

Pinout

The Arduino DUE has 3.3v logic whereas the Pop'n Music cabinet lamps use 12V. Therefore I'm using mosfet transistors to do level shifting (the parts I used were three ULN2003APG chips).

Refer to pinout.png to see how it is all wired to a Pop'n Music cabinet.

LightPins 36 to 52 = Button lights 1 to 9
LightPins 37 to 53 = Top Neon 1 to 5, Left 1 (blue) 2 (red), Right 1 (blue) 2 (red)
  connect pin to mosfet gate then mosfet drain to - terminal of LED
  connect ground to mosfet ground (daisychain)
  connect +12V to + terminal of LED (daisychain)
ButtonPins 5 to 13 = Button input 1 to 9
ButtonPins 4 3 2 = Test, Service, Coin
  connect button pin to ground to trigger button press